Simulation Of Hybrid Electric Vehicle Air Conditioning System And Optimization Of Algorithm Based On ADVISOR

As people increasingly attach importance to environmental resources, automobileindustry is gradually to the low carbon and low emission direction. Such as electric cars withless energy consumption, low emission, low noise, gradually popular. But because of itsenergy can mostly be provided by the battery, so the system has high efficiency on the car.The air conditioning system is the second energy dissipation devices of large passenger car,its efficiency will affect the level of vehicle performance and range, so it is very important toestablish the air conditioning model for electric car, and develop a control algorithm of energysaving.The hybrid electric vehicle automatic air conditioning system is studied in this paper, themain work and contributions are as follows:1. The characteristics of the electric car automatic air conditioning system are studied. Acomponent matching scheme of automatic air conditioning is proposed. The displacement andshaft power of the compressor are determined by calculating the thermodynamic cycle of thecooling process.2. The characteristics of fuzzy control algorithm and PID control algorithm are studied.At the same time, the application scope is also studied. The fuzzy-PID compound controlmethod of electric compressor speed is established. This method combined the principle offuzzy control with PID control. It maintained the advantages of flexible and adaptable. And itset the high precision of PID control. Finally, the temperature of the passenger compartment isadjusted effectively.3. The design of automatic air conditioning function module is studied. The electriccompressor model, the heat load of the quasi steady state model, the heat exchange modelbased on refrigeration cycle thermodynamic state change are established. Through the establishment of a series of functional components of the model, the problem of power controlsystem and temperature effect t are solved.4. The in-vehicle network communication based on CAN bus is studied. Through CANbus, this paper ultimately determined to write data acquisition program by LabVIEW. Finally,the data of experiment are collected successfully by Kvaser.5.The second development platform of electric passenger car model is set up. By thesecond development of simulation software Advisor2002, this paper did a real vehicleexperiment. This experiment showed that the air conditioning model can complete thesimulation of car air conditioning system. Finally, the paper made a comparative analysisabout a optimized control by the secondary development. The analysis indicated that thefuzzy-PID compound control method has not only obvious energy saving effect but alsohigher accuracy.