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Dependencies:   HIDScope MODSERIAL QEI TextLCD mbed

Filterdesigns.cpp@29:9610df479f89, 2015-10-17 (annotated)

Committer:
RemcoDas
Date:
Sat Oct 17 14:13:57 2015 +0000
Revision:
29:9610df479f89
Parent:
21:8fe8419de3e9
Child:
30:8ae855348d22
EMG haalt links en rechts door elkaar, komt wrs door filterdisigns.cpp en filter.cpp

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bartvaart 5:b400209df739 1 #include "Filterdesigns.h"
Bartvaart 6:8197f9446daf 2 #include "Filter.h"
Bartvaart 6:8197f9446daf 3
Bartvaart 7:040591b3f019 4 // Inputwaardes
Bartvaart 13:b01231e0b743 5 //Notch 50Hz
Bartvaart 13:b01231e0b743 6
Bartvaart 7:040591b3f019 7 // Filter1a: 50Hz Notch
Bartvaart 6:8197f9446daf 8 double v1_50a = 0, v2_50a = 0;
Bartvaart 15:c1a8f28d6583 9 const double a1_50a = -1.52337295428, a2_50a = 0.93195385841;
Bartvaart 15:c1a8f28d6583 10 const double b0_50a = 1.00000000000, b1_50a = -1.61854514929, b2_50a = 1.0;
Bartvaart 6:8197f9446daf 11 const double gain_50a = 1.000000;
Bartvaart 6:8197f9446daf 12
Bartvaart 6:8197f9446daf 13 // Filter1b: 50Hz Notch
Bartvaart 6:8197f9446daf 14 double v1_50b = 0, v2_50b = 0;
Bartvaart 15:c1a8f28d6583 15 const double a1_50b = -1.60486796113, a2_50b = 0.93780356783;
Bartvaart 15:c1a8f28d6583 16 const double b0_50b = 1.00000000000, b1_50b = -1.61854514929, b2_50b = 1.0;
Bartvaart 15:c1a8f28d6583 17 const double gain_50b = 0.934872;
Bartvaart 6:8197f9446daf 18
Bartvaart 13:b01231e0b743 19 //HighPass 20Hz
Bartvaart 13:b01231e0b743 20
Bartvaart 13:b01231e0b743 21 // Filter2a: 20Hz HighPass
Bartvaart 15:c1a8f28d6583 22 double v1_HP = 0, v2_HP = 0;
Bartvaart 21:8fe8419de3e9 23 const double a1_HP = -0.76475499450, a2_HP = 0.27692273367;
Bartvaart 21:8fe8419de3e9 24 const double b0_HP = 1.00000000000, b1_HP = -2.0, b2_HP = 1.00000000000;
Bartvaart 21:8fe8419de3e9 25 const double gain_HP = 0.510419;
Bartvaart 6:8197f9446daf 26
Bartvaart 13:b01231e0b743 27 //LowPass 3Hz
Bartvaart 13:b01231e0b743 28
Bartvaart 13:b01231e0b743 29 // Filter3a: 3Hz LowPass
Bartvaart 15:c1a8f28d6583 30 double v1_LP = 0, v2_LP = 0;
Bartvaart 15:c1a8f28d6583 31 const double a1_LP = -1.93503824887, a2_LP = 0.93708289663;
Bartvaart 15:c1a8f28d6583 32 const double b0_LP = 1.00000000000, b1_LP = 2.0, b2_LP = 1.00000000000;
Bartvaart 15:c1a8f28d6583 33 const double gain_LP = 0.000511;
Bartvaart 6:8197f9446daf 34
Bartvaart 6:8197f9446daf 35 // constante variabelen:
Bartvaart 6:8197f9446daf 36
Bartvaart 17:cfe44346645c 37 double y=0;
Bartvaart 6:8197f9446daf 38
RemcoDas 29:9610df479f89 39 double Filterdesigns(double u){
Bartvaart 5:b400209df739 40 //u = input waarde
Bartvaart 5:b400209df739 41 //y = output waarde
Bartvaart 16:8f175d2a472f 42
Bartvaart 5:b400209df739 43 // Op deze manier worden de waardes ingelezen in Filter. Zorg dus voor dezelfde volgorde, zodat de waardes goed uitgelezen worden!:
Bartvaart 5:b400209df739 44 // 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)
Bartvaart 6:8197f9446daf 45
Bartvaart 5:b400209df739 46 // 50Hz Notch filter
Bartvaart 5:b400209df739 47 double y50a = Filter(u, v1_50a, v2_50a, a1_50a, a2_50a, b0_50a, b1_50a, b2_50a, gain_50a);
Bartvaart 5:b400209df739 48 double y50b = Filter(y50a, v1_50b, v2_50b, a1_50b, a2_50b, b0_50b, b1_50b, b2_50b, gain_50b);
Bartvaart 6:8197f9446daf 49
Bartvaart 5:b400209df739 50 // High Pass filter. Tot 20Hz wordt weggefliterd
Bartvaart 21:8fe8419de3e9 51 double yHP = Filter(u, v1_HP, v2_HP, a1_HP, a2_HP, b0_HP, b1_HP, b2_HP, gain_HP);
Bartvaart 6:8197f9446daf 52
Bartvaart 5:b400209df739 53 // Absolute waarde wordt genomen.
Bartvaart 15:c1a8f28d6583 54 double y1 = fabs(yHP);
Bartvaart 6:8197f9446daf 55
Bartvaart 6:8197f9446daf 56 // Low Pass filter. Alles vanaf 5Hz wordt weggefilterd
Bartvaart 15:c1a8f28d6583 57 double yLP = Filter(y1, v1_LP, v2_LP, a1_LP, a2_LP, b0_LP, b1_LP, b2_LP, gain_LP);
Bartvaart 6:8197f9446daf 58
Bartvaart 16:8f175d2a472f 59 y = 10 * yLP;
Bartvaart 17:cfe44346645c 60
Bartvaart 17:cfe44346645c 61 return y;
Bartvaart 5:b400209df739 62 }