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nature : be transferred by the deviation parameters to adjust the system. The production control process widely used type of a conditioning systems. One of its features to enable interference-parameter changes after regulators before a regulatory role, so be transferred back to the parameters set value, not as feedforward regulation, as long as an interference into the system, though they are also the end-parameter changes, feedforward regulator (feedforward compensation device) on regulatory role. Another new feature is entering the system parameters were transferred impact of interference caused by the impact could overcome, and the former can overcome regulatory fed into the feed-forward regulation of interference. Therefore, the feedback system to be more precise adjustment, the result of adjustments to be tested through feedback, but for those who lag behind large objects regulation, regulation is often not timely, regulating the process of a larger deviation, error lasted for a long time, the feedback control system of the structure shown in the figure.
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