J. Suk et al., EXPERIMENTAL EVALUATION OF THE TORQUE-SHAPING METHOD FOR SLEW MANEUVER OF FLEXIBLE SPACE STRUCTURES, Journal of guidance, control, and dynamics, 21(6), 1998, pp. 817-822
A torque-shaping method using trigonometric series expansion and optim
ization is demonstrated experimentally for a flexible space structure
testbed, The hub-appendage structure is carefully designed and assembl
ed to provide an environment to achieve the rest-to-rest maneuver and
vibration suppression. The reaction wheel assembly is used as an actua
tor to drive the structure, while an encoder, a gyroscope, and a piezo
electric transducer are used as sensors to detect the slew/flexible mo
tion. The experimental testbed is identified by applying an optimizati
on technique using the data of the structure actuated by an impulsive
hub control torque. With the well-adjusted experimental environment, t
he open-loop experiment results using the torque-shaping method match
well with those of the numerical simulations. Furthermore, the closed-
loop experiment results show that precise targeting is achieved in the
presence of various external disturbances. The proposed method will p
rovide an efficient basis for implementing a realizable torque-shaping
strategy for the slewing of flexible space structures.