Revision 0:3d03a93d9671, committed 2018-05-16

Comitter:

ckalintra

Date:

Wed May 16 10:27:33 2018 +0000

Commit message:

PID

Changed in this revision

diff -r 000000000000 -r 3d03a93d9671 PID.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PID.cpp	Wed May 16 10:27:33 2018 +0000
@@ -0,0 +1,18 @@
+#include "PID.h"
+#define Kp 0.1
+#define Ki 0.00001
+
+void PID::control(float x, float *output, float time, float integral)
+{
+    float error = - x;
+    float Pout = Kp * error;//multiply the error with kp to get P output
+
+    integral += error * time;//integral adds the previous error + the error now * time the error presist
+    
+    float Iout = Ki * integral;//multiply by Ki
+    output[0] = Pout + Iout;
+    if( output[0] > 1 )//limit the output
+        {output[0] = 1;}
+    else if( output[0] < -1 )
+        {output[0] = -1;}
+}
\ No newline at end of file

diff -r 000000000000 -r 3d03a93d9671 PID.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PID.h	Wed May 16 10:27:33 2018 +0000
@@ -0,0 +1,20 @@
+#ifndef PID_H
+#define PID_H
+
+#include "mbed.h"
+
+extern Serial pc;
+
+class PID
+{
+    protected:
+    public: 
+    /*x = error
+    output = PID output
+    time = time since last pid is run
+    //integral = sum of all previous error
+    */
+   void control(float x, float *output, float time, float integral);
+};
+
+#endif
\ No newline at end of file