Four-Axis Thrust Vectoring for Air Vehicle Attitude Stabilization
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Solution Overview
Problem
Air vehicles with rotating rotors face difficulties in promptly returning to their original position and attitude after disturbances, such as gusts, due to unstable attitude around the roll axis.
Innovation Solution
The air vehicle is equipped with a thrust generation unit consisting of fore, aft, left, and right thrust generators, each capable of changing thrust magnitude and direction, allowing for separate control of forces in X, Y, and Z axes, as well as moments around pitch, roll, and yaw axes, enabling precise attitude stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rotor configuration is used for air vehicle, then结构简单性 is maintained, but attitude stability and response speed deteriorate when disturbed by external forces
Solution Approach 1:
The thrust generation system is segmented into four independent thrust generators (fore, aft, left, right) positioned at different locations on the air vehicle. Each thrust generator can independently adjust its thrust magnitude and direction, allowing separate control of forces in X, Y, Z axes and moments around pitch, roll, and yaw axes. This segmentation enables precise attitude stabilization without requiring complex mechanical structures.
Solution Approach 2:
Each thrust generator is designed with dynamic capability to change both the magnitude and direction of thrust independently. The thrust generators can dynamically adjust their output to counteract external disturbances and maintain attitude stability, providing rapid response to gusts and other environmental factors while keeping the overall system structure relatively simple.
2Ease of operation
If thrust magnitude and direction are independently controllable, then control precision is improved, but system complexity increases
Solution Approach 1:
Each thrust generator serves multiple functions: it can generate thrust in different directions, control moments around different axes, and independently adjust magnitude. This multi-functionality allows a single thrust generator to perform what would traditionally require multiple separate control mechanisms, thereby improving control precision without proportionally increasing system complexity.
Solution Approach 2:
The system controls attitude by changing parameters (thrust magnitude and direction) of the four thrust generators rather than through complex mechanical adjustments. By independently varying these parameters, the system achieves precise control of forces and moments with relatively simple control mechanisms.
Data Source
AI summary
A fuselage, a support part supporting the fuselage, a thrust generation unit including fore, aft, left, and right thrust generators, and a flight controller controlling the unit are included. The fore, aft, left, and right thrust generators are respectively positioned on first, second, third, and fourth axes respectively extending in support part fore and aft, fore and aft, left and right, and left and right directions. The generators are respectively at the support part front, back, left, and right. The generators respectively generate thrust in directions intersecting the first, second, third, and fourth axes and can change thrust magnitude and direction around them. All generators are connected to the support part.