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A servo displacement control method for an integrated hydraulic brake system

A technology of hydraulic braking and displacement control, applied in fluid pressure actuating system components, fluid pressure actuating devices, mechanical equipment, etc. Guarantees robustness and accuracy, and compensates for the effects of time-varying uncertain perturbations

Active Publication Date: 2022-05-31
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the integrated hydraulic brake system with electromechanical-hydraulic coupling has nonlinear problems such as friction of the transmission mechanism and time-varying characteristics of the hydraulic system, which seriously hinders its high-precision servo displacement control strategy.

Method used

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  • A servo displacement control method for an integrated hydraulic brake system
  • A servo displacement control method for an integrated hydraulic brake system
  • A servo displacement control method for an integrated hydraulic brake system

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Experimental program
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Embodiment

[0232] We tested the servo displacement control method of the integrated hydraulic brake system based on the adaptive radial basis neural network designed in this patent on the simulation platform built by MATLAB / Simulink.

[0233] Figure 4 , Figure 5 and Figure 6 Respectively, the control performance curves of the horizontal speeds of the target screw are 5mm / s, 30mm / s, and 70mm / s. From the test results of three sets of experiments, it can be clearly seen that the horizontal displacement of the lead screw follows well. At a speed of 5mm / s, the horizontal displacement tracking error of the screw is almost zero; at a speed of 30mm / s, the horizontal displacement tracking error of the screw is always within 0.5mm, which meets the actual pressure control accuracy requirements; at a speed of 70mm / s, the integrated The non-linearity of the mechanism of the hydraulic brake system increases, so the difficulty of its control is greatly increased.

[0234] However, the servo disp...

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Abstract

The invention belongs to the technical field of automobiles, and in particular relates to a servo displacement control method for an integrated hydraulic braking system. It includes the following steps: step 1, establishing an integrated hydraulic brake system model oriented to controller design, and generating a complete dynamic balance equation at the screw shaft; step 2, using backstepping theory and sliding mode variable structure theory to design high-precision The servo displacement controller of the integrated hydraulic braking system; Step 3, using the adaptive radial basis neural network to compensate the uncertain disturbance faced by the integrated hydraulic braking system. The invention can effectively help the integrated hydraulic brake-by-wire system to overcome the non-linear problems such as mechanism friction resistance and hydraulic time-varying characteristics, realize high-precision servo displacement control, and lay the foundation for the active braking function of the integrated hydraulic brake-by-wire system The foundation meets the needs of intelligent and electrified vehicles.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and specifically relates to a servo displacement control method of an integrated hydraulic braking system. Background technique [0002] With the continuous development of automobile intelligence and electrification, new functional requirements such as active braking and decoupling regenerative braking are put forward for the automobile chassis braking system. Since the electric vehicle has eliminated the engine, the braking system in the form of a traditional vacuum booster has lost the vacuum source on which it works. Moreover, the braking system in the form of a vacuum booster is usually difficult to integrate high-precision active braking and high-recovery regenerative braking functions. Therefore, many new brake-by-wire solutions have appeared on the market, such as integrated hydraulic braking systems. , Electro-mechanical brake-by-wire systems, electro-hydraulic brake-by-wire systems,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B21/08F15B21/02
CPCF15B21/087F15B21/02
Inventor 赵健陈志成朱冰
Owner JILIN UNIV