lecture20 - ECE2984 Lecture20 JosephBaker(ECEDept...

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ECE 2984 Lecture 20: STRUCTURES AND MECHANISMS SUBSYSTEM Joseph Baker (ECE Dept) ECE 2984: Exploration of Space Lecture 20: Structures and Mechanisms
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Last Lecture LAST LECTURE: Environmental Control and Life Support Subsystem Thermal Control fe pport Life Support THIS LECTURE: Structures Subsystem: Mechanisms Structural Analysis Resonance Materials Joseph Baker (ECE Dept) ECE 2984: Exploration of Space Lecture 20: Structures and Mechanisms
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Spacecraft Subsystems 1. Attitude and Orbit Control Subsystem (AOCS) Propulsion Subsystem 2. Propulsion Subsystem 3. Electrical Power Subsystem (EPS) 4. Communications and Data Handling Subsystem (CDHS) 5. Environmental Control and Life Support Subsystem (ECLS) 6. Structures Subsystem Joseph Baker (ECE Dept) ECE 2984: Exploration of Space Lecture 20: Structures and Mechanisms
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Structures Subsystem Joseph Baker (ECE Dept) ECE 2984: Exploration of Space Lecture 20: Structures and Mechanisms
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Structures Subsystem The “Structures Subsystem” provides a rd pport r ct re r e sturdy support structure for the spacecraft bus and payload that can withstand: 1) Stresses during launch 2) Harsh conditions while in orbit eat uring ntry 3) Heat during re entry The structures subsystem is basically the “skeleton” of the spacecraft and it is sometimes called the “Structure and Mechanisms Subsystem”. The structures subsystem is kind of like Joseph Baker (ECE Dept) ECE 2984: Exploration of Space Lecture 20: Structures and Mechanisms the “body” or “frame” of the school bus.
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Structures and Mechanisms The Structures Subsystem is a key component of the spacecraft’s ultimate quality and themission’s success. The structure needs to hold all subsystems together during the resses, rains, d brations f unch nd rbital perations stresses, strains, and vibrations of launch and orbital operations. In some cases, the entire mission may depend on a certain bolt holding or a release mechanism functioning at just the right time. The structures and mechanisms must be designed to satisfy all requirements and constraints of the payload and subsystems. e acecraft ructure d echanisms quire echanical The spacecraft structure and mechanisms require a mechanical configuration that fits all payloads and subsystems within the mass, volume and cost constraints of the overall mission. Joseph Baker (ECE Dept) ECE 2984: Exploration of Space Lecture 20: Structures and Mechanisms
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Structure Categories The spacecraft structure usually accounts for 10% to 20% of the spacecraft’s dry weight (everything except propellant) ,so it’ sa very massive part of the spacecraft. e verall ructure n e ivided to ree tegories The overall structure can be divided into three categories: 1) PRIMARY STRUCTURE : Maintains the spacecraft’s physical integrity and carries most of the loads.
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This note was uploaded on 09/19/2011 for the course ENGE 1114 taught by Professor Twknott during the Fall '06 term at Virginia Tech.

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lecture20 - ECE2984 Lecture20 JosephBaker(ECEDept...

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