mirror of
https://git.rwth-aachen.de/acs/public/villas/node/
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108 lines
2.3 KiB
C++
108 lines
2.3 KiB
C++
/* Energy-based Metric hook.
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*
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* Author: Steffen Vogel <post@steffenvogel.de>
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* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <vector>
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#include <villas/hook.hpp>
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#include <villas/sample.hpp>
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#include <villas/timing.hpp>
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namespace villas {
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namespace node {
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class EBMHook : public Hook {
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protected:
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std::vector<std::pair<int, int>> phases;
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double energy;
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struct Sample *last;
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public:
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using Hook::Hook;
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virtual void parse(json_t *json) {
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int ret;
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size_t i;
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json_error_t err;
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json_t *json_phases, *json_phase;
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Hook::parse(json);
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ret = json_unpack_ex(json, &err, 0, "{ s: o }", "phases", &json_phases);
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if (ret)
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throw ConfigError(json, err, "node-config-hook-ebm");
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if (!json_is_array(json_phases))
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throw ConfigError(json_phases, "node-config-hook-ebm-phases");
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json_array_foreach(json_phases, i, json_phase) {
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int voltage, current;
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ret = json_unpack_ex(json_phase, &err, 0, "[ i, i ]", &voltage, ¤t);
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if (ret)
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throw ConfigError(json, err, "node-config-hook-ebm-phases");
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phases.emplace_back(voltage, current);
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}
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state = State::PARSED;
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}
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virtual void start() {
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assert(state == State::PREPARED);
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energy = 0;
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last = nullptr;
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state = State::STARTED;
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}
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virtual void periodic() {
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assert(state == State::STARTED);
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logger->info("Energy: {}", energy);
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}
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virtual Hook::Reason process(struct Sample *smp) {
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double P, P_last, dt;
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assert(state == State::STARTED);
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if (last) {
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for (auto phase : phases) {
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// Trapazoidal rule
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dt = time_delta(&last->ts.origin, &smp->ts.origin);
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P = smp->data[phase.first].f * smp->data[phase.second].f;
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P_last = last->data[phase.first].f * last->data[phase.second].f;
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energy += dt * (P_last + P) / 2.0;
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}
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sample_decref(last);
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}
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sample_incref(smp);
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last = smp;
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return Reason::OK;
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}
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};
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// Register hook
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static char n[] = "ebm";
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static char d[] = "Energy-based Metric";
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static HookPlugin<EBMHook, n, d,
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(int)Hook::Flags::PATH | (int)Hook::Flags::NODE_READ |
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(int)Hook::Flags::NODE_WRITE>
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p;
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} // namespace node
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} // namespace villas
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