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In view of the problems of route selection and driving stability of intelligent vehicle in the process of turning, a state model of intelligent vehicle turning system control based on Kalman filter is proposed. Taking intelligent vehicle as the research object, according to the route of intelligent vehicle passing through a certain bend at uniform speed, the corresponding state transition model of intelligent vehicle's speed and position is established, and the state model of intelligent vehicle's bend system is analyzed, and the system state equation of intelligent vehicle in the process of bend movement based on Kalman filter is obtained. According to the state equation of the system, it can effectively monitor the speed, position and trajectory of the intelligent vehicle on the bend. Combining with Kalman filter algorithm, it can effectively reduce the noise of the control process and observation noise. It can be used to achieve more stable and accurate control of the intelligent vehicle in the bend movement.

Based on the important role of high frequency pulse power supply in the process of electro hydraulic beam processing, aiming at the particularity of the processing technology, an innovative scheme to realize the frequency modulation duty ratio is proposed.According to the high voltage high frequency adjustable pulse power requirements, design of control circuit and frequency generator, it is derived that element parameters meet the design requirements and the physical production, the use of power electronic equipment control experimental platform is built, the frequency signal waveform, voltage duty ratio, IGBT on-off control for a series of experiment.The experimental results show that the developed frequency pulse width modulator and drive circuit can drive the full bridge circuit of IGBT, and can control the light bulb (load) under the high frequency, and the rationality of the device and the design are verified.

Based on the important role of high frequency pulse power supply in the process of electro hydraulic beam processing, aiming at the particularity of the processing technology, an innovative scheme to realize the frequency modulation duty ratio is proposed.According to the high voltage high frequency adjustable pulse power requirements, design of control circuit and frequency generator, it is derived that element parameters meet the design requirements and the physical production, the use of power electronic equipment control experimental platform is built, the frequency signal waveform, voltage duty ratio, IGBT on-off control for a series of experiment.The experimental results show that the developed frequency pulse width modulator and drive circuit can drive the full bridge circuit of IGBT, and can control the light bulb (load) under the high frequency, and the rationality of the device and the design are verified.