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The problem of fault diagnosis for a class of nonlinear system is investigated via the hybrid method of observer-based approach and homogeneous polynomials technique. In the design of the estimator, a new structure with homogeneous polynomial form has been proposed, which is able to deal with the fault diagnosis issue for multi-instant case. A quintessential tunnel diode circuit example is given to...
The proposed observer could estimate AUV's low frequency motion and environmental disturbance force from the synthetical signals which include the low frequency motion signals, high frequency motion signals and measure noise from the sensors. The nonlinear observer is proved global exponential stability and passive. Passivity theory is used in designing the tuning parameters of the observer. The observer...
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