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A Limiting Differential Control Method

A differential control and limiting technology, applied in the field of control, can solve problems such as difficult to find the balance point of parameter debugging, and achieve the effect of simple and fast debugging, simple and convenient debugging, and good control effect

Inactive Publication Date: 2021-12-24
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is difficult to find the balance point of parameter debugging on site

Method used

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Embodiment Construction

[0027] The invention proposes a limiting differential control method aiming at the deficiencies existing when the differential controller adopting inertial filtering and output limiting is applied to the control of objects with large inertia, large lag and strong interference. The limited differential control method can limit the variation range of the differential controller output within a reasonable range by adjusting the inertia time in the actual differential link in a closed loop under the condition that the total differential control effect remains unchanged. When the input signal changes slowly and the variation range of the differential control output is small, the limiting differential controller is no different from the traditional actual differential controller; when the input signal changes rapidly and the variation range of the differential control output is large, the limiting differential controller The output of the controller will be limited within a reasonabl...

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Abstract

A limited differential control method, which is used to improve the control quality of a controlled object with large inertia, large lag, and its technical solution is that the method uses a limited differential controller to control the controlled object, when the limited differential controller When the output of the limiting differential controller is less than or equal to the limiting value, the output of the limiting differential controller is not limited; when the output of the limiting differential controller is greater than the limiting value, while limiting the output of the limiting differential controller, the The inertia time in the differential link is adjusted in a closed loop. By increasing the differential control inertia time, the differential output amplitude is reduced and the total differential control quantity remains unchanged. The present invention controls the differential output within a reasonable range under the condition of keeping the total differential control effect unchanged, and the control effect is obvious in the control system with large lag, large inertia object and dynamic compensation that requires large differential action It is superior to the traditional differential control method. The physical meaning of each parameter of the invention is clear, and the on-site debugging is simple and quick.

Description

technical field [0001] The invention relates to a differential control method suitable for a controlled object with large inertia, large lag and strong interference, and belongs to the technical field of control. Background technique [0002] The most widely used controller in process control is the PID (proportional, integral, differential) controller. Especially for the controlled object with large inertia and large lag, it is necessary to rely on differential control to reflect the changing trend of the controlled parameters in advance and adjust the phase advance characteristics to speed up the adjustment process, improve the control quality of parameters and the closed-loop stability of the system. In addition, for the controlled object without self-balancing ability, the differential control effect is equivalent to the proportional control effect in the control system of the controlled object with self-balancing ability, and increasing the effect of differential contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/36
CPCG05B11/36
Inventor 田亮刘海喆葛维春邓拓宇刘鑫屏罗桓桓周桂平李斌苏安龙葛延锋刘淼孙明一吴南耿莉娜马一菱
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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