Position Control System for Cross Coupled Operation of Fly-By-Wire Control Columns
First Claim
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1. An aircraft control system comprising:
- a first feedback assembly movable relative to a mechanical ground;
a first stick movable relative to the mechanical ground and the first feedback assembly, wherein;
a) a first stick position is the position of the first stick relative to the mechanical ground;
b) a first feedback position is the position of the first feedback assembly relative to the mechanical ground; and
c) a first relative error is the first stick position minus the first feedback position; and
a second feedback assembly movable relative to the mechanical ground;
a second stick movable relative to the mechanical ground and the second feedback assembly, wherein;
a) a second stick position is the position of the second stick relative to the mechanical ground;
b) a second feedback position is the position of the second feedback assembly relative to the mechanical ground; and
c) a second relative error is the second stick position minus the second feedback position; and
a control arrangement including a cross-coupled mode in which the control arrangement provides first and second feedback position commands to position the first and second feedback assemblies wherein the first feedback position command is equal to the second relative error and the second feedback position command is equal to the first relative error.
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Abstract
A aircraft control system is provided. that provides tactile feedback between control columns of the aircraft relating to discrepancies in the control inputs to the sticks of the respective control columns. In one implementation, the sticks each have an associated feedback assembly that is adjustable relative to mechanical ground to adjust the feedback profile applied to the corresponding stick. The position of each feedback assembly is adjusted based on a relative displacement between the other feedback assembly and its corresponding stick to provide active feedback relating to the control of the other control column.
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Citations
32 Claims
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1. An aircraft control system comprising:
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a first feedback assembly movable relative to a mechanical ground; a first stick movable relative to the mechanical ground and the first feedback assembly, wherein; a) a first stick position is the position of the first stick relative to the mechanical ground; b) a first feedback position is the position of the first feedback assembly relative to the mechanical ground; and c) a first relative error is the first stick position minus the first feedback position; and a second feedback assembly movable relative to the mechanical ground; a second stick movable relative to the mechanical ground and the second feedback assembly, wherein; a) a second stick position is the position of the second stick relative to the mechanical ground; b) a second feedback position is the position of the second feedback assembly relative to the mechanical ground; and c) a second relative error is the second stick position minus the second feedback position; and a control arrangement including a cross-coupled mode in which the control arrangement provides first and second feedback position commands to position the first and second feedback assemblies wherein the first feedback position command is equal to the second relative error and the second feedback position command is equal to the first relative error. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An aircraft control system comprising:
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a first stick, and a first feedback arrangement providing a passive first feedback profile for the first stick relative to mechanical ground, at least a portion of the first feedback arrangement being movable relative to the mechanical ground and the first stick for adjusting the first feedback profile; and a first actuator coupled to the first passive feedback arrangement for adjusting the position of the first passive feedback arrangement relative to the mechanical ground for adjusting the first feedback profile; a second feedback arrangement providing a passive second feedback profile for the second stick relative to mechanical ground, at least a portion of the second feedback arrangement being movable relative to the mechanical ground and the second stick for adjusting the second feedback profile; a second actuator for adjusting the position of the second passive feedback arrangement relative to the mechanical ground for adjusting the second feedback profile; and a feedback controller arrangement configured to control the first actuator for adjusting the position of the first passive feedback arrangement relative to the mechanical ground, the feedback controller arrangement is configured to control the second actuator for adjusting the position of the second passive feedback arrangement relative to the mechanical ground. - View Dependent Claims (12, 13, 14, 15)
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16. An aircraft control system comprising:
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a first stick movable relative to a mechanical ground, wherein a first stick position is the position of the first stick relative to a first common neutral position of the mechanical ground; a second stick movable relative to the mechanical ground; a second feedback assembly movable relative to the mechanical ground and the second stick, wherein; a) a second stick position is the position of the second stick relative to a second common neutral position of the mechanical ground; b) a second feedback position is the position of the second feedback assembly relative to the mechanical ground; and a control arrangement configured to control the position of the second feedback assembly to bias the second stick toward the second stick position being equal to the first stick position.
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17. A method of providing feedback to a control stick of an aircraft comprising the steps of:
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sensing a first stick position which is the position of a first stick relative to a mechanical ground; sensing a first feedback position which is the position of a first feedback assembly relative to the mechanical ground; determining a first relative error which is the first stick position minus the first feedback position; and adjusting a second feedback position, which is the position of a second feedback assembly of a second stick relative to the mechanical ground, such that the second feedback position is equal to the first relative error. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A method of providing feedback to a control stick of an aircraft comprising the steps of:
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sensing a first stick position which is the position of a first stick relative to a mechanical ground; sensing a first feedback position which is the position of a first feedback assembly relative to the mechanical ground; sensing a second stick position which is the position of a second stick relative to the mechanical ground; determining a first relative error which is the second stick position minus the first stick position; and adjusting the first feedback position by adding the first relative error to the first feedback position. - View Dependent Claims (25)
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26. A method of providing tactile feedback to a first stick of an aircraft control system comprising the steps of:
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providing passive feedback when the first stick is moved from a first feedback neutral position of a first feedback assembly; and adjusting the position of the first feedback neutral position of the first feedback assembly relative to a ground neutral position to adjust the biasing applied to the first stick by the first feedback assembly. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification