Control of flexible spacecraft structures using H-infinity wave absorbing control
Strong, Ronald E.
MetadataShow full item record
This work studies the use of a wave absorbing control law for vibration suppression of flexible spacecraft structures. A major advantage of this method is that it does not involve truncation into a finite dimensional mathematical model. A closed loop scattering matrix was derived which gives the relationship between incoming waves, outgoing waves, sensor, and actuator. The control law was determined by minimizing the H-infinity norm of this matrix. The control law was applied to the Naval Postgraduate School's Flexible Spacecraft Simulator (FSS) for vibration suppression. The simulator's flexible beam was controlled using piezoelectric ceramic wafers as sensors and actuators. The H-infinity wave absorbing controller contributed significant damping to the structure, especially at the first mode of I Hz Therefore, wave absorbing control and piezoceramic sensors and actuators offer a viable approach for vibration suppression of space structures.
Approved for public release, distribution unlimited
Showing items related by title, author, creator and subject.
Vibration Reduction for Flexible Spacecraft Attitude Control Using PWPF Modulator and Smart Structures Song, G.; Agrawal, B.N. (1999);This paper presents a new approach to vibration reduction of flexible spacecraft during attitude control by using Pulse Width Pulse Frequency (PWPF) Modulator for thruster firing and smart materials for active vibration ...
Meyer, J.; Harrington, W.; Agrawal, B.N.; Song, G. (1998);This paper presents the results of positive position feedback (PPF) control and linear–quadratic Gaussian (LQG) control for vibration suppression of a ﬂexible structure using piezoceramics. Experiments were conducted on ...
Song, G.; N. Buck; Agrawal, B.N. (1997);Minimizing vibrations of a exible spacecraft actuated by on-off thrusters is a challenging task. This paper presents the rst study of pulse-width pulse-frequency modulated thruster control using command input shaping. ...