履带车辆加速性性能泛函及数值求解

Functional and numerical solutions of acceleration performance of tracked vehicles

履带车辆推进系统传动装置的优化匹配是提高车辆机动性的关键。为改善履带车辆的动力性能,将履带车辆加速过程抽象为性能泛函取极值的数学问题,提出了有级变速传动的加速性能泛函数学表征。考虑履带车辆内部及外部约束条件,采用全局优化的遗传算法,对不同加速性能权重指标下的最优加速性速比进行数值求解,对比分析速比优化前后履带车辆的加速性。结果表明,泛函优化后的速比使得车辆0~32 km/h加速时间缩短了7.89%,验证了泛函分析设计方法对优化履带车辆动态加速过程的有效性。

The optimal matching of the transmission device of the tracked vehicle drive system is the key to improving vehicle maneuverability.In order to improve the dynamic performance of a tracked vehicle,this paper abstracts the vehicle acceleration process as a mathematical problem of taking the performance functional extremum,and proposes a functional mathematical characterization of the step-variable transmission acceleration performance.The internal and external constraints of the tracked vehicle are considered,and the genetic algorithm of global optimization is then adopted.In addition,the optimal acceleration ratio under different acceleration weight coefficients is solved and analyzed.The acceleration of the tracked vehicle before and after the optimization is compared.The results show that the functionally optimized speed ratio shortens the acceleration time of the vehicle by 7.89% from 0 to 32 km/h.The effectiveness of the functional analysis method to optimize the dynamic acceleration of the tracked vehicle is verified.