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PI regulator for suppressing overshoot and control method

A control method and regulator technology, applied in control systems, control generators, vector control systems, etc., can solve problems such as large overshoot and reduced system stability

Pending Publication Date: 2021-02-26
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for applications with high dynamic performance requirements, once the dynamic adjustment speed is increased, it will cause problems such as excessive overshoot and reduced system stability.

Method used

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  • PI regulator for suppressing overshoot and control method
  • PI regulator for suppressing overshoot and control method
  • PI regulator for suppressing overshoot and control method

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Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] As described in the background, the inventors have found that once the dynamic adjustment speed of the existing PI regulator is increased, the problem of excessive overshoot and reduced system stability will occur.

[0036] Specifically, the existing PI regulator can perform overshoot control in the following manner:

[0037] Method 1 proposes using a tracking differentiator to arrange a transition process for a given step to achieve no-overshoot control, but there is a problem of complex parameter adjustment.

[0038] Method 2 uses output differential negative feedback to eliminate overshoot. However, output differential will introduce noise and affect system performance.

[0039] Method three, in order to suppress the noise, ...

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Abstract

The invention provides a PI regulator for suppressing overshoot and a control method. The PI regulator comprises a feed-forward filter and a first PI regulator. The input end of the feed-forward filter receives a reference given signal of the PI regulator, an output signal of the first regulator and a feed-forward signal of the PI regulator are input to a transfer function of a controlled object,and an output signal of the feed-forward filter and an output signal of the transfer function are input to the first PI regulator. Visibly, according to the PI regulator for suppressing overshoot, thefeed-forward filter is connected to the given reference signal in series, the tracking response of the given reference signal is improved by providing the additional tuning parameter b and the filtering cut-off frequency omegac, besides, the tuning parameter b can adjust the amplitude of the overshoot, and the filtering cut-off frequency omegac can adjust the time required by dynamic adjustment;and thus, the dynamic adjustment speed and the system stability are improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor current loop and speed loop control, in particular to a PI regulator for suppressing overshoot and a control method. Background technique [0002] PI regulator is a kind of linear controller, which forms the control deviation according to the given value and the actual output value, and forms the control quantity through linear combination of the proportion and integral of the deviation, and controls the controlled object. It is suitable for controlled objects with large inertia and large hysteresis characteristics, such as permanent magnet synchronous motor current loop control and speed loop control. However, for applications with high dynamic performance requirements, once the dynamic adjustment speed is increased, the problem of excessive overshoot and reduced system stability will be brought about. [0003] Therefore, how to provide a PI regulator that suppresses o...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/22
CPCH02P21/0003H02P21/22
Inventor 高乐孙楠楠陈文淼赵强
Owner WEICHAI POWER CO LTD