Polynomial Matrix Approach to Independent Component Analysis: (part Ii) Application

This paper proposes two types of application of the method given in the paper (PART I). The first is suppression of disturbance with unknown dynamics in control systems. Assuming that a disturbance enters into a system independently of the control input signals, the method makes it possible to identify a denominator polynomial matrix of the disturbance dynamics, and then to design an H∞ controller suppressing the effect of the disturbance. Numerical simulation is carried out to verify the effectiveness of this approach. The second is fault detection of mechanical systems subject to vibration from the environment. The vibration source is assumed to be unmeasurable, and yet the method achieves detection of a parameter change of the system due to fault. To test the effectiveness of the second approach, experiment with a flexible structure has been carried out. Copyright c ©2005 IFAC.