Vehicle active anti-rollover control system with time-lag compensation function and vehicle active anti-rollover control method

Abstract

The invention relates to a vehicle active anti-rollover control system with a time-lag compensation function and a vehicle active anti-rollover control method. The vehicle active anti-rollover controlsystem comprises a sensor module, a transverse load transfer rate estimating module, a transverse load transfer rate predicting module, a time-lag identification module, an active anti-rollover controller and an anti-rollover actuator module. The sensor module obtains the vehicle transverse acceleration and a vehicle body side inclination signal. The transverse load transfer rate estimating module calculates an estimate value of the vehicle transverse load transfer rate in real time and judges the vehicle rollover degree. The transverse load transfer rate predicting module takes the estimatevalue, calculated by the estimating module, of the transverse load transfer rate as input, determines the time needing to be predicted in advance according to a control system time lag identified by the time-lag identification module, and outputs the transverse load transfer rate in the future time. Anti-rollover control over a vehicle is achieved through the anti-rollover controller. The time lagof the vehicle anti-rollover control system can be compensated, meanwhile, control precision can be guaranteed, and the active safety of the vehicle is improved.

Description

technical field [0001] The invention relates to the field of active safety control of automobiles, and more particularly relates to a vehicle active anti-rollover control system and method with a time-delay compensation function. Background technique [0002] With the rapid development of the automobile industry, the improvement of people's living standards and the acceleration of the pace of life, people have higher and higher requirements for the safety of automobiles. Some vehicles, such as SUVs and buses, are prone to rollover accidents due to their high center of mass, relatively large mass and volume, and relatively narrow wheelbase. Once a rollover accident occurs, it will easily lead to serious casualties and significant economic losses. Therefore, vehicle anti-rollover technology has become a hot research issue in the field of vehicle active safety. [0003] Vehicle active anti-rollover control is an effective way to prevent vehicle rollover. Active suspension, di...

AI Technical Summary

Problems solved by technology

However, since this index is related to the vertical load of the left and right tires and cannot be directly calculated, how to accurately estimate the lateral load transfer rate is very important

[0004] In addition, in the active anti-rollover control of the vehicle, the acquisition and processing of the signal, the calculation of the control algorithm, and the execution of the actuator all take time, which leads to a time lag phenomenon in the control system

The existence of time lag not only affects the control performance, but even leads to the instability of the control system

For this reason, scholars at home and abroad have carried out research on time-delay control of control systems, such as robust control strategies for active anti-rollover of automobiles. It can still work in the case of , but improving the robustness of the control system will inevitably be at the cost of sacrificing control accuracy

Images