A Method for Improvement of a Position Control with Analog Signal

In this paper, we propose a method for improving a position control using sliding mode. For industrial equipments, a pulse encoder is generally used for measurement of a position, but the position is not stable by quantization errors which fluctuate between a resolution of the pulse encoder. It is known that this problem can be solved by an analog clamp method that uses two analog sinusoidal signals. However, transmission quantity increases if the analog signals are passed on serial transmission. Therefore, we propose an analog clamp controller judging of a control condition on an sliding mode plane. Effectiveness of the proposed method is confirmed by experiments.