Title :
Transient performance investigation of a self-driven adaptive thermostatic valve for single-phase space thermal control Loop
Author :
Jin Wang ; Yun-ze Li ; Jun Wang
Author_Institution :
Sch. of Aeronaut. Sci. & Eng., Beihang Univ., Beijing, China
Abstract :
A novel thermal control system which adopt a self-driven adaptive thermostatic valve for single-phase space thermal control Loop (SSTCL-SATV) has been proposed to improve the thermal control adaptability and energy-saving requirement of spacecraft. This self-driven adaptive thermostatic valve can realize the automatic proportional control of flow and temperature by applying the linear expansion or contraction characteristic of sensitive wax. The mathematic model of SSTCL-SATV such as SATV, radiator, and heat source are established for predicting temperature dynamic performance of the thermal control system by lumped parameter method. The transient response of temperature under different sensitive wax parameters such as layout, phase-change range, time constant and temperature delay are presented by numerical simulation to analyze the control effect of SATV by comparing the control overshoot, settling time and finial offset values. These results will supply a design reference of SSTCL-SATV to adapt the complicated space environment.
Keywords :
adaptive control; proportional control; space vehicles; thermal variables control; valves; waxes; SSTCL-SATV; automatic proportional control; contraction characteristics; control overshoot; finial offset values; linear expansion; lumped parameter method; numerical simulation; self-driven adaptive thermostatic valve; sensitive wax; sensitive wax parameters; single-phase space thermal control Loop; single-phase space thermal control loop; space environment; spacecraft energy-saving; temperature dynamic performance prediction; temperature transient response; thermal control adaptability; thermal control system; transient performance investigation; Delays; Fluids; Heating; Temperature distribution; Temperature sensors;
Conference_Titel :
Advanced Intelligent Mechatronics (AIM), 2013 IEEE/ASME International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-5319-9
DOI :
10.1109/AIM.2013.6584123