2-SPS+SR多维减振工程车辆座椅悬架运动学分析

Kinematics Analysis of Multi-dimensional Vibration Reduction Construction Vehicle Seat with 2-SPS+SR Suspension

工程车辆对承载能力有较高要求,其悬架刚度大,减振性能差,工作环境恶劣,在垂直、俯仰和侧倾3个方向易受到剧烈振动,严重影响驾驶员身心健康与车辆的操作稳定性。针对此问题,提出了一种应用于工程车辆座椅的2-SPS+SR多维减振悬架。首先,利用单开链理论对该座椅悬架进行一平移两转动的自由度分析;然后,建立位置方程对座椅悬架进行位置分析,给出了该悬架结构位置的正解。并通过对位置方程进行一次、二次求导,得到了悬架的1阶运动系数和2阶运动系数,利用运动系数对并联座椅悬架进行速度和加速度运动学分析;最后,在Adams/view中进行仿真分析并在Matlab中进行数学模型编程仿真,验证了建立的数学模型与理论分析的正确性。该分析结果为后期悬架的控制仿真研究以及工程车辆在三维路面下乘坐舒适性的研究提供了重要参考。

Construction vehicles have high requirements for load carrying capacity,with suspension stiffness large,vibration damping performance poor,and working environment harsh,severe vibration in the three directions of vertical,pitch and roll,which seriously affects the physical and mental health of the driver and the vehicle operational stability.To solve this problem,a 2-SPS+SR multi-dimensional vibration-damping suspension for construction vehicle seats is proposed.Firstly,the degree of freedom analysis of two translations and one rotation of the seat suspension is carried out by using the single-open chain theory.Then,the position equation of the seat suspension is established to analyze the position of the seat suspension,and the positive solution is given for the suspension structure.The first and second order motion coefficients of the suspension are obtained by taking the first and second derivatives of the position equation.Finally,the simulation analysis is performed in Adams/view and programming simulation of mathematical model is performed in Matlab to verify the correctness of the established mathematical and theoretical analysis.The results of analysis provide important significance for the study of the control simulation of the suspension and the research on the ride comfort of the construction vehicle on the three-dimensional road in the later period.