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Non-linear self-adaptive filter for dynamic hysteretic system modeling and compensation

An adaptive filter and hysteretic nonlinear technology, applied in the direction of adaptive network, impedance network, electrical components, etc., can solve the problem of poor modeling accuracy of dynamic hysteretic nonlinear systems

Inactive Publication Date: 2015-07-22
BEIHANG UNIV
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Problems solved by technology

[0005] The technical problem to be solved in the present invention is: to overcome the shortcomings of FIR adaptive filter, Backlash adaptive filter and Volterra adaptive filter dynamic hysteresis nonlinear system modeling precision is relatively poor, to provide a kind of high precision, good real-time performance, An Easy-to-Realize Nonlinear Adaptive Filter and Its Modeling and Compensation Method for Dynamic Hysteresis Nonlinearity

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  • Non-linear self-adaptive filter for dynamic hysteretic system modeling and compensation
  • Non-linear self-adaptive filter for dynamic hysteretic system modeling and compensation
  • Non-linear self-adaptive filter for dynamic hysteretic system modeling and compensation

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Embodiment Construction

[0034] In order to better illustrate the purpose and advantages of the present invention, it will be further described below in conjunction with the accompanying drawings and examples.

[0035] The structure of a nonlinear adaptive filter used for dynamic hysteresis system modeling and compensation of the present invention is as follows: figure 1 As shown, it includes multiple delay operator modules, multiple GPO modules with evenly distributed thresholds, multiple adaptive weighting modules, an adder module, an error calculation module, and a weight adaptive adjustment module. Calculate the output of each GPO link according to formula (1).

[0036] In this embodiment, experiments are carried out on the experimental platform of the giant magnetostrictive actuator system to verify that the modeling effect of the nonlinear adaptive filter proposed by the present invention is better than that of the prior art.

[0037] A schematic diagram of the system for modeling the hysteresi...

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Abstract

The invention discloses a non-linear self-adaptive filter for dynamic hysteretic system modeling and compensation. The filter comprises a plurality of delay modules, a plurality of general play operator modules with different threshold values, a plurality of self-adaptive weighting modules, an adder module, and an error calculation module. Through the adoption of the non-linear self-adaptive filter disclosed by the invention, the high-precision modeling of a dynamic hysteretic non-linear system under a wide band can be realized, and the self-adaptive inverse control based on the filter is capable of effectively compensating dynamic hysteretic non-linearity of actuators such as piezoelectric ceramics and magnetostriction.

Description

technical field [0001] The invention relates to a nonlinear adaptive filter and a modeling and compensation method for a dynamic hysteresis nonlinear system, belonging to the field of dynamic hysteresis nonlinear system modeling and control. Background technique [0002] Hysteretic nonlinearity widely exists in systems such as magnetostrictive alloys and piezoelectric ceramics. It is a special kind of nonlinearity, which is characterized by rate-independent memory. Its existence reduces the control precision and control bandwidth of the system, and even causes system oscillation. In practical engineering, the hysteresis system is often under the coupling effect of multiple fields such as thermal-mechanical-electrical-magnetic, which forms a more complex dynamic hysteresis nonlinearity. [0003] Traditional hysteretic nonlinear models such as Prandtl-Ishlinskii (PI) model, Presiach model, Bouc-Wen model, Duhem model, Jile-Atherton (JA) model, etc. are all static hysteretic n...

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Application Information

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IPC IPC(8): H03H21/00
Inventor 张臻马耀鹏毛剑琴郭咏新庞文涛卢经纬
Owner BEIHANG UNIV
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