An experimental and analytical synthesis of controlled structure design
An overview of the experimental and analytical results from a controlled structure technology development project are reported and discussed. A controller was designed to reject disturbances from a lightly damped truss structure, in which twenty structural modes lie within the controller bandwidth. The signals from four strain sensors are fed back through an eighteenth order dynamic controller into four stress actuators (not collocated with the sensors) to reduce the vibration of the structure. Five independent performance measures are simultaneously minimized to synthesize the controller. An optimal projection controller, designed from a 58th order state space model, experimentally reduces the structural vibration by up to 65% without saturating the actuators and without destabilizing high frequency modes. By comparing analytical and experimental performance predictions, the robustness of the controller to model imperfections is demonstrated. The overall procedure reported here demonstrates a complete analysis, control synthesis, and test of a realistic controlled structure. 27 refs., 6 figs., 5 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6477881
- Report Number(s):
- SAND-88-2377C; CONF-8904112-1; ON: DE89006506
- Country of Publication:
- United States
- Language:
- English
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