Study of selection criteria of commercial parts and equipment in the advanced space system consortium

Transcription

1 Study of selection criteria of commercial parts and equipment in the advanced space system consortium Oct. 15, 2009 Susumu Mitsuishi NEC TOSHIBA Space Systems, Ltd. Product Assurance Department 1

2 Introduction It is necessary to achieve the mission surely in the following restrictions in the small satellite or the ultra-small satellite. Decrease of development cost. Shortening of the development period. Achievement of many mission requirement. Reduction of weight and capacity. etc. Today's presentation reports the examination situation of the space application standard of COTS parts and COTS equipment in the advanced space system consortium. 2

3 The advanced space system consortium Council Consumer product manufacturer Small and mediumsized enterprise Consortium USEF Development of advanced small satellite by All Japan Space product manufacturer Sharing of result Intellectual property protection subcommittee University & Research laboratories Industrialization, Support to overseas presence METI Use of result in small satellite development Cooperation of operation etc. JAXA Standardization of network, Spread activity SpW User Creation of mission User (Government office and enterprise) 3

4 The advanced space system consortium Working Group Interface WG Network Commercial parts technology WG Selection criteria of commercial parts Selection policy of commercial equipments Reliability of commercial products Test verification Agenda Structure, thermal, and electric interface standard Automation, autonomy of satellite operation WG automation, autonomy and simplification of satellite operation operating satellites anytime and anywhere Commercial parts engineering WG member Mitsubishi Electric Corporation Mitsubishi Precision Co. Ltd. IHI Aerospace Co. Ltd. Mitsubishi Heavy Industries, Ltd. Spacelink Micro Lab JASPA Addnics MUSCAT NEC TOSHIBA Space Systems, Ltd. 4

5 The advanced space system consortium Action Schedule: FY2008: - Formulate basic policies. - Incorporate the basic policies into advanced space system design currently under development as much as possible. - Select demonstration models. FY2009: - Create reference draft. - Include the reference draft into advanced space system design, and - Develop demonstration models, and conduct ground testing. FY2010: - Draw up standards based on the results of FY

6 Result of SERVIS project 6

7 Screening requirements for PEMs PEM-INST-001 Guideline of SERVIS Testing & inspection item (Wafer lot inspection) (Pre-sealing visual inspection) Serial numbering Initial electrical performance test High-temperature baking Temperature cycle Burn-in Endpoint electrical performance test Ultrasonic microscopic inspection X-ray inspection Visual external inspection Test and inspection condition (reference) / Remarks Replace it with a test conducted by the parts maker, or with DPA. Replace it with a test conducted by the parts maker, or with DPA. (Note 1) Defined by part MIL-STD-883, Method 1008 MIL-STD-883, Method 1010, Condition B MIL-STD-883, method 1015, Condition A or D Defined by part MIL-STD-883, Method 2030 MIL-STD 883, Method 2012 MIL-STD-883, Method

8 Selection criteria of commercial parts Contents of draft version Introduction 1. Purpose 2. Reference documents 3. Definitions 4. Basic concept 5. COTS parts selection criteria (1) Definition of COTS parts (2) Environmental test condition (3) Selection criteria (4) Evaluation of COTS (5) Evaluation of risks (6) Application (7) Selection flow 6. Evaluation test 7. Reliability assurance Appendix 1: Definition The following are the characteristics specified in comparison with SERVIS evaluation guidelines. Aim to create easily understandable standards including glossaries and checklists considering that manufacturers less experienced in development of satellites and relevant parts could enter the aerospace industry. Place importance on risk evaluation. The following document is studied for the risk analysis now. RNC-CNES-Q DLR-RF-PS-004 8

9 Selection criteria of commercial parts Manufacturer to be selected Criteria of part manufacturers selection Reason Industrial parts manufacturer Manufacturer producing parts for space applications Medical parts manufacturer Automotive parts manufacturer Manufacturer who can ensure the stable supply of parts Parts manufacturer with long manufacture cycle Manufacturer who can make quick response to technical inquiry Manufacturer not to be selected Manufacturer with short manufacture cycle of one part type Manufacturer who produces many defectives Manufacturer who often changes the company name Manufacturer who cannot make quick response to technical inquiry Greatly aware of product quality Familiar with special environment in which space parts are used. Capability to supply parts without screening due to the same manufacture process. (It is possible to provide the equivalent of space-qualified parts at a low cost.) Greatly aware of product quality Greatly aware of product quality Capable of stably supply of parts with the same quality. Capable of stably supply of parts with the same quality. Parts evaluation is internally conducted in a proper manner, and documents submitted are reliable. Capable of quickly responding to trouble. It is difficult to stably supply parts. Poor product quality Reason Not clarified who is responsible and product quality is unstable Parts evaluation is not internally conducted in a proper manner, and documents submitted are not reliable. Poor response to trouble 9

10 Selection criteria of commercial parts Criteria of parts selection Parts to be selected Parts with good documents Parts with long manufacture cycle Parts that have been used in launch vehicle equipment Parts that have been used for high reliability use in bulk Parts with small variations in datasheet spec values Parts not to be selected Parts with big variations in datasheet spec values. Parts with short manufacture cycle Parts without many documents Reason Internally evaluated in a proper manner Possible to procure parts in a stable manner Unlikely to make a wrong choice of parts Unlikely to make a wrong choice of parts Small variations in parts performance High production repeatability can be ensured. Reason Big variations in parts performance. Low production repeatability Impossible to procure parts in a stable manner Highly possible that parts evaluations are not properly conducted. 10

11 Selection criteria of commercial parts A. COTS Selection START B. Check if the part has been used for space application. Has it been used in SERVIS? How about except for SERVICE? If yes, check the data, and examine if it can meet the operation requirement. C. Check if there is a commercial version of space qualified parts. Is there a difference between the part and space-qualified parts? Collect data and information Check the data and examine if it can meet the operation requirement. D. If the part hasn t been used for space application or it s not clear whether or not it has, Is it the equivalent of parts that have been used in pace? Is the internal structure clarified? Collect the information and conduct evaluation tests and others. E. Implementation of Risk Analysis Clarify the influence caused by the part failure Take measures against risks Take measures for redundancy, structure, radiation etc considering the influence on each. Flow of COTS parts Decide to use the part after confirming that it doesn t have any problems, and go to E. NG: Go to C. Decide to use the part after confirming that it doesn t have any problems, and go to E. NG: Go to D. Decide to use the part after confirming that it doesn t have any problems, and go to E. Finish after coordinating with the system side based on this result. 11

12 Selection criteria of commercial equipments Contents of draft version 1. Purpose 2. Scope 3. Reference documents 4. COTS equipment selection 4.1 Risk of COTS use 4.2 Advantage of COTS use 4.3 Risk analysis 4.4 Necessary information on COTS 5. Requirements 5.1 Resistance to environment 5.2 Used parts 5.3 Design 6. Product assurance 6.1 Evaluation test (1) Tear down (2) Radiation (3) HALT 6.2 Qualification test 6.3 Screening 6.4 Acceptance test 7. Notes in procurement As for the COTS equipment, the following design information cannot be likely to be received from manufacturers. Drawing Used parts Derating standard etc. The application of the following examination is examined as a technique for obtaining the data that equals these information. Tear down Analysis HALT 12

13 Selection criteria of commercial equipments Evaluation Method to Obtain Design Information (1) Tear Down A commercial equipment is dismantled to its PCB in order to obtain the information about the mechanism, mounting, and thermal design. The EEE parts used as well as the material used in the equipment are identified as much as possible in order to confirm that no prohibited parts and materials are used. (2) HALT Highly Accelerated Life Test (HALT) is the concept of a test to detect a potential failure or weak points of a product in a short time. What is most different from the existing endurance test (multi-environment test) is to measure the operation limit and destruction limit which are not specified in the production specification. The purpose of HALT testing is to improve the reliability and quality by extending the operation and destruction limit margins from the specification (Design Margin) and redesigning over and over again. 13

14 Selection criteria of commercial equipments Testing procedure of HALT from Kusumoto Chemicals Ltd. Cold Temperature Step Stress Rapid Temperature Cycles Combined Temperature and Vibration :31 8:40 8:43 8:46 8:49 8:52 8:55 8:58 9:01 9:04 9:07 9:10 9:13 9:16 9:19 9:22 9:25 9:28 9:31 9:34 9:37 9:40 9:43 9:46 9:49 9:52 9:55 9:58 10:01 10:04 10:07 10:10 10:13 10:16 10:19 Temperature (C) Time TC1 TC2 TC3 TC4 TC5 TC6 TC TC8 TC9 TC10 VDC11 VDC12 TC13 Hot Temperature Step Stress :22 11:26 11:31 11:36 11:41 11:47 11:52 11:57 12:03 12:08 12:13 12:19 12:24 12:29 12:34 12:40 12:45 12:50 12:56 13:01 13:06 13:12 13:17 13:22 13:27 13:33 13:38 13:43 13:49 13:54 13:59 14:05 14:10 14:15 14:20 14:26 Time TC1 TC2 TC3 TC4 TC5 TC6 TC7 TC8 TC9 TC10 VDC11 VDC12 TC13 14 Temperature (C) 16:25 14:37 14:40 14:43 14:46 14:49 14:52 14:55 14:59 15:02 15:05 15:08 15:11 15:14 15:17 15:20 15:23 15:26 15:30 15:33 15:36 15:39 15:42 15:45 15:48 15:51 15:54 15:57 16:01 16:04 16:07 16:10 16:13 16:16 16:19 16:22 Temperature (C) Time TC1 TC2 TC3 TC4 TC5 TC6 TC7 TC8 TC9 TC10 VDC11 VDC12 TC13 Vibration Step Stress Temp Setpoint Temp Product Air Vibe Setpoint 30.0 Vibe Product :09 9:13 9:18 9:23 9:28 9:33 9:38 9:43 9:48 9:53 9:57 10:02 10:07 10:12 10:17 10:32 10:37 10:42 11:32 11:36 11:41 12:09 12:14 12:19 12:41 12:45 12:50 12:55 13:00 13:05 13:18 13:23 13:28 13:32 13:37 14:12 Grms 14:22 14:25 14:28 14:31 14:35 14:38 14:41 14:44 14:47 14:51 14:54 14:57 15:00 15:03 15:07 15:10 15:13 15:16 15:19 15:23 15:26 15:29 15:32 15:35 15:39 15:42 15:59 16:02 16:06 16:12 16:15 16:18 16:21 16:24 16:28 Temperature (C) / Vibration (Grms) Time Time Temp Setpoint Temp Product Air Vibe Setpoint Vibe Product

15 Summary The Advanced Space System Consortium has just started to develop the criteria for selecting COTS parts and equipment, therefore we are examining some ideas for new quality assurance at the moment. Working Group consists of space-related manufacturers and small-and-medium-sized companies. However, space-related manufacturers are not necessarily familiar with commercial parts. The quality and reliability of commercial parts have been improved as a whole. It can be considered that this is because PC manufactures and home appliances manufacturers have carefully selected parts used for their products, and used them after fully conducting evaluations. We would like to examine their efforts to propose new criteria. 15