A multi-point force appropriation method based upon a singular value decomposition approachForce appropriation methods aim to provide an estimate for the force pattern required to excite a 'pure' normal mode in a vibration test where multiple exciters are available. In this paper, a new method based upon a Singular Value Decompositon approach is presented. The appropriated force vector which minimizes the in-plane response components while maximizing the required quadrature components is found, subject to a fixed force norm. The method can accommodate more transducers than exciters and also more exciters than effective degrees of freedom. The method is demonstrated upon a six degree of freedom theoretical model and it is shown that an estimate for the effective degrees of freedom can be obtained.
Document ID
19900029920
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Juang, Jer-Nan (NASA Langley Research Center Hampton, VA, United States)
Wright, Jan R. (Queen Mary College London, United Kingdom)