We would like to give robots the ability to secure human safety in human-robot collisions capable of arising in our living and working environments. However, unfortunately, not much attention has been paid to the technologies of human robot symbiosis to date because almost all robots have been designed and constructed on the assumption that the robots are physically separated from humans. A robot with a new concept will be required to deal with human-robot contact. In this article, we propose a passively movable human-friendly robot that consists of an elastic material-covered manipulator, passive compliant trunk, and passively movable base. The compliant trunk is equipped with springs and dampers, and the passively movable base is constrained by friction developed between the contact surface of the base and the ground. During unexpected collisions, the trunk and base passively move in response to the produced collision force. We describe the validity of the movable base and compliant trunk for collision force suppression, and it is demonstrated in several collision situations.
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References
1.
Akella, P. N., Parra-Vega, V., Arimoto, S., and Tanie, K. 1994 (May, San Diego, CA). Discontinuous model-based adaptive control for robots executing free and constrained tasks . Proc. IEEE Int. Conf. Robotics and Automation, pp. 3000–3007 .
2.
Alexander, J. C., and Maddocks, J. H. 1993. Bounds on the friction-dominated motion of a pushed object . Int. J. Robotics Research12(3): 231–248 .
3.
Alexander, R. McN. 1990. Three uses for springs in legged locomotion . Int. J. Robotics Research9(2): 53–61 .
4.
Anderson, R. J., and Spong, M. W. 1987 (March, Raleigh, NC). Hybrid impedance control of robotic manipulators . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1073–1080 .
5.
Asada, H. 1983. A geometrical representation of manipulator dynamics and its application to arm design . ASME J. Dynamics Systems, Measurement, and Control105: 131–135 .
6.
Cannon, R. H., and Schmitz, E. 1984. Initial experiments on the end-point control of a flexible one-link robot . Int. J. Robotics Research3(3): 62–73 .
7.
Cheung E., and Lumelsky, V. 1988 (April, Philadelphia, PA). Motion planning for robot arm manipulators with proximity sensing . Proc. IEEE Int. Conf. Robotics and Automation, pp. 740–745 .
8.
Chiacchio, P., Chiaverini, S., and Siciliano, B. 1991. Global task space manipulability ellipsoids for multiple-arm systems . IEEE Trans. Robotics and Automation7(5): 678–685 .
9.
Cutkosky, M. R., and Wright, P. 1986a. Active control of a compliant wrist in manipulating task . ASME J. Engineering for Industry108: 36–43 .
10.
Cutkosky, M. R., and Wright, P. 1986b. Friction, stability and the design of robotic fingers . Int. J. Robotics Research5(4): 20–37 .
11.
Dhillon, B. S., and Anude, O. C. 1993. Robot safety and reliability: A review . Microelectron. Reliab. 33(3): 413–429 .
12.
Dubowsky, S., and Papadopoulos, E. 1993. The kinematics, dynamics, andcontroloffree-flyingandfree-floatingspace robotic systems . IEEE Trans. Robotics and Automation9(5): 531–543 .
13.
Dupont, P. E. 1992 (May, Nice, France). The effect of coulomb friction on the existence and uniqueness of the forward dynamics problem . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1442–1447 .
14.
Elfes, A. 1989. Occupancy grids: A probabilistic framework for robot perception and navigation. Ph.D. thesis, Electrical and Computer Engineering Department/Robotics Institute, Carnegie-Mellon University.
15.
Engelberger, J. F. 1980. Robotics in Services—Management and Applications of Industrial Robots. London: Kogan Page .
16.
Fugie, M. G., Tani, T., and Hirano, K. 1994 (September, Munich, Germany). Walking rehabilitation system for the elderly . Proc. IEEE/RSJ Int. Conf. Intelligent Robots and Systems, pp. 1655–1662 .
17.
Goldenberg, A. A. 1987. Force and impedance control of robot manipulators . IEEE Trans. Robotics and Automation4(6): 653–660 .
18.
Goswami, A., and Peshkin, M. A. 1993 (May, Atlanta, GA). Task-space/joint-space damping transformations for passive redundant manipulators . Proc. IEEE Int. Conf. Robotics and Automation, pp. 642–647 .
19.
Graham, J. H., and Millard, D. L. 1991. Toward development of inherently safe robots. Int. Symp. Industrial Robots, pp. 911–917.
20.
Hills, W. D. 1982. A high-resolution imaging touch sensor . Int. J. Robotics Research1(2): 33–44 .
21.
Hogan, N. 1985. Impedance control: An approach to manipulation, part I-theory . ASME J. Dynamics Systems, Measurement, and Control107(1): 1–7 .
22.
Hogan, N. 1987 (March, Raleigh, NC). Stable execution of contact tasks using impedance control . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1047–1054 .
23.
Hollerbach, J. M. 1980. A recursive Lagrangian formulation of manipulator dynamics and a comparative study of dynamics formulation complexity . IEEE Trans. Systems, Man, and Cybernetics10(11): 730–736 .
24.
Howe, R. D., and Cutkosky. 1993. Dynamic tactile sensing: Perception of fine surface features with stress rate sensing . IEEE Trans. Robotics and Automation9(2): 140–151 .
25.
Hyde, J., and Cutkosky, M. R. 1994. Controlling contact transition . IEEE Control Systems14(1): 25–30 .
26.
Kahng, J., and Amirouche, F.M.L. 1987 (March, Raleigh, NC). Impact force analysis in mechanical hand design . Proc. IEEE Int. Conf. Robotics and Automation, pp. 2061–2067 .
27.
Kawamura, K., and Iskarous, M. 1994 (May, Munich, Germany). Trends in service robots for the disabled and the elderly . Proc. IEEE/RSJ Int. Conf. Intelligent Robots and Systems, pp. 1647–1653 .
28.
Kazerooni, H., Sheridan, T., and Houpt, P. 1986. Robust compliant motion for manipulators, part I: The fundamental concepts of compliant motion . IEEE Trans. Robotics and Automation2(2): 83–92 .
29.
Kazerooni, K. H., and Waibel, B. J. 1988 (April, Philadelphia, PA). Theory and experiment on the stability of robot compliance control . Proc. IEEE Int. Conf. Robotics and Automation, pp. 71–87 .
30.
Khatib, O. 1987. A unified approach for motion and force control of robot manipulator: The operational space formulation . IEEE Trans. Robotics and AutomationRA-3(1): 43–53 .
31.
Khatib, O., and Burdick, J. 1986 (April, San Francisco, CA). Motion and force control of robot manipulators . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1381–1386 .
32.
Kitagaki, K., and Uchiyama, M. 1992 (May, Nice, France). Optimal approach velocity of end-effector to the environment . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1928–1934 .
33.
Landsberger, S. 1984. Design and construction of a cable-controlled, parallel link manipulator. MS thesis, Mechanical Engineering, MIT.
34.
Laurin-Kovitz, K. F., Colgate, J. E., and Carnes, S.D.R. 1991 (April, Sacramento, CA). Design of components for programmable passive impedance . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1476–1481 .
35.
Lim, H. O., and Tanie, K. 1999. Collision-tolerant control of human-friendly robot with viscoelastic trunk . IEEE/ASME Trans. Mechatronics4: 417–427 .
36.
Lindsay, T. S., Sinha, P. R., and Paul, R. P. 1993 (May, Atlanta, GA). An instrumented compliant wrist for robotics applications . Proc. IEEE Int. Conf. Robotics and Automation, pp. 648–653 .
37.
Lozano-Pérez, T. 1985. Motion planning for simple robot manipulators . Int. J. Robotics Research3: 133–140 .
38.
Luh, J. Y. S., Walker, M. W., and Paul, R.P.C. 1980. Online computational scheme for mechanical manipulators . ASME J. Dynamics Systems, Measurement, and Control102: 69–76 .
39.
Lumelsky, V. J., and Cheung, E. 1993. Real-time collision avoidance in teleoperated whole-sensitive robot arm manipulators . IEEE Trans. Systems, Man, and Cybernetics23(1): 194–203 .
40.
Lumelsky, V. J., and Stepanov, A. A. 1987. Path planning strategies for a point mobile automaton moving amidst unknown obstacles of arbitrary shape. Algorithmica.
41.
MacMillan, W. D. 1936. Dynamics of Rigid Bodies. New York: Dover .
42.
Mason, M. T. 1986. Mechanics and planning of manipulator pushing operations . Int. J. Robotics Research5(3): 53–71 .
43.
Matthies, L., and Elfes, A. 1988 (April, Philadelphia, PA). Integration sonar and stereo range data using a grid-based representation . Proc. IEEE Int. Conf. Robotics and Automation, pp. 25–29 .
44.
Mavroidas, C., Rowe, P., and Dubowsky, S. 1995 (August, Pittsburgh, PA). Inferred end-point control of long reach manipulators . Proc. IEEE/RSJ Int. Conf. Intelligent Robots and Systems, pp. 71–76 .
45.
McGeer, T. 1990. Passive bipedal walking . Int. J. Robotics Research9(2).
46.
Mills, J. K. 1990a. Stability of robotic manipulators during transition to and from compliant motion . Automatica26(5): 861–874 .
47.
Mills, J. K. 1990b (May, Cincinnati, OH). Hybrid actuator for robot manipulator: Design, control, and performance . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1872–1877 .
48.
Mills, J. K., and Nguyen, C. V. 1992. Robotic manipulator collisions: Modeling and simulation . ASME J. Dynamics Systems, Measurement, and Control114: 650–659 .
49.
Morita, T., and Sugano, S. 1995 (May, Nagoya, Japan). Design and development of a new robot joint using a mechanical impedance adjuster . Proc. IEEE Int. Conf. Robotics and Automation, pp. 2469–2475 .
50.
Morita, T., Shibuya, K., and Sugano, S. 1998 (May, Leuven, Belgium). Design and control of mobile manipulation system for human symbiotic humanoid: Hadaly-2 . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1315–1320 .
51.
Morita, T., and Sugano, S. 1996 (April, Minneapolis, MN). Development of 4-d.o.f. manipulator using mechanical impedance adjuster . Proc. IEEE Int. Conf. Robotics and Automation, pp. 2902–2907 .
52.
Murray, R. M., Li, Z., and Sastry, S. S. 1994. A Mathematical Introduction to Robotic Manipulation. Boca Raton, FL: CRC .
53.
Nenchev, N., Yoshida, K., and Uchiyama, M. 1996 (December, Kobe, Japan). Reaction null space based control of flexible structure mounted manipulator systems . Proc. IEEE Int. Conf. Decision and Control, pp. 4118–4123 .
54.
Novak, J. L., and Feddema, J. T. 1992 (May, Nice, France). A capacitance-based proximity sensor for whole arm obstacle avoidance . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1307–1314 .
55.
Parker, J. K., and Paul, F. W. 1987. Controlling impact forces pneumatic robot hand designs . ASME J. Dynamics Systems, Measurement, and Control109: 323–334 .
56.
Raibert, M. H. 1986. Legged Robots That Balance. Cambridge, MA: MIT Press .
57.
Raibert, M. H., and Craig, J. J. 1981. Hybrid position/force control of manipulator . ASME J. Dynamics Systems, Measurement, and Control102(2): 126–133 .
58.
Salisbury, J. K. 1980 (December, Albuquerque, NM). Active stiffness control of a manipulator in Cartesian coordinates . Proc. IEEE Int. Conf. Decision and Control, pp. 91–97 .
59.
Schutter, J. D., and Van Brussel, H. 1988. Compliant robot motion I: A formalism for specifying compliant motion tasks .Int. J. Robotics Research7(4): 3–17 .
60.
Shoji, Y., Inaba, M., and Fukuda, T. 1991. Impact control of grasping . IEEE Trans. Industrial Electronics38(3): 187–194 .
61.
Silver, W. M. 1982. On the equivalence of Lagrangian and Newton-Euler dynamics for manipulators . Int. J. Robotics Research1(2): 118–128 .
62.
Stewart, S. 1965. A platform with six degrees of freedom . in Proc. Inst. of Mechanical Engineering180(5): 371–386 .
63.
Stoughton, R. S., and Arai, T. 1993. A modified Stewart platform manipulator with improved dexterity . IEEE Trans. Robotics and Automation9(2): 166–173 .
64.
Sturges, R. H. 1988. A three-dimensional assembly task quantification with application to machine dexterity . Int. J. Robotics Research7(4): 34–78 .
65.
Suita, K., Yamada, Y., Tsuchida, N., Imai, K., Ikeda, H., and Sugimoto, N. 1995 (May, Nagoya, Japan). A failure-to-safety “kyozon” system with simple contact with detection and stop capabilities for safe human-autonomous robot coexistence . Proc. IEEE Int. Conf. Robotics and Automation, pp. 3089–3096 .
66.
Suzuki, T., Yamada, K., and Okura, S. 1992 (May, Nice, France). A fine contact motion of manipulators based on learning control . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1461–1466 .
67.
Taghirad, H. D. 1993. Analysis, design, and control of hopping robot. M. Eng. Project Report, Department of Mechanical Engineering, McGill University, Montreal, Quebec, Canada .
68.
Volpe, R., and Khosla, P. 1991 (April, Sacramento, CA). Experimental verification of a strategy for impact control . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1854–1860 .
69.
Vranish, J. M., and Chauhan, D. S. 1990 (July, British Columbia, Canada). Tri-mode collision avoidance skin for robot arms in space . Proc. Int. Symp. Robotics and Manufacturing: Research, Education, and Applications, pp. 189–195 .
70.
Walker, I. D. 1990 (May, Cincinnati, OH). The use of kinematic redundancy in reducing impact and contact effects in manipulation . Proc. IEEE Int. Conf. Robotics and Automation, pp. 434–446 .
71.
Wang, W. T., Kumar, K., and Abel, J. 1992 (May, Nice, France). Dynamics of rigid bodies undergoing multiple frictional contacts . Proc. IEEE Int. Conf. Robotics and Automation, pp. 2764–2769 .
72.
Wedel, D. L., and Saridis, G. N. 1988 (April, Philadelphia, PA). An experiment in hybrid position/force control of a six dof revolute manipulator . Proc. IEEE Int. Conf. Robotics and Automation, pp. 1638–1642 .
73.
Whitney, D. E. 1977. Force feedback control of manipulator fine motions . ASME J. Dynamics Systems, Measurement, and Control, pp. 91–97 .
74.
Whitney, D. E. 1982. Quasi-static assembly of compliantly supported parts . ASME J. Dynamics Systems, Measurement, and Control104(1): 65–77 .
75.
Yamada, Y. 1997. Evaluation of human pain tolerance and its application to designing safety robot mechanisms for human-robot coexistence . J. Robotics and Mechatronics9(1): 65–70 .
76.
Yokoi, K. 1994. Direct compliance control of robot arm. Ph.D. thesis, Department of Mechanical Engineering Science, Tokyo Institute of Technology.
77.
Yokoi, K., Arisumi, H., and Komoriya, K. 1996 (November, Niigata, Japan). A gentle motion of a robot manipulator . RSJ Annual Conf. Robotics Society of Japan, pp. 1155–1156 .
78.
Yoshikawa, T. 1985. Manipulability of robotic mechanisms . Int. J. Robotics Research4(2): 3–9 .
79.
Youcef-Toumi, K., and Gutz, D. A. 1989 (May, Scottsdale, AZ). Impact and force control . Proc. IEEE Int. Conf. Robotics and Automation, pp. 410–416 .
80.
Zheng, Y. F., and Hemami, H. 1985. Mathematical modeling of a robot collision with its environment . J. Robotic Systems2(3): 289–307 .
