Open loop load force estimation systems and methods
First Claim
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1. A system for determining a current amount of force applied to a disc brake system of an aircraft, the system comprising:
- an aircraft brake having a plurality of discs including an outer disc;
an actuator configured to apply a force to the outer disc to compress the plurality of discs to reduce an angular velocity of wheels of the aircraft;
a current sensor coupled to the actuator and configured to detect a detected amount of current applied to the actuator; and
a controller coupled to the current sensor and configured to receive input parameters including a maximum force that can be applied by the actuator, a maximum current of the actuator that causes the actuator to apply the maximum force, and an efficiency fraction of the actuator that corresponds to an efficiency of the actuator and to determine an estimate of the current amount of force applied to the outer disc based on the detected amount of current and the input parameters.
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Abstract
What is described is a system for determining a force applied to an outer disc of an aircraft brake by an actuator motor. The system includes a current sensor coupled to the actuator motor and configured to detect an amount of current applied to the actuator motor. The system also includes a controller coupled to the current sensor. The controller is configured to determine an estimate of the force applied to the outer disc based on the detected amount of current and predetermined input parameters.
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Citations
14 Claims
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1. A system for determining a current amount of force applied to a disc brake system of an aircraft, the system comprising:
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an aircraft brake having a plurality of discs including an outer disc; an actuator configured to apply a force to the outer disc to compress the plurality of discs to reduce an angular velocity of wheels of the aircraft; a current sensor coupled to the actuator and configured to detect a detected amount of current applied to the actuator; and a controller coupled to the current sensor and configured to receive input parameters including a maximum force that can be applied by the actuator, a maximum current of the actuator that causes the actuator to apply the maximum force, and an efficiency fraction of the actuator that corresponds to an efficiency of the actuator and to determine an estimate of the current amount of force applied to the outer disc based on the detected amount of current and the input parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for determining a force applied to an outer disc of an aircraft brake by an actuator, the method comprising:
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receiving, at a controller of an aircraft and by a current sensor of the aircraft, a detected amount of current applied to the actuator; receiving, at the controller, the detected amount of current and input parameters including a maximum force that can be applied by the actuator, a maximum current of the actuator that causes the actuator to apply the maximum force and an efficiency fraction of the actuator that corresponds to an efficiency of the actuator; determining, by the controller, a mode of operation of the actuator including a first mode indicating that the force applied to the outer disc increases proportionally as an amount of current applied to the actuator increases, a second mode indicating that the force applied to the outer disc remains substantially constant as the amount of current applied to the actuator decreases a first amount and a third mode indicating that the force applied to the outer disc decreases proportionally as the amount of current applied to the actuator decreases a second amount; and determining, by the controller, an estimated amount of force applied to the outer disc of the aircraft brake by the actuator based on the input parameters and the detected amount of current. - View Dependent Claims (11, 12, 13, 14)
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Specification