Distributed braking architecture with improved safety

Abstract

A wheel braking system architecture for an aircraft (1000) comprises a friction brake (20); an electromechanical actuator (30) associated with a power module (33) connected to a digital communication module (34) by a first driver module (35); and a controller (50) comprising a supply unit (51) for supplying power to the power module (33) by delivering a supply voltage (Vc) thereto, and a control unit (52) connected to the digital communication unit so as to transmit a digital control signal to the digital communication module (34). The control unit (52) is also connected to the driver unit (35) by an analog wired connection (60) so as to transmit a first analog braking command thereto, the first driver module (33) driving the power module (33) according to the first analog braking command to generate a degraded supply current for the actuator.

Description

[0001] The present invention relates to the field of braking system architectures for aircraft, and more particularly to so-called "distributed" braking system architectures. BACKGROUND

[0003] Known braking system architectures for aircraft comprise brakes for braking respective wheels of the aircraft. Such brakes comprise a friction member and at least one electromechanical actuator for applying a braking force to the friction member in order to apply a braking torque on the wheel. In centralized braking system architectures, the electromechanical brake actuators are connected to a centralized computing device via power lines, the centralized computing device comprising means for generating an electric current to power the electric actuators. Conventionally, the centralized computing device receives status information from the brakes and / or from the electromechanical actuators in order to implement a servo-control loop and adjust the magnitude of the electric current. Such braking system architectures require a considerable number of wired connections, which connect the actuators and each status sensor to the centralized computing device. For an aircraft equipped with a plurality of electromechanical brake actuators, it is necessary to establish a respective specific power line between the computing device and each electromechanical actuator. These wired connections represent a considerable weight. Patent application FR3044296 describes a braking system architecture for an aircraft comprising a brake and an electromechanical actuator for applying a braking force to the brake. The electromechanical actuator comprises an electric machine, a power module for generating a supply electric current for the electric machine, and a digital communication module. The braking architecture further comprises a controller having a supply unit for powering the power module by supplying a supply voltage to the power module, and a control unit connected to the digital communication unit for producing digital control signals for controlling the electric machine and for transmitting them to the first digital communication module. In operation, the digital communication module transmits the digital control signals to the power module so that the power module generates and draws the supply electric current from the supply voltage based on the digital control signals. The control unit is connected to a digital communication network of the aircraft and the supply unit is connected to an electrical distribution network of the aircraft. Such an architecture relies on a communication infrastructure of digital control signals, which infrastructure specifically comprises a communication network, a network management protocol, a protocol for communication within the network, one or more routers and one or more digital communication modules. If a fault in the communication infrastructure affects a common element such as one of the network or the protocol, then the fault can result in a total loss of braking capability of the aircraft.

[0004] OBJECTS

[0005] It is a particular object of the present invention to improve the reliability of distributed architectures of electric braking systems. SUMMARY

[0006] To this end, the invention provides an architecture for an aircraft wheel braking system, the architecture comprising a friction brake; a first electromechanical actuator having a first electric motor and a first power module connected to a first digital communication module through a first driver module; a controller comprising a power supply unit arranged for delivering a supply voltage (Vc) to the first power module and a control unit comprising a digital communication unit for transmitting digital control signals to the first digital communication module. The first power module is arranged to receive the digital control signals and transmit them to the first driver module in order to drive the first power module so that it generates and draws a first nominal supply current from the supply voltage based on the digital control signals. A first wired connection of analog type connects the control unit and the first driver module together. The control unit is arranged to send first analog braking instructions to the first driver module by means of the first wired connection and the first driver module is arranged to drive the first power module to generate and draw a first degraded supply current from the supply voltage based on the first analog braking instructions, thereby causing the wheel to be braked.

[0007] A distributed braking architecture is thus obtained, which comprises connections other than digital connections and is thereby insensitive to problems that can affect digital connections.

[0008] When the brake comprises a second electromechanical actuator, the braking is more evenly distributed in order to apply a braking force on the friction member and thereby a braking torque on the wheel. The second electromechanical actuator comprises a second electric motor; a second power module for generating a second supply current for the second electric motor and drawn from the supply voltage delivered by the power supply unit; the second power module being connected to a second digital communication module through a second driver module, the second digital communication module being arranged to receive digital control signals and transmit them to the second driver module in order to drive the second power module in such a way that it generates and draws a second nominal supply current from the supply voltage based on the digital control signals.

[0009] Advantageously, the first and second digital communication modules are connected to each other to form a digital network.

[0010] Preferably, the control unit is connected to the second driver module through a second wired connection of analog type and is arranged to send second analog braking instructions to the second driver module by means of the second wired connection. The second driver module is arranged to drive the second power module in order to generate and draw a second degraded supply current from the supply voltage based on the second analog braking instructions, thereby causing the wheel to be braked.

[0011] Advantageously, the first wired connection and / or the second wired connection is a unidirectional connection.

[0012] When the braking architecture comprises first estimator means for estimating a first braking power generated by the first electromechanical actuator, it is possible to regulate the braking.

[0013] Advantageously, the first estimator means comprise a first current sensor for measuring a current consumed by the first electric machine and / or a first movement sensor for sensing a movement of a first movable member of the first electric machine.

[0014] In case of failure of the digital communication unit or digital module, when the first driver module is arranged to control the generation of the first degraded current according to the information delivered by the first estimator means, it is possible to continue to regulate the braking.

[0015] The invention also provides a braking method performed by a controller within such an architecture and comprising the following steps:

[0016] • transmitting a braking setpoint to the control unit, and subsequently:

[0017] In nominal mode:

[0018] • generating a digital control signal from the braking setpoint;

[0019] • transmitting the digital control signal to the first driver module by means of the digital communication unit;

[0020] • using the first driver module and the digital control signal to generate a first command for the first power module;

[0021] • using the first power module to generate and draw a first nominal supply current from the supply voltage based on the first command;

[0022] • transmitting a first braking power signal to the controller using the first digital communication module, the first braking power signal representing a first braking power generated by the first electromechanical actuator;

[0023] • causing the control unit to generate an adjusted digital control signal based on the first braking power signal and the first nominal value;

[0024] • transmitting the adjusted digital control signal by means of the digital communication unit; and

[0025] • using the first driver module to generate and draw the first nominal supply current from the supply voltage based on the adjusted digital control signal; and

[0026] • and in degraded mode:

[0027] • using the control unit to convert the braking setpoint into a degraded analog braking instruction;

[0028] • using the first wired connection to deliver a degraded analog braking command to the first driver module;

[0029] • using the first driver module and the degraded analog braking command to generate a first degraded command for the first power module; and

[0030] • using the first power module to generate and draw a first degraded supply current from the supply voltage based on the first degraded command.

[0031] Advantageously, the first actuator comprises first estimator means for estimating a first braking power generated by the first electromechanical actuator, and the first driver module is arranged to control the generation of the first degraded current as a function of information delivered by the first estimation machine means, the method comprising the following additional steps:

[0032] in degraded mode:

[0033] • using the first driver unit to define an adjusted value of the degraded braking current as a function of the information delivered by the first estimator means and the degraded analog braking command; and

[0034] • using the first power module to generate a first degraded braking current adjusted to this adjusted value and drawn from the supply voltage.

[0035] The application also provides an aircraft provided with a braking architecture as described above.

[0036] Other characteristics and advantages of the application appear on reading the following description of particular, non-limiting embodiments of the application.

[0037] BRIEF DESCRIPTION OF DRAWINGS

[0038] With reference to the appended drawings, in which:

[0039] • FIG. 1 is a diagrammatic view of an aircraft of the application;

[0040] • FIG. 2 is a block diagram of a braking architecture in a first embodiment of the application;

[0041] • FIG. 3 is a block diagram of a braking architecture in a second embodiment of the application; and

[0042] • FIG. 4 is a block diagram of a braking architecture in a third embodiment of the application.

[0043] DETAILED DESCRIPTION

[0044] The invention will be described below as implemented in an aircraft having a plurality of main landing gears 100, 200 and 300, each main landing gear carrying a plurality of so-called "braking" wheels, i.e. a plurality of wheels each equipped with a respective brake for braking the aircraft 100. The present description relates to a single braking wheel, but the invention naturally applies in the same way to all or some of the braking wheels of the aircraft.

[0045] With reference to FIG. 2 The braking system architecture in the first embodiment of the invention comprises a brake 20 for braking one of the wheels 100 of the aircraft. The brake 20 has a first electromechanical actuator 30 and a friction member, in particular a carbon disc stack 40 fixed to the wheel 10. The electromechanical actuator 30 is used to exert a pressure on the carbon disc stack 40 and thereby exert a braking torque on the wheel 10. The first electromechanical actuator 30 comprises a first body 31 fastened to the main landing gear 100 and which, in this embodiment, incorporates a first three-phase electric motor 32, a first power module 33 and a first digital communication module 34. The first power module 33 and the first digital communication module 34 are connected together by a first driver module 35. A first pusher 41 is actuated by the first electric motor 32 to slide and exert a pressure against the carbon disc stack 40.

[0046] The braking system architecture of the invention also comprises a controller 50 comprising a control unit 52 and a power supply unit 51 connected to the first power module 33. The control unit 52 comprises a processor unit 53 and a digital communication unit 54 connected to the first digital communication module 34.

[0047] The control unit 52 is connected to a digital communication network 1001 of the aircraft 1000 and the power supply unit 51 is connected to an electrical distribution network 1002 of the aircraft 1000, in particular a network delivering a direct current (DC) voltage.

[0048] The power supply unit 51 supplies power to the first power module 33 by supplying it with a DC supply voltage Vc. The first power module 33 is arranged to generate, each time it is appropriate to actuate the first pusher 41 and thus brake the wheel 10, an alternating current (AC) power flowing through the three phases of the first electric motor 32. To this end, the first power module 33 comprises a first inverter 36 comprising a plurality of first switches 37 controlled by the first driver module 35 in order to convert the DC supply voltage into a three-phase AC voltage under which the first supply current of the first electric motor 32 is generated.

[0049] The first driver module 35 comprises an electronic circuit connected to the first power module 33 and arranged to control the first switches 37 of the first inverter 36 according to instructions from the first digital communication module 34.

[0050] As FIG. 2 can be seen, a first wired connection 60 of analog type connects the control unit 52 and the first driver module 35 together. In this example, the first wired connection 60 is a simple two-conductor copper cable that transmits an analog signal (in particular, a voltage) from the processor unit 53 to the first driver module 35 unidirectionally. The first driver unit 35 converts the received analog signal into a specific configuration of the first switches 37 of the first inverter 36. Thereby, a voltage is applied across the terminals of the first wired connection 60 for controlling a discrete change of state of the first switches 37.

[0051] In operation, when the pilot of the aircraft 1000 acts on the brake control, a brake setpoint Cf is generated, which is transmitted by the digital communication network 1001 to the controller 50. In the nominal mode of operation, the processor unit 53 uses the brake setpoint Cf to generate a digital control signal Sc for controlling the first electric machine 32. The digital control signal Sc is transmitted by the digital communication unit 54 to the first digital communication module 34. The first digital communication module 34 transmits the digital control signal Sc to the first driver module 35, which establishes a first command for the first power module 33, in particular in the form of a first configuration of the first switches 37 of the first inverter 36 of the first power module 33, and then generates and draws a first nominal supply current Isupfrom the supply voltage Vc based on the digital control signal Sc. n1 Under the action of the first nominal supply current Isupapplied to the first electric machine 32, the first push rod 41 presses against the disc stack 40, thereby exerting a nominal brake torque on the wheel 10. n1

[0052] In case of failure of the communication infrastructure, for example such as a hardware failure affecting the communication network (router, digital communication unit 54, first digital communication module 34) or such as a software failure affecting the network management protocol or the communication protocol, the known device for monitoring the operation informs the controller 50, which then switches to a degraded mode for controlling the brake.

[0053] In this degraded mode, the processor unit 53 converts the brake setpoint Cf into a first analog brake instruction O af1 , in particular a voltage for application to the terminals of the wired connection 60.

[0054] The processor unit 53 transmits the first analog brake instruction O af1 to the first driver module 35 via the first wired connection 60. The first driver module 35 converts the first analog brake instruction O af1 ​into a form of a first degraded command for the first power module 33, in particular a configuration of the first switches 37 of the first inverter 36. The first driver module transmits the first degraded command to the first power module 33, which then generates a first degraded supply current I d1 . Under the action of the first degraded supply current I d1 applied to the first electric machine 32, the first push rod 41 presses against the disc stack 40, thereby exerting a degraded braking torque on the wheel 10.

[0055] In a second embodiment as shown in FIG. 3 , the first power module 33 of the first electromechanical actuator 30 comprises a first current sensor 55 for sensing the current consumed by the first electric machine 32 and a first movement sensor 38 for sensing the movement of the first push rod 41, these sensors being connected to the first driver module 35. The first current sensor 55 and the first movement sensor 38 for sensing the movement of the first push rod 41 are also connected to the first digital communication module 34.

[0056] In the second embodiment, in the normal mode, the first digital communication module 34 transmits to the controller 50 a first braking power signal from the first movement sensor 38 for sensing the movement of the first push rod 41 and a second braking power signal from the first current sensor 55. The processor unit 53 uses the first braking power signal provided by the first movement sensor 38 for sensing the movement of the first push rod 41, the second braking power signal provided by the first current sensor 55 and the first nominal value of the first nominal supply current I n1 to generate a first adjusted digital control signal Sca. The digital communication unit 54 transmits the first adjusted nominal digital control signal Sca to the first digital communication module 34. The first digital communication module 34 transmits the adjusted digital control signal Sca to the first driver module 35, which establishes a configuration of the first switches 37 of the first inverter 36 of the first power module 33. The first power module 33 then generates and draws from the supply voltage Vc a first adjusted nominal supply current I n1a . Under the action of the first adjusted nominal supply current I n1a applied to the first electric machine 32, the first push rod 41 presses against the disc stack 40, thereby exerting an adjusted nominal braking torque on the wheel 10. The value of the first adjusted nominal supply current I nla is constantly updated, thereby servo-controlling the first adjusted nominal supply current I nla according to the movement of the push rod 41 and the current consumed by the electric machine 32.

[0057] In the second embodiment, in degraded mode, the first driver unit 35 defines a new first adjusted value of the first adjusted degraded supply current I af1 from the first braking power signal provided by the first movement sensor 38 for sensing the movement of the first push rod 41, from the second braking power signal provided by the first current measurement sensor 55, and from the first degraded analog braking command O d1a , in order to establish the configuration of the first switches 37 of the first inverter 36 of the first power module 33. The first power module 33 then generates a first adjusted degraded supply current I d1a equal in magnitude to the new first adjusted value of the first adjusted degraded supply current I d1a Under the action of the first adjusted degraded supply current I

[0058] This (nominal and degraded) servo-control loop is implemented for all braking operations.

[0059] In a third embodiment as illustrated in FIG. 4 , the brake 20 comprises a second electromechanical actuator 70 for applying pressure on the carbon disc stack 40. The second electromechanical actuator 70 comprises a second body 71 fixed to the landing gear 100 and which comprises a second electric motor 72, a second power module 73 and a second digital communication module 74. The second power module 73 and the second digital communication module 74 are connected together through a second driver module 75. A second push rod 42 is actuated by the second electric motor 72 to slide and press against the carbon disc stack 40. The second power module 73 is connected to the supply unit 51. The first digital communication module 34 and the second digital communication module 74 are connected to the digital communication unit 54 via the network switch 56, so as to form a digital network 78. At this point, it should be noted that it is entirely possible to use other network interconnection means, such as a router or a concentrator (or "hub"), instead of a network switch.

[0060] The supply unit 51 supplies power to the second power module 73 by supplying it with a DC supply voltage Vc. The second power module 73 is arranged to generate, whenever appropriate to actuate the second push rod 42 and thus brake the wheel 10, an AC power that flows through the three phases of the second electric motor 72. To this end, the second power module 73 comprises a second inverter 76 comprising a plurality of second switches 77 controlled by the second driver module 75 so as to convert the DC supply voltage into a three-phase AC voltage under which the second supply current of the second electric motor 72 is generated.

[0061] The second driver module 75 includes electronic circuitry connected to the second power module 73 and arranged to control the second switch 77 of the second inverter 76 according to instructions from the second digital communication module 74.

[0062] like FIG. 4 DETAILED DESCRIPTION FIG. 2 FIG. 2 FIG. 3 FIG. 4 FIG. 4 DETAILED DESCRIPTION FIG. 2 As can be seen, the analog-type second wired connection 80 connects the control unit 52 and the second driver module 75 together. In this example, the second wired connection 80 is a simple two-conductor copper cable that unidirectionally transmits analog signals (specifically, voltages) from the processor unit 53 to the second driver module 75. Thus, a voltage is applied across the terminals of the second wired connection 80 to control discrete changes in the state of the second switch 77.

[0063] During operation, when the pilot of the aircraft acts on the braking control instruments, a braking setpoint Cf is generated, which is transmitted to the controller 50 via the digital communication network 1001. In nominal operating mode, the processor unit 53 uses the braking setpoint Cf to generate digital control signals Sc for controlling the first motor 32 and the second motor 72. The digital control signals Sc are transmitted by the digital communication module 54 to the network switch 56, which delivers the digital control signals Sc to the first digital communication module 34 and the second digital communication module 74 via the network 78. The first digital communication module 34 and the second digital communication module 74 transmit the digital control signals Sc to the first driver module 35 and the second driver module 75, respectively. The first driver module 35 and the second driver module 75 are used to establish the configuration of the first switch 37 of the first inverter 36 of the first power module 33 and the second configuration of the second switch 77 of the second inverter 76, respectively, and then generate and obtain the first nominal supply current I based on the digital control signals Sc and from the supply voltage Vc. n1 Second nominal supply current I n2 The first nominal supply current I applied to the first motor 32 n1 and the second nominal supply current I applied to the second motor 72 n2 Under the action, both the first push rod 41 and the second push rod 42 press against the disc stack 40, thereby applying the nominal braking torque to the wheel 10.

[0064] In the degraded braking mode, processor unit 53 converts the braking setpoint Cf into the first analog braking command O. af1 Second analog braking command O af2 In the first and second braking commands O af1 and O af2 Under the same conditions, the same voltage is applied to the terminals of the first wired connection 60 and the second wired connection 80.

[0065] Processor unit 53 transmits the first analog braking command O via the first wired connection 60af1 to the first driver module 35 and to the second analog braking command O af2 to the second driver module 75. The first driver module 35 establishes the configuration of the first switches 37 of the first inverter 36 of the first power module 33 and then generates a first degraded supply current I d1 . The second driver module 75 establishes the configuration of the second switches 77 of the second inverter 76 of the second power module 73 and then generates a second degraded supply current I d2 Under the action of the first degraded supply current I d1 and of the second degraded supply current I d2 applied to the first motor 32 and to the second motor 72, the first push rod 41 and the second push rod 42 are both pressed against the disc stack 40, thereby exerting a degraded braking torque on the wheel 10.

[0066] Naturally, the present application is not limited to the described embodiments, but covers any variants falling within the scope of the present application as defined by the claims.

[0067] In particular:

[0068] • Although the above motors are three-phase motors, the present application is equally applicable to other types of motors, for example such as single-phase motors;

[0069] • Although the above wired connections comprise two-conductor copper cables, the present application is equally applicable to other ways of arranging the wired connections, for example such as cables with a single conductor or with more than two conductors;

[0070] • Although the above braking setpoints are transmitted to the controller via the digital communication network of the aircraft, the present application is equally applicable to transmitting the braking setpoints by other means, for example such as a single analog connection, a chain of analog connections, a hybrid transmission technique, by radio, a mechanical cable or a hydraulic control transmission;

[0071] • Although the above wired connections are unidirectional, the connections can be bidirectional;

[0072] • Although the above architecture comprises current sensors and movement sensors for sensing the movement of the push rods, the present application is equally applicable to other power estimator means for estimating the first braking power, for example such as temperature sensors for sensing the temperature of the disc stack, a tachometer connected to the wheel, a braking torque sensor or an aircraft speed sensor;

[0073] • The power estimator means are optional;

[0074] • Although the first and second digital communication modules are interconnected to form a digital network, the application is equally applicable to other types of connection between the first and second digital communication modules, such as a point-to-point connection for example;

[0075] • Although the digital control signal comprises the same instructions for the first and second actuators, the application is equally applicable to a digital signal comprising respective different instructions for each actuator.

Claims

1. A wheel braking system architecture for an aircraft (1000), the architecture comprising a friction brake (20); a first electromechanical actuator (30) comprising a first body (31) including a first motor (32) and a first power module (33) connected to a first digital communication module (34) via a first driver module (35); the architecture further comprising a controller (50) including a power supply unit (51) arranged to supply a supply voltage (Vc) to the first power module (33) and a control unit (52) including a control unit for transmitting digital control signals to the first digital communication module (34). (Sc) digital communication unit (54); the first digital communication module (34) is arranged to receive the digital control signal (Sc) and transmit it to the first driver module (35) to drive the first power module (33) in such a way that the first power module (33) generates and obtains a first nominal supply current from the supply voltage based on the digital control signal (Sc); the architecture is characterized in that the control unit (52) is connected to the first driver module (35) via an analog type first wired connection (60) and is arranged to transmit a first analog braking command (O) via the first wired connection (60). af1 The first driver module (35) is arranged such that it drives the first power module (33) in accordance with the first analog braking command (O). af1 To generate and obtain the first degraded supply current (I) from the supply voltage. d1 ), thereby braking the wheel (10).

2. The architecture as described in claim 1, characterized in that, The brake (20) includes a second electromechanical actuator (70) having a second motor (72) and a second power module (73) connected to a second digital communication module (74) via a second driver module (75). The second digital communication module (74) is arranged to receive the digital control signal (Sc) and transmit it to the second driver module (75) to drive the second power module (73) such that the second power module (73) generates and obtains a second nominal supply current based on the digital control signal (Sc) and the supply voltage.

3. The architecture as described in claim 2, characterized in that, The first and second digital communication modules (34, 74) are interconnected to form a digital network.

4. The architecture as described in claim 2 or claim 3, characterized in that, The analog type second wired connection (80) connects the control unit (52) and the second driver module (75) together, and the control unit (52) is arranged to transmit the second analog braking command (O) via the second wired connection (80). af2 The second driver module (75) is arranged such that it drives the second power module (73) based on the second analog braking command (O). af2 To generate and obtain a second degraded supply current (I) from the supply voltage. d2 ), thereby braking the wheel (10).

5. The architecture as described in any one of claims 1 to 3, characterized in that, The first wired connection (60) is a unidirectional connection.

6. The architecture as described in any one of claims 1 to 3, characterized in that, Includes a first estimator device (55, 38) for estimating the first braking power generated by the first electromechanical actuator (30).

7. The architecture as described in claim 6, characterized in that, The first estimator device (55, 38) includes a first current sensor (55) for measuring the current consumed by the first motor (32) and / or a first motion sensor (38) for measuring the movement of the first movable member of the first motor (32).

8. The architecture as described in claim 6, characterized in that, The first driver module (35) is arranged to control the first degraded current (I) based on information delivered by the first estimator device (38, 55). d1 The generation of ).

9. A braking method performed by the architecture of any one of claims 1 to 8, the method comprising the following steps: • The brake setpoint is transmitted to the control unit (52), and subsequently: In nominal mode: • The controller (50) generates a digital control signal based on the braking setpoint and transmits it to the first digital communication module (34) via the digital communication unit (54). • The first power module (33) is used to generate and obtain a first nominal supply current based on the digital control signal (Sc) from the supply voltage; • A first braking power signal is transmitted to the controller (50) via the first digital communication module (34), the first braking power signal representing the first braking power generated by the first electromechanical actuator (30); • This causes the control unit (52) to generate an adjusted digital control signal (Sca) based on the first braking power signal and the first nominal value; • The adjusted digital control signal (Sca) is transmitted to the first digital communication module (34) via the digital communication unit (54); and • This causes the first power module (33) to generate and obtain a first adjusted nominal supply current from the supply voltage based on the adjusted digital control signal (Sca); as well as In downgrade mode: • The braking setpoint is converted into a degraded simulated braking command by means of the control unit (52); • The degraded analog braking command is transmitted to the first driver module (35) via the first wired connection (60). • Use the first driver module to generate a first degradation command for the first power module based on the degradation analog braking command; as well as • This causes the first power module (33) to generate and obtain a first degraded supply current (I) from the supply voltage based on the first degrade command. d1 ).

10. The braking method as described in claim 9, characterized in that, The first electromechanical actuator (30) includes a first estimator device (38, 55) for estimating a first braking power generated by the first electromechanical actuator (30), and the first driver module (35) is arranged to control the generation of the first degraded supply current based on information delivered by the first estimator device (38, 55), the method including the following additional steps: In the downgrade mode: • Using the first driver module (35) to define the first degraded supply current (I0) based on the information delivered by the first estimator device (38, 55) and the degraded analog braking command. d1 The adjusted value; as well as • The first power module (33) generates a first adjusted degraded supply current, the value of which is equal to the first degraded supply current (I0) as defined by the first driver module and obtained from the supply voltage. d1 The adjusted value is as stated in the text.

11. An aircraft (1000) comprising the architecture as described in any one of claims 1 to 8.

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