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Abstract:
Identification of dynamic natural frequencies and viscosity damping
coefficient for a large-scale structure in practical working condition
is a very difficult problem. A new system identification method for the
kind of engineering problems is presented, using nonlinear modeling and
wavelet transform. The dynamic natural frequency and damping for the
shaft system of a water turbine are successfully estimated from field
measured signal using this method. Through comparing simulation results
to theoretic results, the adaptability and validity of the method are
here proved.
Key words:
System
identification Dynamic natural frequencies Viscosity damping
coefficient Large-scale structure Water turbine
CLC No: O342
国家教委“跨世纪优秀人才计划”基金资助项目. Received 20000807,
received in revised form 20001230
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