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This paper mainly studies the speed control for a permanent magnet synchronous motor system. The relationship between the reference quadrature axis current and the speed output is approximately considered as a second-order model. Based on this second-order model, a composite control strategy is adopted, where a continuous sliding mode controller is designed for the speed regulation without chattering...
This paper presents an improved bag-of-words (BoW) framework for detecting near-duplicates of images on the Web and makes three main contributions. Firstly, based on the SIFT feature descriptors, Locality-constrained Linear Coding (LLC) with the spatial pyramid is introduced to encode features. Secondly, a weighted Chi-square distance metric is proposed to compare two histograms, with an inverted...
This paper concerns reduced-order stable controllers in a unified way for two typical examples of underactuated robots called the Acrobot and the Pendubot which are two-link planar robots moving in a vertical plane with a single actuator at joints 1 and 2, respectively. The main contributions of this paper are threefold. First, using properties of the mechanical parameters of two-link planar robots,...
In this paper, the problem of global asymptotic stability of a class of uncertain nonlinear system with input constraint is considered by using the development of the adding a power integrator technique. And in order to analyze the effect of the input constraint, the auxiliary design system is used. In addition, if the system satisfies some conditions, the global finite time stability of the nonlinear...
In this paper, the problem of global asymptotic stability of a class of uncertain nonlinear system with input constraint is considered. And by using the development of the adding a power integrator technique, an auxiliary design system is used to analysis the effect of the input constraint. In addition, physics constraints of virtual control laws are also considered when pi>1. Finally, simulations...
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