Robust Subspace Based Fault Detection

摘要: Abstract Subspace methods enjoy some popularity, especially in mechanical engineering, where large model orders have to be considered. In the context of detecting changes structural properties and modal parameters linked them, subspace based fault detection residual has been recently proposed applied successfully. However, most works assume that unmeasured ambient excitation level during measurements structure reference possibly damaged condition stays constant, which is not satisfied by any application. This paper addresses problem robustness such methods. An efficient subspace-based test derived robust change but also numerical instabilities could arise easily computations. Furthermore, extended Unweighted Principal Component algorithm.