CAJ | 학술논문

基于某6t级小型挖掘机，设计以超级电容作为储能元件的并联式混合动力系统，并给出动力系统各部件的参数。并联式混合动力挖掘机的动力系统是具有强非线性的双输入双输出耦合系统：输入为发动机加速踏板命令和启动发电一体机(Integrated starter generator，ISG)转矩命令，输出为发动机转速和超级电容的电荷状态(State of charge，SOC)。在Matlab/Simulink中对动力系统建模，并提出3种控制策略进行仿真。仿真结果表明，使用发动机加速踏板命令和ISG转矩命令耦合控制发动机转速和超级电容SOC的“耦合控制策略”较优。另外，以某型6吨挖掘机为基础，制造一台混合动力挖掘机原型机，并且设计基于CAN网络的分布式控制系统，基于MPC561单片机自主开发一款32位整车控制器。实车试验的结果表明，耦合控制策略能够实现发动机转速波动在±100 r/min以内，超级电容SOC在循环间基本保持不变，发动机工作在相对高负荷低油耗工作区，系统综合节油率在15%左右。
기우모6t급소형알굴궤，설계이초급전용작위저능원건적병련식혼합동력계통，병급출동력계통각부건적삼수。병련식혼합동력알굴궤적동력계통시구유강비선성적쌍수입쌍수출우합계통：수입위발동궤가속답판명령화계동발전일체궤(Integrated starter generator，ISG)전구명령，수출위발동궤전속화초급전용적전하상태(State of charge，SOC)。재Matlab/Simulink중대동력계통건모，병제출3충공제책략진행방진。방진결과표명，사용발동궤가속답판명령화ISG전구명령우합공제발동궤전속화초급전용SOC적“우합공제책략”교우。령외，이모형6둔알굴궤위기출，제조일태혼합동력알굴궤원형궤，병차설계기우CAN망락적분포식공제계통，기우MPC561단편궤자주개발일관32위정차공제기。실차시험적결과표명，우합공제책략능구실현발동궤전속파동재±100 r/min이내，초급전용SOC재순배간기본보지불변，발동궤공작재상대고부하저유모공작구，계통종합절유솔재15%좌우。
A parallel hybrid power train system is designed based on a 6 t hydraulic excavator, and the specifications are introduced. The power train of a parallel hybrid excavator is a two-input-two-output system with engine torque and integrated starter generator (ISG) torque as inputs while engine speed and state of charge(SOC) of super capacitor as outputs. The model of the powertrain is built in Matlab/Simulink. Three control strategies are designed and simulated. The results show that the“coupling control strategy”is the best of the three. A 32-bit HCU is developed. A prototype hybrid excavator is built. Testing results show that the fluctuation of the engine speed is within ±100 r/min, and the SOC of super capacitor can be kept sustaining during work cycles. Compared with a traditional hydraulic excavator, the engine operates more efficiently, reducing fuel consumption by approximately 15%.