A Method for Redefining Output of Non-Minimum Phase System

Abstract

The invention discloses a non-minimum phase system output redefinition method, comprising the following steps: S1. Establishing a non-minimum phase system linear model, calculating the relative order of the system, and selecting the corresponding internal dynamic and external dynamic conversion non-minimum phase model , and then establish the equivalent control model after input and output linearization; S2, for the original non-minimum phase output, design the output redefinition method to find the optimal equivalent minimum phase output; S3, design a linear controller, use the equivalent minimum phase output The phase output controls the equivalent control model, and the original output is obtained according to the method of model conversion in S1. The invention proposes a non-minimum phase system output redefinition method based on the output redefinition technology combined with optimization parameter calculation, which solves the problems of complex design of the non-minimum phase system controller and negative adjustment of the control response.

Description

technical field [0001] The invention relates to a method for redefining the output of a non-minimum phase system. Background technique [0002] Non-minimum phase systems are common in practical engineering applications, and the control of non-minimum phase systems is often complicated. Classical control theory can't be directly used to solve the control problem of non-minimum phase system (NMPS), how to make the control problem of non-minimum phase system simple is of great significance. The transfer function of the linear system can be written in the frequency domain. For the linear non-minimum phase system, the zero point of the right half plane of the transfer function is an unstable zero point, and its existence will cause the instability of the controlled system to diverge. The traditional method of configuring the feedback controller can specify the position of the pole of the system, but cannot change the position of the zero point of the system, so it cannot guarant...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a technology based on output redefinition, combined with the optimal parameter calculation, a non-minimum phase system output redefinition method is proposed, which solves the problem of non-minimum phase system controller design Output redefinition method for non-minimum phase systems with complex and negatively tuned control responses

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