汽车悬架振动的单片机控制及其效果分析

Vehicle Suspension Vibration Control with Monolithic Computer and its Effect Analysis

介绍了将80C196KC单片机用于汽车悬架系统控制的设计方案,控制原理及其软件设计、程序设计和抗干扰设计,实现了悬架调平功能以及上升下降、前俯后仰和左右倾斜等独立控制功能,同时实现了悬架状态和其它设备的监控,从而明显地改善了汽车的行驶平顺性,为此设计了一种实用的微机控制系统。作为实例,采用汽车制动—悬架隔振效率试验台获取了B J2020S越野吉普车和HONDA LEGEND 3.0轿车前、后悬架的振动曲线,对其计算了系统参数如一阶固有频率和阻尼比,并获得了悬架系统振动信号的自功率谱密度图形,求取其一阶固有频率处的带中功率,分析了B J2020S越野吉普车和HONDA LEGEND 3.0轿车两种车型悬架的隔振性能差别。

A monolithic computer controlled vehicle suspension is described in this paper,and its design plan of the control system such as control principle, software design, program design and anti-interference design are given. The level adjustment and the independent control functions including ascending, descending, pitching and inclining are realized. Due to control the suspension state and other equipments at same time, the riding stability of vehicle is obviously improved by a practical computer control system. As an example and based on the test rig for vehicle braking-suspension anti-vibration effficiency,the vibration curves of front and rear suspensions of BJ2020S road-off jeep and HONDA LEGEND 3.0 car are obtained. The system parameters such as one rank nature frequency and damp rate are calculated with the vibration curve. The power in the band containing the one rank nature frequency is got with the figure of power spectrum density that is given based on the test vehicle suspension vibration signal. The difference of anti-vibration capability between the BJ2020S road：off jeep and HONDA LEGEND 3.0 car is analyzed.