System for control of an aerodynamic surface of an aircraft
First Claim
1. A system for control of an aerodynamic surface (1) of an aircraft, comprising:
- (a) an intentional actuation member (5) associated with a transducer (6) for delivering an electrical signal (dp) representing a demanded deflection of said aerodynamic surface (1);
(b) a hydraulic jack (2) intended to deflect said aerodynamic surface (1) under the control of a servovalve (3) and of a servocontroller (4);
(c) means (14) for detecting the difference in pressures (Δ
P) prevailing in said jack (2), on either side of the piston (2C) of the latter; and
(d) first calculation means receiving said electrical signal (dp) representing a demanded deflection and deriving a deflection command addressed to said servovalve (3), said first calculation means (11) comprising;
(i) a computer (18) delivering values of a coefficient (K) which is a decreasing function of said difference in pressures (Δ
P); and
(ii) a multiplier (19) receiving said electrical signal (dp) representing a demanded deflection and said coefficient (K) and addressing a first deflection command (C2) formed by the product of said signal and said coefficient to said servovalve,said computer (18) calculating the values of said coefficient (K) in real time, as a function of the instantaneous value of said difference in pressures (Δ
P).
4 Assignments
0 Petitions
Accused Products
Abstract
System for control of an aerodynamic surface (1) of an aircraft, comprising an intentional actuation member (5) and a hydraulic jack (2) intended to deflect said aerodynamic surface (1).
According to the invention, the system comprises means (14) for detecting the difference in pressures prevailing in said jack (2), on either side of the piston (2C) of the latter, and calculation means (11) comprising:
a computer delivering values of a coefficient which is a decreasing function of said difference in pressures; and
a multiplier receiving an electrical signal (dp) representing a demanded deflection and said coefficient and addressing a first deflection command (C2) formed by the product of said signal and said coefficient to said servovalve.
25 Citations
14 Claims
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1. A system for control of an aerodynamic surface (1) of an aircraft, comprising:
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(a) an intentional actuation member (5) associated with a transducer (6) for delivering an electrical signal (dp) representing a demanded deflection of said aerodynamic surface (1); (b) a hydraulic jack (2) intended to deflect said aerodynamic surface (1) under the control of a servovalve (3) and of a servocontroller (4); (c) means (14) for detecting the difference in pressures (Δ
P) prevailing in said jack (2), on either side of the piston (2C) of the latter; and(d) first calculation means receiving said electrical signal (dp) representing a demanded deflection and deriving a deflection command addressed to said servovalve (3), said first calculation means (11) comprising; (i) a computer (18) delivering values of a coefficient (K) which is a decreasing function of said difference in pressures (Δ
P); and(ii) a multiplier (19) receiving said electrical signal (dp) representing a demanded deflection and said coefficient (K) and addressing a first deflection command (C2) formed by the product of said signal and said coefficient to said servovalve, said computer (18) calculating the values of said coefficient (K) in real time, as a function of the instantaneous value of said difference in pressures (Δ
P). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for control of an aerodynamic surface (1) of an aircraft, comprising:
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(a) an intentional actuation member (5) associated with a transducer (6) for delivering an electrical signal (dp) representing a demanded deflection of said aerodynamic surface (1); (b) a hydraulic jack (2) intended to deflect said aerodynamic surface (1) under the control of a servovalve (3) and of a servocontroller (4); (c) means (14) for detecting the difference in pressures (Δ
P) prevailing in said jack (2), on either side of the piston (2C) of the latter; and(d) first calculation means receiving said electrical signal (dp) representing a demanded deflection and deriving a deflection command addressed to said servovalve (3), said first calculation means (11) comprising; (i) a computer (18) delivering values of a coefficient (K) which is a decreasing function of said difference in pressures (Δ
P); and(ii) a multiplier (19) receiving said electrical signal (dp) representing a demanded deflection and said coefficient (K) and addressing a first deflection command (C2) formed by the product of said signal and said coefficient to said servovalve, said computer (18) delivering a fixed value (K1, K2, . . . Kn+1) of said coefficient (K) for each of a few regions subdividing the range of possible variations in said difference in pressures (Δ
P). - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification