Affiliations: General Motors Corporation, Noise &
Vibration Performance & Center, 3300 GM Road, Milford, MI 48380, USA.
E-mail: [email protected]
Abstract: A new state space method is presented for modal identification of a
mechanical system from its time domain impulse or initial condition responses.
A key step in this method is the identification of the characteristic
polynomial coefficients of an adjoint system. Once these coefficients are
determined, a canonical state space realization of the adjoint system and the
system's modal parameters are formulated straightforwardly. This method is
conceptually and mathematically simple and is easy to be implemented. Detailed
mathematical treatments are demonstrated and numerical examples are provided to
illustrate the use and effectiveness of the method.