Limit PID control method of multi input multi output system

A control method and multi-output technology, which is applied to controllers with specific characteristics, adaptive control, electric controllers, etc., can solve the problems that the form of the controller cannot be directly deformed, errors, and approximate accuracy limitations
CN1794119AInactive Publication Date: 2006-06-28SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2006-06-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for controlling limit PID of multi-input / multi-output system includes identifying model as per transfer function matrix of multi-input / multi-output procedure, designing three optimum demodulation factors based on robust control theory, designing optimum controller based on said factors and optimum performance target, simplifying sub controller in controller matrix, obtaining output control signal by calculation and sending it to executor after D / A conversion to act it onto controlled object to let controlled object be operated in set range.
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Description

technical field

[0001] The invention relates to a method used in the technical field of industrial process control, in particular to a limit PID control method for a multi-input multi-output system. Background technique

[0002] In order to solve the coupling problem of the multivariable system, the commonly used method is to decouple the multivariable system into multiple univariate systems, and then apply the control method of the univariate system to realize the multi-loop control, also known as the distributed control structure. Due to the advantages of simple structure, low cost and strong independent workability of each closed loop, it is widely used in chemical practice. However, the stability of this control structure is easily damaged by the uncertainty of the actual controlled process. In addition, when there is interference and uncoordinated control effects between each independent closed-loop control system in the multi-loop control structure, the system cannot a...

Claims

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