最后，叙述了控制系统程序的编制以及相关的试验，结果表明该并联混合动力驱动系统能够实现飞机牵引车预期的性能要求。

At last, the control system is programmed and tested, and the results show that the parallel hybrid drive system achieves the performance requirement which is expected for the aircraft towing tractor.

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本文针对特种牵引车运行工况特点进行混合动力驱动系统分析与设计，通过优化有效地减少了车辆排放，提高了燃油利用率，并且降低了制造成本。

According to the drive cycle of terminal tractor, this paper designs hybrid system, so it can effectively reduce emissions and improve fuel efficiency, and reduce the relatively cost.

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