The circuit design and experiment research of aircraft electronic oxygen regulator

Oxygen regulator was the core component of the Oxygen Supply System (OSS) which supplied enough oxygen or mix-oxygen to pilots by the oxygen supply laws. By analyzing the working principle and the control law of the OSS, a new control circuit and software were designed for the new type aircraft electronic oxygen regulator (AEOR). Based on the bottom-up principle, the processes from chip selection to control law optimum were introduced. After these, the methods that building the experiment system of the AEOR were introduced, and the validation experiments on the principle were carried out for the AEOR. The ground simulated experiment for the AEOR was completed according to the actual using circs. By analyzing the influences of the motor speed, the inlet pressure, the flight altitude, the aircraft g-load et al. on the capability of the AEOR, the control program was optimized to adapt different flight states. The experiment results indicated that the controller with the AVR singlechip could control the AEOR accurately and the control program had good readability and efficiency. On the aspect of the breathing resistance and the system undulation, the experiment results of the AEOR were excelled to the existing technical index. By the comparison between the experimental results of the AEOR and the aircraft mechanical oxygen regulator (AMOR), the AEOR showed better performance than the AMOR on the response speed and the regulation precision. The AEOR achieved the design request for the new aircraft Oxygen Supply System (OSS). The last, by the analysis of some problems found in the experiments, such as the block of the electromotor moving, the fluctuation of the outlet pressure et al., some effective resolves were worked out and it was important for the design and improvement of the aircraft electronic oxygen regulator (AEOR). Compared with the traditional AMOR, the AEOR is smaller and lighter, and the electrical controller can supply oxygen to pilot more quickly and accurately. It must replace the AMOR in the future.