Aircraft Ground Movement Control via Modular Torque Segmentation
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Solution Overview
Problem
Current methods for managing an aircraft's ground movement are complex and require recalculating control laws for each aircraft configuration, leading to a heavy workload for pilots and difficulty in adapting to changes in landing gear configurations.
Innovation Solution
A modular approach to managing aircraft ground movement, where the landing gear is organized into hierarchical levels (aircraft, undercarriage, and wheel) allows for the determination of specific setpoints and torques, simplifying control laws and enabling adaptability across different configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a regulation loop with many components is used to control each torque application member, then the aircraft can respond closely to the setpoint, but the control laws become complex and difficult to adapt to configuration changes
Solution Approach 1:
The control system is segmented into multiple independent control units, each associated with a specific torque application member. Each control unit receives a distributed portion of the longitudinal acceleration setpoint and angular speed setpoint, and independently generates control signals for its associated torque application member. This segmentation simplifies the control laws at each unit while maintaining overall system accuracy through coordinated operation of all units.
2Ease of operation
If complex control laws are used to distribute setpoints to torque application members, then the aircraft movement can be precisely controlled, but the system becomes difficult to adapt to different aircraft configurations
Solution Approach 1:
The control unit is designed with universal functionality to handle both longitudinal acceleration control and angular speed control through the same distributed setpoint mechanism. Each control unit can operate with different aircraft configurations (different numbers and positions of undercarriages and wheels) by receiving updated distribution parameters while maintaining the same basic control law structure, thus achieving both precise control and configuration adaptability.
3Measurement precision
If all control laws for setpoint distribution are recalculated for each configuration change, then precise control is maintained, but the workload and time required increases significantly
Solution Approach 1:
The control system pre-establishes the framework for setpoint distribution with generic control laws that can accommodate different configurations. When a configuration change occurs, only the distribution parameters (how the setpoint is divided among control units) need to be updated, not the fundamental control laws themselves. This preliminary structuring of the control system allows for rapid adaptation to configuration changes while maintaining control precision.
Data Source
Figure 1~2a
Figure 2b~3
Figure 4~5
AI summary
The invention relates to a method for managing the ground movement of an aircraft (1), the aircraft comprising at least one left main landing gear (3) and one right main landing gear (4) which each have wheels (3d,3g,4d,4g) associated with torque application elements to apply a torque to the wheels in response to a general instruction, the general instruction being decomposed into a longitudinal acceleration instruction (Γc) and an angular velocity instruction ( ), the method comprising the successive steps of decomposing the general instruction into general torque instructions (Mg1) to be generated by the torque application element associated with each wheel.