A novel two-degree-of-freedom (DOF) cable-loop slider-driven parallel mechanism is introduced in this paper. The novelty of the mechanism lies in the fact that no passive rigid-link mechanism or springs are needed to support the end-effector (only cables are connected to the end-effector) while at the same time there is no actuation redundancy in the mechanism. Sliders located on the edges of the workspace are used and actuation redundancy is eliminated while providing force closure everywhere in the workspace. It is shown that the two degrees of freedom of the mechanism are decoupled and only two actuators are needed to control the motion. There are two cable loops for each direction of motion: one acts as the actuating loop while the other is the constraint loop. Due to the simple geometric design, the kinematic and static equations of the mechanism are very compact. The stiffness of the mechanism is also analyzed in the paper. It can be observed that the mechanism's stiffness is much higher than the stiffness of the cables. The proposed mechanism's workspace is essentially equal to its footprint and there are no singularities.

References

References
1.
Albus
,
J.
,
Bostelman
,
R.
, and
Dagalakis
,
N.
,
1993
, “
The NIST Robocrane
,”
J. Rob. Syst.
,
10
(
5
), pp.
709
724
.10.1002/rob.4620100509
2.
Voss
,
K. H. J.
,
van der Wijk
,
V.
, and
Herder
,
J. L.
,
2013
, “
A Cable-Driven Parallel Mechanism for the Interaction With Hemispherical Surfaces
,”
Mech. Mach. Sci.
,
7
, pp.
409
417
.10.1007/978-94-007-4902-3
3.
Izard
,
J.-B.
,
Gouttefarde
,
M.
,
Baradat
,
C.
,
Culla
,
D.
, and
Sallé
,
D.
,
2013
, “
Integration of a Parallel Cable-Driven Robot on an Existing Building Façade
,”
Cable-Driven Parallel Robots, Mechanisms and Machine Science
, Vol.
12
,
T.
Bruckmann
and
A.
Pott
, eds.,
Springer
,
New York
, pp.
149
164
.
4.
Kawamura
,
S.
,
Kino
,
H.
, and
Won
,
C.
,
2000
, “
High-Speed Manipulation by Using Parallel Wire-Driven Robots
,”
Robotica
,
18
, pp.
13
21
.10.1017/S0263574799002477
5.
Azizian
,
K.
,
Cardou
,
P.
, and
Moore
,
B.
,
2012
, “
Classifying the Boundaries of the Wrench-Closure Workspace of Planar Parallel Cable-Driven Mechanisms by Visual Inspection
,”
ASME J. Mech. Rob.
,
4
(
2
), p.
024503
.10.1115/1.4006520
6.
Mustafa
,
S. K.
, and
Agrawal
,
S. K.
,
2012
, “
On the Force-Closure Analysis of n-DOF Cable-Driven Open Chains Based on Reciprocal Screw Theory
,”
IEEE Trans. Rob.
,
28
(
1
), pp.
22
31
.10.1109/TRO.2011.2168170
7.
Alexandre dit Sandretto
,
J.
,
Daney
,
D.
, and
Gouttefarde
,
M.
,
2013
, “
Calibration of a Fully-Constrained Parallel Cable-Driven Robot
,”
Proceedings of ROMANSY
,
Udine, Italy
.
8.
Arai
,
M.
, and
Hirose
,
S.
,
2007
, “
Improved Reel Mechanism to Wind a Cable Uniformly in Spherical Trailer
,”
Proceedings of the IEEE International Workshop on Safety, Security and Rescue Robotics
, Sept.,
Rome, Italy
, 978-1-4244-1569-4.
9.
Merlet
,
J. P.
,
2008
, “
Kinematics of the Wire-Driven Parallel Robot MARIONET Using Linear Actuators
,”
Proceedings of the IEEE International Conference on Robotics and Automation
,
Pasadena, CA
, pp.
3857
3862
.
10.
Behzadipour
,
S.
,
2009
, “
Kinematics and Dynamics of a Self-Stressed Cartesian Cable-Driven Mechanism
,”
ASME J. Mech. Des.
,
131
(
6
), p.
061005
.10.1115/1.3125206
11.
Laliberté
,
T.
,
Gosselin
,
C.
, and
Gao
,
D.
,
2010
, “
Closed-Loop Transmission Routings for Cartesian Scara-Type Manipulators
,”
Proceedings of the ASME IDETC/CIE
,
Montreal, Québec, Canada
.
12.
Liu
,
H.
,
Gosselin
,
C.
, and
Laliberté
,
T.
,
2010
, “
A Planar Spring-Loaded Cable-Loop-Driven Parallel Mechanism
,”
Proceedings of the ASME IDETC/CIE
,
Montreal, Québec, Canada
, DETC2010-28424.
13.
Liu
,
H.
,
Gosselin
,
C.
, and
Laliberté
,
T.
,
2011
, “
A Spatial Spring-Loaded Cable-Loop-Driven Parallel Mechanism
,”
Proceedings of the ASME IDETC/CIE Conference
,
Washington, DC
, DETC2011-48261.
14.
Rodnunsky
,
J. J.
,
2009
, “
Safety System and Method for Objects Moved by a Driving Cabling System
,” U.S. Patent No. US 2009/0301814 A1.
15.
Hong
,
D. W.
, and
Cipra
,
R. J.
,
2003
, “
A Method for Representing the Configuration and Analyzing the Motion of Complex Cable-Pulley Systems
,”
ASME J. Mech. Des.
,
125
(
2
), pp.
332
341
.10.1115/1.1564062
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