In order to improve the ability of hidden door handle to recognize obstacles and reduce the power consumption of the system, a stable and low power consumption hidden door handle control system is designed. The S12ZVM chip is used as the main control unit, and the motor is controlled through the H bridge circuit. The speed and current information of the motor extracted from the ripple current are used to comprehensively judge whether the obstacle is touched. The controller communicates with the BCM through the CAN bus so that the hidden door handle can be adjusted to enter the sleep mode according to different work scenarios. The experimental results show that the system can effectively reduce the occurrence of misjudgment of obstacles and keep the current in sleep mode below 200μA.
KEYWORDS: Control systems design, Design and modelling, Switching, Control systems, Calibration, Electromagnetism, Device simulation, Angular velocity, Vibration
In order to improve the control stability of air compressor for fuel cell, an air compressor control system based on open loop I/F startup and improved sliding mode observer is designed. MPC5744P is the main control chip and INCA software is the upper computer. Aiming at the stability of the control, the startup and switching process of the open loop I/F is studied, and the angular acceleration difference between the d*q* coordinate system and the actual dq coordinate system is analyzed to get the right value range. In this paper, the traditional synovium observer is studied in the middle and high speed stage, and the piecewise composite function is proposed to replace the sign function with the discontinuous origin, which weakens the high frequency chattering. The simulation results show that the improved sliding mode observer control method can effectively improve the operation stability of the air compressor.
KEYWORDS: Temperature control, Control systems, Design and modelling, Fuzzy logic, Diagnostics, Telecommunications, Control systems design, Temperature metrology, Picosecond phenomena
Aiming at the application defects of traditional temperature control box in vehicle-mounted scenario, a vehicle-mounted temperature control box based on TEC was developed to control ambient temperature and diagnose hardware faults through UDS protocol. Firstly, the simulation analysis of the temperature control model is carried out, and the fuzzy temperature control algorithm based on the dynamic adjustment of the stretching factor is used to achieve a better response effect than the traditional fuzzy control. Then design temperature detection circuit, CAN communication circuit, H bridge drive circuit and ECU program. Finally, the experimental test shows that the system can communicate with the upper and lower machines through the UDS protocol, realize the temperature control and fault detection functions in the variable theory domain, and achieve the expected effect of the system.
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