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The test equipment is used to measure the deformation of the shell of the phase change energy storage device during the melting and solidification of the phase change material and to monitor whether bulging occurs to ensure its structural safety. When the test device is used to simulate different orbit operating environments, due to its structure and process characteristics, this temperature control process has time lag problems, non-linear problems and various unknown interferences using conventional control methods. It is difficult to obtain satisfactory static and dynamic performance. To this end, a modified Smith prediction compensation control method is designed to improve the control speed and robustness by introducing a Smith predictor in the fuzzy PID control loop to compensate the time lag of the control in advance. Finally, MATLAB is used to program and simulate the system with the modified Smith prediction compensation control method, and the results show that the modified Smith prediction compensation control method is more superior compared with the traditional PID control method and fuzzy control method.
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