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在卫星的密封舱内装有各种精密的科学探测仪器和实验设备，为了保证这些仪器和设备的正常工作，需要在卫星的密封舱内创造合适的压力环境条件。本文介绍了一种返回式科学探测和实验卫星的密封舱压力控制系统，采用自动向舱外排气和向舱内供气的主动式压力调节方法，在卫星发射上升段、轨道运行段及返回前，自动调节密封舱内的压力在规定的范围内。该系统重量轻、功耗小、控制精度高、可靠性高。１９８７年９月第一次被成功地应用于返回式卫星上，以后又多次参加卫星飞行试验，均获得圆满成功。它是中国航天器上第一个实际使用的密封舱主动式压力控制系统
Satellite satellites are equipped with sophisticated scientific instruments and experimental equipment. In order to ensure the normal operation of these instruments and equipment, it is necessary to create suitable pressure environment conditions in the sealed capsule of satellites. This paper presents a sealed capsule pressure control system for return-type scientific exploration and experimental satellites using an active pressure regulation method that automatically exhausts into and exhausts into the tank. During the satellite launch phase, the orbital segment and the return Before the automatic adjustment of the pressure inside the sealed capsule within the specified range. The system is light weight, low power consumption, high control precision and high reliability. In September 1987, it was successfully applied to return satellites for the first time and participated in satellite flight tests on numerous occasions, all of which were completely successful. It is the first practical use of a sealed capsule active pressure control system on a Chinese spacecraft