| dc.description.abstract | With the rapid development of the domestic space industry, the demand for satellite assembly and related components continues to increase. In order to ensure that satellites and related objects can withstand extreme environments and maintain normal operation in space, all electronic, mechanical, and hardware equipment that needs to be sent into space must undergo thermal vacuum testing.
This test is simulating the space environment by reducing the atmospheric pressure to below 0.01 Pa.The environmental temperature reach high and low extremes, and it is maintained for a period of time. This process is repeated consecutively for multiple cycles.
In the temperature maintenance phase, we use a temperature controller that regulates the temperature of the heat exchange plate through a temperature control tube. However, there might be a slight deviation between the actual temperature of the objects and the set oil temperature because the heat is conducted through contact. Additionally, there might be a time delay in temperature transmission between them.
Besides the testing process requires human intervention to ensure that the temperature of the test object remains within the specified range. The entire process, including recording, temperature adjustment settings, and other tasks, relies on the involvement of operators. The operators have to observed temperature measurements and adjust commant of the target temperature. They also need to record the duration of temperature maintenance to ensure compliance with testing requirements. However, this manual testing approach not only incurs significant labor costs but also carries risks due to variations in operators′ skills, experience, and familiarity with the process. Errors or lack of experience among operators can impact the overall testing schedule and efficiency.Furthermore, the rapid increase in thermal vacuum testing demands exacerbates the aforementioned issues across various aspects.
Therefore, this paper proposes the establishment of an automated thermal vacuum testing system. It involves writing programs to automate the management of the testing process, estimate the testing completion time, and display a progress bar. By reading temperature measurements from thermocouples inside the thermal vacuum chamber as output and setting target temperatures as input. Design compensator and controllers to optimize temperature control. The goal is to achieve automated temperature control, liberating human intervention and enhancing testing efficiency.The final result achieves temperature stability within a range of ±1°C during the temperature maintenance phase, meeting the commonly used specification of ±3°C. | en_US |