Velocity feedback compensation for force control systems
AssigneeThe Boeing Company
InventorsNorman J. Englund, Gerard V. Bohr
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Abstract
A force control system (50, 300) for actuation of a test object (54, 304) includes a force actuator (52, 356) that is coupled to and applies a force on the test object (54, 304). A velocity signal generator (124, 310) is in a feedback configuration relative to the force actuator and generates a velocity signal (150, 324) that is indicative of the velocity of the test object (54, 304). A controller (62, 302) is coupled to the force actuator (52, 356) and to the velocity signal generator (124, 310) and generates a desired applied force signal (130, 380) compensated by the velocity signal (150, 324).
Claims25
A controlled system for application of force on a test object comprising:
- at least one force actuator coupled to and applying a force on the test object;
- a velocity signal generator in a feedback configuration relative to said at least one force actuator and generating a velocity signal indicative of the velocity of the test object;
- and a controller coupled to said at least one force actuator and said velocity signal generator and generating a desired applied force signal compensated by said velocity signal.
A force control system for testing of an object comprising:
- at least one fluid valve driver;
- at least one fluid control valve coupled to said at least one fluid valve driver;
- at least one hydraulic actuator coupled to said at least one fluid control valve and the test object, said at least one hydraulic actuator applying a force on the test object;
- a velocity signal generator in a feedback configuration relative to said at least one hydraulic actuator and generating a velocity signal indicative of the velocity of the test object;
- and a controller coupled to said at least one force actuator and said velocity signal generator and generating a desired applied force signal compensated by said velocity signal.
A method of applying a force on a test object comprising:
- applying a force on the test object;
- generating a velocity signal indicative of the velocity of the test object in a feedback configuration relative to the actual velocity of the test object;
- generating an actual load signal indicative of an actual load on the test object;
- generating a velocity scaling signal relative to the fluid power available to a servovalve and in a feedback configuration;
- generating a desired applied force signal in response to said load signal as compensated by said velocity signal and said velocity scaling signal;
- and following the motion of the test object while applying a force in response to said desired applied force signal.
Dependencies are inferred from the claim text.