All,
I am looking for an algorithm to control a heavy shuttle car on rails controlled by a VFD (132kW). The general theory is understood, the shuttle position is controlled remarkably well over long distance +/- 0.1 meters but in short distances (0.2 to 1.0 m) it overshoots > 0.2 m ... although 0.2 m of error might seem negligibly, if the travel distance is 0.2 m, the system will be overshooting by 100% of the controlled distance.
I am looking for a command generation algorithm that continuously up date the distance to target and interpolate velocity calculations base on maximum acceleration/deceleration, distance to target and maximum velocity … The algorithm I am using (base on the Newton formulas) is not lineal, specially at short distances to the target … I am using a Allen-Bradley CLx to calculate and send the reference signal to the VFD.
Thanks in advance.
LJAM
I am looking for an algorithm to control a heavy shuttle car on rails controlled by a VFD (132kW). The general theory is understood, the shuttle position is controlled remarkably well over long distance +/- 0.1 meters but in short distances (0.2 to 1.0 m) it overshoots > 0.2 m ... although 0.2 m of error might seem negligibly, if the travel distance is 0.2 m, the system will be overshooting by 100% of the controlled distance.
I am looking for a command generation algorithm that continuously up date the distance to target and interpolate velocity calculations base on maximum acceleration/deceleration, distance to target and maximum velocity … The algorithm I am using (base on the Newton formulas) is not lineal, specially at short distances to the target … I am using a Allen-Bradley CLx to calculate and send the reference signal to the VFD.
Thanks in advance.
LJAM