Servo control intended for controlling the position of a moving element of an aircraft made of two separate materials

Abstract

Servo control intended for controlling the position of a mobile element of an aircraft made of two distinct materials The servo control (18) comprises: - a power device (30) comprising at least one hydraulic cylinder (32); and - a piloting device (60) configured to control the power device (30) according to a command to move the mobile element. The piloting device (60) comprises at least one piloting unit (62) comprising: + a set of electronic, mechanical and / or hydraulic accessories in fluid communication with the hydraulic cylinder (32); and + a body delimiting a network of tubular cavities fluidly connecting the accessories as well as the hydraulic cylinder (32). At least a portion of the hydraulic cylinder (32) is made of a first material, the body of the piloting unit (62) being made of a second material distinct from the first material. Figure for the abstract: Figure 2

Description

Title of the invention: Servo control intended for controlling the position of a mobile element of an aircraft made of two distinct materials

[0001] The present invention relates to a servocontrol intended for controlling the position of a mobile element of an aircraft.

[0002] The present invention further relates to:

[0003] - an architecture for controlling the position of the mobile element, comprising a such servo control;

[0004] - a method of producing the servo control;

[0005] - a series of servo drives in which each servo drive is intended for the control of the position of a moving element of the aircraft; and

[0006] - a method of producing the series of servo controls.

[0007] In a known manner, aircraft servocontrols are intended for the precise control of the position of a mobile element of the aircraft, in particular that of a control surface of the aircraft, in particular a depth or rudder control surface located on the rudder, or that of ailerons or flaps located on the wings.

[0008] Such servocontrols comprise a power device mechanically linked to the mobile element and a piloting device receiving the flight commands and piloting the power device according to these commands. The power device comprises at least one hydraulic cylinder capable of cooperating with the mobile element and the piloting device comprises at least one piloting unit fluidically, mechanically and electrically connected to the hydraulic cylinder.

[0009] Usually, the hydraulic cylinder of the power device and the control unit of the control device form a single monobloc body made of the same material.

[0010] These known servocontrols are not, however, entirely satisfactory. Indeed, the known servocontrols do not allow adaptability and modularity for controlling a wide range of moving elements of the aircraft. In particular, the servocontrol must have weight and size characteristics which depend heavily on their location within the aircraft and the force to be deployed to move the moving element.

[0011] An objective of the invention is then to provide a servo control offering satisfactory adaptability and modularity depending on the mobile element that this said servo control is intended to control.

[0012] To this end, the invention relates to a servocontrol intended for controlling the position of a mobile element of an aircraft, comprising:

[0013] - a power device configured to move the movable element, the device power comprising at least one hydraulic cylinder extending along a cylinder axis; and

[0014] - a control device configured to control the power device in function of a command to move the mobile element received from a device for generating the command to move the mobile element, the control device comprising at least one control unit comprising:

[0015] + a set of electronic, mechanical and / or hydraulic accessories in com fluid communication with the hydraulic cylinder; and

[0016] + a body delimiting a network of tubular cavities fluidly connecting the ac electronic, mechanical and / or hydraulic accessories as well as the hydraulic cylinder, a neutral fiber being defined for each tubular cavity;

[0017] at least a portion of the at least one hydraulic cylinder is made of a first material, the body of the at least one control unit being made of a second material distinct from the first material.

[0018] According to particular embodiments of the invention, the servo control also has one or more of the following characteristics, taken in isolation or in any technically possible combination(s):

[0019] - the neutral fiber of at least one tubular cavity is curved;

[0020] - the body of the at least one control unit is produced by additive manufacturing;

[0021] - the first material is an aluminum alloy, the second material being a titanium alloy;

[0022] - it comprises a connection device between the power device and the device control, the connection device comprising at least one connection piece between the network of tubular cavities and the hydraulic cylinder, the at least one connection piece being movable relative to the body of the control unit and / or relative to the hydraulic cylinder to allow differential expansion of the body of the control unit and the hydraulic cylinder relative to each other;

[0023] - the hydraulic cylinder comprises a cylinder extending along the cylinder axis and limiting a chamber, a rod extending along the cylinder axis into the chamber and a piston mounted on the rod in the chamber,

[0024] at least one between the cylinder of the hydraulic jack and the body of the control unit comprising a cylindrical connection cavity in fluid communication with respectively the network of tubular cavities or the chamber of the hydraulic jack,

[0025] the at least one connecting piece being arranged so as to be movable in translation in the cylindrical connecting cavity during the differential expansion of the body of the control unit and the hydraulic cylinder relative to each other;

[0026] - the cylindrical connection cavity extends along an axis substantially parallel to the axis of a jack, the at least one connecting part being movable in translation in the cylindrical connecting cavity along the jack axis;

[0027] - the cylindrical connection cavity is delimited by an internal wall,

[0028] the at least one connecting piece comprising a cylindrical portion delimiting a connecting pipe and extending into the cylindrical connecting cavity, and at least one annular projection cooperating with the internal wall of the cylindrical connecting cavity to connect in a sealed manner the network of tubular cavities of the control unit and the hydraulic cylinder; and

[0029] - the power device comprises at least one additional hydraulic cylinder identical to the hydraulic cylinder and extending along an additional cylinder axis substantially parallel to the cylinder axis; and

[0030] - the control device comprises at least one additional control unit identical to the control unit, the at least one additional control unit being associated with the at least one additional hydraulic cylinder;

[0031] - the curved neutral fiber has a continuously derivable curvature;

[0032] - the at least one tubular cavity whose neutral fiber is curved is devoid of sharp edges between its ends;

[0033] - at least one tubular cavity, in particular the at least one tubular cavity of which the neutral fiber is curved, has no bifurcation and / or branching between its ends;

[0034] - the connecting device further comprising at least two screws, the connecting part further comprises two wings each formed by a plate comprising a screw passage orifice, the power device and the control device each comprising at least two screw passage orifices, each screw extending through the passage orifices of the power device, the control device and the connection device;

[0035] The invention further relates to an architecture for controlling the position of a mobile element of an aircraft, comprising:

[0036] - a device for generating a command to move the mobile element configured to generate a command to move the movable element; and

[0037] - a servo control as defined above, intended for position control of the moving element, depending on the movement command of the moving element.

[0038] Also, the invention relates to a method for producing a servo control as described above, comprising the following steps:

[0039] - forming at least one hydraulic cylinder of the power device by machining of at least one block of the first material;

[0040] - production of a rough draft of the body of the at least one control unit by fa additive building from the second material;

[0041] - production of the body of the at least one control unit by machining the blank;

[0042] - formation of at least one control unit of the control device by ins installation of electronic, mechanical and / or hydraulic accessories in the body;

[0043] - assembly of the power device and the control device to form the servo control.

[0044] According to particular embodiments of the invention, the method for producing the servocontrol also has one or more of the following characteristics, taken in isolation or in any technically possible combination(s):

[0045] - the blank of the body comprises at least one tubular cavity whose neutral fiber is curve; and

[0046] - the assembly step comprises the arrangement of at least one connecting device between the power device and the control device, the arrangement of the at least one connecting device comprising the arrangement of a connecting piece between the network of tubular cavities and the hydraulic cylinder, the at least one connecting piece being movable relative to the body of the control unit and / or relative to the hydraulic cylinder to allow differential expansion of the body of the control unit and the hydraulic cylinder relative to each other.

[0047] Furthermore, the invention relates to a series of servocontrols as described below:

[0048] - each servo control is intended for controlling the position of a moving element of the aircraft, each servo control comprising a power device and a piloting device, said piloting device and said power device being capable of being assembled to form, in an assembled configuration, said servo control, the series comprising a first servo control and a second servo control distinct from the first servo control, the power device of the second servo control being identical to the power device of the first servo control, the piloting device of the second servo control being different from the piloting device of the first servo control, or / and

[0049] the series comprising a third servo control distinct from the first servo control, the power device of the third servo control being different from the power device of the first servo control, the control device of the third servo control being identical to the control device of the first servo control.

[0050] According to particular embodiments of the invention, the servo control series also has one or more of the following characteristics, taken in isolation or in any technically possible combination(s):

[0051] - the hydraulic cylinder of each power device comprises a first fixed ball joint in translation along the cylinder axis and a second ball joint intended to be integral with the movable element and movable in translation along the cylinder axis, the first ball joint being movable in rotation around a first axis of rotation substantially orthogonal to the cylinder axis, the second ball joint being movable in rotation around a second axis of rotation substantially orthogonal to the cylinder axis, the first and second axes of rotation being separated along the cylinder axis by a center distance, the power device of the first servo control having at least one differentiating characteristic compared to the power device of the third servo control, the at least one differentiating characteristic being taken from the following list of differentiating characteristics:

[0052] - the diameter of the hydraulic cylinder; and / or

[0053] - the stroke of the hydraulic cylinder;

[0054] - the center distance; and

[0055] - the body of the control unit of the first servo control is identical to the body of the control unit of the second servo control, the set of electronic, mechanical and / or hydraulic accessories of the control unit of the first servo control being distinct from the set of electronic, mechanical and / or hydraulic accessories of the control unit of the second servo control.

[0056] Also, the invention relates to a method of producing a series of servocontrols, the series being as described below:

[0057] - providing a plurality of distinct power devices;

[0058] - provision of a plurality of separate control devices;

[0059] - assembly of a first combination of a power device among the a plurality of separate power devices and a drive device among the plurality of separate drive devices to form a first servo drive;

[0060] - assembly of a second combination of a power device among the a plurality of distinct power devices and a drive device from among the plurality of distinct drive devices to form a second servo drive, the second combination being distinct from the first combination.

[0061] Optionally, the method for producing the series of servocontrols is such that the step of providing a plurality of separate control devices comprises the following sub-steps:

[0062] - providing a plurality of control unit bodies, the bodies being identical;

[0063] - provision of a plurality of first sets of electrical accessories electronic, mechanical and / or hydraulic and a plurality of second sets of electronic, mechanical and / or hydraulic accessories, the first sets being distinct from the second sets;

[0064] - formation of a first control unit by installing a first assembly electronic, mechanical and / or hydraulic accessories in a control unit body and without installation of a second set of electronic, mechanical and / or hydraulic accessories;

[0065] - formation of a second control unit by installing a second set of electronic, mechanical and / or hydraulic accessories in a control unit body.

[0066] The invention also relates to a servocontrol intended for controlling the position of a mobile element of an aircraft, comprising:

[0067] - a power device configured to move the movable element, the device power comprising at least one hydraulic cylinder extending along a cylinder axis; and

[0068] - a control device configured to control the power device in function of a command to move the mobile element received from a device for generating the command to move the mobile element, the control device comprising at least one control unit comprising:

[0069] + a set of electronic, mechanical and / or hydraulic accessories in com fluid communication with the hydraulic cylinder; and

[0070] + a body delimiting a network of tubular cavities fluidly connecting the ac electronic, mechanical and / or hydraulic accessories as well as the hydraulic cylinder, the body comprising an external surface, at least a first connection portion between the network and the hydraulic cylinder and at least a second connection portion between the network and the hydraulic cylinder, a neutral fiber being defined for each tubular cavity;

[0071] wherein the neutral fiber of at least one tubular cavity is curved.

[0072] According to particular embodiments of the invention, the servocontrol also has one or more of the following characteristics, taken in isolation or in any technically possible combination(s):

[0073] - the body of the at least one control unit is produced by additive manufacturing;

[0074] - at least a part of the jack is made of a first material, the body of the jack at least one control unit being made of a second material distinct from the first material;

[0075] - the first material is an aluminum alloy, the second material being a titanium alloy;

[0076] - the radius of curvature of the at least one curved neutral fiber is continuously derivable;

[0077] - each tubular cavity is devoid of sharp edges between its ends;

[0078] - at least one tubular cavity, in particular the at least one tubular cavity of which the neutral fiber is curved, has no bifurcation and / or branching between its ends;

[0079] - each tubular cavity extends between two respectively connecting ends has :

[0080] - the at least one first connecting portion;

[0081] - the at least one second connecting portion; or

[0082] - an electronic, mechanical and / or hydraulic accessory;

[0083] the at least one curved neutral fiber extending along the shortest path between its two ends, the shortest path being restricted by the presence of the other tubular cavities, the electronic, mechanical and / or hydraulic accessories and the external surface;

[0084] - the body comprises at least one shaped portion, the external surface of the portion shaped to fit the shape of at least one electronic, mechanical and / or hydraulic accessory and / or at least one tubular cavity, in particular at least one tubular cavity whose neutral fiber is curved;

[0085] - the shaped portion of the body has a thickness, taken orthogonally by relation to the external surface of the shaped portion between the external surface and:

[0086] - the nearest tubular cavity; or

[0087] - the nearest electronic, mechanical and / or hydraulic accessory;

[0088] the thickness being between 1 mm and 10 mm, preferably between 1 mm and 5 mm.

[0089] The invention further relates to an architecture for controlling the position of a mobile element of an aircraft, comprising:

[0090] - a device for generating a command to move the mobile element configured to generate a command to move the movable element; and

[0091] - a servo control as defined above, intended for position control of the moving element, depending on the movement command of the moving element.

[0092] Also, the invention relates to a method for producing a servo control as described above, comprising the following steps:

[0093] - formation of at least one hydraulic cylinder of the power device;

[0094] - production of a rough draft of the body of the at least one control unit by fa additive building such that at least one tubular cavity has a curved neutral fiber;

[0095] - production of the body of the at least one control unit by machining the blank;

[0096] - formation of at least one control unit of the control device per installation electronic, mechanical and / or hydraulic accessories in the body;

[0097] - assembly of the power device and the control device to form the servo control.

[0098] According to particular embodiments of the invention, the method for producing the servocontrol also has one or more of the following characteristics, taken in isolation or in any technically possible combination(s):

[0099] - the step of producing the rough shape of the body of the at least one control unit is without the use of additive manufacturing support;

[0100] - the body blank extends in a main direction from the rear to the front, the main direction being parallel to the cylinder axis when the power device and the pilot device are assembled,

[0101] the additive manufacturing being carried out in the main direction from back to front during the step of producing the roughing of the body of the at least one control unit,

[0102] the blank of the body having at least one cantilevered portion,

[0103] any surface of the at least one cantilevered portion oriented substantially rearwardly relative to the main direction having an angle with the main direction less than or equal to 45°; and

[0104] - when producing the body of the at least one control unit, the surfaces of the at least one cantilevered portion oriented substantially rearwardly relative to the main direction are machined to give them their final shape.

[0105] Other characteristics and advantages of the invention will appear on reading the description which follows, given solely by way of example and made with reference to the appended drawings, in which:

[0106] [Fig-1] [Fig.l] is a schematic top view of an example of an aircraft comprising a movable element and an architecture for controlling the position of the movable element, according to the invention;

[0107] [Fig.2] [Fig.2] is a perspective view from above of a servo control according to the invention, forming part of the control architecture [Fig.l];

[0108] [Fig.3] [Fig.3] is a sectional view along a section plane marked III in [Fig.2];

[0109] [Fig.4] [Fig.4] is an enlarged view of a detail marked IV in [Fig.3];

[0110] [Fig.5] [Fig.5] is a sectional view along a section plane marked V on the [Fig.3] ;

[0111] [Fig.6] [Fig.6] is a perspective view of a connecting part of the connecting device of the servo control of [Fig.2];

[0112] [Fig.7] [Fig.7] is a schematic representation on the left side of a example of a body of a control unit according to the state of the art and on the right part of an example of a body of a control unit of the servo control of [Fig.2];

[0113] [Fig-8] [Fig.8] is a flowchart illustrating the process of producing the servo control of [Fig.2], according to the invention;

[0114] [Fig.9] [Fig.9] is a perspective view of a rough sketch of a body of a unit of control of a servo control according to the invention, obtained during the method of producing the servo control of [Fig.8];

[0115] [Fig. 10] [Fig. 10] is a perspective view of a body of a control unit of a servocontrol according to the invention, obtained by machining the blank of [Fig.9];

[0116] [Fig. 11] [Fig. 11] is a schematic representation of a series of servocontrols, according to the invention;

[0117] [Fig. 12] [Fig. 12] is a flowchart illustrating the method of producing the servo control series of [Fig. 11], according to the invention.

[0118] [Fig.l] illustrates an aircraft 10.

[0119] The aircraft 10 comprises at least one mobile element 12 and an architecture 14 for controlling the position of the mobile element 12, according to the invention.

[0120] The movable element 12 is for example movable between a plurality of distinct positions.

[0121] The mobile element 12 is for example a flight control surface of the aircraft 10. In particular, in the example of [Fig.l], the mobile element 12 is an aileron of the aircraft 10 mounted movably on a wing of the aircraft 10.

[0122] According to non-illustrated examples, the mobile element 12 is a depth control or a rudder of the aircraft 10, mounted mobile on a rudder of the aircraft 10.

[0123] According to another example not illustrated, the mobile element 12 is a flap of the aircraft 10.

[0124] The control architecture 14 comprises a device 16 for generating a command to move the mobile element 12 configured to generate a command to move the mobile element 12 and a servocontrol 18 intended to control the position of the mobile element, as a function of the command to move the mobile element 12.

[0125] Advantageously, the control architecture 14 further comprises a control system 20 capable of being actuated by a pilot to control the position of the mobile element 12.

[0126] The control system 20 is notably installed in a cockpit of the aircraft 10.

[0127] For example, the control system 20 comprises a flight control lever for the aircraft 10. According to the example of [Fig. 1], the control lever is for example a control lever for the aileron of the aircraft 10.

[0128] The device 16 is configured to generate the movement command of the mobile element 12 as a function of an actuation of the control system 20 by the pilot.

[0129] For example, the device 16 is an on-board computer.

[0130] With reference to Figures 2 and 3, the servocontrol 18 comprises a power device 30 configured to move the mobile element 12 and a piloting device 60 configured to control the power device 30 as a function of the command to move the mobile element 12 received from the device 16 of the aircraft 10.

[0131] Advantageously, as illustrated in Figures 2 to 4, the servocontrol 18 further comprises a connection device 120 between the power device 30 and the control device 60.

[0132] As illustrated in Figures 2 and 3, the power device 30 comprises at least one hydraulic cylinder 32 extending along a cylinder axis A-A'.

[0133] We define in the following:

[0134] - a longitudinal axis L parallel to the cylinder axis A-A';

[0135] - a transverse axis T orthogonal to the longitudinal axis L so that the servo control 18 extends substantially along a plane P comprising the longitudinal axis L and the transverse axis T; and

[0136] - a vertical axis V orthogonal to the longitudinal axis L and to the transverse axis T.

[0137] Advantageously, as visible in Figures 2 and 3, the power device 30 comprises at least one additional hydraulic cylinder 34 identical to the hydraulic cylinder 32 and extending along an additional cylinder axis B-B' substantially parallel to the cylinder axis A-A'.

[0138] According to the example illustrated in Figures 2 and 3, the power device 30 comprises exactly one hydraulic cylinder 32 and one additional hydraulic cylinder 34, fixed to each other substantially side by side in the plane P.

[0139] In the following, for the sake of brevity, a single hydraulic cylinder 32 is described.

[0140] At least a portion of the hydraulic cylinder 32 is made of a first material. According to a particular example, the entire hydraulic cylinder 32 is made of the first material.

[0141] Advantageously, the first material is an aluminum alloy, in particular an aluminum alloy 2050, 2024 or 7175.

[0142] As illustrated in the example of Figures 2 to 4, the hydraulic cylinder 32 comprises a cylinder 38, a rod 54 and a piston 56.

[0143] Advantageously, the hydraulic cylinder 32 further comprises a first ball joint 57 fixed in translation along the longitudinal axis L and a second ball joint 58 secured to the mobile element 12 and mobile in translation along the longitudinal axis L.

[0144] The cylinder 38 extends along the jack axis A-A'.

[0145] The cylinder 38 delimits a chamber 39 and comprises at least a first portion 40 and at least a second portion 42 of connection between the chamber 52 and a unit of control 62 of the control device 60 (which will be described later).

[0146] The chamber 39 comprises an upstream portion 39A and a downstream portion 39B and is intended to receive a fluid.

[0147] The first 40 and second 42 connecting portions of the cylinder 38 each comprise a cylindrical connecting cavity 44 fluidly connected to the chamber 39 and to the control unit 62, in particular to a network 96 of tubular cavities 98 of the control unit (which will be described later). The cylindrical connecting cavity 44 of the first connecting portion 40 of the cylinder 38 is indicated in [Fig. 4].

[0148] In the following, for the sake of brevity and as illustrated in the example of Figures 2 to 4, it is considered that the cylinder 38 comprises a single first connection portion 40 and a single second connection portion 42.

[0149] With reference to [Fig.5], the first connection portion 40 of the cylinder 38 further comprises two members 46 for connection with the connection device 120.

[0150] The two members 46 are arranged on either side of the plane P.

[0151] Each connecting member 46 comprises two plates 48 each extending substantially along a plane parallel to the transverse axis T and the vertical axis V and separated by a space 49 for receiving a wing 132 of a connecting part 122 of the connecting device 120. In particular, the receiving space 49 is dimensioned such that the spacing between the plates 48 corresponds substantially to the thickness of the wing 132 measured along the longitudinal axis L.

[0152] Each plate 48 comprises an orifice 50 for the passage of a screw 140 of the connection device 120.

[0153] The rod 54 extends along the cylinder axis A-A' in the chamber 39.

[0154] The piston 56 is mounted on the rod 54 in the chamber 39. Advantageously, the piston 56 came from material with rod 54.

[0155] The piston 56 separates the upstream portion 39A and the downstream portion 39B of the chamber 39.

[0156] The first ball joint 57 is fixed in translation along the longitudinal axis L and movable in rotation around a first axis of rotation RI substantially parallel to the transverse axis T. In particular, the first ball joint 57 is integral with the cylinder 38.

[0157] The second ball joint 58 is movable in translation along the longitudinal axis L and movable in rotation around a second axis of rotation R2 substantially parallel to the transverse axis T. In particular, the second ball joint 57 is integral with the piston.

[0158] As visible in [Fig.3], the first RI and second R2 axes of rotation are separated along the longitudinal axis L by a center distance EA.

[0159] As illustrated in Figures 2 and 3, the control device 60 comprises at least one control unit 62.

[0160] Advantageously, the control device 60 comprises at least one additional control unit 64 identical to the control unit 62 and associated with the at least an additional hydraulic cylinder 34.

[0161] According to the example illustrated in Figures 2 and 3, the control device 60 comprises exactly one control unit 62 and one additional control unit 64.

[0162] The control unit 62 is fixed and fluidically, mechanically and electrically connected to the hydraulic cylinder 32 and the additional control unit 64 is fixed and fluidically connected to the additional hydraulic cylinder 34.

[0163] In the following, for the sake of brevity, a single control unit 62 is described.

[0164] The control unit 62 comprises a set 68 of electronic, mechanical and / or hydraulic accessories 70 and a body 72.

[0165] Advantageously, the set 68 of accessories 70 depends on specific needs for controlling the position of the particular mobile element 12 controlled by the servo control 18. Thus, for example, for controlling different mobile elements 12, it is provided to install sets 68 corresponding to distinct combinations of accessories 70.

[0166] The electronic, mechanical and / or hydraulic accessories 70 are in fluid communication with the hydraulic cylinder 32, in particular via a network 96 of tubular cavities 98 extending in the body 72.

[0167] Advantageously, the electronic, mechanical and / or hydraulic accessories 70 are arranged in the body 72, in particular in cavities for receiving the accessories 70.

[0168] The accessories 70 are for example pistons, non-return valves, valves, pressure sensors, flow sensors, temperature sensors, distributions, accumulators.

[0169] As illustrated in Figures 2, 3, 4 and 7, the body 72 delimits the network 96 of tubular cavities 98.

[0170] Advantageously, the body 72 further comprises at least a first portion 76 of connection between the network 96 and the hydraulic cylinder 32, at least a second portion 78 of connection between the network 96 and the hydraulic cylinder 32, at least one shaped portion 88 and an external surface 90.

[0171] The body 72 of the control unit 62 is made of a second material distinct from the first material, advantageously by additive manufacturing.

[0172] Still advantageously, the second material is a titanium alloy, in particular a TA6V titanium alloy.

[0173] Advantageously, the first 76 and second 78 connection portions each comprise a cylindrical connection cavity 80 in fluid communication with the chamber 39 of the hydraulic cylinder 32. The cylindrical connection cavity 80 of the first connection portion 76 is indicated in [Fig.4].

[0174] In the following, for the sake of brevity and as illustrated by the example of Figures 2 to 5, it is considered that the body 72 comprises a single first connection portion 76 and a single second connection portion 78.

[0175] For example, as illustrated in Figures 2-5, the first connector portion 76 of the body 72 is in fluid communication with the first connector portion 40 of the cylinder 38 and the second connector portion 78 of the body 72 is in fluid communication with the second connector portion 42 of the cylinder 38.

[0176] The first 76 and second 78 connecting portions of the body 72, in particular their respective cylindrical connecting cavities 80, are connected by the set 68 of accessories 70.

[0177] With reference to [Fig.5], the first connection portion 76 of the body 72 further comprises two members 84 for connection with the connection device 120.

[0178] The cylindrical connection cavity 80 of the first 76 and / or the second 78 connection portions of the body 72 extends along an axis C-C' (visible in [Fig.4]) substantially parallel to the cylinder axis A-A'.

[0179] According to the example illustrated in Figures 2 to 5, the cylindrical connection cavity 80 of the first connection portion 76 of the body 72 extends along the axis C-C'.

[0180] Each cylindrical connection cavity 80 is delimited by an internal wall 82.

[0181] Each connecting member 84 comprises a plate 85 extending substantially along a plane parallel to the transverse axis T and the vertical axis V, in particular parallel to the extension plane of the plates 48 of the connecting members 46 of the jack 32.

[0182] Each plate 85 comprises an orifice 86 for the passage of a screw 140 of the connection device 120.

[0183] For example, as illustrated in Figures 2 and 7, the body 72 comprises at least one shaped portion 88, a portion 91 of which has a corresponding external surface 90 that matches the shape of at least one mechanical, electronic and / or hydraulic accessory 70 and / or at least one tubular cavity 98, in particular at least one tubular cavity 98 having a curved neutral fiber 100.

[0184] Advantageously, as illustrated on the right part of [Fig.7], the shaped portion 88 has a thickness E taken orthogonally with respect to the portion 91 of external surface 88 corresponding between said portion of external surface 88 and:

[0185] - the nearest tubular cavity 98; or

[0186] - the nearest electronic, mechanical and / or hydraulic accessory 70;

[0187] the thickness E being between 1 mm and 10 mm, preferably between 1 mm and 5 mm.

[0188] As illustrated in [Fig.7] which compares the invention (right part of [Fig.7]) and the state of the art (left part of [Fig.7]), the shaped portion 88 allows a gain in mass and reduces the pressure losses within the tubular cavity 98. Indeed, the body 72 has less material than the body 7 of the state of the art since in the invention the surface 90 matches the shape of the accessories 70 and / or the tubular cavities 98. In comparison, in the state of the art, the surface 9 of the body 7 is substantially flat and does not match the shape of either the accessories 8 or the tubular cavities 1, 2.

[0189] The network 96 of tubular cavities 98 fluidly connects the accessories 70 to each other as well as the accessories 70 to the hydraulic cylinder 32. In particular, the network 96 of tubular cavities 98 fluidly connects the cylindrical connection cavities 80 of the first 76 and second 78 connection portions and the accessories 70.

[0190] Each tubular cavity 98 extends between two ends 102, 104 respectively connected to:

[0191] - the first connecting portion 76, in particular the cylindrical cavity 80 of the first portion of connection 76;

[0192] - the second connecting portion 78, in particular the cylindrical cavity 80 of the second portion of connection 78; or

[0193] - an electronic, mechanical and / or hydraulic accessory 70.

[0194] [Fig.7] (right part) illustrates an example in which a tubular cavity 98, of which the neutral fiber 100 is curved, extends between an end 102 for connection to a first electronic, mechanical and / or hydraulic accessory 70A and a second end 104 for connection to a second electronic, mechanical and / or hydraulic accessory 70B.

[0195] Each tubular cavity 98 is delimited radially by an internal wall 106.

[0196] Each tubular cavity 98 is devoid of a sharp edge between its ends 102, 104. The left part of [Fig.7] illustrates an example of the state of the art in which two tubular cavities 1, 2 have sharp edges between their ends 3, 4.

[0197] At least one tubular cavity 98 is devoid of bifurcation and / or branching between its ends 102, 104. The left part of [Fig.7] illustrates an example of the state of the art in which each tubular cavity 1, 2 has bifurcations and branchings 5, 6.

[0198] A neutral fiber 100 is defined for each tubular cavity 98.

[0199] The neutral fiber 100 of a tubular cavity 98 corresponds to a line passing through the center of gravity of the straight sections of said tubular cavity 98.

[0200] Advantageously, as illustrated in [Fig.7], the neutral fiber 100 of at least one tubular cavity 98 is curved. Such a curved neutral fiber 100 is notably obtained through the use of additive manufacturing during the process for producing the servo control 18 (detailed later).

[0201] For example, a plurality of tubular cavities 98 have a curved neutral fiber 100.

[0202] In particular, the at least one tubular cavity 98 whose neutral fiber 100 is curved is devoid of a sharp edge between its ends 102, 104 and is devoid of bifurcation and / or stitching between its ends 102, 104.

[0203] In the following, with reference to [Fig.7], a single tubular cavity 98 is described whose neutral fiber 100 is curved. It is of course understood that the following applies to all tubular cavities 98 whose neutral fiber 100 is curved.

[0204] For example, as illustrated in [Fig.7], the curved neutral fiber 100 extends along the shortest path between its two ends 102, 104, the shortest path being restricted by the presence of the other tubular cavities 98, the accessories 70 and the external surface 90. As illustrated in the example of [Fig.7], the shortest path along which the curved neutral fiber 100 extends is restricted by the presence of the accessory 70C.

[0205] Advantageously, the radius of curvature of the curved neutral fiber 100 is continuously derivable.

[0206] With reference to Figures 2 to 5, the connection device 120 comprises at least one connection part 122 between the network 96 of tubular cavities 98 of the control unit 62 and the hydraulic cylinder 32.

[0207] Advantageously, the connection device 120 comprises at least one additional connection part 124 identical to the connection part 122 and connecting the network 96 of tubular cavities 98 of the additional control unit 64 and the additional hydraulic cylinder 34.

[0208] According to the example illustrated in Figures 2 to 5, the connecting device 120 comprises exactly one connecting piece 122 and one additional connecting piece 124.

[0209] In the following, for the sake of brevity, a single connecting piece 122 is described. It is of course understood that the following applies to all of the connecting pieces 122, when the connecting device 120 comprises a plurality of connecting pieces 122 and additional connecting pieces 124.

[0210] Advantageously, as visible in [Fig.5], the connecting device 120 further comprises, for each connecting part 122, two screws 140 and two nuts 142.

[0211] The connecting piece 122 is movable relative to the body 72 of the control unit 62 and / or relative to the hydraulic cylinder 32 to allow differential expansion of the body 72 of the control unit 62 and of the hydraulic cylinder 32 relative to each other.

[0212] According to the example illustrated in Figures 2 to 5, the connecting piece 122 is arranged so as to be movable in translation in the cylindrical connecting cavity 80 of the first connecting portion 76 during the differential expansion of the body 72 of the control unit 62 and the hydraulic cylinder 32 relative to each other.

[0213] In particular, the connecting piece 122 is movable in translation in the cylindrical connecting cavity 80 along the cylinder axis A-A'.

[0214] In particular, as illustrated in Figures 4 to 6, the connecting part 122 comprises a cylindrical portion 128 for connecting to the cylindrical cavity 80 of the first connecting portion 76 of the control unit 62 and a cylindrical portion 130 for connecting to the cylindrical cavity 44 of the first connecting portion 40 of the hydraulic cylinder 32.

[0215] Advantageously, as visible in Figures 5 and 6, the connecting piece 122 further comprises two wings 132 extending laterally on either side of the cylindrical portions 128 and 130, in particular on either side of the plane P.

[0216] The cylindrical connection portion 128 defines a connection conduit 146 and extends into the cylindrical connection cavity 80.

[0217] During the differential expansion of the body 72 of the control unit 62 and the hydraulic cylinder 32 relative to each other, the cylindrical connection portion 128 slides in the cylindrical connection cavity 80.

[0218] The cylindrical connection portion 128 further comprises at least one annular projection 148 extending radially from the connection pipe 146 and cooperating with the internal wall 82 delimiting the cylindrical connection cavity 80, to connect in a sealed manner the network 96 of tubular cavities 98 of the control unit 62 and the hydraulic cylinder 32.

[0219] With reference to Figures 5 and 6, each wing 132 is formed by a plate 134 extending substantially along a plane parallel to the transverse axis T and the vertical axis V.

[0220] Each plate 134 comprises an orifice 136 for the passage of the screw 140.

[0221] As seen in [Fig.5], each screw 140 extends substantially parallel to the longitudinal axis L through the passage orifices 50 of the connecting members 46 of the jack 32, through the passage orifice 86 of the connecting member 84 of the body 72 of the control unit 62 and through the passage orifice 136 of the wings 132 of the connecting piece 122.

[0222] Each screw 140 cooperates with a nut 142 to secure the hydraulic cylinder 32, the connecting piece 122 and the control unit 62 while allowing translation parallel to the longitudinal axis L of the hydraulic cylinder 32 and the control unit 62 relative to each other.

[0223] During the differential expansion of the body 72 of the control unit 62 and the hydraulic cylinder 32 relative to each other, the connecting piece 122 of the connecting device 120 and the connecting members 46, in particular the plates 48, slide together along the screw 140 between the connecting member 84 of the control unit 62, in particular the plate 85, and the head of the screw 140.

[0224] Thus, the control device 60 and the power device 30 can be made of materials of different natures and / or characteristics, by assembling one on the other. The connecting piece 122 guarantees that the differential expansions above likely to occur over the operating temperature range of the aircraft 10 are compensated.

[0225] The screws 140 thus constitute an element allowing the cylinder 32, the control unit 62 and the connecting piece 122 to be secured together and the hydraulic cylinder 32 to be guided in the longitudinal direction L relative to the control unit 62 during differential expansion.

[0226] In the following, with reference to Figures 8 to 10, a method 200 for producing a servocontrol 18 as described above is described.

[0227] The method 200 comprises a first step 210 of forming the hydraulic cylinder 32 of the power device 30, for example by machining at least one block of the first material.

[0228] The method 200 further comprises a second step 220 of producing a blank 71 of the body 72 of the control unit 62 by additive manufacturing, in particular from the second material.

[0229] Advantageously, the blank 71 of the body 72 comprises at least one tubular cavity 98 whose neutral fiber 100 is curved. In particular, the second step 220 is carried out so that at least one tubular cavity 98 has a curved neutral fiber 100. In particular, additive manufacturing makes it possible to obtain such a curved neutral fiber 100.

[0230] Still advantageously, with reference to [Fig.9], the second step 220 does not use additive manufacturing supports. By “additive manufacturing supports” is meant elements dedicated to supporting overhanging parts of the blank 71. In particular, the blank 71 is self-supporting. By “self-supporting” is meant that the blank 71 is devoid of overhanging parts or that it has overhanging parts which do not require particular supports.

[0231] As illustrated in [Fig.9], the blank 71 of the body 72 extends in a main direction D from the rear to the front. The main direction D is parallel to the cylinder axis A-A' when the power device 30 and the control device 60 are assembled.

[0232] Additive manufacturing is carried out along the main direction D from back to front during the second step 220.

[0233] According to the example illustrated in [Fig.9], the blank 71 of the body 72 has at least one cantilevered portion 160. By “cantilevered”, it is meant that the portion 160 does not have any immediate support below it, that is to say behind it in the main direction D.

[0234] According to the example illustrated in [Fig.9], any surface of the at least one portion 160 oriented substantially rearwardly in the main direction D has an angle α with the main direction D less than or equal to 45°. Such an angle makes it possible in particular to free itself from additive manufacturing supports.

[0235] A cantilevered portion 160 is indicated in the example of [Fig.9]. This cantilevered portion corresponds to the upper part (forward in the main direction D) of an orifice blank 161. This upper part is a cantilevered portion since it has no immediate support underneath. The upper surface of the orifice blank 161, which is oriented substantially rearward in the main direction D, has an angle α with the main direction D, as illustrated.

[0236] Again with reference to [Fig.8], the method 200 further comprises a third step 230 of producing the body 72 of the control unit 62 by machining the blank 71.

[0237] According to the example illustrated in [Fig. 10], the surfaces of the at least one portion 160 oriented substantially towards the rear are machined to give them their final shape.

[0238] [Fig. 10] illustrates an example consistent with that of [Fig. 9], in which the orifice blank 161 of [Fig. 9] has been machined to give it its final shape, i.e. the final orifice shape 162.

[0239] Again with reference to [Fig.8], the method 200 further comprises a fourth step 240 of forming the control unit 62 of the control device 60 by installing the electronic, mechanical and / or hydraulic accessories 70 in the body 72.

[0240] The method 200 further comprises a fifth step 250 of assembling the power device 30 and the control device 60 to form the servo control 18.

[0241] Advantageously, the fifth step 250 comprises the arrangement of at least one connection device 120 between the power device 30 and the control device 60.

[0242] In particular, the arrangement of the at least one connection device 120 between the power device 30 and the control device 60 comprises the arrangement of a connection part 122 between the network 96 of tubular cavities 98 and the hydraulic cylinder 32.

[0243] In the following, with reference to [Fig. 11], a series 180 of servocontrols 18A, 18B, 18C, according to the invention, is described.

[0244] The servo drives 18A, 18B, 18C of the 180 series of servo drives are as described above.

[0245] Each servocontrol 18 of the series 180 of servocontrols 18A, 18B, 18C is intended for controlling the position of a mobile element 12 of the aircraft 10.

[0246] Each servo control 18 of the series 180 of servo controls 18A, 18B, 18C comprises a power device 30 and a control device 60 capable of being assembled to form, in an assembled configuration, said servo control 18.

[0247] Advantageously, the series 180 of servocontrols 18A, 18B, 18C comprises a first servocontrol 18A and a second servocontrol 18B separate from the first servocontrol 18A.

[0248] Still advantageously, the series 180 of servocontrols 18A, 18B, 18C comprises a third servocontrol 18C distinct from the first servocontrol 18A.

[0249] According to the example of [Fig.l 1], the third servo control 18C is also distinct from the second servo control 18B.

[0250] For example, the first servo control 18A is intended for controlling the position of a first mobile element 12, the second servo control 18B is intended for controlling the position of a second mobile element 12 distinct from the first mobile element 12 and the third servo control 18C is intended for controlling the position of a third mobile element 12 distinct from the first and second mobile elements 12.

[0251] Advantageously, the power device 30X of the second servo control 18B is identical to the power device 30X of the first servo control 18A and the control device 60Y of the second servo control 18B is different from the control device 60X of the first servo control 18A.

[0252] In particular, the control unit 62U of the first servo control 18A is distinct from the control unit 62V of the second servo control 18B.

[0253] In particular, the body 72 of the control unit 62U of the first servo control 18A is identical to the body 72 of the control unit 62V of the second servo control 18B and the set 68U of electronic, mechanical and / or hydraulic accessories 70 of the control unit 62U of the first servo control 18A is distinct from the set 68V of electronic, mechanical and / or hydraulic accessories 70 of the control unit 62V of the second servo control 18B.

[0254] In other words, the first 18A and second 18B servocontrols are distinguished by the set 68 of electronic, mechanical and / or hydraulic accessories 70 but comprise identical bodies 72, and therefore networks 96 of identical tubular cavities 98.

[0255] For example, the power device 30Y of the third servo control 18C is different from the power device 30X of the first servo control 18A and the driving device 60X of the third servo control 18C is identical to the driving device 60X of the first servo control 18A.

[0256] In particular, the power device 30X of the first servo control 18A has at least one differentiating characteristic compared to the power device 30Y of the third servo control 18C.

[0257] Advantageously, the at least one differentiating characteristic is taken from the list of the following differentiating characteristics:

[0258] - the diameter of the hydraulic cylinder 32;

[0259] - the stroke of the hydraulic cylinder 32; and

[0260] - the center distance EA.

[0261] In particular, the diameter of the hydraulic cylinder 32 corresponds to the diameter of the cylinder 38.

[0262] In the following, with reference to [Fig. 12], a method 300 for producing a series 180 of servocontrols 18A, 18B, 18C as described above is described.

[0263] The method 300 comprises a first step 310 of providing a plurality of distinct power devices 30X, 30Y.

[0264] The method 300 further comprises a second step 320 of providing a plurality of separate control devices 60X, 60Y.

[0265] Advantageously, with reference to [Fig. 12], the second step 320 comprises a first sub-step 321 of providing a plurality of bodies 72 of identical control units 62.

[0266] The second step 320 further comprises a second sub-step 322 of providing a plurality of first sets 68U of electronic, mechanical and / or hydraulic accessories 70 and a plurality of second sets 68V of electronic, mechanical and / or hydraulic accessories 70. The first sets 68U are distinct from the second sets 68V.

[0267] The second step 320 further comprises a third sub-step 323 of forming a first control unit 62U by installing a first set 68U of electronic, mechanical and / or hydraulic accessories 70 in a body 72 of control unit 62 and without installing a second set 68V of electronic, mechanical and / or hydraulic accessories 70.

[0268] The second step 320 further comprises a fourth step 324 of forming a second control unit 62V by installing a second set 68V of electronic, mechanical and / or hydraulic accessories 70 in a body 72 of control unit 62, for example without installing a first set 68U of electronic, mechanical and / or hydraulic accessories 70.

[0269] Still with reference to [Fig. 12], the method 300 further comprises a third step 330 of assembling a first combination of a power device 30 from among the plurality of distinct power devices 30X, 30Y, 30Z and a control device 60 from among the plurality of distinct control devices 60X, 60Y, 60Z to form a first servo control 18A.

[0270] The method 300 further comprises a fourth step 340 of assembling a second combination of a power device 30 from among the plurality of distinct power devices 30X, 30Y, 30Z and a control device 60 from among the plurality of separate control devices 60X, 60Y, 60Z to form a second servo control 18B. The second combination is separate from the first combination.

[0271] According to another embodiment, the first material is a steel, in particular a stainless steel or a titanium alloy.

[0272] According to yet another embodiment, the second material is a steel, in particular a stainless steel, an inconel™ or an aluminum alloy.

[0273] According to yet another embodiment, the device 16 for generating the movement command of the mobile element 12 is a mechanical linkage.

[0274] Thanks to the invention, the servo control 18 offers improved adaptability and modularity depending on the mobile element 12 to be controlled by the use of two distinct materials respectively for the hydraulic cylinder 32 and for the control unit 62.

[0275] The servo control 18 allows weight savings and manufacturing cycle savings (time savings).

[0276] The use of additive manufacturing for the production of the body 72 of the control unit 62, and in particular the fact that the body 72 has at least one tubular cavity 98 whose neutral fiber 100 is curved, makes it possible to make the network 96 of tubular cavities 98 more compact, and therefore to reduce the mass and size of the body 72.

[0277] The fact that the body 72 comprises a shaped portion, also obtained through the use of additive manufacturing, further reduces the mass and bulk of the body 72.

[0278] The use of an aluminum alloy for the hydraulic cylinder 32 and a titanium alloy for the control unit 62 makes it possible to obtain a particularly satisfactory compromise between lightness and reliability (mechanical resistance in particular).

[0279] Thanks to the connecting device 120, in particular thanks to the connecting part 122, the differential expansion of the body 72 of the control unit 62 and of the hydraulic cylinder 32 relative to each other is permitted, which reduces the stresses undergone by the servocontrol 18 and therefore extends its service life.

[0280] Finally, the invention makes it possible to easily produce a multitude of servocontrols 18 depending on the various mobile elements 12 to be controlled. The servocontrols of the 180 series according to the invention are distinguished by their power device and / or by their control device.

[0281] The fact of using a single identical body 72 for each servo control 18 of the 180 series facilitates the production of the series.

Claims

Claims

1. Servo control (18) intended for controlling the position of a mobile element (12) of an aircraft (10), comprising: - a power device (30) configured to move the mobile element (12), the power device (30) comprising at least one hydraulic cylinder (32) extending along a cylinder axis (A-A'); and - a piloting device (60) configured to control the power device (30) as a function of a command to move the mobile element (12) received from a device (16) for generating the command to move the mobile element (12), the piloting device (60) comprising at least one piloting unit (62) comprising: + a set (68) of electronic, mechanical and / or hydraulic accessories (70) in fluid communication with the hydraulic cylinder (32);and + a body (72) delimiting a network (96) of tubular cavities (98) fluidly connecting the electronic, mechanical and / or hydraulic accessories (70) as well as the hydraulic cylinder (32), a neutral fiber (100) being defined for each tubular cavity (98); characterized in that at least a part of the at least one hydraulic cylinder (32) is made of a first material, the body (72) of the at least one control unit (62) being made of a second material distinct from the first material.;

2. Servo control (18) according to claim 1, in which the neutral fiber (100) of at least one tubular cavity (98) is curved.

3. Servo control (18) according to claim 1 or 2, wherein the body (72) of the at least one control unit (62) is produced by additive manufacturing.

4. A servo control (18) according to any preceding claim, wherein the first material is an aluminum alloy, the second material being a titanium alloy.

5. Servo control (18) according to any one of the preceding claims, further comprising a connection device (120) between the power device (30) and the control device (60), the connection device (120) comprising at least one connection piece (122) between the network (96) of tubular cavities (98) and the hydraulic cylinder (32), the at least one connection piece (122) being movable relative to the body (72). of the control unit (62) and / or relative to the hydraulic cylinder (32) to allow differential expansion of the body (72) of the control unit (62) and of the hydraulic cylinder (32) relative to each other.

6. Servo control (18) according to claim 5, in which the hydraulic cylinder (32) comprises a cylinder (38) extending along the cylinder axis (A-A') and delimiting a chamber (39), a rod (54) extending along the cylinder axis (A-A') in the chamber (39) and a piston (56) mounted on the rod (54) in the chamber (39), at least one between the cylinder (38) of the hydraulic cylinder (32) and the body (72) of the control unit (62) comprising a cylindrical connection cavity (44; 80) in fluid communication with respectively the network (96) of tubular cavities (98) or the chamber (39) of the hydraulic cylinder (32), the at least one connection part (122) being arranged so as to be movable in translation in the cylindrical cavity connection (44; 80) during differential expansion of the body (72) of the control unit (62) and the hydraulic cylinder (32) relative to each other.

7. Servo control (18) according to claim 6, in which the cylindrical connection cavity (44; 80) extends along an axis (C-C') substantially parallel to the cylinder axis (A-A'), the at least one connection part (122) being movable in translation in the cylindrical connection cavity (44; 80) along the cylinder axis (A-A').

8. Servo control (18) according to claim 6 or 7, in which the cylindrical connection cavity (44; 80) is delimited by an internal wall (82), the at least one connection part (122) comprising a cylindrical portion (128) delimiting a connection pipe (146) and extending into the cylindrical connection cavity (44; 80), and at least one annular projection (148) cooperating with the internal wall (82) of the cylindrical connection cavity (44; 80) to tightly connect the network (96) of tubular cavities (98) of the control unit (62) and the hydraulic cylinder (32).

9. Servo control (18) according to any one of the preceding claims, in which: - the power device (30) comprises at least one additional hydraulic cylinder (34) identical to the hydraulic cylinder (32) and extending along an additional cylinder axis (B-B') substantially parallel to the cylinder axis (A-A'); and - the control device (60) comprises at least one additional control unit (64) identical to the control unit (62), the at least one additional control unit (64) being associated with the at least one additional hydraulic cylinder (34).

10. Architecture (14) for controlling the position of a mobile element (12) of an aircraft (10), comprising: - a device (16) for generating a command to move the mobile element (12) configured to generate a command to move the mobile element (12); and - a servocontrol (18) according to any one of the preceding claims, intended for controlling the position of the mobile element (12), as a function of the command to move the mobile element (12).

11. Method (200) for producing a servo control (18) according to any one of claims 1 to 9, comprising the following steps: - forming (210) at least one hydraulic cylinder (32) of the power device (30) by machining at least one block of the first material; - producing (220) a blank (71) of the body (72) of the at least one control unit (62) by additive manufacturing from the second material; - producing (230) the body (72) of the at least one control unit (62) by machining the blank (71); - forming (240) the at least one control unit (62) of the control device (60) by installing the electronic, mechanical and / or hydraulic accessories (70) in the body (72); - assembly (250) of the power device (30) and the control device (60) to form the servo control (18).

12. The method (200) of claim 11, wherein the body blank comprises at least one tubular cavity whose neutral fiber is curved.

13. The method (200) of claim 11 or 12, wherein the assembling step (250) comprises arranging at least one connecting device (120) between the power device (30) and the control device (60), the arrangement of the at least one connecting device (120) comprising arranging a connecting piece (122) between the network (96) of tubular cavities (98) and the hydraulic cylinder (32), the at least one connecting piece (122) being movable relative to the body (72) of the control unit (62) and / or relative to the hydraulic cylinder (32) to allow differential expansion of the body (72) of the control unit (62) and the hydraulic cylinder (32) relative to each other.

14. A series (180) of servocontrols (18) according to any one of claims 1 to 9, wherein each servocontrol (18) is intended for controlling the position of a movable element (12) of the aircraft (10), each servocontrol (18) comprising a power device (30) and a piloting device (60), said piloting device (60) and said power device (30) being capable of being assembled to form, in an assembled configuration, said servocontrol (18), the series (180) comprising a first servocontrol (18A) and a second servocontrol (18B) distinct from the first servocontrol (18A), the power device (30X) of the second servocontrol (18B) being identical to the power device (30X) of the first servocontrol (18A), the piloting device (60Y) of the second servocontrol (18B) being different from the power device (30X) of the first servocontrol (18A), the piloting device (60Y) of the second servocontrol (18B) being different from the power device (30X) of the first servocontrol (18A), the piloting device (60Y) of the second servocontrol (18B) being different from the power device (30X) of the first servocontrol (18A). control (60X) of the first servo control (18A),or / and the series (180) comprising a third servo control (18C) distinct from the first servo control (18A), the power device (30Y) of the third servo control (18C) being different from the power device (30X) of the first servo control (18A), the control device (60X) of the third servo control (18C) being identical to the control device (60X) of the first servo control (18A).,

15. Series (180) of servocontrols (18), according to claim 14, in which the hydraulic cylinder (32) of each power device (30) comprises a first ball joint (57) fixed in translation along the cylinder axis (A-A') and a second ball joint (58) intended to be integral with the mobile element (12) and mobile in translation along the cylinder axis (A-A'), the first ball joint (57) being mobile in rotation about a first axis of rotation (RI) substantially orthogonal to the cylinder axis (A-A'), the second ball joint (58) being mobile in rotation about a second axis of rotation (R2) substantially orthogonal to the cylinder axis (A-A'), the first (RI) and second (R2) axes of rotation being separated along the cylinder axis (A-A') by a center distance (EA), the power device (30X) of the first servo control (18A) having at least one differentiating characteristic compared to the power device (30Y) of the third servo control (18C),the at least one differentiating characteristic being taken from the following list of differentiating characteristics:, - the diameter of the hydraulic cylinder (32); and / or - the stroke of the hydraulic cylinder (32); - the center distance (EA).

16. Series (180) of servocontrols (18) according to claim 15, in which the body (72) of the control unit (62U) of the first servocontrol (18A) is identical to the body (72) of the control unit (62V) of the second servocontrol (18B), the set (68U) of electronic, mechanical and / or hydraulic accessories (70) of the control unit (62U) of the first servocontrol (18A) being distinct from the set (68V) of electronic, mechanical and / or hydraulic accessories (70) of the control unit (62V) of the second servocontrol (18B).

17. A method (300) of producing a series (180) of servo drives (18) according to any one of claims 14 to 16, the method (300) comprising the following steps: - providing (310) a plurality of separate power devices (30X, 30Y); - providing (320) a plurality of separate control devices (60X, 60Y); - assembling (330) a first combination of a power device (30X) from among the plurality of separate power devices (30X, 30Y) and a control device (60X) from among the plurality of separate control devices (60X, 60Y) to form a first servo drive (18A);- assembling (340) a second combination of a power device (30X) from among the plurality of distinct power devices (30X, 30Y) and a pilot device (60Y) from among the plurality of distinct pilot devices (60X, 60Y) to form a second servo control (18B), the second combination being distinct from the first combination.;

18. The method (300) of claim 17, wherein the step (320) of providing a plurality of separate control devices (60X, 60Y) comprises the following substeps: - providing (321) a plurality of bodies (72) of control units (62), the bodies (72) being identical; - providing (322) a plurality of first sets (68U) of electronic, mechanical and / or hydraulic accessories (70) and a plurality of second sets (68V) of electronic, mechanical and / or hydraulic accessories (70), the first sets (68U) being distinct from the second sets (68V); - formation (323) of a first control unit (62U) by installing a first set (68U) of electronic, mechanical and / or hydraulic accessories (70) in a body (72) of control unit (62U) and without installing a second set (68V) of electronic, mechanical and / or hydraulic accessories (70); - formation (324) of a second control unit (62V) by installing a second set (68V) of electronic, mechanical and / or hydraulic accessories (70) in a body (72) of the control unit (62V).

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