半主动抗俯仰液压互联悬架俯仰动力学的研究

在城市交通中,车辆频繁的加速和减速会引起车身俯仰振动,从而导致乘坐不适,甚至晕车。基于粒子群算法的类天棚控制和PID控制,研究一种阻尼连续可调的抗俯仰液压互联悬架系统。建立包含制动系统、轮胎和液压互联悬架系统的半车模型;分析液压互联悬架刚度阻尼特性和阻尼阀孔径对车身俯仰角平顺性的影响;设计类Skyhook和PID控制器,采用粒子群算法整定控制参数;利用Simulink和Amesim联合仿真模拟直线制动工况,分析平顺性优化效果和制动安全性。结果表明,与被动悬架相比,半主动抗液压互联悬架有效地提高车辆的平顺性。

Pitch dynamics of a semi-active anti-pitch hydraulic interconnected suspension

In urban traffic, frequent accelerating and decelerating of a vehicle can cause the vehicle to pitch and rock, causing discomfort and even motion sickness.Based on the particle swarm optimization-based control and PID control, a continuously adjustable anti-pitch hydraulic interconnected suspension system was proposed.A semi-vehicle model including the brake system, tire and hydraulic interconnected suspension system was established.and the factors affecting the stiffness and damping characteristics of the hydraulic interconnected suspension,the pitch control and the ride comfort were analyzed.The Skyhook and PID controllers were designed, and the control parameters were set by using the particle swarm optimization algorithm.The linear braking conditions were simulated by combined use of the softwares of Simulink and Amesim, and the smoothness optimization effect and braking safety under the proposed control strategy were analyzed.The results show that the semi-active anti-hydraulic interconnected suspension can more effectively improve the ride comfort of the vehicle compared to the passive suspension.