Virtual prototype-based suspension system control simulation method of four-axle heavy truck

Abstract

The invention relates to virtual prototype and MATLAB control system joint simulation with the aim of improving dynamic performance of vehicles. The technical problems solved by the invention are to provide a modified sky-hook control simulation technology of the four-axle heavy truck suspension system coupling the virtual prototype and MATLAB, and improve the road friendliness and smoothness of vehicles, aiming at the shortcomings of the prior art. The method of the invention is based on the ADAMS / View platform to build a four-axle heavy truck virtual prototype model and all grades of bilateral track multipoint random excitation pavement models; a modified sky-hook control algorithm is provided according to the modern control theory, ADAMS and Matlab / Simulink joint simulation are adoptedto realize the semi-active control and active control of modified sky-hook of suspension system damping. The important innovation of the invention is to realize the ADAMS / MATLAB joint simulation of the four-axle heavy truck suspension system; and the designed and modified sky-hook control algorithm is applicable to the semi-active control and active control of the suspension system, and can effectively improve the road friendliness and smoothness of the four-axle heavy truck and have stronger robustness.

Description

1. Technical field [0001] The invention relates to the research fields of suspension design, automatic control, road surface damage, etc., and in particular to a joint simulation of a virtual prototype and a MATLAB control system aiming at improving various dynamic performances of vehicles. 2. Background technology [0002] With the rapid development of highway traffic, the maintenance and repair costs of high-grade highways caused by the dynamic load of heavy trucks have increased year by year, which has aroused great attention from vehicle design, operation and road transportation management departments. The ride comfort of a heavy-duty truck directly affects various aspects such as smooth running, ride comfort, cargo integrity, component fatigue life, transportation efficiency, and energy consumption (fuel consumption). The design of the suspension system directly affects the driving performance of the vehicle. In recent years, the design of heavy truck suspension system...

AI Technical Summary

Problems solved by technology

Compared with other models, the suspension system structure of multi-axle heavy trucks is more complex, often using multiple types of ordinary steel plate suspension, balance shaft balance suspension, air suspension, etc., and the vibration of the sprung mass on each axle will affect each other , therefore, the dynamic characteristics of multi-axle heavy goods vehicle suspension system need to be deeply and systematically explored;

[0007] 2. The passive suspension optimization based on virtual prototype technology has achieved rich research results, but the simulation technology of semi-active and active control of heavy truck suspension system by integrating MATLAB control technology into virtual prototype has not been reported yet;

[0008] 3. Strategies such as fast model predictive control, H-infinite control, and LQR control have complicated algorithms and are only suitable for vehicles with relatively constant suspension parameters (such as steel plate suspension vehicles without shock absorbers). For complex suspension systems Optimization can't do anything

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