Underwater Robots - Gianluca Antonelli.pdf

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9.3 Experimental Set-Up at the Virginia Tech 235 9.3 Experimental Set-Up at the Virginia Tech Figure 9.5 reports the small AUVs developed at the Virginia Polytechnic Institute &State University toperform adaptive sampling with multiple underwater vehicles. The AUVs have been designed in order to be very small in size and relatively cheap [132]. Fig. 9.5. Platoon of AUVs developed at the Virginia Polytechnic Institute &State University (courtesy of D. Stilwell) One ofthe use of the platoon will be the adaptive sampling of environmental processes, i.e., the mapping and tracking of marine processes. In [66], C.J. Cannell and D.J. Stilwell compare two estimation methods in different conditions, moreover, the benefit achieved using more than one vehicles is also discussed. Reporting from [66], Figure 9.6 shows simulation results of two AUVs estimating the center of mass of aneutral dye tracer. In [229] some preliminary experimental results have been reported by J. Petrich, C.A. Woolsey and D.J. Stilwell using one of the vehicles. However, since absolute positions are required to prove the proposed algorithm, the vehicle is commanded to move at the surface and its position is measured with asampling time of 30 s.
236 9. Coordinated Control of Platoons of AUVs Fig. 9.6. Simulation of two AUVs estimating the center of mass of aneutral dye tracer (courtesy of D. Stilwell, Virginia Polytechnic Institute &State University) 9.4 Conclusions In this Chapter avery quickoverview on control strategy formultipleAUVs is given. The so called kinematic control has been detailed reporting simulation results. Some preliminary experimental results, performed atthe Virginia Tech University have been shown. Some interesting issues concern fault tolerant capabilities of the platoon, scalability ofthe algorithm, and local sensing aspects.
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Springer Tracts in Advanced Robotic
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Gianluca Antonelli Underwater Robot
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Editorial Advisory Board EUROPE Her
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Elalocomotiva sembrava fosse un mos
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Acknowledgements The contributions
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Preface to the Second Edition The p
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XVIII Preface to the First Edition
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XX Preface tothe First Edition mani
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XXII Notation η q =[η T 1 ε T η
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XXIV Notation ˜x error variable de
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XXVI Contents 3. Dynamic Control of
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XXVIIIContents A. Mathematical mode
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2 1. Introduction Maybe the first i
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4 1. Introduction (Massachusetts, U
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6 1. Introduction Fig. 1.4. Coordin
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8 1. Introduction Fig. 1.5. Pig, ma
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10 1. Introduction An example of cr
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12 1. Introduction Fig. 1.8. Romeo
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2. Modelling ofUnderwater Robots
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2.2 Rigid Body’s Kinematics 17 Th
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J T k,oqJ k,oq = 1 4 I 3 , that all
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5. compute the quaternion Q by the
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2.3 Rigid Body’s Dynamics 23 Let
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2.4 Hydrodynamic Effects 25 τ 1 =
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C A ( ν )=− C T A ( ν ) ∀ ν
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2.4 Hydrodynamic Effects 29 effects
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2.5 Gravity and Buoyancy 2.5 Gravit
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2.6 Thrusters’ Dynamics 33 Fig. 2
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2.7 Underwater Vehicles’ Dynamics
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y z 2.8 Kinematics of Manipulators
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2.9 Dynamics ofUnderwater Vehicle-M
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2.9 Dynamics ofUnderwater Vehicle-M
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2.11 Identification 43 f e = K ( x
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3. Dynamic Control of 6-DOF AUVs 3.
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3.2 Earth-Fixed-Frame-Based, Model-
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o x z o b z b x b 3.3 Earth-Fixed-F
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3.4 Vehicle-Fixed-Frame-Based, Mode
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o o b y x y b x b 3.5 Model-Based C
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3.6 Mixed Earth/Vehicle-Fixed-Frame
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3.7 Jacobian-Transpose-Based Contro
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3.8 Comparison Among Controllers 59
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3.9 Numerical Comparison Among the
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force [N] moment [Nm] 20 10 0 −10
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80 4. Fault Detection/Tolerance Str
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5. Experiments of Dynamic Control o
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5.3 Experiments of Dynamic Control
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[m] [m] 5 4 3 2 1 0 0 100 200 300 4
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5.3 Experiments of Dynamic Control
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5.4 Experiments of Fault Tolerance
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[deg] 120 100 80 60 40 20 0 −20 5
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6. Kinematic Control of UVMSs “.
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6.2 Kinematic Control 107 UVMS. Thi
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6.2 Kinematic Control 109 singulari
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6.2 Kinematic Control 111 case of t
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6.5 Singularity-Robust Task Priorit
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6.6 Fuzzy Inverse Kinematics 121 It
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Simulations 6.6 Fuzzy Inverse Kinem
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6.6 Fuzzy Inverse Kinematics 125 Fi
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vehicle attitude [deg] 20 10 0 −1
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6.6 Fuzzy Inverse Kinematics 129 It
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[-] 1 0.8 0.6 0.4 0.2 0 close 0 20
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joint positions 1-3 [deg] joint pos
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e.e. position error [m] 0.02 0.01 0
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7. Dynamic Control of UVMSs 7.1 Int
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7.2 Feedforward Decoupling Control
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7.2 Feedforward Decoupling Control
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7.4 Nonlinear Control for UVMSs wit
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7.5 Non-regressor-Based Adaptive Co
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7.6 Sliding Mode Control 7.6 Slidin
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7.6 Sliding Mode Control 153 u = B
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7.6 Sliding Mode Control 155 Practi
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7.7 Adaptive Control 157 of gravity
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Let us consider the scalar function
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7.7 Adaptive Control 161 The vehicl
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[deg] 3 2.5 2 1.5 1 0.5 7.8 Output
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7.8 Output Feedback Control 165 It
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7.8 Output Feedback Control 167 whe
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7.8 Output Feedback Control 169 C T
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7.8 Output Feedback Control 171 wit
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[m] [deg] [deg] 0.1 0.05 0 −0.05
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[m] [-] [deg] x 10−3 10 8 6 4 2 0
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[Nm] [Nm] [Nm] 500 0 −500 50 0
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[m] [-] [deg] x 10−3 10 8 6 4 2 0
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[N] [N] [N] 20 0 −20 40 20 0 −2
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Page 245 and 246: 226 9. Coordinated Control of Plato
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Page 267 and 268: References 249 28. Antonelli G.and
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Page 275 and 276: References 257 168. Kato N. and Lan
Page 277 and 278: References 259 mera. In: IEEE Inter
Page 279 and 280: References 261 235. Podder T.K. and
Page 281 and 282: References 263 273. Solvang B., Den
Page 283: References 265 310. Yoerger D.R., S
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