A twisting problem is identified from the central located flexible backbone continuum robot. Regarding this problem, a design solution is required to mechanically minimize this twisting angle along the backbone. Further, the error caused by the kinematic assumption of previous works is identified as well, which requires a kinematic solution to minimize. The scope of this paper is to introduce, describe and teste a novel design of continuum robot which has a twin-pivot compliant joint construction that minimizes the twisting around its axis. A kinematics model is introduced which can be applied to a wide range of twin-pivot construction with two pairs of cables per section design. And according to this model, the approach for minimising the kinematic error is developed. Furthermore, based on the geometry and material property of compliant joint, the work volumes for single/three-section continuum robot are presented, respectively. The kinematic analysis has been verified by a three-section prototype of continuum robot and adequate accuracy and repeatability tests carried out. And in the test, the system generates relatively small twisting angles when a range of end loads is applied at the end of the arm. Utilising the concept presented in this paper, it is possible to develop a continuum robot which can minimize the twisting angle and be accurately controlled. In this paper, a novel design of continuum robot which has a twin-pivot compliant joint construction that minimizes the twisting around its axis is introduced, described and tested. A kinematics model is introduced which can be applied to a wide range of twin-pivot construction with two pairs of cables per section design. Furthermore, based on the geometry and material property of compliant joint, the work volumes for single/three-section continuum robot are presented, respectively. Finally, the kinematic analysis has been verified by a three-section prototype of continuum and adequate accuracy and repeatability tests carried out.

References

References
1.
Asari
, V
. K.
,
Kumar
,
S.
, and
Kassim
,
I. M.
,
2000
, “
A Fully Autonomous Microrobotic Endoscopy System
,”
J. Intell. Rob. Syst.
,
28
(
4
), pp.
325
341
.
2.
Bailly
,
Y.
,
Amirat
,
Y.
, and
Fried
,
G.
,
2011
, “
Modeling and Control of a Continuum Style Microrobot for Endovascular Surgery
,”
IEEE Trans. Rob.
,
27
(
5
), pp.
1024
1030
.
3.
Hu
,
H.
,
Wang
,
P.
,
Zhao
,
B.
,
Li
,
M.
, and
Sun
,
L.
,
2009
, “
Design of a Novel Snake-Like Robotic Colonoscope
,”
IEEE International Conference on Robotics and Biomimetics
(
ROBIO
), Guilin, China, Dec. 19–23, pp.
1957
1961
.
4.
Kim
,
Y.-J.
,
Cheng
,
S.
,
Kim
,
S.
, and
Iagnemma
,
K.
,
2014
, “
A Stiffness-Adjustable Hyperredundant Manipulator Using a Variable Neutral-Line Mechanism for Minimally Invasive Surgery
,”
IEEE Trans. Rob.
,
30
(
2
), pp.
382
395
.
5.
Simaan
,
N.
,
2005
, “
Snake-Like Units Using Flexible Backbones and Actuation Redundancy for Enhanced Miniaturization
,”
IEEE International Conference on Robotics and Automation
(
ICRA
), Barcelona, Spain, Apr. 18–22, pp.
3012
3017
.
6.
Simaan
,
N.
,
Taylor
,
R.
, and
Flint
,
P.
,
2004
, “
A Dexterous System for Laryngeal Surgery
,”
IEEE International Conference on Robotics and Automation
(
ICRA’04
), New Orleans, LA, Apr. 26–May 1, pp.
351
357
.
7.
Webster
,
R. J.
,
Romano
,
J. M.
, and
Cowan
,
N. J.
,
2009
, “
Mechanics of Precurved-Tube Continuum Robots
,”
IEEE Trans. Rob.
,
25
(
1
), pp.
67
78
.
8.
Yoon
,
H.-S.
, and
Yi
,
B.-J.
,
2009
, “
A 4-DOF Flexible Continuum Robot Using a Spring Backbone
,”
International Conference on Mechatronics and Automation
(
ICMA 2009
), Changchun, China, Aug. 9–12, pp.
1249
1254
.
9.
Chen
,
G.
,
Fu
,
L. M.
,
Pham
,
T.
, and
Redarce
,
T.
,
2013
, “
Characterization and Modeling of a Pneumatic Actuator for a Soft Continuum Robot
,”
IEEE International Conference on Mechatronics and Automation
(
ICMA
), Takamatsu, Japan, Aug. 4–7, pp.
243
248
.
10.
Gravagne
,
I. A.
, and
Walker
, I
. D.
,
2000
, “
On the Kinematics of Remotely-Actuated Continuum Robots
,”
IEEE International Conference on Robotics and Automation
(
ICRA’00
), San Francisco, CA, Apr. 24–28, pp.
2544
2550
.
11.
Shammas
,
E.
,
Wolf
,
A.
, and
Choset
,
H.
,
2006
, “
Three Degrees-of-Freedom Joint for Spatial Hyper-Redundant Robots
,”
Mech. Mach. Theory
,
41
(
2
), pp.
170
190
.
12.
Ohno
,
H.
, and
Hirose
,
S.
,
2001
, “
Design of Slim Slime Robot and Its Gait of Locomotion
,”
IEEE/RSJ International Conference on Intelligent Robots and Systems
(
IROS
), Maui, HI, Oct. 29–Nov. 3, pp.
707
715
.
13.
OC Robotics
,
2008
, “
Snake-Arm Robots Access the Inaccessible
,”
Nucl. Technol. Int.
,
1
, pp.
92
94
.
14.
OC Robotics, 2015, “Snake-Arm Robots for Aircraft Assembly,” OC Robotics, Bristol, UK, http://www.ocrobotics.com/applications–solutions/aerospace/aerospace-case-study/
15.
Chen
,
Y.
,
Liang
,
J.
, and
Hunter
, I
. W.
,
2014
, “
Modular Continuum Robotic Endoscope Design and Path Planning
,”
IEEE International Conference on Robotics and Automation
(
ICRA
), Hong Kong, May 31–June 7, pp.
5393
5400
.
16.
Walker
,
I. D.
, and
Hannan
,
M. W.
,
1999
, “
A Novel ‘Elephant's Trunk’ Robot
,”
IEEE/ASME International Conference on Advanced Intelligent Mechatronics
(
AIM
), Atlanta, GA, Sept. 19–23, pp.
410
415
.
17.
Simaan
,
N.
,
Xu
,
K.
,
Wei
,
W.
,
Kapoor
,
A.
,
Kazanzides
,
P.
,
Taylor
,
R.
, and
Flint
,
P.
,
2009
, “
Design and Integration of a Telerobotic System for Minimally Invasive Surgery of the Throat
,”
Int. J. Rob. Res.
,
28
(
9
), pp.
1134
1153
.
18.
Walker
,
I. D.
,
2013
, “
Continuous Backbone ‘Continuum’ Robot Manipulators
,”
ISRN Rob.
,
2013
, p.
726506
.
19.
Qi
,
P.
,
Qiu
,
C.
,
Liu
,
H.
,
Dai
,
J. S.
,
Seneviratne
,
L.
, and
Althoefer
,
K.
,
2014
, “
A Novel Continuum-Style Robot With Multilayer Compliant Modules
,”
IEEE/RSJ International Conference on Intelligent Robots and Systems
(
IROS 2014
), Chicago, IL, Sept.14–18, pp.
3175
3180
.
20.
Murphy
,
R. J.
,
Otake
,
Y.
,
Taylor
,
R. H.
, and
Armand
,
M.
,
2014
, “
Predicting Kinematic Configuration From String Length for a Snake-Like Manipulator not Exhibiting Constant Curvature Bending
,”
IEEE/RSJ International Conference on Intelligent Robots and Systems
(
IROS 2014
), Chicago, IL, Sept. 14–18, pp.
3515
3521
.
21.
Jones
,
B. A.
, and
Walker
,
I. D.
,
2006
, “
Practical Kinematics for Real-Time Implementation of Continuum Robots
,”
IEEE Trans. Rob.
,
22
(
6
), pp.
1087
1099
.
22.
Jones
,
B. A.
, and
Walker
, I
. D.
,
2006
, “
Kinematics for Multisection Continuum Robots
,”
IEEE Trans. Rob.
,
22
(
1
), pp.
43
55
.
23.
Xu
,
K.
, and
Simaan
,
N.
,
2010
, “
Analytic Formulation for Kinematics, Statics, and Shape Restoration of Multibackbone Continuum Robots Via Elliptic Integrals
,”
J. Mech. Rob.
,
2
(
1
), p.
011006
.
24.
Webster
,
R. J.
, and
Jones
,
B. A.
,
2010
, “
Design and Kinematic Modeling of Constant Curvature Continuum Robots: A Review
,”
Int. J. Rob. Res.
,
29
(
13
), pp.
1661
1683
.
25.
McMahan
,
W.
,
Jones
,
B. A.
, and
Walker
, I
. D.
,
2005
, “
Design and Implementation of a Multi-Section Continuum Robot: Air-Octor
,”
IEEE/RSJ International Conference on Intelligent Robots and Systems
(
IROS 2005
), Edmonton, Canada, Aug. 2–6, pp.
2578
2585
.
26.
Hannan
,
M.
, and
Walker
,
I.
,
2001
, “
The ‘Elephant Trunk’ Manipulator, Design and Implementation
,”
IEEE/ASME International Conference on Advanced Intelligent Mechatronics
(
AIM
), Como, Italy, July 8–12, pp.
14
19
.
27.
Dong
,
X.
,
Raffles
,
M.
,
Guzman
,
S. C.
,
Axinte
,
D.
, and
Kell
,
J.
,
2014
, “
Design and Analysis of a Family of Snake Arm Robots Connected by Compliant Joints
,”
Mech. Mach. Theory
,
77
, pp.
73
91
.
28.
McKelvey
,
A.
, and
Ritchie
,
R.
,
1999
, “
Fatigue-Crack Propagation in Nitinol, a Shape-Memory and Superelastic Endovascular Stent Material
,”
J. Biomed. Mater. Res.
,
47
(
3
), pp.
301
308
.
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