某矿用汽车动力性换挡规律设计及优化

Design and Optimization of Shift Schedule for a Mining Truck

针对矿用汽车设计了动力性换挡规律,利用MATLAB/Simdriveline建立整车动力学模型进行仿真,验证了车辆的动力性能.为了得到针对所建仿真模型最优的换挡点,提出以加速时间为目标,用ISIGHT调用MATLAB对换挡点进行优化,并与设计换挡规律进行动力性对比.结果表明,优化得到的换挡规律加速时间减少、动力性更好.该方法可以方便、快速、有效地修正优化变量,对换挡规律设计和改进以及其他动力学仿真中参数的优化有实际意义.

In order to improve its dynamic performance,a shift schedule is designed for a mining truck. A dynamics model of the vehicle is established by MATLAB / Simdriveline,and its performance is verified by using the designed schedule. In order to get the optimal shift points for the model,the method is put forward of taking the acceleration time as a goal and optimizing every shift point in ISIGHT and MATLAB. The vehicle performance of using the optimized schedule is compared with that of the designed one. The simulation results show that,with the optimized shift schedule,the acceleration time of the vehicle reduces and the performance gets better. This method can be used to modify the optimization variables,the shift schedule and the simulation parameters.