digital_lp_filter< T > Class Template Reference

#include <filters.h>

Inheritance diagram for digital_lp_filter< T >:

Collaboration diagram for digital_lp_filter< T >:

Public Member Functions
	digital_lp_filter (T w_c, T t_s)
virtual	~digital_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 digital_lp_filter< T >

Definition at line 33 of file filters.h.

Constructor & Destructor Documentation

template<typename T >

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

Definition at line 101 of file filters.cpp.

                                                    {
  Lpf_in_prev[0] = Lpf_in_prev[1] = 0;
  Lpf_out_prev[0] = Lpf_out_prev[1] = 0;
  Lpf_in1 = 0, Lpf_in2 = 0, Lpf_in3 = 0, Lpf_out1 = 0, Lpf_out2 = 0;
  float den = 2500 * t_s * t_s * w_c * w_c + 7071 * t_s * w_c + 10000;

  Lpf_in1 = 2500 * t_s * t_s * w_c * w_c / den;
  Lpf_in2 = 5000 * t_s * t_s * w_c * w_c / den;
  Lpf_in3 = 2500 * t_s * t_s * w_c * w_c / den;
  Lpf_out1 = -(5000 * t_s * t_s * w_c * w_c - 20000) / den;
  Lpf_out2 = -(2500 * t_s * t_s * w_c * w_c - 7071 * t_s * w_c + 10000) / den;
}

template<typename T >

digital_lp_filter< T >::~digital_lp_filter ( void  )

virtual

Definition at line 115 of file filters.cpp.

{}

Member Function Documentation

template<typename T >

void digital_lp_filter< T >::clear ( void  )

virtual

Implements filter< T >.

Definition at line 135 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 digital_lp_filter< T >::input ( T  input_value )

virtual

Implements filter< T >.

Definition at line 118 of file filters.cpp.

                                         {
  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
  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;
}

template<typename T >

T digital_lp_filter< T >::output ( void  )

virtual

Implements filter< T >.

Definition at line 130 of file filters.cpp.

                                   {
  return lpf_out;
}

Member Data Documentation

template<typename T >

T digital_lp_filter< T >::Lpf_in1

private

Definition at line 44 of file filters.h.

template<typename T >

T digital_lp_filter< T >::Lpf_in2

private

Definition at line 44 of file filters.h.

template<typename T >

T digital_lp_filter< T >::Lpf_in3

private

Definition at line 44 of file filters.h.

template<typename T >

T digital_lp_filter< T >::Lpf_in_prev[2]

private

Definition at line 42 of file filters.h.

template<typename T >

T digital_lp_filter< T >::lpf_out

private

Definition at line 45 of file filters.h.

template<typename T >

T digital_lp_filter< T >::Lpf_out1

private

Definition at line 44 of file filters.h.

template<typename T >

T digital_lp_filter< T >::Lpf_out2

private

Definition at line 44 of file filters.h.

template<typename T >

T digital_lp_filter< T >::Lpf_out_prev[2]

private

Definition at line 43 of file filters.h.

---

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

• filters.h
• filters.cpp