Aircraft Heading Error Compensation for Ground Speed Control
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Solution Overview
Problem
Conventional aircraft control systems fail to account for the coupling between heading and lateral/longitudinal ground speeds, leading to over- or under-compensation in correcting movement errors.
Innovation Solution
A method and system that calculate heading errors and generate corresponding lateral and longitudinal movement error values by using ground-referenced data, incorporating these errors to adjust yaw, pitch, and roll for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional systems correct lateral ground speed error by adjusting roll and longitudinal ground speed error by adjusting pitch, then the control system is simple to operate, but the system fails to account for the relationship between heading error and actual lateral and longitudinal ground speeds, resulting in over-compensation or under-compensation
Solution Approach 1:
The system calculates heading error based on the difference between ground-referenced heading and target heading, then uses this heading error to generate corrected lateral and longitudinal ground speed error values. This feedback loop ensures that the control system accounts for the relationship between heading error and ground speeds, preventing over-compensation or under-compensation while maintaining accurate ground speed measurement.
Solution Approach 2:
The patent introduces heading error as an intermediary parameter that mediates between the aircraft's orientation and its ground speed measurements. By calculating lateral and longitudinal ground speed errors based on both ground-referenced movement data and heading error, the system accurately decomposes the ground speed vector into corrective components without requiring complex direct measurements of lateral and longitudinal speeds.
2Manufacturing precision
If the system accounts for the relationship between heading error and ground speeds, then the precision of error correction is improved, but the calculation complexity increases
Solution Approach 1:
The system transforms the ground speed correction problem from directly measuring lateral and longitudinal speed errors to calculating them from ground-referenced movement data and heading error. By changing the parameters used for error calculation (from direct speed measurements to heading-based calculations), the system achieves precise error correction while keeping the calculation process manageable through standardized trigonometric relationships.
Data Source
AI summary
Systems and methods for controlling aircraft obtain at least one of ground-referenced longitudinal movement data of the aircraft and ground-referenced lateral movement data of the aircraft. A round-referenced heading of the aircraft is obtained and a heading error is calculated based on a difference between the ground-referenced heading and a target heading. A lateral movement error value is generated based on at least one of the ground-referenced longitudinal movement data and ground-referenced lateral movement data, and based on the heading error.