坐骑式割草机座椅悬架减振研究

Study on vibration reduction of seat suspension of a mounted lawn mower

针对坐骑式割草机在恶劣工况下因振动引起的舒适性差与安全性低的问题,基于半车动力学简化模型,提出一种改进的模拟退火算法;通过MATLAB对车辆在被动座椅悬架和半主动座椅悬架两种条件下的数值计算表明:改进后的模拟退火算法精度与改进前的模拟退火算法精度一致,但两种条件下所需的计算时间均为改进前的37%。在此基础上,运用ADAMS和MATLAB进行联合仿真验证,改进后模拟退火算法优化下的LQR控制器对半主动座椅悬架的性能有较大的改善:座椅悬架的垂直加速度降低67.24%,悬架动行程减少14.90%。

Aiming at the problem of poor comfort and low safety caused by vibration of riding mower under bad working conditions, an improved simulated annealing algorithm is proposed based on the simplified half-car dynamics model. The numerical calculation of vehicle under passive seat suspension and semi-active seat suspension by MATLAB shows that the improved algorithm is effective. The precision of the improved simulated annealing algorithm is the same as that of the improved simulated annealing algorithm, but the computational time required under both conditions is 37% of that before the improvement. On this basis, ADAMS and MATLAB are used for joint simulation verification. The performance of semi-active seat suspension is greatly improved by using the LQR controller optimized by the improved simulated annealing algorithm. The vertical acceleration of the seat suspension is reduced by 67.24%, and the dynamic travel of the suspension is reduced by 14.90%.