Movable-Vane Solar Sail for Direct Orbital Maneuver Control
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Solution Overview
Problem
Conventional solar sails are limited to providing propulsion due to their static configuration and large inertial moments, making them unsuitable for navigation, and require additional navigational components to direct the device, which increases weight and cost.
Innovation Solution
A solar sail design incorporating movable vanes with controllable orientations to generate controllable thrust, allowing direct navigation through solar radiation pressure by controlling the position of the vanes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional solar sails use a static planar configuration to minimize weight, then weight is reduced, but navigation capability is lost due to large inertial moments
Solution Approach 1:
The solar sail is divided into multiple independently controllable quadrants or segments. Each segment can be independently actuated to change its orientation and area, allowing the sail to navigate by differential thrust while maintaining overall structural integrity and minimizing weight.
Solution Approach 2:
The solar sail transitions from a static planar configuration to a dynamic configuration where segments can be actively controlled. By dynamically adjusting the area and orientation of different sail segments, the system achieves navigation capability without requiring heavy inertial control components.
2Force
If solar sails maximize surface area to generate sufficient thrust from photon momentum, then propulsion capability is improved, but device complexity increases due to additional control componentry
Solution Approach 1:
The sail segments serve multiple functions: they generate propulsion thrust through solar radiation pressure while simultaneously providing navigation control through differential area adjustment. This eliminates the need for separate control componentry, reducing overall device complexity.
Solution Approach 2:
The solar sail uses the solar radiation pressure itself for both propulsion and navigation control. By differentially adjusting segment areas, the system self-regulates its orientation and trajectory without requiring external control mechanisms, minimizing added complexity.
3Force
If solar sails use reflective coating to double photon momentum transfer, then propulsion efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
Instead of relying solely on perfect reflective coating precision, the system achieves controlled momentum transfer by adjusting the area and orientation parameters of individual segments. This allows for tolerance compensation through active control rather than requiring extreme manufacturing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise navigation and control of the solar sail, reducing weight and cost while maintaining a usable navigation system for planetary orbit and interplanetary applications, with the ability to modulate thrust for precise orbital maneuvers.
Implementation Method 1
solar radiation pressure to propel the solar sail in space
Implementation Method 2
the photons are specularly reflected, resulting in a transfer of momentum double that of a normally incident incoming photon
Data Source
AI summary
A solar sail includes a bus and a plurality of separate movable vanes coupled to the bus. Each movable vane includes a reflective surface for generating solar radiation pressure and propel the solar sail in space. Each vane may be movable relative to the bus in a fully deployed configuration such that an amount of thrust generated by solar radiation pressure on each vane is controllable.