基于双模式驱动的飞行汽车起飞阶段动力匹配分析

Power matching of flying cars during takeoff stage based on dual-mode driving

针对折叠翼飞行汽车起飞阶段的动力匹配问题,研究了基本的动力控制策略,通过理论计算分析了起飞阶段双模式驱动特性,提出了最佳切换时刻的概念。对某型飞行汽车传动系统进行了动力匹配计算,并以该飞行汽车参数为基础,在Simulink中建立了不同工况下的行驶仿真模型,对起飞阶段行驶状态进行了仿真分析,给出了基于双模式驱动的动力匹配方案以及最佳切换时刻的选取原则。计算结果表明,通过采取双模式驱动,起飞加速时间缩短22%,起飞滑跑距离缩短13%。进一步对传动系统参数、整车设计参数以及发动机输出特性进行了优化分析,分析计算结果给出了各参数变化对起飞动力性能的影响。

To solve power-matching problem during takeoff stage of folding wing flying car,the basic dynamic control strategy was studied. The dual-mode driving characteristics during takeoff stage were analyzed through theoretical calculation,and the concept of the optimal switching time was proposed. Based on the basic parameters and results of power-matching calculation of the concept car,the driving state simulation models under different working conditions were established in Simulink. According to the driving state simulation models,the simulation analyses on driving state during takeoff stage were conducted,and the dual-mode driver selection principle and optimum matching scheme of switching time were obtained. The calculation results show that the takeoff acceleration time is reduced by 22% and the takeoff distance is shortened by 13% based on dual-mode driving. The optimization analyses on transmission and vehicle parameters and variation of output characteristics were further conducted,from which the effect of the parameters on power performance during takeoff stage was obtained.