In a number of industrial, space, or mobile applications, reaction forces and moments transmitted by a manipulator to its base are undesirable. In this paper, we analyze the problem of force and torque transmission in robotic systems, and propose design and planning methods that can eliminate it, or reduce it. Based on force and moment transmission analysis, a three DOF redundant manipulator design is selected. Dynamic reaction forces are eliminated by force balancing. Reaction moments are eliminated by following reactionless paths, whose planning is simplified by rendering the dynamics configuration-invariant. Reactionless Workspaces are defined in which any end-effector path can result in zero dynamic reactions. An example is used to demonstrate the usefulness of the proposed methods. An important advantage of these methods is that the manipulator can be used either as a redundant, or as a reduced DOF reactionless system.

1.
Abu-Abed, A., and Papadopoulos, E., 1994, “On the Design of Zero Reaction Robots,” Proc. of the CSME Forum, Montreal, Canada.
2.
Abu-Abed, A., 1993, “Analysis and Design of Planar Zero Reaction Robots,” McGill Centre for Intelligent Machines Internal Report CIM 93-24, Montreal, Canada.
3.
Berkof
R. S.
, et al.,
1977
, “
Balancing of Linkages
,”
Shock and Vibration Digest.
, Vol.
9
, No.
6
, pp.
3
10
.
4.
Dubowsky, S., and Torres, M. A., 1991, “Path Planning for Space Manipulators to Minimize Spacecraft Attitude Disturbance,” Proc. 1991 IEEE Conf. on Robotics and Automation, Sacramento, CA.
5.
Erb
B.
,
1990
, “
Canada’s Mobile Servicing System
,”
Space Technology
, Vol.
10
, No.
1/2
, pp.
19
25
.
6.
Karidis, J. P., et al., 1992, “The Hummingbird Minipositioner-Providing Three Axis Motion at 50 G’s With Low Reactions,” Proc. 1992 IEEE Conf. on Robotics and Automation, Nice, France.
7.
Papadopoulos, E., and Abu-Abed, A., 1994, “Design and Motion Planning for a Zero-Reaction Manipulator,” Proc. of the IEEE Int. Conf. on Robotics and Automation, San Diego, CA, pp. 1554–1559.
8.
Papadopoulos
E.
, and
Dubowsky
S.
,
1991
, “
On the Nature of Control Algorithms for Free-floating Space Manipulators
,”
IEEE Trans. on Robotics and Automation
, Vol.
7
, No.
6
, pp.
750
758
.
9.
Papadopoulos, E., 1992, “Path Planning for Space Manipulators Exhibiting Nonholonomic Behavior,” Proc. of the Int. Conf. on Intelligent Robots and Systems (IROS ’92), Raleigh, NC, pp. 669–675.
10.
Quinn, R. D., et al., 1988, “Redundant Manipulators for Momentum Compensation in a Micro-Gravity Environment,” AIAA Guidance, Navigation, and Control Conf., Minneapolis, MN, August 15–17.
11.
Rohn, D., et al, 1988, “Microgravity Robotics Technology Program,” ISA/88 Int. Conf., Houston, TX.
12.
Walker
M. J.
, and
Oldham
K.
,
1978
, “
General Theory of Force Balancing Using Counterweights
,”
Mechanism and Machine Theory
,
13
, pp.
175
185
.
13.
West, H., et al., 1990, “Experimental Simulation of Manipulator Base Compliance,” Experimental Robotics I, V. Hay ward, and O. Khatib, eds., Lect. Notes in Control and Information Sciences #139, Springer Verlag.
14.
Youcef-Toumi, K., and Yahiaoui, M., 1988, “The Design of a Mini Direct-Drive Finger With Decoupled Dynamics,” ASMS 1988 Winter Annual Meeting, pp. 411–415.
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