Filter emg 7-10-15 v1
Dependencies: HIDScope mbed MODSERIAL
Filterdesigns.cpp
- Committer:
- Bartvaart
- Date:
- 2015-10-07
- Revision:
- 9:1655d67d8a53
- Parent:
- 7:040591b3f019
- Child:
- 10:897db0bdb2fe
File content as of revision 9:1655d67d8a53:
#include "Filterdesigns.h" #include "Filter.h" // Inputwaardes // Filter1a: 50Hz Notch double v1_50a = 0, v2_50a = 0; const double a1_50a = -1.56858163817, a2_50a = 0.96424138921; const double b0_50a = 1.00000000000, b1_50a = -1.61854514265, b2_50a = 1.00000000000; const double gain_50a = 1.000000; // Filter1b: 50Hz Notch double v1_50b = 0, v2_50b = 0; const double a1_50b = -1.61100357834, a2_50b = 0.96592171046; const double b0_50b = 1.00000000000, b1_50b = -1.61854514265, b2_50b = 1.00000000000; const double gain_50b = 0.965081; // Filter1: 20Hz HighPass double v1_HP = 0, v2_HP = 0; const double a1_HP = -0.76475499450, a2_HP = 0.27692273367; const double b0_HP = 1.00000000000, b1_HP = -2.00000000000, b2_HP = 1.00000000000; const double gain_HP = 0.510419; // Filter1: 5Hz LowPass double v1_LP = 0, v2_LP = 0; const double a1_LP = -1.16338171052, a2_LP = 0.42191097989; const double b0_LP = 1.00000000000, b1_LP = 2.00000000000, b2_LP = 1.00000000000; const double gain_LP = 0.064632; // constante variabelen: double gem = 0.4557; // gemiddelde waarde emgsignaal void Filterdesign1(double u, double &y) { //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); // High Pass filter. Tot 20Hz wordt weggefliterd double yHP = Filter(y50b, v1_HP, v2_HP, a1_HP, a2_HP, b0_HP, b1_HP, b2_HP, gain_HP); // Absolute waarde wordt genomen. double y1 = fabs(yHP); // Low Pass filter. Alles vanaf 5Hz wordt weggefilterd double yLP = Filter(y1, v1_LP, v2_LP, a1_LP, a2_LP, b0_LP, b1_LP, b2_LP, gain_LP); y = 10 * yLP; }