1 / 7

Systems engineering at detector level

Systems engineering at detector level. Tim Stevenson. Elements. Requirements engineering Accommodation engineering Optical Mechanical Thermal Electrical Quality engineering Verification Reliability – Risk Mitigation Serviceability Documentation Model Philosophy.

odessa
Download Presentation

Systems engineering at detector level

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Systems engineering at detector level Tim Stevenson

  2. Elements • Requirements engineering • Accommodation engineering • Optical • Mechanical • Thermal • Electrical • Quality engineering • Verification • Reliability – Risk Mitigation • Serviceability • Documentation • Model Philosophy

  3. Requirements Engineering • Science Requirements leading to: • Observatory requirements (pointing, stability, etc) • Chosen detector technology + implementation • Position and Envelope • Mass • Alignment precision • Electrical • Power • Noise environment • FE electronics • I/F to separate electronics • Thermal • Stray light • Contamination control • Mechanisms • Mission requirements • Schedule • Budget allocations • Envelope • Environment • Thermal • Mechanical • Radiation • Electrical • Attitude disturbance • Reliability • Redundancy • Life • AIV approach • Test and verification facilities • Storage, transportation

  4. Accommodation • Optical requirements and Optical packaging • Position and Volume • Vacuum vessel & door/window • Alignment approach • Protection – Door, purging • Mechanisms • Stray light control • FP technology specifics • Sealed tube? • Thermal requirements • Radiator size, proximity and attitude wrt Sun & Earth • Dissipation, detector and FEE • Isolation, detector and FEE • Electrical requirements • HT discharge precautions, power efficiency • Proximity of FEE • Relation to main electronics • Radiation protection

  5. Quality Engineering • Requirements & Design for verification • Testable at all stages • Calibratable and stable • Build quality • Traceable materials and parts of known quality • Tried and tested processes • Requirements & Design for reliability/confidence • Lessons Learnt from previous similar instruments • Redundancy where possible • Failure mode, effect and criticality analysis • Cleanliness • Self test, internal calibration, housekeeping parameters, raw data availability • Requirements & Design for serviceability • Spare parts • Access

  6. Documentation • Hierarchy of requirements • Specifications • Interface Control Documents • Plans • Procedures • Assembly • Test • Operations • Reports

  7. Detector Model Philosophy • Deliverable models • Whatever WSO/Lavotchkin requires, STM, EM & FM • Perhaps consider full FS focal plane • Development models (dev. function) • Working backwards: • Flight Model (calibration) – tested to acceptance levels • Ground engineering model (calibration, stability, troubleshooting, software development) • aka Validation Model, qualification levels in test • Breadboard model (manufacture & assembly development) • Qualification could be done on FM (Proto-flight philosophy – overdesign)

More Related