Anthropomorphic master/slave manipulator system

• US 4,046,262 A
• Filed: 01/24/1974
• Issued: 09/06/1977
• Est. Priority Date: 01/24/1974
• Status: Expired due to Term

• Current Assignee: United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
• Original Assignee: United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
• Inventors: Vallotton, Wilbur C., Vykukal, Hubert C., King, Reginald F.
• Primary Examiner(s): Makay, Albert J.
• Assistant Examiner(s): Abraham, George F.
• Application Number:
  US05/436,313
• Time in Patent Office: 1,321 Days
• Field of Search: 214/1 CM, 214/1 BC, 2/2.1 A
• US Class Current: 414/5
• CPC Class Codes: B25J 17/025 mounted in series
• CPC Class Codes: B25J 19/0029 arranged within the different robot elements
• CPC Class Codes: B25J 3/04 involving servo mechanisms servo-actuated heads B25J15/02
• CPC Class Codes: B25J 9/0006 Exoskeletons, i.e. resembling a human figure
• CPC Class Codes: B25J 9/06 characterised by multi-articulated arms
• CPC Class Codes: B25J 9/1025 Harmonic drives in general: F16H49/001

Abstract

An anthropomorphic master/slave manipulator system including master arm apparatus including a plurality of master tubular articulated portions which are coaxially adjacent one another and relatively rotatable, master transducing apparatus responsive to the relative rotation of the adjacent tubular portions and operative to provide a driving signal, slave arm apparatus including a plurality of slave tubular portions corresponding to those portions of the master arm apparatus, the slave tubular portions being coaxially adjacent one another and relatively rotatable, slave transducing apparatus responsive to the driving signal and operative to drivingly rotate the slave tubular portions through an angle that corresponds to the relative rotation of the corresponding master arm tubular portions, and a communication link between the master transducing apparatus and the slave transducing apparatus for applying the driving signal to the slave transducer.

Claims

1. A master/slave manipulator system, comprising:

master arm means including first and second master tubular portions, each master tubular portion defining an axis centrally therethrough, said first and said second master portions each having a first end lying in a plane substantially perpendicular to the axis of the respective portions and a second end lying in a plane transverse to the plane defined by said first end, said second ends being adjacent one another such that when said first ends are parallel to one another the respective axes are colinear, said first and said second master portions being relatively rotatable at said adjacent second ends;

master transducing means responsive to the relative rotation between said first and said second tubular portions and operative to provide a driving signal;

slave arm means comprising first and second slave tubular portions, each slave tubular portion defining an axis centrally therethrough, said first and said second slave portions each having a first end lying in a plane substantially perpendicular to the axis of the respective portion and a second end lying in a plane transverse to the plane defined by said first end, said second ends being adjacent one another such that when said first ends are parallel to one another the respective axes are colinear, said first and said second slave portions being relatively rotatable at said adjacent second ends;

slave transducing means responsive to said driving signal and operative to drivingly rotate said first slave tubular portion relative to said second slave tubular portion through an angle that corresponds to the relative rotation between said first and said second master tubular portions; and

communication means linking said master transducing means and said slave transducing means for applying said driving signal to said slave transducing means;

whereby rotation between said first and said second master tubular portions of said master arm means causes a corresponding rotation between said first and said second slave tubular portions of said slave arm means.

2. The master/slave manipulator system as recited in claim 1 wherein said first and said second ends of said first and said second master tubular portions are circularly shaped and said adjacent second ends are coaxial, and wherein said first and second ends of said first and second slave tubular portions are circularly shaped and said adjacent second ends are coaxial.

3. The master/slave manipulator system as recited in claim 2 wherein said master arm means further comprises a third master tubular portion having a first end that is adjacent to and relatively rotatable with respect to said first end of said second master portion;

and

wherein said slave arm means comprises a third slave tubular portion having a first end that is adjacent to and relatively rotatable with respect to said first end of said second slave portion, said three adjacent portions of said master arm means representing a joint of a limb of a human being, the relative rotation between the three portions simulating the motion of the joint, so as to allow said master arm means to affect movement simulating that of the human limb;

said master transducing means responsive to the relative rotation between each of said adjacent master tubular portions and operative to provide a plurality of driving signals, each of said driving signals representative of the rotation between one set of adjacent master tubular portions;

said slave transducing means responsive to each of said plurality of driving signals and operative to drivingly rotate the corresponding set of adjacent slave tubular portions through the same angle as that making said master transducing means respond;

whereby said slave arm means provides a movement simulating the movement of said master arm means.

4. The master/slave manipulator system as recited in claim 3 wherein said master arm means further comprises a fourth master tubular portion having a first end adjacent to said first end of said first master tubular portion, said fourth master tubular portion being coaxial with and relatively rotatable with respect to said first end of said first master tubular portion, and wherein said slave arm means further comprises a fourth slave tubular portion having a first end adjacent to said first end of said first slave tubular portion, said fourth slave tubular portion being relatively rotatable with respect to said first end of said first slave tubular portion;

said four adjacent portions of said master arm means representing two joints of a limb of a human being, the relative rotation between the four portions simulating the motion of the two joints, so as to allow said master arm means to affect movement simulating that of the human limb, said slave arm means providing a movement simulating the movement of said master arm means.

5. The master/slave manipulator system as recited in claim 3 wherein each of said plurality of driving signals generated by said master transducing means is independent of one another.

6. The master/slave manipulator system as recited in claim 3 wherein said master arm means comprises a plurality of adjacent master tubular portions to represent the shoulder and the elbow and the wrist joints of the arm of a human being, and wherein said slave arm means comprises a plurality of adjacent slave tubular portions corresponding to those portions of said master arm means, thereby to simulate movement of said master arm means.

7. The master/slave manipulator system as recited in claim 3 wherein said three adjacent portions of said master arm means are disposed to receive a joint of a human leg and move in response to motion of said joint.

8. The master/slave manipulator system as recited in claim 1 wherein the outermost portion of said master arm means comprises trigger means responsive to pressure thereon and operative to provide a hand-moving signal, and wherein the outermost portion of said slave arm means comprises movable hand means responsive to said hand-moving signal and operative to open and close said hand means in a lever-like manner such that the position of said hand means follows the pressure exerted on said trigger means.

9. The master/slave manipulator system as recited in claim 8 wherein said trigger means comprises a graspable handle portion and a trigger portion, said trigger portion responsive to pressure thereon and operative to provide said hand-moving signal.

10. The master/slave manipulator system as recited in claim 1 wherein said master transducing means comprises a rotary position transducer.

11. The master/slave manipulator system as recited in claim 10 wherein said rotary position transducer is a rotary potentiometer having a first portion associated with a reference location on said second end of said first master tubular portion and having a second portion movably associated with said second end of said second tubular portion, said potentiometer portions being responsive to relative rotation between said first and said second master tubular portions and operative to provide a driving signal representative of said relative rotation.

12. The master/slave manipulator system as recited in claim 1 wherein said slave transducing means comprises a motor responsive to said driving signal and operative to drivingly rotate said second slave tubular portion relative to said slave first tubular portion.

13. The master/slave manipulator system as recited in claim 12 wherein said slave transducing means comprises means for amplifying said driving signal, lag compensation network means for adjusting the phase of said amplified signals, and power amplifying means for amplifying said phase adjusted signal and for applying said amplified phase adjusted signal to said motor.

14. The master/slave manipulator system as recited in claim 13 and further comprising feedback means responsive to the relative rotation between said first and said second slave tubular portions and operative to provide an error signal;

and

comparator means responsive to said error signal and said driving signal and operative to provide an error corrected driving signal to said amplifying means.

15. The master/slave manipulator system as recited in claim 12 wherein said motor includes a rotatable shaft and further comprising gear reducing means responsive to the rotation of said motor shaft and operative to drivingly rotate said first and said second slave tubular portion at a rate different from the rate at which said motor rotates.

16. The master/slave manipulator system as recited in claim 15 wherein said gear reducing means is operative to reduce the rate of rotation of the motor shaft by a ratio of 160:

1.

17. The master/slave manipulator system as recited in claim 15 wherein said gear reducing means comprises a rotatable wave generator portion associated with said motor shaft, a driveable rigid outer circular portion coupled to said second end of said second slave tubular member and driven by said wave generator, and a flexible flexspline portion coupled to said wave generator portion and in engagement with said rigid circular portion and operative to relatively rotate said second end of said first slave tubular portion, whereby rotation of said motor shaft rotates said wave generator, whereby to cause relative rotation between said adjacent second ends of said first and said second slave tubular portions.

18. The master/slave manipulator system as recited in claim 12 wherein said motor is a hydraulic motor.

19. The master/slave manipulator system as recited in claim 1 wherein said communication means comprises conducting means for interconnecting said master arm means and said slave arm means.

20. The master/slave manipulator system as recited in claim 19 wherein said communication means further comprises power supplies for providing energy to said master transducing means and said slave transducing means.

21. The master/slave manipulator system as recited in claim 1 wherein said communication means comprises a transmitter disposed proximate said master arm means responsive to said transmitted driving signal and operative to apply said driving signal to said slave transducing means.

22. The master/slave manipulator system as recited in claim 1 and further comprising limiting means responsive to the relative rotation between said first and said second slave tubular portions and operative to limit movement to a preselected angle.

23. A master/slave manipulator system comprising:

master arm means including a first tubular portion and a second tubular portion adjacent said first tubular portion, a first circular bearing comprising a plurality of balls engaged between an outer circular race and an inner circular race, first and second rings, said outer and said inner races being connected to said adjacent first and second portions, respectively, by said first and second rings, respectively, whereby said adjacent portions are relatively rotatable;

master transducing means responsive to the relative rotation between said adjacent portions and operative to provide a driving signal;

slave arm means comprising a third tubular portion and a fourth tubular portion adjacent said third tubular portion, a second circular bearing comprising a plurality of balls engaged between a second outer circular race and a second inner circular race, third and fourth rings, said second outer and inner races being connected to said adjacent slave tubular portions, respectively, by said third and fourth rings, respectively;

slave transducing means responsive to said driving signal and operative to drivingly rotate said third ring relative to said fourth ring; and

communication means linking said master transducing means and said slave transducing means for applying said driving signal to said slave transducing means;

whereby relative rotation between said first and said second adjacent tubular portions of said master arm means causes a corresponding rotation between said third and said fourth adjacent tubular portions of said slave arm means.

24. A master/slave manipulator system comprising:

master suit means comprising an upper body covering portion, master arm means connected to said upper body portion, and master leg means connected to said upper body covering portion;

said master arm means including at least a first and a second master tubular portion, and said master leg means including at least a third and a fourth master tubular portion, said master tubular portions being adjacent one another;

a plurality of master bearing members, one of said bearing members interconnecting adjacent master tubular portions of said master suit and being relatively rotatable, whereby said adjacent master portions are relatively rotatable;

master transducing means responsive to the relative rotation of each of said master bearing members and operative to provide a plurality of driving signals each said driving signal representative of the relative rotation between one set of adjacent master tubular portions;

slave suit means comprising slave arm means and slave leg means, said slave arm means including a first and a second slave tubular portion, and said slave leg means including at least a third and a fourth slave tubular portion, said slave tubular portions being adjacent one another;

a plurality of slave bearing members, one of said slave bearing members interconnecting adjacent slave tubular portions and being relatively rotatable, whereby said adjacent slave tubular portions are relatively rotatable;

a plurality of slave transducing means, each said slave transducing means responsive to the corresponding driving signal and operative to relatively rotate the corresponding slave bearing member; and

communication means linking said master transducing means and said plurality of slave transducing means for applying said plurality of driving signals to the corresponding one of said plurality of said slave transducing means, whereby rotation between said adjacent master portions of said master suit causes a corresponding rotation between said adjacent slave portions of said slave suit means.

25. The master/slave manipulator system as recited in claim 24 and further comprising master carriage means for moving said master suit means, means responsive to the movement of said master carriage means and operative to provide a carriage movement signal, slave carriage means for moving said slave suit means, slave carriage moving means responsive to said carriage movement signal and operative to move said slave carriage means to correspond to the movement of said master carriage communication means for applying said carriage movement signal to said slave carriage moving means.

26. A master/slave manipulator system comprising:

means for generating a plurality of signals each of which corresponds to the relative motion between different adjacent zones of a human limb;

slave means comprising a plurality of tubular portions each having a longitudinal axis, a first circular-shaped end occupying a plane that is perpendicular to its respective longitudinal axis, and a second circular-shaped end occupying a plane that is oblique to its respective longitudinal axis;

means for rotatably connecting said tubular portions in serial fashion, each portion being alternatively oriented wherein the first end of a tubular portion is connected to the first end of an adjacent tubular portion and the second end of a tubular portion is connected to the second end of an adjacent tubular portion;

transducing means responsive to said driving signals and operative to drivingly rotate said tubular portions and simulate the movement of a human limb;

means for applying said driving signals to said tansducing means;

said slave means simulating the movement of a limb of an operator; and

said generating means including a series of rotatably interconnected tubular portions that are adapted to be worn over said limb of the operator.