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443 results on '"Li, Kejie"'

241. PID Control of Miniature Unmanned Helicopter Yaw System Based on RBF Neural Network.

Author

Pan, Yue, Song, Ping, and Li, Kejie

Abstract

The yaw dynamics of a miniature unmanned helicopter exhibits a complex, nonlinear, time-varying and coupling dynamic behavior. In this paper, simplified yaw dynamics model of MUH in hovering or low-velocity flight mode is established. The SISO model of yaw dynamics is obtained by mechanism modeling and system identification modeling method. PID control based on RBF neural network method combines the advantages of traditional PID controller and neural network controller. It has fast response, good robustness and self-adapting ability. It is suitable to control the yaw system of MUH. Simulation results show that the control system works well with quick response, good robustness and self adaptation. [ABSTRACT FROM AUTHOR]

Published
2011
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242. The Cooperative Hunting Research of Mobile Wireless Sensor Network Based on Improved Dynamic Alliance.

Author

Pei, Daming, Song, Ping, Han, Xiaobing, and Li, Kejie

Abstract

The cooperative hunting research of mobile wireless sensor network based on improved dynamic alliance is proposed in this paper. Considering the communication cost, link covering, energy and so on, the improved dynamic alliance mechanism is introduced into the cooperation of multi-mobile sensor nodes to solve the cooperative hunting of single target. Simulation result shows that the cooperative hunting based on dynamic alliance for mobile wireless sensor networks is feasibility. [ABSTRACT FROM AUTHOR]

Published
2011
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244. Design of the Facial Expression Mechanism for Humanoid Robots.

Author

Gao, Junyao, Huang, Qiang, Yu, Zhangguo, Chen, Xuechao, Xu, Wei, Zhang, Weimin, Xu, Qian, Song, Ping, Li, Kejie, Xie, Lin, Guot, Wenjuan, Zou, Renti, Zou, Ziting, and Zhang, Yong

Abstract

This paper introduces a new humanoid robot capable of facial expression modifications. Since the face and its expressions play a significant role for natural communication, the robotic face was developed using highly vivid facial expressions. After having outlined the development of the humanoid robot, we describe the distributed control system. Then, the design of the robotic face is presented. Finally, the typical facial expressions and walking patterns are demonstrated via experiments. [ABSTRACT FROM AUTHOR]

Published
2010
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245. Design for a Dual-Arm Space Robot.

Author

Li, Hui, Huang, Qiang, Dong, Que, Li, Chen, He, Yu, Jiang, Zhihong, Li, Yue, Lv, Peng, Xie, Lin, Chen, Xiaopeng, and Li, Kejie

Abstract

With the development of space technology, plenty of work for space assembly and maintenance should be carried out. However, these tasks are dangerous and high cost for astronauts. It is necessary to develop a space robot to complete these dangerous space operations. In this paper, we present a method of the design of dual-arm space robot, including the mechanism, integrative joint, vision system and vision-based climbing trajectory plan. Finally, the joint control performance experiment is provided. [ABSTRACT FROM AUTHOR]

Published
2010
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