Bombardier. has been granted a patent for methods and systems that utilize sliding mode control and feedback linearization techniques to manage an aircraft’s bank angle, heading angle, and altitude. This technology enables autopilot functions capable of executing both aggressive and gentle flight maneuvers. GlobalData’s report on Bombardier gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Bombardier, Aircraft environment control system was a key innovation area identified from patents. Bombardier's grant share as of June 2024 was 52%. Grant share is based on the ratio of number of grants to total number of patents.
Autonomous aircraft flight control methods and systems
The patent US12019456B2 outlines a method and system for controlling the bank angle of an aircraft during flight. The process begins with receiving a commanded bank angle and calculating the bank angle error, which reflects the difference between the actual and commanded angles. A target rate of change for the bank angle is then computed using a sliding mode control technique, which incorporates the bank angle error. Subsequently, a target body roll rate is determined through a feedback linearization control technique, utilizing the target rate of change as an input. This target body roll rate is employed to manage the aircraft's actuators during flight, ensuring precise control of the aircraft's orientation.
The claims further detail the methodologies involved, including the use of specific formulas for calculating the target body roll rate and the target rate of change based on various thresholds of bank angle error. The sliding mode control technique is designed to adapt the target rate of change according to the magnitude of the bank angle error, employing different strategies depending on whether the error exceeds certain thresholds. Additionally, the system is applicable to blended wing body aircraft and includes a computer program product for implementing the control functions. The comprehensive approach aims to enhance the stability and responsiveness of aircraft during maneuvers, contributing to improved flight safety and performance.
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