A large-volume automatic inflation and deflation control method for satellites based on dual feedback of pressure and temperature

Abstract

The invention discloses an automatic inflation and deflation control method based on dual feedback requirements of pressure and temperature. According to the method, the opening degree of a pressure adjusting proportional valve in an automatic inflation and deflation system is adjusted and the inflation and deflation speed is automatically controlled according to the joint action of a pressure feedback control model and a temperature feedback control model; if pressure reaches a set upper limit (lower limit) or temperature reaches a set upper limit (lower limit), inflation (deflation) pauses; and when temperature returns to a safety threshold (temperature), inflation and deflation continue. In the automatic inflation and deflation process, manual pressure adjustment and control over valves are not needed, whether the temperature lags behind or exceeds the limits or not does not need to be judged according to experience, only corresponding parameters need to be set in the system, inflation and deflation are automatically performed according to the program, the dual requirements of pressure feedback and temperature feedback are both taken into consideration, result data showing that the temperature does not exceed the limits are guaranteed, and process data showing that the pressure does not exceed the limits are guaranteed.

Description

technical field [0001] The invention relates to a large-volume satellite automatic filling and deflation control method, in particular to an automatic filling-discharging method for satellite large-volume products such as tank gas cylinders (with a volume of more than 50 liters) that have dual requirements of pressure upper limit and temperature feedback air control method. Background technique [0002] In the satellite assembly AIT (Assembly Integration and Testing) process, the satellite leak detection work accounts for 10% to 20% of the time, and the spacecraft's inflation and deflation operations in the leak detection work account for almost two-thirds of the time; Moreover, with the continuous development of aerospace technology, the demand for high-reliability and long-life satellites is becoming increasingly urgent, and the requirements for spacecraft leak detection work are gradually increasing, and a very important part of it is the spacecraft leak detection. Requi...

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Problems solved by technology

[0005] The above methods are aimed at different satellite requirements, respectively for pressure upper limit requirements, temperature upper limit requirements, and pressure change rate & temperature upper limit requirements, but for some satellite products, the large volume system has double upper or lower limits for temperature and pressure during the charging and deflation process. At present, there is no corresponding automatic inflation and deflation control method. Therefore, to realize the automatic control of the inflation and deflation process under this requirement, it is necessary to control the two parameters of temperature and pressure during the inflation and deflation process of related satellite products to ensure these two parameters. Do not exceed the upper limit or lower limit, the control algorithm must be strictly matched according to the product object, and the upper limit or lower limit parameters must be set according to the requirements

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