Invention Grant
- Patent Title: Rotorcraft control mode transition smoothing
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Application No.: US15446911Application Date: 2017-03-01
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Publication No.: US10481615B2Publication Date: 2019-11-19
- Inventor: Sung Kyun Kim
- Applicant: Bell Helicopter Textron Inc.
- Applicant Address: US TX Fort Worth
- Assignee: Bell Textron Inc.
- Current Assignee: Bell Textron Inc.
- Current Assignee Address: US TX Fort Worth
- Agency: Slater Matsil, LLP
- Main IPC: G05D1/08
- IPC: G05D1/08 ; B64C13/50 ; B64C27/04 ; B64C13/04

Abstract:
A method of operating a rotorcraft includes transitioning from a first mode to a second mode when a velocity of the rotorcraft exceeds a first velocity threshold. Transitioning between the first and second modes includes fading out a gain of a dynamic controller over a first period of time, and decreasing a value of an integrator of the dynamic controller over a second period of time. In the first mode, the translational speed of the rotorcraft is determined based on a pilot stick signal, and in the second mode, an output of an attitude rate controller is proportional to an amplitude of the pilot stick signal.
Public/Granted literature
- US20180251207A1 ROTORCRAFT CONTROL MODE TRANSITION SMOOTHING Public/Granted day:2018-09-06
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