Abstract
Inferential control system has many excellent performances such as disturbance resisting and set-point tracking, however, the application is restricted when strong load disturbance exists or stable control accuracy and response speed are highly required in the system. Feed-forward control system responds quickly to the system with measurable disturbance, but the control accuracy is easily affected by disturbance, so there will be a big error if the disturbance model is not accurate enough. Compound control algorithm which combines the feed-forward and inferential control algorithm is proposed in this paper. Feed-forward control algorithm is used to cancel the load- torque disturbance. Inferential control algorithm is used to cancel the error caused by soft sensing method. It is used to control the speed control of guide disc. The accuracy, robustness and fast response of the control system are proved by simulation.
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