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US 4,751,443 AGranted
Servo simulator
AssigneeHoneywell Inc.
InventorsJoseph W. Jackson, Theodore C. Ebbinga
Life of this patent
Estimating the term…
Abstract
A servo system simulator utilizing an electronic equivalent of the servomotor to drive a programmable electronic load which mimics the actual load encountered by the servo system simulated.
Claims10
An apparatus for electronically simulating operating characteristics of a servomotor comprising:
- input means for receiving drive signals from an external control source;
- inductance and resistance means serially coupled to said input means and having inductance and resistance values equal to that of said servomotor;
- torque means coupled to said resistance means for providing first and second torque signals representative of torques applied to said servomotor;
- motor speed means coupled to receive said first torque signals for providing motor speed signals representative of motor speeds of said servomotor;
- frictional forces means coupled to receive said motor speed signals for providing signals representative of frictional forces experienced by said servomotor to said motor speed means;
- means for providing bias signals;
- and
- back emf means coupled to receive said second torque signals, said motor speed signals and said bias signals and coupled to said input means via said resistance and inductance means for providing signals representative of back emf generated by said servomotor to said input means.
5 more elements
Electronic apparatus for simulating operating characteristics of a servomotor comprising:
- input means for receiving drive signals from an external control source;
- inductance and resistance means serially coupled to said input terminals and having inductance and resistance values equal to inductance and resistance values of said servomotor;
- amplifier means having output terminals coupled to said inductance and resistance means for providing simulated back emf signals to said input means;
- a signal integrator having a time constant respresentative of inertia inherent in said servomotor;
- signal combining means for coupling a combination of several individual simulated torque signals to input terminals of said amplifier means through said integrator;
- dual slope gain amplifier means coupled through said combining means to said integrator in a negative feedback relationship, such that an integrated net torque signal representative of said servmotor's rotor speed is provided, said dual slope gain amplifier having a gain selected to provide signals representative of frictional forces experienced by said servomotor at said rotor speed;
- input current-responsive amplifer means coupled to said resistance means for producing an output voltage proportional to current levels flowing through said resistance means and having a gain adjusted such that said output signal represents motor torque at said current levels;
- means for applying said output signal to said signal combining means;
- means for applying an externally generated load torque voltage to said signal combining means;
- and
- buffer amplifying means coupled to said integrating means for providing a tachometer signal to external load means.
8 more elements
Dependencies are inferred from the claim text.