A High-Availability Flap Differential Control System and Method

Abstract

The present invention belongs to the technical field of aviation systems and relates to a highly available flap differential control system and method. It includes: a flap and slat control handle, two flap and slat controllers, a hydraulic motor controller, a motor controller, a flap power drive device, two flap differential controllers, two flap differential actuators, eight flap actuators, two flap position sensors, two wingtip brakes, eight flap tilt sensors, two inner flaps, and two outer flaps. Based on the traditional centralized drive flap system architecture, the flap differential active control function is realized by adding flap differential actuators, flap differential controllers, and differential control logic. During the flap differential control process, the monitoring of the validity of flap differential commands, the monitoring of flap differential motion, and protection functions are added, improving the safety of the flap differential control function.

Description

Technical Field

[0001] The present invention belongs to the technical field of aviation systems, and relates to a high-availability flap differential control system and method. Background Art

[0002] 1) The next-generation civil aircraft in China requires that the aircraft should have the function of cruise camber control during the cruise phase. The implementation method is that when the aircraft is cruising, the inner and outer flaps can be differentially controlled, that is, it is required to independently control the inner or outer flap to deflect up and down to change the airfoil of the aircraft, so as to improve the cruise economic performance of the aircraft and reduce the fuel consumption rate.

[0003] 2) At present, almost all high-lift systems of large civil aircraft adopt centralized drive flaps. The centralized drive flap has a long transmission line system and many system components, resulting in a high probability of flap system jamming or disconnection faults. When a high-lift system jams or disconnects, the common practice is to require the high-lift system to hold the flap at the current fault position, resulting in the complete loss of the function of the entire high-lift system and low functional availability of the high-lift system.

[0004] Existing solutions to the above problems:

[0005] A patent of Boeing Company in the United States (patent authorization number: US9193440) proposes a method for realizing inner and outer flap differential. This method is mainly realized by a variable camber trim unit (VCTU) installed between the inner and outer flaps. The variable camber trim unit mainly includes a speed accumulation gearbox, a motor, a brake and a sensor. The variable camber trim unit realizes the release and connection of the inner and outer flaps according to the instructions of the high-lift system controller, and realizes the small-angle differential control of the inner and outer flaps according to the instructions of the system controller.

[0006] This patent realizes the small-angle differential control of the inner and outer flaps, but the patent itself describes more about the internal composition and implementation principle of the variable camber trim unit (VCTU), focusing on the intellectual property protection of the product structure. The problems it has are:

[0007] 1) There is no clear flap differential control system architecture scheme;

[0008] 2) There is no clear safety monitoring and protection strategy for the flap differential control system;

[0009] 3) When a differential control failure occurs, no corresponding solutions for the high-lift system are proposed;

[0010] 4) When the flap system jams or disconnects, how to improve the availability of the high-lift system, this patent cannot solve this problem. Summary of the Invention

[0011] Objective of the Invention: To provide a highly available flap differential control system and method.

[0012] Technical Solution:

[0013] A highly available flap differential control system includes: a flap and slat control handle 1, a first flap and slat controller 21, a second flap and slat controller 22, a hydraulic motor controller 3, a motor controller 4, a flap power drive device 5, a first flap differential controller 61, a second flap differential controller 62, a first flap differential actuator 71, a second flap differential actuator 72, eight flap actuators 8, a first flap position sensor 101, a second flap position sensor 102, a first wingtip brake 111, a second wingtip brake 112, eight flap tilt sensors 12, a first inner flap 131, a second inner flap 132, a first outer flap 141, and a second outer flap 142. Among them,

[0014] The left output shaft of the flap power drive device 5 is physically connected to the internal gearboxes of the flap actuators 8 on the first inner flap 131 and the first outer flap 141 through a torque tube 9, and transmits its output torque to the flap actuators 8 on the first inner flap 131 and the first outer flap 141. The two ends of the flap actuator linkage mechanism are respectively hinged to the flap actuator 8 and the first inner flap 131 and the first outer flap 141. The flap actuator 8 rotates under the drive of the left output shaft of the flap power drive device 5, thereby driving the flap actuator linkage mechanism connected to it to move. The movement of the flap actuator linkage mechanism drives the up and down deflection of the first inner flap 131 and the first outer flap 141. A first flap differential actuator 71 is installed between the first inner flap 131 and the first outer flap 141. The input end and the output end of the first flap differential actuator 71 are physically connected to the internal gearboxes of the flap actuators 8 on the first inner flap 131 and the first outer flap 141 through a torque tube 9 respectively. The control end of the first flap differential actuator 71 is electrically connected to the first flap differential controller 61;

[0015] The right output shaft of the flap power drive device 5 is physically connected to the internal gearboxes of the flap actuators 8 on the second inner flap 132 and the second outer flap 142 through the torque tube 9, and transmits its output torque to the flap actuators 8 on the second inner flap 132 and the second outer flap 142. Both ends of the flap actuator linkage mechanism are hinged to the flap actuator 8 and the second inner flap 132 and the second outer flap 142 respectively. The flap actuator 8 rotates under the drive of the right output shaft of the flap power drive device 5, thereby driving the flap actuator linkage mechanism connected to it to move. The movement of the flap actuator linkage mechanism drives the up and down deflection of the second inner flap 132 and the second outer flap 142. A second flap differential actuator 72 is installed between the second inner flap 132 and the second outer flap 142. The input end and the output end of the second flap differential actuator 72 are physically connected to the internal gearboxes of the flap actuators 8 on the second inner flap 132 and the second outer flap 142 through the torque tube 9 respectively. The control end of the second flap differential actuator 72 is electrically connected to the second flap differential controller 62;

[0016] The control end of the flap power drive device 5 is electrically connected to the hydraulic motor control machine 3 and the motor controller 4 respectively;

[0017] The output ends of the slat / flap control handle 1 are electrically connected to the first slat / flap controller 21 and the second slat / flap controller 22 respectively;

[0018] The first slat / flap controller 21 is connected to the second slat / flap controller 22, the first flap differential controller 61, the hydraulic motor controller 3, and the second flap differential controller 62 through a bus;

[0019] The second slat / flap controller 22 is connected to the motor controller 4 through a bus.

[0020] Further, the first flap differential actuator 71 and the second flap differential actuator 72 are release mechanisms with an input power supply of 540 VDC, and the electromagnetic clutch is used.

[0021] Further, the flap power drive device 5 is a hydraulic-electric hybrid drive device, and the hydraulic power source pressure is 5000 psi, and the input power supply is 540 VDC.

[0022] Further, the flap actuator 8 is a mechanical gear rotary actuator.

[0023] A high-availability flap differential control method, the method is executed by means of the above-mentioned high-availability flap differential control system, and the method includes:

[0024] The first slat / flap controller 21 and the second slat / flap controller 22 respectively receive the slat / flap control handle instructions and the flap differential control instructions sent by the main flight control system and determine whether to perform normal retraction / extension control or differential control;

[0025] Under normal retraction and extension control conditions, the first flap and slat controller 21 sends braking commands to the first flap differential actuator 71 and the second flap differential actuator 72 respectively through the first flap differential controller 61 and the second flap differential controller 62 to ensure that the first inner flap 131, the second inner flap 132, the first outer flap 141 and the second outer flap 142 are in a linked state;

[0026] The first flap and slat controller 21 and the second flap and slat controller 22 generate flap position control commands respectively according to the flap and slat control handle commands, the actual positions feedback by the first flap position sensor 101 and the second flap position sensor 102, and the high-lift system state, and then control the flap power drive device 5 to generate the driving torque required for flap movement through the hydraulic motor controller 3 and the motor controller 4 respectively. The driving torque generated by the flap power drive device 5 is transmitted to all flap actuators 8 through the torque tube assembly, so as to drive the first inner flap 131, the second inner flap 132, the first outer flap 141 and the second outer flap 142 to perform normal retraction and extension movements simultaneously;

[0027] In the flap differential control state, when the first flap and slat controller 21 and the second flap and slat controller 22 receive the effective inner flap differential control command sent by the main flight control system, they will generate a flap differential enable signal, a wingtip brake braking signal and an inner flap differential position command;

[0028] The first flap and slat controller 21 sends the flap differential enable signal to the first flap differential controller 61 and the second flap differential controller 62 through the data bus. After receiving the flap differential enable signal, the first flap differential controller 61 and the second flap differential controller 62 control the first flap differential actuator 71 and the second flap differential actuator 72 respectively to release the braking, so that the first inner flap 131 is disengaged from the first outer flap 141 and the second inner flap 132 is disengaged from the second outer flap 142. The first wingtip brake 111 and the second wingtip brake 112 hold the first outer flap 141 and the second outer flap 142 respectively according to the wingtip brake braking signal. The first flap and slat controller 21 sends the inner flap differential position command to the hydraulic motor controller 3 through the data bus, and the hydraulic motor controller 3 controls the flap power drive device 5 to generate a driving torque, so as to drive the first inner flap 131 and the second inner flap 132 to deflect up and down at a small angle;

[0029] When the first flap and slat controller 21 and the second flap and slat controller 22 receive the effective outer flap differential control command sent by the main flight control system, they will generate a flap differential enable signal, a wingtip brake release signal, a flap power drive device braking signal and an outer flap differential position command;

[0030] The first flap slat controller 21 and the second flap slat controller 22 simultaneously send a wingtip brake release signal to the first wingtip brake 111 and the second wingtip brake 112, and then send a flap power drive device brake signal to the hydraulic motor controller 3 and the motor controller 4 respectively; the first flap slat controller 21 sends a flap differential enable signal and an outer flap differential position command to the first flap differential controller 61 and the second flap differential controller 62 through the bus. After receiving the flap differential enable signal, the first flap differential controller 61 and the second flap differential controller 62 respectively control the first flap differential actuator 71 and the second flap differential actuator 72 to release the brake, so that the first inner flap 131 is disengaged from the first outer flap 141 and the second inner flap 132 is disengaged from the second outer flap 142. Then, the first flap differential actuator 71 and the second flap differential actuator 72 generate a driving torque according to the outer flap differential position command to drive the first outer flap 141 and the second outer flap 142 to deflect up and down at a small angle.

[0031] Further, in the flap differential control state, the first flap slat controller 21 and the second flap slat controller 22 respectively monitor the flap movement speed, tilt, asymmetry, and position overrun of the first inner flap 131, the second inner flap 132, the first outer flap 141, and the second outer flap 142.

[0032] Further, in the normal retraction and extension state, the first flap slat controller 21 and the second flap slat controller 22 respectively monitor the flap movement speed, tilt, asymmetry, and position overrun of the first inner flap 131, the second inner flap 132, the first outer flap 141, and the second outer flap 142.

[0033] Further, when the first flap slat controller 21 or the second flap slat controller 22 detects a jamming fault or disengagement fault in the movement of the first inner flap 131, the second inner flap 132, the first outer flap 141, or the second outer flap 142, it will identify and locate the fault, and hold the faulty first inner flap 131 and second inner flap 132 or the faulty first outer flap 141 and second outer flap 142 at the current position;

[0034] The first flap slat controller 21 will generate a flap differential enable signal, and through the first flap differential controller 61 and the second flap differential controller 62, respectively control the first flap differential actuator 71 and the second flap differential actuator 72 to disengage the first inner flap 131 from the first outer flap 141 and at the same time disengage the second inner flap 132 from the second outer flap 142. Then, the first flap slat controller 21 and the second flap slat controller 22 move the non-faulty flaps to the commanded position according to the flap slat control handle command.

[0035] Beneficial effects:

[0036] The active flap differential control system provided by the present invention realizes the active control function of flap differential on the basis of the traditional centralized drive flap system architecture by adding flap differential actuators, flap differential controllers, and differential control logic. During the flap differential control process, the monitoring of the validity of flap differential commands, the monitoring of flap differential movement, and protection functions are added, improving the safety of the flap differential control function.

[0037] It has all the functions of the traditional centralized drive flap control system, and the specific functions are: flap normal retraction and extension control function, flap holding function, system status monitoring function, fault protection, and fault reporting, etc.

[0038] During aircraft cruise, it can achieve independent control of the inner and outer flaps according to the flap differential control command. When the inner flap performs small-angle differential control, the outer flap is in the holding state; when the outer flap performs small-angle differential control, the inner flap is in the holding state. During the differential control process of the inner and outer flaps, the flap differential control system continuously monitors their motion states to ensure flight safety.

[0039] When a jamming fault or disconnection fault occurs at any position in the flap system transmission line system, the designed flap differential control system can hold the faulty flap at the current position and control the remaining available flaps to retract and extend normally, thereby improving the availability of the high-lift system. Brief Description of the Drawings

[0040] Figure 1 It is a structural diagram of the flap differential control system;

[0041] Figure 2 It is a working logic diagram of the flap differential control system;

[0042] Among them, there are a flap and slat control handle 1, a first flap and slat controller 21, a second flap and slat controller 22, a hydraulic motor controller 3, a motor controller 4, a flap power drive device 5, a first flap differential controller 61, a second flap differential controller 62, a first flap differential actuator 71, a second flap differential actuator 72, 8 flap actuators 8, a torque tube assembly 9, a first flap position sensor 101, a second flap position sensor 102, a first wing tip brake 111, a second wing tip brake 112, 8 flap tilt sensors 12, a first inner flap 131, a second inner flap 132, a first outer flap 141, and a second outer flap 142. Detailed Embodiment

[0043] Combined with Figure 1 and Figure 2 The present invention will be further described.

[0044] A high-availability flap differential control system includes 1 flap and slat control handle 1, 2 flap and slat controllers (the first flap and slat controller 21 and the second flap and slat controller 22), 1 hydraulic motor controller 3, 1 motor controller 4, 1 flap power drive device 5, 2 flap differential controllers (the first flap differential controller 61 and the second flap differential controller 62), 2 flap differential actuators (the first flap differential actuator 71 and the second flap differential actuator 72), 8 flap actuators 8, several torque tube assemblies 9, 2 flap position sensors (the first flap position sensor 101 and the second flap position sensor 102), 2 wingtip brakes (the first wingtip brake 111 and the second wingtip brake 112), 8 flap tilt sensors 12, 2 inner flaps (the first inner flap 131 and the second inner flap 132), and 2 outer flaps (the first outer flap 141 and the second outer flap 142).

[0045] Before the aircraft takes off:

[0046] The first flap and slat controller 21 sends braking commands to the first flap differential actuator 71 and the second flap differential actuator 72 through the first flap differential controller 61 and the second flap differential controller 62 respectively, to ensure that the first inner flap 131, the second inner flap 132, the first outer flap 141, and the second outer flap 142 are in a linked state. The first flap and slat controller 21 and the second flap and slat controller 22 receive the control handle position information sent by the flap and slat control handle 1, and at the same time calculate the flap position control command according to the actual flap position and system status fed back by the first flap position sensor 101 and the second flap position sensor 102, and then control the flap power drive device 5 to generate the driving torque required for the flap movement through the hydraulic motor controller 3 and the motor controller 4 respectively. The driving torque generated by the flap power drive device 5 is transmitted to the flap actuators 8 through the torque tube assemblies 9, so as to drive the first inner flap 131, the second inner flap 132, the first outer flap 141, and the second outer flap 142 to perform normal retraction and extension movements.

[0047] When the aircraft is cruising:

[0048] When the first flap slat controller 21 and the second flap slat controller 22 receive a valid inner flap differential control command sent by other systems, a flap differential enable signal, a wingtip brake braking signal, and an inner flap differential position command will be generated. The first flap slat controller 21 sends the flap differential enable signal to the first flap differential controller 61 and the second flap differential controller 62 through the data bus. After receiving the control command, the first flap differential controller 61 and the second flap differential controller 62 respectively control the first flap differential actuator 71 and the second flap differential actuator 72 to release the braking, so that the first inner flap 131 is disengaged from the first outer flap 141 and the second inner flap 132 is disengaged from the second outer flap 142. The first wingtip brake 111 and the second wingtip brake 112 respectively hold the first outer flap 141 and the second outer flap 142 according to the wingtip brake braking signal. The first flap slat controller 21 sends the inner flap differential position command to the hydraulic motor controller 3 through the data bus, and the hydraulic motor controller 3 controls the flap power drive device 5 to generate a driving torque, so as to drive the first inner flap 131 and the second inner flap 132 to deflect up and down at a small angle.

[0049] When the first flap slat controller 21 and the second flap slat controller 22 receive a valid outer flap differential control command sent by other systems, a flap differential enable signal, a wingtip brake release signal, a flap power drive device braking signal, and an outer flap differential position command will be generated. The first flap slat controller 21 and the second flap slat controller 22 simultaneously send a release braking control command to the first wingtip brake 111 and the second wingtip brake 112; the first flap slat controller 21 sends the flap differential enable signal and the outer flap differential position command to the first flap differential controller 61 and the second flap differential controller 62 through the bus. After receiving the control command, the first flap differential controller 61 and the second flap differential controller 62 respectively control the first flap differential actuator 71 and the second flap differential actuator 72 to release the braking. The first flap differential actuator 71 and the second flap differential actuator 72 generate a driving torque according to the outer flap position control command to drive the first outer flap 141 and the second outer flap 142 to deflect up and down at a small angle.

[0050] Whether it is inner flap differential control or outer flap differential control, the flap slat controller continuously monitors the movement state of the flap differential control system for flap movement speed, tilt, asymmetry, and position overrun, and provides corresponding fault protection measures.

[0051] When the aircraft is descending:

[0052] The first flap slat controller 21 retracts both the inner and outer flaps to 0°. At the same time, the first flap slat controller 21 disconnects the flap differential enable signal and controls the first flap differential actuator 71 and the second flap differential actuator 72 to brake, so as to restore the linked control of the first inner flap 131, the second inner flap 132, the first outer flap 141 and the second outer flap 142. The FSECU flap slat controller 2 then controls the first inner flap 131, the second inner flap 132, the first outer flap 141 and the second outer flap 142 to move to the landing configuration position according to the handle position command issued by the flap slat control handle 1.

[0053] System fault-tolerant reconstruction control:

[0054] When the flap slat controller 2 detects a jamming fault or disconnection fault in the movement of the first inner flap 131, the second inner flap 132, the first outer flap 141 and the second outer flap 142, it will identify and locate the fault and hold the faulty pair of inner flaps or outer flaps in the current position. The first flap slat controller 21 will generate a flap differential enable signal and release the first inner flap 131, the second inner flap 132, the first outer flap 141 and the second outer flap 142 through the left and right flap differential controllers 6 and the first flap differential actuator 71 and the second flap differential actuator 72, and then move the remaining available flaps to the command position according to the command of the flap slat control handle 1, thus improving the availability of the high-lift system.

Claims

1. A high-availability flap differential control system, characterized in that, Including: A slat / flap control handle (1), a first slat / flap controller (21), a second slat / flap controller (22), a hydraulic motor controller (3), an electric motor controller (4), a flap power drive device (5), a first flap differential controller (61), a second flap differential controller (62), a first flap differential actuator (71), a second flap differential actuator (72), eight flap actuators (8), a first flap position sensor (101), a second flap position sensor (102), a first wingtip brake (111), a second wingtip brake (112), eight flap tilt sensors (12), a first inner flap (131), a second inner flap (132), a first outer flap (141), and a second outer flap (142), wherein The left output shaft of the flap power drive device (5) is physically connected to the internal gearboxes of the flap actuators (8) on the first inner flap (131) and the first outer flap (141) through a torque tube (9), and transmits its output torque to the flap actuators (8) on the first inner flap (131) and the first outer flap (141). Both ends of the flap actuator linkage are hinged to the flap actuator (8) and the first inner flap (131) and the first outer flap (141) respectively. The flap actuator (8) rotates under the drive of the left output shaft of the flap power drive device (5), thereby driving the flap actuator linkage connected thereto to move. The movement of the flap actuator linkage drives the up and down deflection of the first inner flap (131) and the first outer flap (141). A first flap differential actuator (71) is installed between the first inner flap (131) and the first outer flap (141). The input end and the output end of the first flap differential actuator (71) are physically connected to the internal gearboxes of the flap actuators (8) on the first inner flap (131) and the first outer flap (141) through a torque tube (9) respectively. The control end of the first flap differential actuator (71) is electrically connected to the first flap differential controller (61); The right output shaft of the flap power drive device (5) is physically connected to the internal gearboxes of the flap actuators (8) on the second inner flap (132) and the second outer flap (142) through a torque tube (9), and transmits its output torque to the flap actuators (8) on the second inner flap (132) and the second outer flap (142). Both ends of the flap actuator linkage are hinged to the flap actuator (8) and the second inner flap (132) and the second outer flap (142) respectively. The flap actuator (8) rotates under the drive of the right output shaft of the flap power drive device (5), thereby driving the flap actuator linkage connected to it to move. The movement of the flap actuator linkage drives the up and down deflection of the second inner flap (132) and the second outer flap (142). A second flap differential actuator (72) is installed between the second inner flap (132) and the second outer flap (142). The input end and the output end of the second flap differential actuator (72) are physically connected to the internal gearboxes of the flap actuators (8) on the second inner flap (132) and the second outer flap (142) through a torque tube (9) respectively. The control end of the second flap differential actuator (72) is electrically connected to the second flap differential controller (62); The control end of the flap power drive device (5) is electrically connected to the hydraulic motor controller (3) and the motor controller (4) respectively; The output end of the slat / flap control handle (1) is electrically connected to the first slat / flap controller (21) and the second slat / flap controller (22) respectively; The first slat / flap controller (21) is bus-connected to the second slat / flap controller (22), the first flap differential controller (61), the hydraulic motor controller (3), and the second flap differential controller (62) respectively; The second slat / flap controller (22) is bus-connected to the motor controller (4).

2. The high-availability flap differential control system according to claim 1, characterized in that, The first flap differential actuator (71) and the second flap differential actuator (72) are electromagnetic clutches with a release mechanism having an input power supply of 540 VDC.

3. The high-availability flap differential control system according to claim 1, characterized in that, The flap power drive device (5) is a hydraulic-electric hybrid drive device, and the pressure of the hydraulic power source is 5000 psi, and the input power supply is 540 VDC.

4. The high-availability flap differential control system according to claim 1, characterized in that, The flap actuator (8) is a mechanical gear rotating actuator.

5. A high-availability flap differential control method, characterized in that, The method is executed by means of the highly available flap differential control system described in any one of claims 1-4. The method includes: The first slat / flap controller (21) and the second slat / flap controller (22) respectively receive the slat / flap control handle instruction and the flap differential control instruction sent by the main flight control system and determine whether to perform normal retraction / extension control or differential control; In the case of normal retraction / extension control, the first slat / flap controller (21) issues braking instructions to the first flap differential actuator (71) and the second flap differential actuator (72) respectively through the first flap differential controller (61) and the second flap differential controller (62) to ensure that the first inner flap (131), the second inner flap (132), the first outer flap (141), and the second outer flap (142) are in a linkage state; The first flap slat controller (21) and the second flap slat controller (22) respectively generate flap position control commands according to the flap slat control handle commands, the actual positions feedback by the first flap position sensor (101) and the second flap position sensor (102), and the high-lift system state. Then, the flap position control commands are respectively used to control the flap power drive device (5) to generate the driving torque required for flap movement through the hydraulic motor controller (3) and the motor controller (4). The driving torque generated by the flap power drive device (5) is transmitted to all flap actuators (8) through the torque tube assembly, so as to drive the first inner flap (131), the second inner flap (132), the first outer flap (141) and the second outer flap (142) to perform normal retraction and extension movements simultaneously; In the flap differential control state, when the first flap slat controller (21) and the second flap slat controller (22) receive the valid inner flap differential control command sent by the main flight control system, they will generate a flap differential enable signal, a wingtip brake braking signal and an inner flap differential position command; The first flap slat controller (21) sends the flap differential enable signal to the first flap differential controller (61) and the second flap differential controller (62) through the data bus. After receiving the flap differential enable signal, the first flap differential controller (61) and the second flap differential controller (62) respectively control the first flap differential actuator (71) and the second flap differential actuator (72) to release the brake, so that the first inner flap (131) is disengaged from the first outer flap (141) and the second inner flap (132) is disengaged from the second outer flap (142). The first wingtip brake (111) and the second wingtip brake (112) respectively hold the first outer flap (141) and the second outer flap (142) according to the wingtip brake braking signal. The first flap slat controller (21) sends the inner flap differential position command to the hydraulic motor controller (3) through the data bus. The hydraulic motor controller (3) controls the flap power drive device (5) to generate a driving torque, so as to drive the first inner flap (131) and the second inner flap (132) to deflect up and down at a small angle; When the first flap slat controller (21) and the second flap slat controller (22) receive the valid outer flap differential control command sent by the main flight control system, they will generate a flap differential enable signal, a wingtip brake release signal, a flap power drive device braking signal and an outer flap differential position command; The first flap slat controller (21) and the second flap slat controller (22) simultaneously send a wingtip brake release signal to the first wingtip brake (111) and the second wingtip brake (112), and then send a flap power drive device brake signal to the hydraulic motor controller (3) and the motor controller (4) respectively; the first flap slat controller (21) sends the flap differential enable signal and the outer flap differential position command to the first flap differential controller (61) and the second flap differential controller (62) through the bus. After receiving the flap differential enable signal, the first flap differential controller (61) and the second flap differential controller (62) respectively control the first flap differential actuator (71) and the second flap differential actuator (72) to release the brake, so that the first inner flap (131) is disengaged from the first outer flap (141) and the second inner flap (132) is disengaged from the second outer flap (142). The first flap differential actuator (71) and the second flap differential actuator (72) then generate a driving torque according to the outer flap differential position command to drive the first outer flap (141) and the second outer flap (142) to deflect slightly up and down.

6. The high-availability flap differential control method according to claim 5, characterized in that, In the flap differential control state, the first flap slat controller (21) and the second flap slat controller (22) respectively monitor the flap movement speed, tilt, asymmetry, and position overrun of the first inner flap (131), the second inner flap (132), the first outer flap (141), and the second outer flap (142).

7. The high-availability flap differential control method according to claim 5, characterized in that, In the normal retraction and extension state, the first flap slat controller (21) and the second flap slat controller (22) respectively monitor the flap movement speed, tilt, asymmetry, and position overrun of the first inner flap (131), the second inner flap (132), the first outer flap (141), and the second outer flap (142).

8. The high-availability flap differential control method according to claim 5, characterized in that, When the first flap slat controller (21) or the second flap slat controller (22) detects a jamming fault or disengagement fault during the movement of the first inner flap (131), the second inner flap (132), the first outer flap (141), or the second outer flap (142), it will identify and locate the fault, and hold the faulty first inner flap (131) and second inner flap (132) or the faulty first outer flap (141) and second outer flap (142) at the current position; The first flap slat controller (21) will generate a flap differential enable signal, and through the first flap differential controller (61) and the second flap differential controller (62), respectively control the first flap differential actuator (71) and the second flap differential actuator (72) to disengage the first inner flap (131) from the first outer flap (141) and at the same time disengage the second inner flap (132) from the second outer flap (142). The first flap slat controller (21) and the second flap slat controller (22) then move the flaps without faults to the commanded position according to the flap slat control handle command.

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