Journal of shanghai Jiaotong University (Science) ›› 2014, Vol. 19 ›› Issue (2): 146-154.doi: 10.1007/s12204-014-1483-9

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Dynamic Model of Underwater Snake-Like Robot Using Kane’s Method

Dynamic Model of Underwater Snake-Like Robot Using Kane’s Method

YANG Ke (杨 柯), WANG Xu-yang* (王旭阳), GE Tong (葛 彤), WU Chao (吴 超)   

  1. (School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  2. (School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Online:2014-04-30 Published:2014-04-29
  • Contact: WANG Xu-yang(王旭阳) E-mail:wangxuyang@sjtu.edu.cn

Abstract: In this paper, a dynamic model for an underwater snake-like robot is developed based on Kane’s dynamic equations. This methodology allows construction of the dynamic model simply and incrementally. The partial velocity is deduced. The forces which contribute to dynamics are determined by Kane’s approach. The generalized active forces and the generalized inertia forces are deduced. The model developed in this paper includes inertia force, inertia moment, gravity, control torques, and three major hydrodynamic forces: added mass, profile drag and buoyancy. The equations of hydrodynamic forces are deduced. Kane’s method provides a direct approach for incorporating external environmental forces into the model. The dynamic model developed in this paper is obtained in a closed form which is well suited for control purposes. It is also computationally efficient and has physical insight into what forces really influence the system dynamics. The simulation result shows that the proposed method is feasible.

Key words: underwater snake-like robot| dynamic model| Kane’s dynamic equations| hydrodynamic forces

摘要: In this paper, a dynamic model for an underwater snake-like robot is developed based on Kane’s dynamic equations. This methodology allows construction of the dynamic model simply and incrementally. The partial velocity is deduced. The forces which contribute to dynamics are determined by Kane’s approach. The generalized active forces and the generalized inertia forces are deduced. The model developed in this paper includes inertia force, inertia moment, gravity, control torques, and three major hydrodynamic forces: added mass, profile drag and buoyancy. The equations of hydrodynamic forces are deduced. Kane’s method provides a direct approach for incorporating external environmental forces into the model. The dynamic model developed in this paper is obtained in a closed form which is well suited for control purposes. It is also computationally efficient and has physical insight into what forces really influence the system dynamics. The simulation result shows that the proposed method is feasible.

关键词: underwater snake-like robot| dynamic model| Kane’s dynamic equations| hydrodynamic forces

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