File content as of revision 14:371e0d505971:

#include "Filterdesigns.h"
#include "Filter.h"
#include "Meanvalue.h"

// Inputwaardes


//Notch 50Hz

// Filter1a: 50Hz Notch
double v1_50a = 0, v2_50a = 0;
const double a1_50a = -4.45616687966, a2_50a = 0.0;
const double b0_50a = 1.00000000000, b1_50a = -4.45738754850, b2_50a = 0.0;
const double gain_50a = 1.000000;

// Filter1b: 50Hz Notch
double v1_50b = 0, v2_50b = 0;
const double a1_50b = 6.24687974012, a2_50b = 9.75279168287;
const double b0_50b = 1.00000000000, b1_50b = 6.24687974012, b2_50b = 9.75587662190;
const double gain_50b = 1.0;

// Filter1c: 50Hz Notch
double v1_50c = 0, v2_50c = 0;
const double a1_50c = -1.93135518860, a2_50c = 0.93135518860;
const double b0_50c = 1.00000000000, b1_50c = -1.93013451976, b2_50c = 0.931354816092;
const double gain_50c = 1.0;


//HighPass 20Hz

// Filter2a: 20Hz HighPass
double v1_HPa = 0, v2_HPa = 0;
const double a1_HPa = 1.64732093404, a2_HPa = 0.0;
const double b0_HPa = 1.00000000000, b1_HPa = 1.67405904258, b2_HPa = 0.00000000000;
const double gain_HPa = 1.0;

// Filter2b: 20Hz HighPass
double v1_HPb = 0, v2_HPb = 0;
const double a1_HPb = -1.70079715112, a2_HPb = 0.70079715112;
const double b0_HPb = 1.00000000000, b1_HPb = -1.67405904258, b2_HPb = 0.70079715112;
const double gain_HPb = 1.0;


//LowPass 3Hz

// Filter3a: 3Hz LowPass
double v1_LPa = 0, v2_LPa = 0;
const double a1_LPa = 1.94667622076, a2_LPa = 0.00000000000;
const double b0_LPa = 1.00000000000, b1_LPa = -0.00034631471, b2_LPa = 0.00000000000;
const double gain_LPa = 1.00000000000;

// Filter3b: 3Hz LowPass
double v1_LPb = 0, v2_LPb = 0;
const double a1_LPb = -1.94667622076, a2_LPb = 0.94806147959;
const double b0_LPb = 1.00000000000, b1_LPb = -0.00103894412, b2_LPb = 0.00000023987;
const double gain_LPb = 1.0;



// constante variabelen:

double gem = 0.4557; // gemiddelde waarde emgsignaal

//gemiddelde bepalen
double sum = 0;
int a = 0;
int delay = 40;
int samples_length = 10;


void Filterdesigns(double u, double &y, double &ymean)
{
    //u = input waarde
    //y = output waarde

    u = u - gem; // lees waarde van emg signaal uit

    // Op deze manier worden de waardes ingelezen in Filter. Zorg dus voor dezelfde volgorde, zodat de waardes goed uitgelezen worden!:
    // Filter(double u, double &v1, double &v2, const double a1, const double a2, const double b0, const double b1, const double b2, const double gain)

    // 50Hz Notch filter
    double y50a = Filter(u, v1_50a, v2_50a, a1_50a, a2_50a, b0_50a, b1_50a, b2_50a, gain_50a);
    double y50b = Filter(y50a, v1_50b, v2_50b, a1_50b, a2_50b, b0_50b, b1_50b, b2_50b, gain_50b);
    double y50c = Filter(y50b, v1_50c, v2_50c, a1_50c, a2_50c, b0_50c, b1_50c, b2_50c, gain_50c);

    // High Pass filter. Tot 20Hz wordt weggefliterd
    double yHPa = Filter(y50c, v1_HPa, v2_HPa, a1_HPa, a2_HPa, b0_HPa, b1_HPa, b2_HPa, gain_HPa);
    double yHPb = Filter(yHPa, v1_HPb, v2_HPb, a1_HPb, a2_HPb, b0_HPb, b1_HPb, b2_HPb, gain_HPb);

    // Absolute waarde wordt genomen.
    double y1 = fabs(yHPb);

    // Low Pass filter. Alles vanaf 5Hz wordt weggefilterd
    double yLPa = Filter(y1, v1_LPa, v2_LPa, a1_LPa, a2_LPa, b0_LPa, b1_LPa, b2_LPa, gain_LPa);
    double yLPb = Filter(yLPa, v1_LPb, v2_LPb, a1_LPb, a2_LPb, b0_LPb, b1_LPb, b2_LPb, gain_LPb);

    y = yLPb;

    ymean = Meanvalue(y, sum, a, ymean, delay);
    //ymean = Meansmooth(y, samples_length, ymean);

}