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Conceptual Design Review

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Conceptual Design Review Design Requirements The Systems Perspective Rob Hubbard Systems Engineering The Flow-Down Process The Flow-Down Process Getting to a Concept ... – PowerPoint PPT presentation

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Title: Conceptual Design Review


1
Conceptual Design Review
  • Design Requirements
  • The Systems Perspective
  • Rob Hubbard
  • Systems Engineering

2
The Flow-Down Process
ATST Science Requirements
Design Requirements
3
The Flow-Down Process
ATST Science Requirements
Functional and Performance Requirements
Strawman Concepts
Design Requirements
4
Getting to a Concept Input
Obvious Constraints
Work Shops
Experience with Similar Telescopes
Funded Studies
Strawman Concepts
Trade Studies
Engineering Analysis
Baseline Telescope Concept
5
Getting to a Concept Ideas
6
Testing the Concept
Performance Evaluation
No
Error Budgets
Design and Development of Systems and Subsystems
OK? (CoDR)
Science Requirements
Strawman Concept
Sub-System Specs, Design Requirements
Cost Evaluation
Yes
PDR Phase
  • Conceptual Design Review
  • What passes this test?
  • What work remains?

7
Some Hard Constraints from the SRD
  • Resolution, photon flux and sensitivity require a
    four-meter class telescope.
  • Resolution requirement also leads to a high-order
    adaptive optics system.
  • Wavelength coverage from 0.3 to 28 ?m leads to an
    all-reflecting telescope.

8
Some Challenging Requirements
  • Resolution Requirement (Image Quality)
  • Even with a 4-meter aperture, a world-class site,
    high-order AO system, this remains challenging.
  • Stray Light Requirement (Coronal Observations)
  • Polarization Requirement (Polarimetry)

9
Design Requirements Documents
  • M1 Mirror Assembly
  • SPEC-0007 (Ron Price)
  • M2 Mirror Assembly
  • SPEC-0008 (Ron Price)
  • Enclosure
  • SPEC-0010 (Mark Warner)
  • Telescope Mount Assembly
  • SPEC-0011 (Mark Warner)

10
The Systems Approach
  • The diverse and sometimes competing requirements
    placed on ATST forces a rigorous and aggressive
    systems approach during all phases of the project.

11
ATST Systems
ATST Systems Orientation
12
Responsibilities of Systems Engineering
  • Design Requirements Flow Down
  • Document and Drawing Control
  • Interface Control
  • Error Budgets
  • Standards
  • End-to-End Modeling
  • Quality Assurance Plan
  • Acceptance Test Plans
  • Integration Plan

13
Responsibilities of Systems Engineering CoDR
Emphasis
  • Design Requirements Flow Down
  • Document and Drawing Control
  • Interface Control
  • Error Budgets
  • Standards
  • End-to-End Modeling
  • Quality Assurance Plan
  • Acceptance Test Plans
  • Integration Plan

14
Systems Overview
  • Telescope Systems and Subsystems Definition
  • Interface Control and the N2 Diagram
  • Documentation Control
  • Error Budgets Top Down
  • Error Budgets Bottom Up

15
Glossary and Acronym List
16
Document and Drawing Control
17
Interface Control and the N2 Diagram
18
N2 Diagram Detail
19
Top Level Systems
  • 1.0 Telescope Assembly
  • 2.0 Adaptive Optics
  • 3.0 Instrument Systems
  • 4.0 High-Level Controls and Software
  • 5.0 Enclosure
  • 6.0 Support Facility and Buildings

20
Telescope Assembly Subsystems
  • 1.1 Telescope Mount Assembly
  • 1.2 M1 Assembly
  • 1.3 M2 Assembly
  • 1.4 Feed Optics
  • 1.5 Thermal Systems
  • 1.6 Scattered Light Control
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