Inductive electric power transmission system and robust mixed sensitivity control method thereof

Abstract

The invention discloses an inductive electric power transmission system and a robust mixed sensitivity control method thereof, and belongs to the field of wireless electric power transmission. The method comprises the following steps of: establishing a state model by utilizing a generalized state space average method according to a system circuit structure, so as to obtain a transfer function G(s)of a nominal object; and defining a sensitivity function S and a complementary sensitivity function T, constructing weighting functions Ws, WR and WT satisfying system performance and robustness requirements by comprehensively considering a system load, a frequency change and an external disturbance factor, establishing a generalized controlled object P and a closed loop transfer function Tzr(s)through a weighted augmented system, and solving a transfer function K(s) of a controller on the basis of an Riccati equation method. According to the method, a mixed sensitivity-based robust controller can be designed according to performance requirements of the inductive electric power transmission system, so that parameter changes can be effectively inhibited and the anti-interference ability and robust stability can be improved.

Description

technical field [0001] The invention relates to an inductive power transmission system and a mixed sensitivity robust control method thereof, belonging to the technical field of wireless power transmission. Background technique [0002] The traditional contact power access mode is often accompanied by problems such as device wear, poor contact, and contact sparks, which may even lead to loss of life and property. Moreover, the charging site is chaotic, which also brings potential hazards to electricity safety. With the increasing demand of people, people are forced to find a safe, reliable, convenient and stable power supply method to replace the traditional wired transmission, and at the same time, it can meet the application requirements in special environments and special occasions. Inductive Coupling Power Transfer (ICPT for short) is a new power access mode that uses space electromagnetic fields to transfer power from the source device to the power receiving device. Thi...

AI Technical Summary

Problems solved by technology

In actual application, as the working conditions or environment of the system change, the aging or damage of system components, the characteristics of the controlled object itself will change accordingly, and the system parameters (such as coupling coefficient, load, resonance frequency, resonance parameters, etc.) ) uncertainty and external interference signals will bring instability to the system, affecting the quality of power transmission, the fluctuation of voltage and current stress of components, and the increase of strong electromagnetic interference, etc.

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