Self-Adjusting Flexure Gap for Spacecraft Charge Discharge Control
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Solution Overview
Problem
Spacecraft systems face uncontrolled electrical discharges due to charge accumulation, which can damage electronics and mechanical components, and existing solutions like slip bearings, continuous contact systems, and controlled gaps are inadequate in controlling discharge voltage and causing mechanical disturbances.
Innovation Solution
A self-adjusting gap system with a flexure and bleed circuit that automatically adjusts the gap to control discharge voltage and current, minimizing mechanical disturbances and protecting sensitive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slip bearings or continuous contact systems are used for charge discharge, then charge can be discharged, but mechanical disturbances and torque are generated
Solution Approach 1:
The patent replaces the mechanical contact-based discharge system (slip bearings, continuous contact systems) with a field-based discharge mechanism using a flexure and electric field to achieve charge discharge without mechanical torque or friction
Solution Approach 2:
The patent introduces a flexure as an intermediary element that creates a controllable gap between electrically isolated elements, allowing charge discharge through the gap without direct mechanical contact, thereby eliminating mechanical disturbances
2Reliability
If controlled gaps are used for discharge, then discharge voltage can be controlled, but the system complexity increases
Solution Approach 1:
The flexure automatically adjusts the gap size based on the charge accumulation, self-regulating the discharge voltage without requiring external control systems or complex mechanisms
Solution Approach 2:
The gap between the flexure and the opposing electrode is dynamically adjusted based on the charge level, allowing the system to adaptively control discharge voltage rather than using a fixed complex control system
3Reliability
If existing discharge systems are used, then charge can be discharged, but contamination is generated
Solution Approach 1:
By replacing mechanical contact systems with a field-based discharge mechanism across a flexure gap, the patent eliminates wear particles and contamination that would be generated by mechanical friction and contact
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
The system provides controlled discharge without torque or contamination, operates without external power, and has a long functional lifetime, effectively mitigating electrical discharge risks in space environments.
Implementation Method 1
the flexure is configured to flex or move due to the differential charge to reduce an initial first gap between the flexure and the contact fixture
Implementation Method 2
a contact point on one of the contact fixture and the flexure configured to be a discharge location for a discharge of a differential charge between the first electrically isolated element and the second electrically isolated element
Data Source
AI summary
A self-adjusting gap system, including: a flexure connected to a first electrically isolated element, wherein the flexure allows motion or has a flexible element, and has an electrically conductive element; a contact fixture connected to a second electrically isolated element, wherein the second electrically isolated element is electrically isolated from the first electrically isolated element; and a contact point on one of the contact fixture and the flexure configured to be a discharge location for a discharge of a differential charge between the first electrically isolated element and the second electrically isolated element; wherein the flexure is configured to flex or move due to the differential charge to reduce an initial first gap between the flexure and the contact fixture.