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Principal curves are curves which pass through the `middle?? of a data cloud. They are sensitive to variances of data clouds. In this paper, we propose a robust principal curve model - Correntropy based Principal Curve (CPC) model, based on maximum correntropy criterion (MCC). The CPC model approximate the principal curve with k-segments of polygonal line. Employing the half-quadratic technique, the...
The disturbance-compensation of ball screw servo system composed of AC permanent magnet synchronous motor (PMSM) is studied. The disturbance which is produced by variation of system parameters, machinery nonlinear etc, is estimated, based on the derived model, and which is fed back to input port as a compensation signal. The simulation and experimental results show that the ball screw servo system...
A new cooperative error was defined firstly and a new cooperative model of the vehicle was developed for the vehicle's steering antilock braking stability fields. A new two-level fuzzy robust cooperative control system was proposed. The architecture was composed with the execution layer and the cooperation layer. The uncertain parameters deteriorate the performance of the systems, so the yaw moment...
This paper presents a novel optimal watermark decoding algorithm of multibit multiplicative watermarks using Bessel k form of density function (BKF). In the proposed algorithm, the wavelet coefficients of detail subband are assumed to obey BKF, the classical spread spectrum watermarking is used for watermark embedding, the optimal multi-bit watermark decoding comes down to a maximum likelihood (ML)...
In this paper, a characteristic model based longitudinal control design for the trans-aerosphere vehicle X-34 in its transonic and hypersonic climbing phase is proposed. The design is based on the dynamic characteristics of the vehicle and the curves it is to track in this climbing phase. Through a detailed analysis of the aerodynamics and vehicle dynamics during this climbing phase, an explicit description...
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