Saturated self-adjusting controller for time-varying delay uncertain system

A time-varying time-delay, self-adjusting technology, applied in the field of control, can solve problems such as unsuitable engineering applications

Inactive Publication Date: 2011-02-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the existing technology is not suitable for engineering applications, t

Method used

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  • Saturated self-adjusting controller for time-varying delay uncertain system
  • Saturated self-adjusting controller for time-varying delay uncertain system
  • Saturated self-adjusting controller for time-varying delay uncertain system

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Embodiment Construction

[0047] The saturation self-adjusting controller for time-varying time-delay uncertain systems proposed by the present invention can be realized in most industrial control systems (devices) through software programming or configuration.

[0048] If the storage capacity or calculation load of the industrial control system (device) is limited, it is necessary to use a combination of hardware circuit and software programming to realize the saturation self-adjusting controller. The hardware circuit such as figure 2 As shown, in addition to the central processing unit, the circuit also includes I / O interfaces, communication interfaces, clock synchronization circuits, EPROM, RAM, fault detection circuits, and power-down detection circuits.

[0049]Among them, the I / O interface is used to connect human-computer interaction equipment such as keyboards and displays; the communication interface is used for data transmission with industrial control systems (devices); the clock synchroniz...

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Abstract

The invention discloses a saturated self-adjusting controller for a time-varying delay uncertain system. The controller comprises three parts, namely a self-adjusting limiter, a conventional PID controller and an anti-integral saturator, wherein the conventional PID controller generates a control command uc(t) according to the offset of the controlled parameter y(t) and a target value r(t) thereof; the self-adjusting limiter calculates a steady-state gain K of a time-varying delay uncertain object under the corresponding working condition under the driving of a working condition variable s(t), dynamically generates a limiting value according to the K and r(t), timely limits the uc(t) and generates a final control function u(t); and the anti-integral saturator limits the integral function in the PID controller according to the offset of the uc(t) and u(t) in order to solve the possible integral saturation problem. By applying the invention, an engineering technician can conveniently apply effective control to a class of time-varying delay uncertain systems widely present in the process industry on an industrial control system (device) or in the mode of combining a hardware circuit with software programming so as to improve the safety and operating level of the production process.

Description

technical field [0001] The invention belongs to the technical field of control, in particular to a saturation self-adjusting controller for time-varying time-delay uncertain systems. Specifically, it is a limiter that can be automatically adjusted by setting the amplitude at the output end of a conventional PID controller. At the same time, anti-integral saturation measures are taken to ensure that the time-delay system still has good stability and dynamic performance when the working conditions change in a wide range. optimized controller. Background technique [0002] Time-delay systems exist in large numbers in the production processes of electric power, chemical industry, and steel, and are typical controlled objects in the field of process control. Generally speaking, as the working conditions change, the delay time and gain of the time-delay system will also change greatly. Since the time-delay process (especially the long-delay and time-varying process) will have a ...

Claims

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Application Information

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IPC IPC(8): G05B13/02
Inventor 房方魏乐刘吉臻
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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