deriv_lp_filter< T > Class Template Reference

#include <filters.h>

Inheritance diagram for deriv_lp_filter< T >:

Collaboration diagram for deriv_lp_filter< T >:

Public Member Functions
	deriv_lp_filter (T w_c, T t_s)
virtual	~deriv_lp_filter (void)
virtual void	input (T input_value)
virtual T	output (void)
virtual void	clear (void)
Public Member Functions inherited from filter< T >
	filter (void)
virtual	~filter (void)

Private Attributes
T	Lpf_in_prev [2]
T	Lpf_out_prev [2]
T	Lpf_in1
T	Lpf_in2
T	Lpf_in3
T	Lpf_out1
T	Lpf_out2
T	lpf_out

Detailed Description

template<typename T>
class deriv_lp_filter< T >

Definition at line 65 of file filters.h.

Constructor & Destructor Documentation

template<typename T >

deriv_lp_filter< T >::deriv_lp_filter	(	T	w_c,
		T	t_s
	)

Definition at line 148 of file filters.cpp.

References moving_average_filter< T >::clear().

                                                {
  Lpf_in_prev[0] = 0;
  Lpf_in_prev[1] = 0;
  Lpf_out_prev[0] = 0;
  Lpf_out_prev[1] = 0;
  Lpf_in1 = 0;
  Lpf_in2 = 0;
  Lpf_in3 = 0;
  Lpf_out1 = 0;
  Lpf_out2 = 0;
  T a = 1.4142;
  T den = 4 + 2 * a * w_c * t_s + t_s * t_s * w_c * w_c;

  Lpf_in1 = 2 * t_s * w_c * w_c / den;
  Lpf_in2 = 0;
  Lpf_in3 = -2. * t_s * w_c * w_c / den;
  Lpf_out1 = -1. * (-8 + t_s * t_s * w_c * w_c * 2) / den;
  Lpf_out2 = -1. * (4 - 2 * a * w_c * t_s + t_s * t_s * w_c * w_c) / den;
  lpf_out = 0.0;
  clear();
}

Here is the call graph for this function:

template<typename T >

deriv_lp_filter< T >::~deriv_lp_filter ( void  )

virtual

Definition at line 171 of file filters.cpp.

{}

Member Function Documentation

template<typename T >

void deriv_lp_filter< T >::clear ( void  )

virtual

Implements filter< T >.

Definition at line 204 of file filters.cpp.

                                   {
  Lpf_in_prev[1] = 0;
  Lpf_in_prev[0] = 0;
  Lpf_out_prev[1] = 0;
  Lpf_out_prev[0] = 0;
}

template<typename T >

void deriv_lp_filter< T >::input ( T  input_value )

virtual

Implements filter< T >.

Definition at line 174 of file filters.cpp.

                                       {
  // static int i(0);
  lpf_out = Lpf_in1 * lpf_in + Lpf_in2 * Lpf_in_prev[0] +
            Lpf_in3 * Lpf_in_prev[1] +  // input component
            Lpf_out1 * Lpf_out_prev[0] +
            Lpf_out2 * Lpf_out_prev[1];  // output component

  // printf("%i th filter (%f): %f, %f, %f, %f, %f, %f, %f, %f, %f, %f\n",i,
  //        lpf_out,
  //        Lpf_in1, lpf_in, Lpf_in2,
  //        Lpf_in_prev[0], Lpf_in3, Lpf_in_prev[1],
  //        Lpf_out1, Lpf_out_prev[0], Lpf_out2, Lpf_out_prev[1]);

  // if(lpf_out>100){
  //     exit(0);
  // }

  Lpf_in_prev[1] = Lpf_in_prev[0];
  Lpf_in_prev[0] = lpf_in;
  Lpf_out_prev[1] = Lpf_out_prev[0];
  Lpf_out_prev[0] = lpf_out;
  // ++i;
}

template<typename T >

T deriv_lp_filter< T >::output ( void  )

virtual

Implements filter< T >.

Definition at line 199 of file filters.cpp.

                                 {
  return lpf_out;
}

Member Data Documentation

template<typename T >

T deriv_lp_filter< T >::Lpf_in1

private

Definition at line 76 of file filters.h.

template<typename T >

T deriv_lp_filter< T >::Lpf_in2

private

Definition at line 76 of file filters.h.

template<typename T >

T deriv_lp_filter< T >::Lpf_in3

private

Definition at line 76 of file filters.h.

template<typename T >

T deriv_lp_filter< T >::Lpf_in_prev[2]

private

Definition at line 74 of file filters.h.

template<typename T >

T deriv_lp_filter< T >::lpf_out

private

Definition at line 77 of file filters.h.

template<typename T >

T deriv_lp_filter< T >::Lpf_out1

private

Definition at line 76 of file filters.h.

template<typename T >

T deriv_lp_filter< T >::Lpf_out2

private

Definition at line 76 of file filters.h.

template<typename T >

T deriv_lp_filter< T >::Lpf_out_prev[2]

private

Definition at line 75 of file filters.h.

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The documentation for this class was generated from the following files:

• filters.h
• filters.cpp