High-speed Rotating Mirror Camera Precision Turbine Drive

As high-speed photographic equipment, the High Speed Rotating Mirror Camera can easily extend the capability of human eyes, with the pS level's time resolution ability. The camera is widely used in many fields, such as nuclear explosion mechanics, high-speed object collisions, plasma experiments, the nature of radiation body radiation detection, precision physics experiments and etc. It is a powerful tool to research the movement of objects and the microscopic world. With more detailed studies have been carried out, the time resolution ability of camera is increasingly required. Considering the ability is tightly related to rotation rate of the rotating mirror, it is important to improve the rotation rate.Nowadays, as a very effective way to drive the rotating mirror, air turbine driven has been widely used. However, most turbine drivers are adjusted manually, which bring low control precision and low success rate of experiments. In this dissertation the high precision turbine driver has been designed based on domestic and foreign research. The driver's research and design was carried out from two aspects, software and hardware.The hardware includes gas channel and hardware circuit. The gas channel section contains filter device and regulator device of the compressed air. The filter device uses three precision filters to ensure the safety of precision pneumatic components. In the regulator device, an innovative design with double gas channels effectively enhanced the dynamic range of the driving speed. Control accuracy was effectively increased by a customized electric proportion valve. Circuit section is composed of the ADC module, DAC module, rotation speed signal receiver module, relay module, power module, RS232 communication module and CAN communication module. The adoption of high-reliability chip XC164, the optical isolation technology and relay isolation technology ensured the good stability and anti-interference of the whole system. The communication of RS232 and CAN make the system with advanced feature and backward compatibility feature at the same time.The software contains implementation of the interface modules and control algorithm. Interface modules were used to implement the reception of the pressure signal and rotating mirror speed signal, the display of current output pressure, the output of pressure data for electric proportion valves and control signals for solenoid valves. In control algorithm, the intelligent controller which includes fuzzy controller and PID controller was designed in this dissertation. The parameters of PID controller can be modified online through the fuzzy control algorithm.Experimental results show that rotating-mirror can reach a steady-state between 30,000 and 300,000 rev/min while steady-state error below 0.5%. The turbine driver has been used in the FJZ-250 rotating mirror framing camera synchronization style shooting experiment. In April 2010, the system successfully passed the technical appraisal of the General Armament Department (The device is at the leading domestic level).