A DC Speed ​​Control System Combining Predictive Pi Algorithm and Combined Integral Link

Abstract

The invention provides a direct-current speed regulation system where a prediction PI algorithm and a combined integral link are combined. The system is characterized in that the system comprises the combined integral link and a prediction PI controller which are connected in series; an input voltage signal is filtered through the combined integral link so that the input voltage signal can ascend uniformly; an output signal of the combined integral link is conveyed to the prediction PI controller, an output signal of the prediction PI controller is conveyed to a direct-current motor, and an output value of the direct-current motor is fed back to the input end of the prediction PI controller. The control strategy where the combined integral link and the prediction PI algorithm are combined, average filtering is performed on an input signal so that a deviation voltage can not become large suddenly in the starting process, and a current limiting effect is achieved; the prediction PI controller can effectively control the stable and dynamic performance of the system. On the basis of current limiting protection, rapidity of the system is obviously improved, the stable performance and the anti-interference capacity of the system are excellent, and meanwhile the anti-interference capacity and robustness are high.

Description

technical field [0001] The invention relates to the technical field of motion control systems, in particular to a DC speed regulation system combining a predictive PI algorithm and a combined integral link. Background technique [0002] In modern industrial production, a large number of mechanical equipment are required to be able to change the speed of work in a timely and accurate manner. For example, the required speed of a subway train is different when it leaves the station, enters the station, and is running. Another example is printing machinery, which requires an appropriate speed according to the type and thickness of the selected material. Since the DC motor has good starting and speed regulation performance, it can meet the requirements of smooth speed regulation in a wide range. Although high-performance AC speed regulation technology has developed rapidly recently, DC speed regulation has only been gradually replaced in some fields with low speed regulation per...

AI Technical Summary

Problems solved by technology

[0008] (2) The parameters of the traditional PI have no direct-viewing actual physical meaning, and are suitable for situations where the control requirements are not high. For some controlled objects with time-delay links and integral characteristics, it is difficult to meet the requirements by using PID and PI algorithm control The control effect

Therefore, this link has no inhibitory effect on the speed change caused by sudden load changes, and its immunity is weak. As a practical speed control system, its dynamic performance is far from meeting the control requirements.

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