vibration.hpp

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// toolboxes/signal/include/nk/signal/measurements/vibration.hpp
//
// Vibration analysis — envelope spectrum, tachometer → RPM, rainflow
// cycle counting, time-synchronous averaging.
 
#pragma once
 
#include <memory_resource>
#include <nk/value/value.hpp>
 
#include <tuple>
 
namespace nk::signal {

 

std::tuple<Value, Value>
envspectrum(const Value &                x,
            double                       fs = 0.0,
            std::pmr::memory_resource *  mr = nullptr);

std::tuple<Value, Value>
tachorpm(const Value &                x,
         double                       fs,
         const Value &                threshold = Value::Empty,
         int                          ppr       = 1,
         std::pmr::memory_resource *  mr        = nullptr);

Value rainflow(const Value &                x,
               std::pmr::memory_resource *  mr = nullptr);

std::tuple<Value, Value>
tsa(const Value &                x,
    double                       fs,
    const Value &                rpm,
    double                       fs_rpm,
    int                          n_per_rev = 1024,
    std::pmr::memory_resource *  mr        = nullptr);
 

} // namespace nk::signal