Huazhong Xu

Wuhan University of Technology, Wu-han-shih, Hubei, China

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Publications (2)0 Total impact

  • Huazhong Xu, Pei Lv, Lei Meng
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    ABSTRACT: Real-time people flow information is very useful for security application as well as people management. This paper presents a counting system which consists of four modules: foreground extraction, head-shoulder component detection, tracking and trajectory analysis. Firstly, in order to reduce computation costs and cope with various complex surveillance situations for foreground extraction, an adaptive components number selection strategy for mixture of Gaussians model is proposed. Secondly, pedestrians are detected by their head-shoulders, because this part is less varied and less likely occluded from a downward-slope view. Thirdly, each pedestrian is tracked through consecutive frames using the Kalman filter techniques and cost function. Finally, the resulting trajectories are analyzed to count people entering or leaving the scene. Experiment results indicate that our method can be applied in actual application.
    Computer Design and Applications (ICCDA), 2010 International Conference on; 07/2010
  • Huazhong Xu, Zilin Li
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    ABSTRACT: A Fuzzy Controller for the compensation of the Direct-axis current component in the flux-weakening control system of the Permanent Magnet Synchronous Motor (PMSM) is proposed in this paper. The output torque of PMSM falls down when it operates in the high-speed as the reason of its parameters variation. In order to minimize the influences from the armature reaction, the quadrature-axis current reference component and its deviation with the detection value are chose as the inputs of the Fuzzy controller, and output of the Direct-axis compensation value is obtained as the setting value of the current regulator. The proposed control method is implemented in the experimental platform based on TI DSP chip, the experiment results demonstrate that the Fuzzy control rules and parameters adopted in this paper can improve the performance of torque effectively.
    Computer Design and Applications (ICCDA), 2010 International Conference on; 07/2010