Fuzzy control research on the active thermal control system for planet spacecraft

The active thermal control system for planet spacecraft was researched, taking example for Mars Pathfinder. Fractal microchannel net heat transfer with more heat transfer efficiency and less pressure drop was used to transfer excess heat generated in the electronics shelf to Freon-11 working fluid, basing on the schematic of a mechanically pumped single phase Freon cooling loop, and Fuzzy control to adjust to the electronics temperature. A dynamic model for the system was set up by the method of lumped parameter with physical simplification and hypothesis, and simulation was done. The result shows that this system with fuzzy control could control the electronics temperature effectively.