BA / Mbed OS BaBoRo1

Erste version der Software für der Prototyp

LowpassFilter.h@4:75df35ef4fb6, 2018-03-30 (annotated)

Committer:
borlanic
Date:
Fri Mar 30 14:07:05 2018 +0000
Revision:
4:75df35ef4fb6
Parent:
0:380207fcb5c1 
commentar

Who changed what in which revision?

UserRevisionLine numberNew contents of line
borlanic 0:380207fcb5c1 1 /*
borlanic 0:380207fcb5c1 2 * LowpassFilter.h
borlanic 0:380207fcb5c1 3 * Copyright (c) 2018, ZHAW
borlanic 0:380207fcb5c1 4 * All rights reserved.
borlanic 0:380207fcb5c1 5 */
borlanic 0:380207fcb5c1 6
borlanic 0:380207fcb5c1 7 #ifndef LOWPASS_FILTER_H_
borlanic 0:380207fcb5c1 8 #define LOWPASS_FILTER_H_
borlanic 0:380207fcb5c1 9
borlanic 0:380207fcb5c1 10 #include <cstdlib>
borlanic 0:380207fcb5c1 11
borlanic 0:380207fcb5c1 12 /**
borlanic 0:380207fcb5c1 13 * This class implements a time-discrete 2nd order lowpass filter for a series of data values.
borlanic 0:380207fcb5c1 14 * This filter can typically be used within a periodic task that takes measurements that need
borlanic 0:380207fcb5c1 15 * to be filtered, like speed or position values.
borlanic 0:380207fcb5c1 16 */
borlanic 0:380207fcb5c1 17 class LowpassFilter {
borlanic 0:380207fcb5c1 18
borlanic 0:380207fcb5c1 19 public:
borlanic 0:380207fcb5c1 20
borlanic 0:380207fcb5c1 21 LowpassFilter();
borlanic 0:380207fcb5c1 22 virtual ~LowpassFilter();
borlanic 0:380207fcb5c1 23 void reset();
borlanic 0:380207fcb5c1 24 void reset(float value);
borlanic 0:380207fcb5c1 25 void setPeriod(float period);
borlanic 0:380207fcb5c1 26 void setFrequency(float frequency);
borlanic 0:380207fcb5c1 27 float getFrequency();
borlanic 0:380207fcb5c1 28 float filter(float value);
borlanic 0:380207fcb5c1 29
borlanic 0:380207fcb5c1 30 private:
borlanic 0:380207fcb5c1 31
borlanic 0:380207fcb5c1 32 float period;
borlanic 0:380207fcb5c1 33 float frequency;
borlanic 0:380207fcb5c1 34 float a11, a12, a21, a22, b1, b2;
borlanic 0:380207fcb5c1 35 float x1, x2;
borlanic 0:380207fcb5c1 36 };
borlanic 0:380207fcb5c1 37
borlanic 0:380207fcb5c1 38 #endif /* LOWPASS_FILTER_H_ */
borlanic 0:380207fcb5c1 39
borlanic 0:380207fcb5c1 40