Abstract
We have proposed continuous and discrete time resolved acceleration control methods for underwater vehicle-manipulator systems and the effectiveness of the control methods have been shown by experiments. In this paper, we propose a digital type disturbance compensation control method based on the RAC method considering singular configuration of manipulator. Experimental results show the effectiveness of the proposed method.
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- Σ U :
-
inertial coordinate frame
- Σ i :
-
link i coordinate frame (i = 0, 1, 2; link 0 means base)
- U R i :
-
coordinate transformation matrix from Σ i to Σ U
- p e :
-
position vector of end-tip of manipulator with respect to Σ U
- p 0 :
-
position vector of origin of Σ0 with respect to Σ U
- v i :
-
linear velocity vector of Σ i with respect to Σ U
- ω i :
-
angular velocity vector of Σ i with respect to Σ U
- ϕ i :
-
relative angle of joint i
- x 0 :
-
position and attitude vector of Σ0 with respect to Σ U (= [p T0 ϕ 0]T)
- ϕ :
-
relative joint angle vector (= [ϕ1 ϕ2]T)
- m i :
-
mass of link i
- l i :
-
length of link i
- V i :
-
volume of link i
- D i :
-
width of link i
- \( C_{D_i } \) :
-
drag coefficient of link i
- ρ :
-
fluid density
- a i :
-
position vector from joint i to center of gravity of link i with respect to Σ U
- b i :
-
position vector from joint i to center of buoyancy of link i with respect to Σ U
- E :
-
identity matrix
- g :
-
gravitational acceleration vector
- F j :
-
thruster force (j = 1, 2, 3)
- R :
-
length form origin of Σ0 to thruster
References
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This work was presented in part at the 12th International Symposium on Artificial Life and Robotics, Oita, Japan, January 25–27, 2007
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Yatoh, T., Sagara, S. & Tamura, M. Digital type disturbance compensation control of a floating underwater robot with 2 link manipulator. Artif Life Robotics 13, 377–381 (2008). https://doi.org/10.1007/s10015-008-0585-6
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DOI: https://doi.org/10.1007/s10015-008-0585-6