Aircraft hydraulic brake system control method and device considering pipeline effect
A technology of hydraulic braking and control method, applied in aircraft braking arrangement, braking transmission, brake and other directions, can solve the problem that the output pressure of the pressure servo valve is prone to oscillation, the dynamic performance, control accuracy and reliability of the aircraft hydraulic braking system Influence, instability, etc.
Active Publication Date: 2018-10-19
BEIHANG UNIV
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Problems solved by technology
The pipeline will introduce under-damped frequency characteristics to the system, and this characteristic will be coupled with the inherent local pressure closed-loop structure of the pressure servo valve, making the output pressure of the pressure servo valve prone to oscillation and instability, which will affect the hydraulic braking system of the aircraft. Great influence on dynamic performance, control accuracy and reliability
[0003] Traditional control methods for hydraulic brake systems cannot effectively solve the problem of oscillation and instability of hydraulic brake systems with long pipelines, so a control technology for valve-cylinder separation hydraulic brake systems with long pipelines is needed
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[0038] The following describes the control method and device for the hydraulic brake system and the hydraulic brake control system according to the embodiments of the present invention with reference to the accompanying drawings.
[0039] figure 1 A flowchart showing a control method for a hydraulic brake system according to an embodiment of the present invention. Such as figure 1 As shown, the control method for the hydraulic brake system of the present invention includes: signal acquisition and processing steps for acquiring and processing the displacement signal of the brake actuator of the hydraulic brake system. Specifically, the signal acquisition and processing steps include: successively acquiring, for example, 4096 multiple displacement signals of the brake actuator in time sequence; and performing fast discrete Fourier transform on the acquired multiple displacement signals to remove useless phase information and The characteristic signal representing the frequency and ...
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The invention provides a control method for a hydraulic braking system. The method comprises the signal collection and processing step, wherein displacement signals of a brake actuator of the hydraulic braking system are collected and processed; the prediction signal generation step, wherein a feedforward self-adapting filter is constructed on the basis of processed signals, and prediction signals are output to a pressure servo valve of the hydraulic braking system through the feedforward self-adapting filter; the control evaluation step, wherein pressure is output on the pressure servo valve on the basis of the prediction signals, and after the pressure is transmitted to the brake actuator through a brake pipeline, deviation signals of displacement control of the brake actuator are collected so as to build an evaluation function, and current control is evaluated; the self-adapting filter parameter adjusting step, wherein on the basis of the evaluation result of the evaluation function, parameters of the feedforward self-adapting filter are adjusted. The invention further provides a control device for the hydraulic braking system and a hydraulic braking control system.
Description
Technical field [0001] The invention relates to a control method, a device and a hydraulic brake control system for a hydraulic brake system considering the effect of pipelines. Background technique [0002] Aircraft hydraulic brake systems usually use pressure servo valves to control the brake pressure. Due to layout restrictions, there are often long hydraulic lines between the pressure servo valve and the brake actuator. The pipeline will introduce an under-damped frequency characteristic to the system, and this characteristic will be coupled with the inherent partial pressure closed-loop structure of the pressure servo valve, making the output pressure of the pressure servo valve prone to oscillation and instability, which will affect the aircraft hydraulic brake system. Dynamic performance, control accuracy and reliability have a great impact. [0003] Traditional control methods for hydraulic brake systems cannot effectively solve the problems of oscillation and instability ...
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IPC IPC(8): B60T13/12B60T13/70B64C25/44
CPCB60T13/12B60T13/70B64C25/44
Inventor 徐远志郑慧伟焦宗夏柴凌云
Owner BEIHANG UNIV