Fixture

Deutsch: Vorrichtung / Español: Dispositivo de sujeción / Português: Dispositivo de fixação / Français: Dispositif de fixation / Italiano: Dispositivo di fissaggio

Fixture in the space industry context refers to specialized devices, structures, or assemblies used to support, hold, or secure spacecraft components during manufacturing, testing, transport, or operations. These fixtures are crucial for ensuring the precise alignment, stability, and safety of spacecraft parts and systems under the various conditions they encounter, from the assembly process through launch and deployment. The design and use of fixtures are critical in maintaining the integrity and functionality of space systems, facilitating the complex processes involved in preparing spacecraft for their missions.

Description

In aerospace manufacturing and testing, fixtures must often meet stringent requirements for strength, precision, and compatibility with the components they are designed to hold. They can range from simple clamps or brackets to highly complex assemblies that simulate the conditions of space or support the spacecraft during dynamic testing. The use of fixtures is an integral part of the quality control process, ensuring that every component fits together perfectly and performs as expected under the stresses of launch and space operations.

Application Areas

• Assembly and Integration: Fixtures are used to hold parts in place accurately as spacecraft are assembled and systems are integrated.
• Testing: Specialized fixtures support spacecraft or components during tests, such as vibration testing, thermal vacuum tests, and structural load testing, simulating the conditions of launch and space to verify design integrity.
• Transport and Handling: Protecting spacecraft components during transport and handling, fixtures are designed to secure parts against movement and potential damage.
• Launch Preparation: Fixtures may also be used in the final stages of launch preparation, holding spacecraft in place on the launch vehicle until deployment.

Well-Known Examples

• Vibration Test Fixtures: Used to mount spacecraft or components on shake tables for simulating the launch environment to test structural integrity and durability.
• Thermal Vacuum Test Chambers: While not fixtures themselves, these chambers often contain fixtures designed to hold test items in place while exposing them to the temperature extremes and vacuum conditions of space.
• Satellite Deployment Mechanisms: In some contexts, the mechanisms used to hold satellites in place on a launch vehicle and then release them into orbit can be considered as specialized fixtures.

Treatment and Risks

The design and implementation of fixtures in the space industry involve several considerations:

• Material Compatibility: Selecting materials that will not introduce contaminants or react adversely with the spacecraft components.
• Precision and Reliability: Ensuring fixtures provide the exact positioning and support required, without fail, under test conditions or during transport.
• Adaptability: Designing fixtures that can accommodate components of different sizes, shapes, or configurations as needed.

Similar Terms or Synonyms

• Support structures
• Mounting devices
• Holding mechanisms

Weblinks

• top500.de: 'Fixture' in the glossary of the top500.de
• quality-database.eu: 'Fixture' in the glossary of the quality-database.eu

Summary

Fixtures play a vital role in the space industry, providing the necessary support, alignment, and security for spacecraft components throughout the manufacturing, testing, transport, and launch processes. Their design and implementation are key to ensuring that space missions are successful from the ground up, safeguarding the integrity and performance of sophisticated space systems.

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