车辆转向制动防抱死系统仿真研究

转向制动是车辆经常遇到的工况之一。本文提出了汽车转向制动时防抱死制动系统（ABS）基于优化目标滑移率模糊控制的策略。该策略根据路面附着条件以及车辆所处的运动状态实时计算出车轮优化目标滑移率，作为防抱死制动系统的控制目标，并利用模糊推理理论进行了ABS模糊控制器设计。在此基础上结合8自由度非线性车辆系统模型，利用Matlab/Simulink软件对装有ABS的车辆转向制动过程进行模拟试验。结果表明基于优化目标滑移率ABS模糊控制策略优于传统固定目标滑移率控制策略，它有效地提高了车辆转向制动性能，同时也保证了横向稳定性，实现了车辆的制动性能、可控性及横向稳定性最佳协调，同时且具有较强的鲁棒性。

An Investigation into Optimal Target Slip Ratio Control for Simulation of an Anti-lock Braking System of Vehicles

This paper presents a new control scheme for an anti-lock braking system of vehicles, based on real-time optimal target wheel slip ratio obtained according to the vehicle dynamic state and road conditions. A fuzzy logic approach is applied to maintain the optimal target slip ratio so that best compromise between deceleration, steerability and directional stability can be obtained for the vehicle. The scheme is implemented with eight DOFs (Degree-of-Freedom) nonlinear vehicle model by using Matlab/Simulink software. Simulation results show that the proposed the scheme is robust and superior in improving vehicle performance to conventional one, which is based upon fixed slip ratios, during cornering and lane changes.