Compact Nose-Wheel Steering System with Hydraulic Control
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Summary
Problems
Aircraft nose-wheel steering systems are cumbersome due to their large dimensions and require complex alignment and mechanical balancing, making them difficult to accommodate and operate effectively.
Innovation solutions
A nose-wheel steering system incorporating a hydraulic actuator with a gearing mechanism, including a steering collar, idler gear, and pinion with a larger second gear radius, which provides a mechanical advantage for compact design and easier alignment, along with a hydraulic control system for precise fluid flow management.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a traditional axially translatable toothed rack is used for nose-wheel steering, then the steering function is achieved, but the system becomes large in dimension and difficult to accommodate when not in use
Why choose this principle:
The steering system is divided into multiple functional segments: a rotary actuator for rotation, a pinion gear for motion conversion, and a rack for linear displacement. This segmentation allows each component to be optimized independently and packed more efficiently, reducing the overall volume while maintaining the steering function.
Principle concept:
If a traditional axially translatable toothed rack is used for nose-wheel steering, then the steering function is achieved, but the system becomes large in dimension and difficult to accommodate when not in use
Why choose this principle:
The system transitions from purely axial translation to a multi-dimensional mechanism involving rotation (actuator), radial pinion engagement, and axial rack movement. This dimensional change allows compact packaging by utilizing rotational space and multi-axis motion rather than requiring long axial travel distance.
Application Domain
Data Source
AI summary:
A nose-wheel steering system incorporating a hydraulic actuator with a gearing mechanism, including a steering collar, idler gear, and pinion with a larger second gear radius, which provides a mechanical advantage for compact design and easier alignment, along with a hydraulic control system for precise fluid flow management.
Abstract
A nose-wheel steering system is disclosed. In various embodiments, the system includes an actuator; a strut; and a gearing mechanism operably coupling the actuator to the strut, the gearing mechanism including a steering collar attached to the strut, and idler gear engaged with the actuator and a pinion having a first gear engaged with the idler gear and a second gear engaged with the steering collar.