Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent
1996-02-23
1999-07-13
Sircus, Brian
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
31856811, 318628, 395 95, 7449003, 7449007, 7449011, G05B 1101
Patent
active
059231394
ABSTRACT:
A passive constraint device for implementing a programmable virtual constraint surface, comprises one or more non-holonomic kinematic transmission element for coupling velocities of motion and having a steering angle. A user moves the handle of the passive constraint device relative to the virtual surface. A steering motor sets the steering angle of the non-holonomic element in response to the proximity of the handle to the virtual surface. When in contact with the virtual surface, the steering angle is set so as to prohibit any motion which would penetrate the surface. When not in contact with the virtual surface, the steering motor adjusts the steering angle in response to the user's applied forces, to provide apparent freedom of motion to the user.
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Colgate James E.
Peshkin Michael A.
Northwestern University
Sircus Brian
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