Adjusted Least Squares Approach for Diagnosis of III-Conditioned Compliant Assemblies  

Oleh:

Rong, Q. ; Ceglarek, D. ; Shi, J.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Manufacturing Science and Engineering vol. 123 no. 3 (Aug. 2001), page 453-461.
Topik: least squares method; least squares approach; diagnosis; conditioned; compliant assemblies

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ93.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Least squares (LS) estimation has been extensively used for parameter identification and model - based diagnosis. However, if III - conditioning is present, the LS estimation approach tends to generate imprecise results and thus impacts the diagnostic performance. In this paper, an adjusted least squares approach is proposed to deal with the III - conditioning problem in the diagnosis of compliant sheet metal assembly process. The adjusted LS approach is able to overcome the III - conditioning and give precise results for certain linear combinations of the faults. Simulations and industrial case study are conducted to compare the diagnostic performance of the adjusted and regular LS approach. In addition, a two - stage assembly model is developed for further fault isolation with inclusion of additional measurement information.

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