Research On Control Strategy Of Distributed Driving Pure Electric Bus

In order to reduce the pressure of traffic congestion and environmental pollution,governments of all countries are vigorously improving the construction of public transport capacity and encouraging residents to take public transport.Pure electric bus can not only reduce noise,improve passenger comfort,but also achieve real pollution-free,zero emissions,so it has become the main model in public transport.Due to the configuration limitation of the traditional electric bus,the passenger carrying capacity and comfort of the bus are not fully developed.The distributed drive pure electric bus has the advantages of compact structure,high energy efficiency,low floor,large space,etc.It is a new model urgently needed to be developed by bus manufacturers.In this paper,the control strategy of distributed drive pure electric bus and related energy-saving issues are studied,and the developed control strategy is verified on the sample vehicle.The main research contents and achievements are as follows:Firstly,the types and functions of electrical appliances are analyzed,and the control circuit and can communication network of electrical appliances are compiled.By reasonably dividing the signal processing flow of the control program,the control program design is decoupled from the actual input signal to meet the platform requirements of the control strategy.Then,the whole vehicle control program is divided into modules,and the specific functions of the modules and the signal transmission between the modules are compiled;the vehicle working process is divided into modes,and the mode jump process is formulated;the whole vehicle driving control strategy and the fault diagnosis and treatment of the distributed drive vehicle are also studied,and the acceleration torque compensation is realized by using the motor characteristics.According to the failure condition of the distributed drive individual motor,the fault handling strategy is formulated.Then,based on the efficiency diagram of the motor and the redundancy of the distributed drive actuator,the research on the optimal distribution strategy of the distributed drive torque is completed,and it is verified by simulation.Finally,the developed vehicle control strategy is tested by hardware in the loop,real vehicle debugging and real vehicle road test,and the control strategy system is developed and verified.Through simulation and test results analysis,the software control system module of the vehicle controller studied in this paper can independently complete their own functions,reduce the complexity of the program,and have good portability and readability;the vehicle can meet the normal functional requirements,and the drive control strategy can improve the vehicle economy while taking into account the power.The fault diagnosis and treatment in the control program also achieved the expected effect.