Abstract
A partial-state and an output feedback control system synthesis method with feed-forward compensation, which doesn't make use of the state observer procedure, are proposed. These are applied to an efficiency-optimized speed control system of a dc motor system. This leads to a decrease in the number of current detectors of the motor system and the channel of the A/D converter. Although they are useful in practice, these control systems are, to some extent, susceptible to noise due to the inclusion of high-order difference actions in the controller. It is inevitable that the transient response becomes slow if the weighting factors in the performance index are chosen so that the influence of noise is decreased. The feed-forward compensation is useful for improvement on the transient response of the control system. But, the feed-forward compensation method for the partial-state or the output feedback control system has not been proposed until now. In this paper, the feed-forward compensation method, which can be applied to all the control systems, is proposed and the effectiveness is examined experimentally. Also, the influence of noise for each control system and the improvement of the efficiency are investigated experimentally.
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