Parameter testing for lattice filter based adaptive modal control systemsFor Large Space Structures (LSS), an adaptive control system is highly desirable. The present investigation is concerned with an 'indirect' adaptive control scheme wherein the system order, mode shapes, and modal amplitudes are estimated on-line using an identification scheme based on recursive, least-squares, lattice filters. Using the identified model parameters, a modal control law based on a pole-placement scheme with the objective of vibration suppression is employed. A method is presented for closed loop adaptive control of a flexible free-free beam. The adaptive control scheme consists of a two stage identification scheme working in series and a modal pole placement control scheme. The main conclusion from the current study is that the identified parameters cannot be directly used for controller design purposes.
Document ID
19830060503
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sundararajan, N. (NASA Langley Research Center Hampton, VA, United States)
Williams, J. P. (NASA Langley Research Center Hampton, VA, United States)
Montgomery, R. C. (NASA Langley Research Center Flight Dynamics and Control Div., Hampton, VA, United States)