Aircraft Control Margin Display for Effector Saturation Awareness
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Solution Overview
Problem
Modern aircraft, particularly vertical takeoff and landing (VTOL) aircraft, lack intuitive control margin feedback due to the complex interplay of multiple effectors providing lift, propulsion, and attitude control, making it challenging for pilots to determine the remaining control margin before input commands saturate the aircraft's capabilities.
Innovation Solution
The system calculates and displays the remaining control margin by obtaining current aircraft and effector state information, using a flight dynamics model to identify effector limits, and determining the range of potential effective input commands for the user input device, thereby providing a graphical indication of the control margin on a cockpit display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple effectors are used to provide lift, propulsion, and attitude control, then the aircraft's control capability and versatility are improved, but the control margin becomes non-intuitive and difficult to detect
Solution Approach 1:
The system continuously monitors effector positions, aircraft state, and control inputs, then provides real-time feedback to the pilot through visual display of control margin. This closed-loop feedback makes the previously non-intuitive control margin visible and actionable, allowing pilots to understand remaining control authority despite complex effector interactions
Solution Approach 2:
The control margin display system acts as an intermediary between the complex effector system and the pilot. It translates multiple effector states and aircraft dynamics into a single intuitive visual representation, bridging the gap between complex system behavior and pilot understanding
2Device complexity
If a shared inceptor is used to control multiple effectors, then the control system complexity is reduced, but the ability to provide intuitive control margin feedback is degraded
Solution Approach 1:
The system provides real-time visual feedback showing the relationship between inceptor position and available control margin. This feedback compensates for the lack of direct mechanical feedback in shared inceptor systems, allowing pilots to intuitively understand control authority despite the simplified control interface
Solution Approach 2:
The display uses color-coded indicators to represent different levels of control margin availability. This visual encoding provides immediate, intuitive understanding of control state without requiring complex instrumentation or increasing physical control system complexity
3Measurement precision
If effector limits are calculated using flight dynamics models, then the accuracy of control margin determination is improved, but the computational requirements and system complexity increase
Solution Approach 1:
Flight dynamics models and effector limit calculations are pre-computed and stored as lookup tables or pre-processing data structures. During flight, the system performs simple interpolation or selection from pre-computed data rather than full dynamic simulations, achieving high accuracy with minimal real-time computational burden
Solution Approach 2:
The system replaces complex real-time flight dynamics simulations with pre-computed models and simplified calculation algorithms. This substitution maintains measurement precision while dramatically reducing computational requirements and processing system complexity
Data Source
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AI summary
Vehicle systems and methods are provided for assisting operation by providing indication of remaining control margin with respect to actuation of a user input device to adjust an inertial rate of a vehicle. An exemplary method involves identifying one or more effector limits for one or more effectors associated with an aircraft based at least in part on current aircraft state information and current actuation state information for the one or more effectors using a flight dynamics model associated with the aircraft, determining a range of potential effective input commands for a user input device associated with the one or more effectors to adjust one or more inertial rates of the aircraft based on the one or more effector limits, the current aircraft state information and the current actuation state information, and providing a user indication of the range of potential effective input commands.