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Spacecraft Systems Engineering > Systems > Flashcards

Systems Flashcards

0
Q

What is Systems Engineering?

A

Systems Engineering is an interdisciplinary approach and means to enable the production of robust systems, on-time and on-budget

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1
Q

What is a System?

A

A system is a set of interrelated subsystems and components which interact with one another in an organized fashion toward a common purpose.

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2
Q

What are the four main groups a systems engineer interacts with?

A

Management, Product Assurance, Operations & Logistics, Production

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3
Q

What is the purpose of the ECSS (European Commission for Space Standardisation)?

A

ECSS provides baseline working practices for systems engineering in line with eSA/EU/industry requirements and recommendations

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4
Q

Sequential vs Centralised vs Concurrent Design

A

Sequential goes from on person to the next in sequence.
Centralised has people communicating to a manager in the center, but not to one another.
Concurrent has all teams communicating to everyone.

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5
Q

What is phase 0 in a project lifecycle?

A

Pre-Phase A

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6
Q

What is Phase A in a project lifecycle?

A

Feasibility

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7
Q

What is Phase B in a project lifecycle?

A

Preliminary Definition

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8
Q

What is Phase C in a project lifecycle?

A

Detailed Definition

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9
Q

What is Phase D in a project lifecycle?

A

Production

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10
Q

What is Phase E in a project lifecycle?

A

Utilization

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11
Q

What is Phase F in a project lifecycle?

A

Disposal

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12
Q

What are the 9 types of mission requirements?

A

Functional, Configurational, Interfaces, Physical, Evironmental, Quality Factors, Operation, Support, Verification

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13
Q

Level 1 of the System Specification flow?

A

System

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14
Q

Level 2 of the System Specification flow?

A

Subsystem

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15
Q

Level 3 of the System Specification flow?

A

Set

16
Q

Level 4 of the System Specification flow?

A

Equipment or SW product

17
Q

Level 5 of the System Specification flow?

A

Assembly

18
Q

List the four types of requirement verification:

A

Test, Analysis, Review of Design (ROD), Inspection

19
Q

Where is the bulk of money spent during the system development process?

A

Design and Development

20
Q

Why are there cost overruns?

A

Cost overruns are caused by unrealistic technology readiness assumptions and underbidding in order to win projects. Can be minimised by a thorough project definition.

21
Q

Describe the procurement ā€˜Vā€™ Process in flowing designs then feeding back hardware

A

Project initiator (MDR), Top level customer (PRR/SRR/PDR), 1st, 2nd, 3rd, etc. customer (PDRs), reverse order suppliers (CDR/QR/AR), System Operator (CRR)

22
Q

What is an MDR?

A

Mission Design Review

23
Q

What is a PRR?

A

Preliminary Requirements Review

24
Q

What is a SRR?

A

Systems Requirements Review

25
Q

What is a PDR?

A

Preliminary Design Review

26
Q

What is a CDR?

A

Critical Design Review

27
Q

What is a QR?

A

Qualification Review

28
Q

What is an AR?

A

Acceptance Review

29
Q

What is a CRR?

A

Cutover Readiness Review

30
Q

State four types of hardware models in hardware qualification philosophy which may be built in a development program prior to the final fight models.

A

Programmatic Constraints, Integration & Test Programme, Development Status, Verification Strategies

31
Q

What are Programmatic Constraints?

A

Schedule/Cost, Industrial Architecture, Reviews, Interfaces

32
Q

What is included under Integration & Test Programme

A

Test Requirements, Test sequences, Test configurations, Test facilities

33
Q

What contributes to Development Status?

A

New Technologies, Design Qualifications, Heritage, Potential Suppliers

34
Q

What Verification Strategies are taken into consideration in a development programme?

A

Requirements categories, verification methods, verification levels, verification phases.

35
Q

In order, Describe the potential tests and ECSS test sequence which a system/subsystem would have to go through during a typical qualification test.

A

Physical properties, humidity, leak, pressure, leak, acceleration, sinusoidal vibration: (Random Vibration & Accoustic), Shock, Leak, Corona and arcing, Thermal cycling, Thermal Vacuum, Leak, EMC/ESD, Life, Microgravity, Audible noise

Spacecraft Systems Engineering (4 decks)

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