Multicopter Hand Controls for Intuitive Hover-to-Flight Transition

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Solution Overview

Problem

Existing aircraft control systems are not intuitive enough for novice pilots, requiring complex coordination of controls for transitions between hovering and forward flight, which can be challenging for amateur users.

Innovation Solution

A multicopter design featuring a thumbwheel for vertical control and a three-axis fingertip joystick for independent control of roll, pitch, and yaw, allowing pilots to focus on one hand control at a time, with processing that adjusts maximum velocity based on altitude and smooths responses to hand control signals for safer and more intuitive flight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If complex coordination of controls is used for transitions between hovering and forward flight, then control precision is improved, but ease of operation deteriorates

Engineering Contradiction:
Improvecontrol precisionVSAvoidease of operation
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The control system is segmented into independent vertical and horizontal control channels. The vertical control handles altitude and speed adjustments, while the horizontal control manages position and orientation. This segmentation allows novice pilots to focus on one dimension at a time, reducing cognitive load while maintaining precise control through automated coordination between segments.

Inventive Principle:
Principle #1Segmentation

2Ease of operation

If decoupled hand controls are used, then ease of operation is improved, but control precision deteriorates

Engineering Contradiction:
Improveease of operationVSAvoidcontrol precision
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The flight controller continuously monitors aircraft state (position, velocity, orientation) and provides automated feedback to coordinate the decoupled controls. When the pilot inputs vertical control commands, the system automatically adjusts horizontal parameters to maintain stable transitions, and vice versa. This closed-loop feedback ensures precise control coordination without requiring the pilot to manually manage complex interactions.

Inventive Principle:
Principle #23Feedback

3Reliability

If altitude-based velocity limits are implemented, then safety is improved, but productivity deteriorates

Engineering Contradiction:
ImprovesafetyVSAvoidproductivity
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The maximum velocity limit is dynamically adjusted based on the aircraft's altitude. At lower altitudes where safety risks are higher, the system enforces stricter velocity limits. As altitude increases and safety margins improve, the system automatically permits higher velocities. This dynamic adaptation allows the aircraft to operate safely at low altitudes while maintaining high productivity capabilities at higher altitudes.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentEP3676679B1Methods and flight controllers for a system operative to control a multicopter aircraft
Publication Date: 2023.07.26 KITTY HAWK CORP
  • EP3676679B1 patent drawingFigure 1
  • EP3676679B1 patent drawingFigure 2
  • EP3676679B1 patent drawingFigure 3

AI summary

Hand controls for an aircraft, including a single axis hand control which is configured to control movement of an aircraft along a vertical axis where the aircraft includes a plurality of rotors that are attached to the aircraft at a fixed position and the plurality of rotors rotate independently of one another., The hand controls further include a three axis hand control which is configured to control movement of the aircraft within a plane defined by a roll axis and a pitch axis, as well as about a yaw axis.