履带车辆悬挂系统振动的半主动控制与仿真

恶劣路面上行驶的履带车辆的振动对车辆的性能、平顺性、操作稳定性及运动安全性都造成不同程度的消极影响。履带车辆悬挂系统振动的加速度是描述履带车辆振动程度的一个重要指标。首先提出了一个考虑负重轮的履带车辆悬挂系统的力学模型,并且建立了相应的运动微分方程组。又选取了一组新的描述悬挂系统运动的输出变量,然后应用二次型半主动最优控制理论,具体计算了正弦路面激励下悬挂系统在控制前后运动状态的改变。参数分析和数值仿真结果表明,通过选取合适的控制参数,就能使履带车辆悬挂系统的加速度得到有效的控制。     

Fuzzy Logic Control for Suspension Systems of Tracked Vehicles

A scheme of fuzzy logic control for the suspension system of a tracked vehicle is presented.A mechanical model for the whole body of a tracked vehicle,which is totally a fifteen-degree-of-freedom system,is established.The model includes the vertical motion,the pitch motion as well as the roll motion of the tracked vehicle.In contrast to most previous studies,the coupling effect among the vertical,the pitch and the roll motions of the suspension system of a tracked vehicle is considered simultaneously.The simulation of fuzzy logic control under road surface with random excitation shows that the acceleration,pitch angle and roll angle of suspension system can be efficiently controlled.     

利用海水资源缓解平潭水资源供需矛盾

从缓解水资源供需矛盾角度,对平潭海水资源利用前景进行探讨,且对平潭今后海水利用提出对策建议。     

履带车辆悬挂质量系统振动的模糊控制与仿真

本文提出了一种模糊控制方法以控制履带车辆悬挂质量系统的上下垂直线振动和前后俯仰运动的角振动。建立了含8自由度的二分之一履带车辆悬挂系统的力学模型，同时考虑了履带车辆的垂直线振动和俯仰角振动的耦合效应。另外，本文也研究了不同控制力的组合对控制效果的影响，发现在转动控制中存在所需控制力的极小值。模糊控制的数值仿真结果表明在规则正弦路面和复杂随机路面下悬挂系统的加速度和俯仰角均可得到有效控制。     

Analyses and Simulation of Fuzzy Logic Control for Suspension System of a Track Vehicle

The vibration caused by terrible road excitation affects the ride quality and safety of track vehicles.The vibration control of suspension systems is a very important factor for modern track vehicles.A fuzzy logic control for suspension system of a track vehicle is presented.A mechanical model and a system of differential equations of motion taking account of the mass of loading wheel are established.Then the fuzzy logic control is applied to control the vibration of suspension system of track vehicles for sine signal and random road surfaces.Numerical simulation shows that the maximum acceleration of suspension system can be reduced to 44% of the original value for sine signal road surface,and the mean square root of acceleration of suspension system can be reduced to 21% for random road surface.Therefore,the proposed fuzzy logic control is an efficient method for the suspension systems of track vehicles.