hi All ,
im having problems trying to tune my controller , i can get it to go to steady state of any description.
basically im positioning a ping pong ball in a tube with a fan. the fan speed is controlled by a pwm stand alone controller excepting a 0/5v input from a 6008daq.
feed back is via web cam and the vision assistant colour matching.
when the ball over shoots setpoint the error is positive falling to set point once under setpoint error goes negative and controller into saturation , ive played with switching the integrator out but the response is two slow and if i turn up Kp in into saturation again. currently in trying to range the setpoint. and use gain scheduling
am i missing nothing ??
