Non-minimum phase system output redefinition method

Abstract

The invention discloses a non-minimum phase system output redefinition method, and the method comprises the following steps: S1, establishing a non-minimum phase system linear model, calculating the relative order of a system, selecting a corresponding internal dynamic and external dynamic conversion non-minimum phase model, and further establishing an equivalent control model after input and output linearization; S2, aiming at the original non-minimum phase output, designing an output redefinition method to find the optimal equivalent minimum phase output; S3, designing a linear controller, controlling the equivalent control model by using equivalent minimum phase output, and obtaining original output according to the model conversion method in the S1. The output redefinition method of the non-minimum phase system is provided on the basis of an output redefinition technology in combination with optimal parameter calculation, and the problems that a non-minimum phase system controller is complex in design and control response has negative tuning are solved.

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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