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In this paper, a new method of frequency domain feature extraction based on real discrete Fourier transform (RDFT) is proposed. The feature dimension is greatly reduced and pretty good real-time performance is achieved. In addition, to solve the multiple signal classification problem and get a detailed result, a method which adaptively chooses signal combination with the best accuracy and a cascade...
In this paper the stability of multi-periodic repetitive control problem, where two or more periods exist in the reference and disturbance signals, is studied. A Lyapunov analysis is used to prove L2m (0,∞) ∩L∞m(0,∞) stability for a class of passive nonlinear systems subject to a class of nonlinear perturbations. A proof of exponential stability under a strictly...
The Volterra series is associated with so-called weakly nonlinear systems, which can be well described by the first few kernels with the higher order kernels falling off rapidly. This paper is concerned with the convergence analysis of the Volterra series model of a quadratically nonlinear system driven by harmonic inputs and a simple criterion is proposed to provide an estimation of the upper limit...
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