A system and methods for non-optimal actuator detection are disclosed. A fluid valve controlling a fluid flow to a first actuator is activated, and the fluid valve is controlled to move the first actuator from an initial position to a first position and back to the initial position during a test int
A system and methods for non-optimal actuator detection are disclosed. A fluid valve controlling a fluid flow to a first actuator is activated, and the fluid valve is controlled to move the first actuator from an initial position to a first position and back to the initial position during a test interval. A measured valve position of the fluid valve is measured during the test interval, and a measured valve travel is calculated based on the measured valve position at an end of the test interval. A health status of the first actuator is determined based on the measured valve travel and an expected valve travel.
대표청구항▼
1. A method for non-optimal actuator detection, the method comprising: activating a fluid valve controlling a fluid flow to a first actuator;controlling the fluid valve to move the first actuator from an initial position to a first position and back to the initial position during a test interval;mea
1. A method for non-optimal actuator detection, the method comprising: activating a fluid valve controlling a fluid flow to a first actuator;controlling the fluid valve to move the first actuator from an initial position to a first position and back to the initial position during a test interval;measuring a measured valve position of the fluid valve during the test interval;calculating a measured valve travel based on the measured valve position at an end of the test interval; anddetermining a health status of the first actuator based on the measured valve travel and an expected valve travel. 2. The method of claim 1, further comprising damping a second actuator coupled to a device coupled to the first actuator. 3. The method of claim 1, further comprising calculating the expected valve travel of the fluid valve based on the fluid flow. 4. The method of claim 3, wherein the step of calculating the expected valve travel further comprises: measuring a fluid supply line pressure of a fluid supply line coupled to the fluid valve;measuring a differential pressure across an actuator piston of the first actuator;computing a flow gain based on the fluid supply line pressure and the differential pressure;measuring a piston position of the first actuator;computing a piston velocity based on one of a piston position command and the piston position;computing an expected valve position based on the flow gain and the piston velocity; andcalculating the expected valve travel based on the expected valve position. 5. The method of claim 1, wherein the step of calculating the measured valve travel based on the measured valve position further comprises: receiving the measured valve position during the first actuator moving from the initial position to the first position and back to the initial position;capturing a measured substantially maximum valve position of the measured valve position;capturing a measured substantially minimum valve position of the measured valve position; andcomputing a difference between the measured substantially maximum valve position and the measured substantially minimum valve position to provide the measured valve travel. 6. The method of claim 5, wherein the measured substantially maximum valve position comprises at least one member selected from the group consisting of: a forward flow setting, and a reverse flow setting. 7. The method of claim 1, wherein the step of determining the health status further comprises: computing a valve travel difference between the measured valve travel and the expected valve travel; andindicating a non-optimal actuator if the valve travel difference exceeds a threshold. 8. The method of claim 1, further comprising controlling the fluid valve to move the first actuator from the initial position to the first position, to a second position, back to the first position, and back to the initial position during the test interval. 9. A non-optimal actuator detection system comprising: a control module operable to: activate a fluid valve controlling a fluid flow to a first actuator; andcontrol the fluid valve to move the first actuator from an initial position to a first position and back to the initial position during a test interval;a sensing module operable to measure a measured valve position of the fluid valve during the test interval; andan evaluation module operable to: calculate a measured valve travel based on the measured valve position at an end of the test interval; anddetermine a health status of the first actuator based on the measured valve travel and an expected valve travel. 10. The system of claim 9, further comprising a second actuator coupled to a device coupled to the first actuator, wherein the second actuator operates in a damped mode. 11. The system of claim 10, wherein the device comprises a flight control surface coupled to an aircraft. 12. The system of claim 9, further comprising an expected valve travel module operable to compute the expected valve travel of the fluid valve based on the fluid flow. 13. The system of claim 12, wherein the expected valve travel module is further operable to: receive a measured fluid supply line pressure of a fluid supply line coupled to the fluid valve;receive a measured differential pressure across an actuator piston of the first actuator;compute a flow gain based on the measured fluid supply line pressure and the measured differential pressure;receive a measured piston position of the first actuator;compute a piston velocity based on the measured piston position;compute an expected valve position based on the flow gain and the piston velocity; andcompute the expected valve travel based on the expected valve position. 14. The system of claim 9, further comprising a measured valve travel module operable to: receive the measured valve position during the first actuator moving from the initial position to the first position and back to the initial position;capture a measured substantially maximum valve position of the measured valve position;capture a measured substantially minimum valve position of the measured valve position; andcompute a difference between the measured substantially maximum valve position and the measured substantially minimum valve position to provide the measured valve travel. 15. The system of claim 14, wherein the measured substantially maximum valve position comprises at least one member selected from the group consisting of: a forward flow setting, and a reverse flow setting. 16. The system of claim 9, wherein the control module is further operable to control the fluid valve to move the first actuator from the initial position to the first position, to a second position, back to the first position, and back to the initial position during the test interval. 17. The system of claim 9, wherein the evaluation module is further operable to: compute a valve travel difference between the measured valve travel and the expected valve travel; andindicate a non-optimal actuator if the valve travel difference exceeds a threshold. 18. A computer readable storage medium comprising computer-executable instructions for performing a method for actuator leakage detection, the method executed by the computer-executable instructions comprising: activating a fluid valve controlling a fluid flow to a first actuator;controlling the fluid valve to move the first actuator from an initial position to a first position and back to the initial position;measuring a measured valve position of the fluid valve during a test interval;calculating a measured valve travel based on the measured valve position; anddetermining a health status of the first actuator based on the measured valve travel and an expected valve travel. 19. The computer readable storage medium of claim 18, the method executed by the computer-executable instructions further comprising calculating the expected valve travel of the fluid valve based on the fluid flow. 20. The computer readable storage medium of claim 18, the method executed by the computer-executable instructions further comprising: receiving the measured valve position during the first actuator moving from the initial position to the first position and back to the initial position;capturing a measured substantially maximum valve position of the measured valve position;capturing a measured substantially minimum valve position of the measured valve position; andcomputing a difference between the measured substantially maximum valve position and the measured substantially minimum valve position to provide the measured valve travel.
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이 특허에 인용된 특허 (11)
Deller,Robert W.; Lee,Joon H., Acceptance testing of actuators using backlash and stiction measurements.
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