AbstractStarting from the 1990s, the mini/micro-satellites around 50–200kg become one of the research focuses of space industry. Different from the mini-satellites developed at early ages, modern mini/micro-satellites widely incorporate micro-electronics and micro-mechanisms, emphasizing multi-functionality and system integration. As a result, they have relatively high power/volume ratio. Also, to reduce the fuel consumption, the application of micro-electrical propulsion systems on mini/micro-satellites is increasing, which pushes the requirement for electrical power even higher.It is hard for the surface mounted solar cells and stationary solar arrays which were widely used by micro-satellites at early ages to satisfy these elevating power requirements of modern mini/micro-satellites. In response to these requirements, Solar Array Drive Assemblies (SADA) which used to be standard equipments of large spacecrafts have gradually been incorporated in the mini/micro-satellites to rotate the solar arrays for maximum sunlight acquisition, and tremendously reduce the size and mass of the solar arrays.Lately, a new micro-SADA with integrated mechanisms and electronics has been developed by Beijing Institute of Control Engineering. This SADA features:Mechanisms and electronics integrated in one capsule instead of the separate mechanisms and electronic boxes as in large spacecrafts.High torque/weight ratio stepper motor & high precision mini-transmission.Long life high power/weight ratio multi-channel slip ring.High reliability measures against severe mechanical, electrical and thermal conditions.This SADA has gone through functional test, mechanical tests (vibration, acceleration, and shock, etc.), thermal-vacuum cycling test, and electromagnetic compatibility test, and demonstrated excellent functionality. The design as well as the development and test processes is summarized in this paper.
HighlightsA micro-mechatronic SADA suitable for mini/micro-satellites is developed.The SADA has high torque/weight ratio, high power/weight ratio & high reliability.Micro-slip rings, motor, harmonic drive and angular sensor are developed.Simulation & mechanical, thermal, and EMC tests confirmed its robustness in space.
Development and validation of a mechatronic solar array drive assembly for mini/micro-satellites
Acta Astronautica ; 134 ; 54-64
2017-01-31
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Development and validation of a mechatronic solar array drive assembly for mini/micro-satellites
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