lti.hpp

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// toolboxes/control/include/nk/control/lti/lti.hpp
//
// LTI (Linear Time-Invariant) system constructors. Each returns a
// nk struct value with a `kind` field tag ('tf', 'zpk', or 'ss')
// plus the canonical fields. Optional `Ts` field for discrete systems
// (>0); 0 means continuous-time.
 
#pragma once
 
#include <memory_resource>
#include <nk/value/value.hpp>
#include <tuple>
 
namespace nk::control {

 

Value tf(const Value &num, const Value &den, double Ts,
         std::pmr::memory_resource *mr = nullptr);

Value zpk(const Value &z, const Value &p, double k, double Ts,
          std::pmr::memory_resource *mr = nullptr);

Value ss(const Value &A, const Value &B, const Value &C, const Value &D,
        double Ts, std::pmr::memory_resource *mr = nullptr);

Value filt(const Value &num, const Value &den, double Ts,
           std::pmr::memory_resource *mr = nullptr);

Value frd(const Value &response, const Value &frequency, double Ts,
          std::pmr::memory_resource *mr = nullptr);

std::tuple<Value, Value>
frdata(const Value &sys, std::pmr::memory_resource *mr = nullptr);

std::tuple<Value, Value>
tfdata(const Value &sys, bool asVector, std::pmr::memory_resource *mr = nullptr);

std::tuple<Value, Value, Value>
zpkdata(const Value &sys, bool asVector, std::pmr::memory_resource *mr = nullptr);

std::tuple<Value, Value, Value, Value>
ssdata(const Value &sys, std::pmr::memory_resource *mr = nullptr);

Value ss2ss(const Value &sys, const Value &T,
            std::pmr::memory_resource *mr = nullptr);
 

} // namespace nk::control