Single-Point Release Mechanism for Spacecraft Panels

Solution Overview

Problem

Existing spacecraft solar panel deployment mechanisms are complex, heavy, costly, and prone to failure due to multiple release assemblies, which increase the risk of mechanical and electrical redundancy issues and complicate the deployment process.

Innovation Solution

A single-point release mechanism using a membrane-based actuator with thermally sensitive material, such as paraffin wax, that expands to push a pin and deploy solar panels, reducing the number of components and simplifying the deployment process by utilizing a heating source activated by an electrical signal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If multiple release assemblies are used to deploy solar panels, then the deployment can be achieved, but the device complexity and weight increase

Engineering Contradiction:

Improverelease mechanism complexityVSAvoiddeployment reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Multiple release assemblies are merged into a single release mechanism that uses one actuator to simultaneously release all panels. The actuator connects to multiple pins through a common linkage system, allowing one actuation event to trigger the release of all panels at once, thereby reducing complexity while maintaining deployment reliability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single actuator is designed to perform multiple functions by releasing multiple pins through a universal linkage mechanism. This multi-functional design allows one component to replace what would traditionally require multiple separate actuators, reducing overall system complexity while ensuring all panels are released reliably.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple release assemblies are used, then panels can be deployed, but the weight of the mechanism increases

Engineering Contradiction:

Improvedeployment reliabilityVSAvoidrelease mechanism weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

Multiple release assemblies are merged into a single release mechanism that uses one actuator to simultaneously release all panels. The actuator connects to multiple pins through a common linkage system, allowing one actuation event to trigger the release of all panels at once, thereby reducing complexity while maintaining deployment reliability.

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If multiple release assemblies with multiple actuators are used, then panels can be deployed, but the cost and manufacturing complexity increase

Engineering Contradiction:

Improvenumber of componentsVSAvoidassembly simplicity

Core Design Contradiction:

Device complexityVSEase of manufacture

Solution Approach 1:

Multiple release assemblies are merged into a single release mechanism that uses one actuator to simultaneously release all panels. The actuator connects to multiple pins through a common linkage system, allowing one actuation event to trigger the release of all panels at once, thereby reducing complexity while maintaining deployment reliability.

Inventive Principle:

Principle #5Merging (Combining)

4Reliability

If traditional release mechanisms are used, then panels can be released, but mechanical and electrical redundancy issues occur

Engineering Contradiction:

Improvefailure rateVSAvoidnumber of release assemblies

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Multiple release assemblies are merged into a single release mechanism that uses one actuator to simultaneously release all panels. The actuator connects to multiple pins through a common linkage system, allowing one actuation event to trigger the release of all panels at once, thereby reducing complexity while maintaining deployment reliability.

Inventive Principle:

Principle #5Merging (Combining)

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

This solution provides a reliable, lightweight, and cost-effective mechanism for deploying solar panels efficiently, minimizing failure rates and streamlining the assembly process while ensuring timely deployment and reduced power consumption.

Implementation Method 1

The thermally sensitive material is configured to expand upon receiving a thermal energy and cause the actuator to extend.

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Implementation Method 2

a membrane-based actuator that provides a linear movement based on a phase change of the thermally sensitive material contained in the membrane-based actuator

Methodology Applied

Scientific EffectPhase change: Phase Change

Data Source

PatentEP3445657B1Single-point release mechanism for spacecraft

Publication Date: 2020.10.28 LOCKHEED MARTIN CORP

Figure 1A~1C
Figure 2A
Figure 2B

AI summary

A spacecraft includes a main body, a set of panels attached to a side of the main body, and a retaining the set of panels adjacent to the main body. The single-point release device includes a heater for generating heat to expand a thermally sensitive material, a membrane-based actuator for providing a linear movement based on a phase change of the thermally sensitive material contained in the membrane-based actuator, and a release fitting and a release rod for retaining and selectively releasing a pin based on the linear movement of the membrane-based actuator. The membrane-based actuator is configured to push the pin through the release fitting.