mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
synced 2025-03-09 00:00:00 +01:00
dft: tmp debug version
This commit is contained in:
Manuel Pitz
parent
12b2ff8ae5
commit
17291cdab7
1 changed files with 95 additions and 157 deletions
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@ -28,7 +28,6 @@
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#include <cinttypes>
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#include <complex>
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#include <vector>
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#include <villas/timing.h>
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#include <villas/dumper.hpp>
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#include <villas/hook.hpp>
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@ -36,59 +35,49 @@
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#include <villas/sample.h>
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#include <villas/format.hpp>
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#define DFT_MEM_DUMP
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namespace villas {
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namespace node {
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class DftHook : public Hook {
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protected:
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enum class PaddingType {
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enum PaddingType {
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ZERO,
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SIG_REPEAT
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};
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enum class WindowType {
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enum WindowType {
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NONE,
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FLATTOP,
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HANN,
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HAMMING
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};
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enum class FreqEstimationType {
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NONE,
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QUADRATIC
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};
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struct Point {
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double x;
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double y;
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};
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std::shared_ptr<Dumper> origSigSync;
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std::shared_ptr<Dumper> windowdSigSync;
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std::shared_ptr<Dumper> phasorPhase;
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std::shared_ptr<Dumper> phasorAmplitude;
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std::shared_ptr<Dumper> phasorFreq;
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std::shared_ptr<Dumper> ppsSigSync;
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enum WindowType windowType;
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enum PaddingType paddingType;
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enum FreqEstimationType freqEstType;
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std::vector<std::vector<double>> smpMemory;
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std::vector<double> ppsMemory;//this is just temporary for debugging
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std::vector<std::vector<std::complex<double>>> dftMatrix;
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std::vector<std::vector<std::complex<double>>> dftResults;
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std::vector<std::complex<double>> dftResults;
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std::vector<double> filterWindowCoefficents;
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std::vector<std::vector<double>> absDftResults;
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std::vector<double> absDftResults;
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std::vector<double> absDftFreqs;
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uint64_t dftCalcCount;
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unsigned sampleRate;
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double startFreqency;
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double endFreqency;
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double frequencyResolution;
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unsigned dftRate;
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struct timespec dftRate;
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unsigned ppsIndex;
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unsigned windowSize;
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unsigned windowMultiplier; /**< Multiplyer for the window to achieve frequency resolution */
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@ -110,51 +99,42 @@ public:
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Hook(p, n, fl, prio, en),
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windowType(WindowType::NONE),
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paddingType(PaddingType::ZERO),
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freqEstType(FreqEstimationType::NONE),
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smpMemory(),
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ppsMemory(),
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dftMatrix(),
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dftResults(),
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filterWindowCoefficents(),
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absDftResults(),
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absDftFreqs(),
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dftCalcCount(0),
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dftCalcCnt(0),
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sampleRate(0),
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startFreqency(0),
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endFreqency(0),
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frequencyResolution(0),
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dftRate(0),
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dftRate({0, 0}),
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ppsIndex(0),
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windowSize(0),
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windowMultiplier(0),
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freqCount(0),
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syncDft(0),
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smpMemPos(0),
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lastSequence(0),
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windowCorretionFactor(0),
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lastDftCal({0, 0}),
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signalIndex()
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{
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logger = logging.get("hook:dft");
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format = format_type_lookup("villas.human");
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if (logger->level() <= SPDLOG_LEVEL_DEBUG) {
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#ifdef DFT_MEM_DUMP
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bool debug = false;
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if (debug) {
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origSigSync = std::make_shared<Dumper>("/tmp/plot/origSigSync");
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windowdSigSync = std::make_shared<Dumper>("/tmp/plot/windowdSigSync");
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ppsSigSync = std::make_shared<Dumper>("/tmp/plot/ppsSigSync");
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#endif
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phasorPhase = std::make_shared<Dumper>("/tmp/plot/phasorPhase");
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phasorAmplitude = std::make_shared<Dumper>("/tmp/plot/phasorAmplitude");
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phasorFreq = std::make_shared<Dumper>("/tmp/plot/phasorFreq");
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}
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}
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virtual void prepare()
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{
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signal_list_clear(&signals);
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/* Initialize sample memory */
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smpMemory.clear();
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for (unsigned i = 0; i < signalIndex.size(); i++) {
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struct signal *freqSig;
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struct signal *amplSig;
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@ -162,10 +142,10 @@ public:
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struct signal *rocofSig;
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/* Add signals */
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freqSig = signal_create("amplitude", "V", SignalType::FLOAT);
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amplSig = signal_create("phase", "rad", SignalType::FLOAT);
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phaseSig = signal_create("frequency", "Hz", SignalType::FLOAT);
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rocofSig = signal_create("rocof", "Hz/s", SignalType::FLOAT);
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freqSig = signal_create("amplitude", nullptr, SignalType::FLOAT);
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amplSig = signal_create("phase", nullptr, SignalType::FLOAT);
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phaseSig = signal_create("frequency", nullptr, SignalType::FLOAT);
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rocofSig = signal_create("rocof", nullptr, SignalType::FLOAT);
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if (!freqSig || !amplSig || !phaseSig || !rocofSig)
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throw RuntimeError("Failed to create new signals");
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@ -175,40 +155,28 @@ public:
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vlist_push(&signals, phaseSig);
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vlist_push(&signals, rocofSig);
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smpMemory.emplace_back(windowSize, 0.0);
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}
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/* Initialize sample memory */
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smpMemory.clear();
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for (unsigned i = 0; i < signalIndex.size(); i++)
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smpMemory.emplace_back(windowSize, 0.0);
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/* Initialize temporary ppsMemory */
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ppsMemory.clear();
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ppsMemory.resize(windowSize, 0.0);
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/* Calculate how much zero padding ist needed for a needed resolution */
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windowMultiplier = ceil(((double) sampleRate / windowSize) / frequencyResolution);
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windowMultiplier = ceil(((double)sampleRate / windowSize) / frequencyResolution);
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freqCount = ceil((endFreqency - startFreqency) / frequencyResolution) + 1;
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logger->debug("FreqCount : {}", freqCount);
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/* Initialize matrix of dft coeffients */
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dftMatrix.clear();
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for (unsigned i = 0; i < freqCount; i++)
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dftMatrix.emplace_back(windowSize * windowMultiplier, 0.0);
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/* Initalize dft results matrix */
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dftResults.clear();
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for (unsigned i = 0; i < signalIndex.size(); i++){
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dftResults.emplace_back(freqCount, 0.0);
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absDftResults.emplace_back(freqCount, 0.0);
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}
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dftResults.resize(freqCount);
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filterWindowCoefficents.resize(windowSize);
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absDftResults.resize(freqCount);
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absDftFreqs.resize(freqCount);
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for (unsigned i = 0; i < freqCount; i++) {
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absDftFreqs.emplace_back(startFreqency + i * frequencyResolution);
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}
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for (unsigned i = 0; i < absDftFreqs.size(); i++)
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absDftFreqs[i] = startFreqency + i * frequencyResolution;
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generateDftMatrix();
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calculateWindow(windowType);
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@ -218,8 +186,9 @@ public:
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virtual void parse(json_t *cfg)
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{
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const char *paddingTypeC = nullptr, *windowTypeC = nullptr, *freqEstimateTypeC = nullptr;
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const char *paddingTypeC = nullptr, *windowTypeC= nullptr;
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int ret;
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double dftRateIn = 0;
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json_error_t err;
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json_t *jsonChannelList = nullptr;
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@ -228,20 +197,22 @@ public:
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Hook::parse(cfg);
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ret = json_unpack_ex(cfg, &err, 0, "{ s?: i, s?: F, s?: F, s?: F, s?: i , s?: i, s?: s, s?: s, s?: s, s?: b, s?: o}",
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ret = json_unpack_ex(cfg, &err, 0, "{ s?: i, s?: F, s?: F, s?: F, s?: F , s?: i, s?: s, s?: s, s?: s, s?: b, s?: o}",
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"sample_rate", &sampleRate,
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"start_freqency", &startFreqency,
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"end_freqency", &endFreqency,
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"frequency_resolution", &frequencyResolution,
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"dft_rate", &dftRate,
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"dft_rate", &dftRateIn,
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"window_size", &windowSize,
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"window_type", &windowTypeC,
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"padding_type", &paddingTypeC,
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"freq_estimate_type", &freqEstimateTypeC,
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"sync", &syncDft,
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"signal_index", &jsonChannelList,
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"pps_index", &ppsIndex
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"signal_index", &jsonChannelList
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);
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dftRate.tv_sec = (int) (1 / dftRateIn);
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dftRate.tv_nsec = fmod( 1 / dftRateIn, 1) * 1e9;
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if (ret)
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throw ConfigError(cfg, err, "node-config-hook-dft");
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@ -299,13 +270,6 @@ public:
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paddingType = PaddingType::ZERO;
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}
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if (!freqEstimateTypeC) {
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logger->info("No Frequency estimation type given, assume no none");
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freqEstType = FreqEstimationType::NONE;
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}
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else if (strcmp(freqEstimateTypeC, "quadratic") == 0)
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freqEstType = FreqEstimationType::QUADRATIC;
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if (endFreqency < 0 || endFreqency > sampleRate)
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throw ConfigError(cfg, err, "node-config-hook-dft", "End frequency must be smaller than sampleRate {}", sampleRate);
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@ -322,88 +286,101 @@ public:
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for (unsigned i = 0; i < signalIndex.size(); i++)
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smpMemory[i][smpMemPos % windowSize] = smp->data[signalIndex[i]].f;
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// Debugging for pps signal this should only be temporary
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if (ppsSigSync)
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ppsMemory[smpMemPos % windowSize] = smp->data[ppsIndex].f;
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smpMemPos++;
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bool runDft = false;
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if (syncDft) {
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struct timespec timeDiff = time_diff(&lastDftCal, &smp->ts.origin);
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if ((timeDiff.tv_sec*1e9+timeDiff.tv_nsec) > (1e9/dftRate))
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//struct timespec timeDiff = time_diff(&lastDftCal, &smp->ts.origin);
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//double nextCalc = (lastDftCal.tv_sec + dftRate.tv_sec) * 1e9 + lastDftCal.tv_nsec + dftRate.tv_nsec;
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//double dftRateNSec = dftRate.tv_sec * 1e9 + dftRate.tv_nsec;
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//double smpNsec = smp->ts.origin.tv_sec * 1e9 + smp->ts.origin.tv_nsec;
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//if ( nextCalc < (smp->ts.origin.tv_sec * 1e9 + smp->ts.origin.tv_nsec) && fmod( smpNsec, dftRateNSec ) < (110*1e9/(sampleRate)))
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// runDft = true;
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if (smp->ts.origin.tv_sec != lastDftCal.tv_sec)
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runDft = true;
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//if ((fmod(smp->ts.origin.tv_sec*1e9 + smp->ts.origin.tv_nsec, 1e9/dftRate) < (1e9/(dftRate+1))) && ((timeDiff.tv_sec*1e9+timeDiff.tv_nsec) > (1e9/dftRate)))
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//if ((timeDiff.tv_sec*1e9+timeDiff.tv_nsec) > (1e9/dftRate) && )
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// runDft = true;
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}
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if (runDft) {
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lastDftCal = smp->ts.origin;
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// Debugging for pps signal this should only be temporary
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if (ppsSigSync) {
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double tmpPPSWindow[windowSize];
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//if (ppsSigSync) {
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//double tmpPPSWindow[windowSize];
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for (unsigned i = 0; i< windowSize; i++)
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tmpPPSWindow[i] = ppsMemory[(i + smpMemPos) % windowSize];
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//for (unsigned i = 0; i< windowSize; i++)
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// tmpPPSWindow[i] = ppsMemory[(i + smpMemPos) % windowSize];
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ppsSigSync->writeData(windowSize, tmpPPSWindow);
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}
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//ppsSigSync->writeDataBinary(windowSize, tmpPPSWindow);
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//}
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#pragma omp parallel for
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for (unsigned i = 0; i < signalIndex.size(); i++) {
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calculateDft(PaddingType::ZERO, smpMemory[i], dftResults[i], smpMemPos);
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double maxF = 0;
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double maxA = 0;
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unsigned maxPos = 0;
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double tmpImag[freqCount], tmpReal[freqCount], absVal[freqCount];
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for (unsigned j = 0; j < freqCount; j++) {
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int multiplier = paddingType == PaddingType::ZERO
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? 1
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: windowMultiplier;
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absDftResults[i][j] = abs(dftResults[i][j]) * 2 / (windowSize * windowCorretionFactor * multiplier);
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absVal[j] = absDftResults[i][j];
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if (maxA < absDftResults[i][j]) {
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maxF = absDftFreqs[j];
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maxA = absDftResults[i][j];
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maxPos = j;
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}
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tmpImag[j] = dftResults[i][maxPos].imag();
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tmpReal[j] = dftResults[i][maxPos].real();
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}
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windowdSigSync->writeDataBinary(freqCount, tmpImag);
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origSigSync -> writeDataBinary(freqCount, absVal);
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ppsSigSync->writeDataBinary(freqCount, tmpReal);
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if (freqEstType == FreqEstimationType::QUADRATIC) {
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if (maxPos < 1 || maxPos >= freqCount - 1)
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logger->warn("Maximum frequency bin lies on window boundary. Using non-estimated results!");
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else {
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Point a = { absDftFreqs[maxPos - 1], absDftResults[i][maxPos - 1] };
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Point b = { absDftFreqs[maxPos + 0], absDftResults[i][maxPos + 0] };
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Point c = { absDftFreqs[maxPos + 1], absDftResults[i][maxPos + 1] };
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Point estimate = quadraticEstimation(a, b, c, maxPos);
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maxF = estimate.x;
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maxA = estimate.y;
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}
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}
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if (dftCalcCnt > 1) {
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if (phasorFreq)
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phasorFreq->writeData(1, &maxF);
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if (windowSize < smpMemPos) {
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smp->data[i * 4 + 0].f = maxF; /* Frequency */
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smp->data[i * 4].f = maxF; /* Frequency */
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smp->data[i * 4 + 1].f = (maxA / pow(2, 0.5)); /* Amplitude */
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smp->data[i * 4 + 2].f = atan2(dftResults[i][maxPos].imag(), dftResults[i][maxPos].real()); /* Phase */
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smp->data[i * 4 + 2].f = atan2(dftResults[maxPos].imag(), dftResults[maxPos].real()); /* Phase */
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smp->data[i * 4 + 3].f = 0; /* RoCof */
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if (phasorPhase)
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phasorPhase->writeData(1, &(smp->data[i * 4 + 2].f));
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}
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}
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//the following is a debug output and currently only for channel 0
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if (windowSize < smpMemPos){
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if (phasorFreq)
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phasorFreq->writeData(1, &(smp->data[0 * 4 + 0].f));
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phasorFreq->writeDataBinary(1, &(smp->data[0 * 4 + 0].f));
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if (phasorPhase)
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phasorPhase->writeData(1, &(smp->data[0 * 4 + 2].f));
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phasorPhase->writeDataBinary(1, &(smp->data[0 * 4 + 2].f));
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if (phasorAmplitude)
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phasorAmplitude->writeData(1, &(smp->data[0 * 4 + 1].f));
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phasorAmplitude->writeDataBinary(1, &(smp->data[0 * 4 + 1].f));
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}
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smp->length = windowSize < smpMemPos ? signalIndex.size() * 4 : 0;
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@ -411,20 +388,17 @@ public:
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dftCalcCount++;
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}
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if (smp->sequence - lastSequence > 1)
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if ((smp->sequence - lastSequence) > 1)
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logger->warn("Calculation is not Realtime. {} sampled missed", smp->sequence - lastSequence);
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lastSequence = smp->sequence;
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if(runDft && windowSize < smpMemPos)
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if (runDft)
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return Reason::OK;
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return Reason::SKIP_SAMPLE;
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}
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/**
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* This function generates the furie coeffients for the calculateDft function
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*/
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void generateDftMatrix()
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{
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using namespace std::complex_literals;
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@ -438,11 +412,7 @@ public:
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}
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}
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/**
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* This function calculates the discrete furie transform of the input signal
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*/
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void calculateDft(enum PaddingType padding, std::vector<double> &ringBuffer, std::vector<std::complex<double>> &results, unsigned ringBufferPos)
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void calculateDft(enum PaddingType padding, std::vector<double> &ringBuffer, unsigned ringBufferPos)
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{
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/* RingBuffer size needs to be equal to windowSize
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* prepare sample window The following parts can be combined */
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@ -453,12 +423,8 @@ public:
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#ifdef DFT_MEM_DUMP
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if (origSigSync)
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origSigSync->writeData(windowSize, tmpSmpWindow);
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if (dftCalcCount > 1 && phasorAmplitude)
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phasorAmplitude->writeData(1, &tmpSmpWindow[windowSize - 1]);
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//if (origSigSync)
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// origSigSync->writeDataBinary(windowSize, tmpSmpWindow);
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#endif
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for (unsigned i = 0; i < windowSize; i++)
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@ -466,37 +432,33 @@ public:
|
|||
|
||||
#ifdef DFT_MEM_DUMP
|
||||
|
||||
if (windowdSigSync)
|
||||
windowdSigSync->writeData(windowSize, tmpSmpWindow);
|
||||
//if (windowdSigSync)
|
||||
// windowdSigSync->writeDataBinary(windowSize, tmpSmpWindow);
|
||||
|
||||
#endif
|
||||
|
||||
for (unsigned i = 0; i < freqCount; i++) {
|
||||
results[i] = 0;
|
||||
|
||||
dftResults[i] = 0;
|
||||
for (unsigned j = 0; j < windowSize * windowMultiplier; j++) {
|
||||
if (padding == PaddingType::ZERO) {
|
||||
if (j < (windowSize))
|
||||
results[i] += tmpSmpWindow[j] * dftMatrix[i][j];
|
||||
dftResults[i] += tmpSmpWindow[j] * dftMatrix[i][j];
|
||||
else
|
||||
results[i] += 0;
|
||||
dftResults[i] += 0;
|
||||
}
|
||||
else if (padding == PaddingType::SIG_REPEAT) /* Repeat samples */
|
||||
results[i] += tmpSmpWindow[j % windowSize] * dftMatrix[i][j];
|
||||
dftResults[i] += tmpSmpWindow[j % windowSize] * dftMatrix[i][j];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* This function prepares the selected window coefficents
|
||||
*/
|
||||
void calculateWindow(enum WindowType windowTypeIn)
|
||||
{
|
||||
switch (windowTypeIn) {
|
||||
case WindowType::FLATTOP:
|
||||
for (unsigned i = 0; i < windowSize; i++) {
|
||||
filterWindowCoefficents[i] = 0.21557895
|
||||
- 0.41663158 * cos(2 * M_PI * i / (windowSize))
|
||||
filterWindowCoefficents[i] = 0.21557895
|
||||
- 0.41663158 * cos(2 * M_PI * i / (windowSize))
|
||||
+ 0.277263158 * cos(4 * M_PI * i / (windowSize))
|
||||
- 0.083578947 * cos(6 * M_PI * i / (windowSize))
|
||||
+ 0.006947368 * cos(8 * M_PI * i / (windowSize));
|
||||
|
|
@ -528,30 +490,6 @@ public:
|
|||
|
||||
windowCorretionFactor /= windowSize;
|
||||
}
|
||||
|
||||
/**
|
||||
* This function is calculating the mximum based on a quadratic interpolation
|
||||
*
|
||||
* This function is based on the following paper:
|
||||
* https://mgasior.web.cern.ch/pap/biw2004.pdf
|
||||
* https://dspguru.com/dsp/howtos/how-to-interpolate-fft-peak/
|
||||
* *
|
||||
* In particular equation 10
|
||||
*/
|
||||
Point quadraticEstimation(const Point &a, const Point &b, const Point &c, unsigned maxFBin)
|
||||
{
|
||||
// Frequency estimation
|
||||
double maxBinEst = (double) maxFBin + (c.y - a.y) / (2 * (2 * b.y - a.y - c.y));
|
||||
double y_Fmax = startFreqency + maxBinEst * frequencyResolution; // convert bin to frequency
|
||||
|
||||
// Amplitude estimation
|
||||
double f = (a.x * (b.y - c.y) + b.x * (c.y - a.y) + c.x * (a.y - b.y)) / ((a.x - b.x) * (a.x - c.x) * (c.x - b.x));
|
||||
double g = (pow(a.x, 2) * (b.y - c.y) + pow(b.x, 2) * (c.y - a.y) + pow(c.x, 2) * (a.y - b.y)) / ((a.x - b.x) * (a.x - c.x) * (b.x - c.x));
|
||||
double h = (pow(a.x, 2) * (b.x * c.y - c.x * b.y) + a.x * (pow(c.x, 2) * b.y - pow(b.x,2) * c.y)+ b.x * c.x * a.y * (b.x - c.x)) / ((a.x - b.x) * (a.x - c.x) * (b.x - c.x));
|
||||
double i = f * pow(y_Fmax,2) + g * y_Fmax + h;
|
||||
|
||||
return { y_Fmax, i };
|
||||
}
|
||||
};
|
||||
|
||||
/* Register hook */
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue