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|Author(s):||William C. Stone;|
|Title:||Fast Variable-Amplitude Cold Gas Thruster|
|Published:||March 01, 1995|
|Abstract:||A fast response variable amplitude cold gas thruster is described. A laboratory prototype comprised of a piezoelectric stack and an associated microporcessor-based programmable dc power source, a low-loss mechanical displacement amplifier, a high-pressure spring-loaded axial valve, an integral high-pressure valve seat; an expansion nozzle, and a high-pressure gas supply were constructed and tested. The device is designed to operate as a stand-alone unit with a dedicated onboard microcontroller system and onboard energy storage system. Minimum pulse-width resolution (base-to-base) was shown to be 0.98 ms, with a lag time of 0.37 ms relative to the initiation of the drive pulse. Linear amplitude response was achieved beyond a threshold drive voltage of 80 vdc and was maintained through the limit of testing at 240 vdc.|
|Citation:||AIAA Journal of Spacecraft and Rockets|
|Keywords:||cold gas thruster, amplitude control, piezoelectric stack, structural dynamics, predictive models, system identification|
|Research Areas:||Building and Fire Research|
|PDF version:||Click here to retrieve PDF version of paper (1MB)|