Configuration design and optimization for near space vehicle actuation system based on power/weight ratio and reliability constraint

This paper studied the actuation system form used in near space vehicle, based on the near space vehicle design demanding of high power/weight ratio and high reliability, this paper proposes a new type dissimilar redundant actuation system (NT-DRAS). It is composed with electro-hydrostatic actuator (EHA) and electro-mechanical actuator (EMA), followed by this, aiming at high power/weight ratio and high reliability, an multi-constraint model is given first, and then multi-constraint based power/weight ratio and reliability optimization process is given. Finally, optimization results in three dimensional space are given to show and analyze that the NT-DRAS can have high power/weight ratio and high mission reliability compared with other actuation schemes.