Force-state mapping method is an important method for nonlinear joint parameter identification. This method has attractive features, which make the mode physically meaningful and have high identification accuracy. However, certain parameters are difficult to measure during the actual identification experiment. In order to solve such a problem, a force-state mapping method based on substructure modal synthesis method is proposed here. Furthermore, an iterative correction method based on truncated singular value decomposition (TSVD) regularization is proposed to overcome difficulties associated with term-deficiency and term-redundancy, which occur during the parameter identification process. Simulation results showed high identification accuracy demonstrated by small error between the correction and precise models. Finally, parameter identification was carried out using experiments for the joints of a rolling guide. The experiments verified the effectiveness and correctness of the identification method.
Key words
nonlinear joint /
parameter identification /
force-state mapping method /
TSVD regularization
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References
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