activity report of space mechanical components & materials ... · - under the committee, space...
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Activity Report of Space Mechanical Components
& Materials Subcommittee
Toshio HONDATokyo Electronic Systems Corporation
Chairman, Space Mechanical Components & Materials Subcommittee
19th Microelectronics WorkshopOctober 26, 2006 Tsukuba, Ibaraki, JAPAN
The subcommittee memberChairman: Toshio HONDA, TokyoElectronic Systems CorporationActing chairman: Mineo SUZUKI, JAXA
External memberTsunamitsu NAKAHARA, Tokyo Institute of TechnologyToshio OGATA., National Institute for Materials ScienceKatsuhiko AKIYAMA, Mitsubishi Heavy Industries, Ltd.Hideo OGUCHI, Ishikawajima-hHarima Heavy Industries
Co., Ltd.Masao AKIYAMA, IHI Aerospace Co., Ltd.Jun NAKAGAWA, Mitsubishi Electric CorporationAkira SASAKI, NEC TOSHIBA Space Systems, Ltd.Kazuo NATORI, Mitsubishi Precision Co., Ltd.Hisashi, KAWAMURA, NSK Ltd.Yoshihide KIYOSAWA, Harmonic Drive Systems Inc.Tomio NAKATA, Tamagawa Seiki Co., Ltd.Shohachiro YAMAGUCHI, Nippon Paint Co. Ltd.
JAXA memberRikio YOKOTAAkira KONNOKenji TOMIOKAKichiro IMAGAWAKen HIGUCHIKenichi KAJIWARAShingo OBARANoritsugu KAWASHIMATakashi TAMURA
JAXA Hiroshi MIYABA, Kenichi KUSHIKI, Yasuo TANAKA, Taiichi NAGATA, Yuichi ISHIDA
High-Reliability Engineering & Components CorporationYukio AMANO, Mikihiko URANO, Mieko MATSUDA
Secretariat
1. Committee on Space Component Technology – History-(a) Establishment of the Committee- In response to serious space component problems, such as decline in domestic production, withdrawal of some components from QPL, NASDA Committee on Space Component Technology was established to seek the solution.
- Under the Committee, Space Mechanical Components & Materials Subcommitteewas set up (September 2002).
- Secretariat was Office of Research & Development- The committee issued a report based on discussion in two sub-committees. In the
report 10 item recommendations were issued (June 2003).(b) Establishment of JAXA- Upon the merge of ISAS, NAL & NASDA into JAXA, JAXA Committee on Space Component Technology was established (October 2003)
- Secretariat was Space Component Engineering Center- The subjects of the Committee extended, including ISAS & NAL activeties.(c) JAXA Vision- JAXA Vision was released (March 2005). (d) Re-organization of Institute of Aerospace Technology- R&D groups were re-organized into discipline engineering groups (October 2005)- Secretariat changed to Electronic, Mechanical Components and Materials Engineering Group.
2. Mechanical components to be developed by JAXA(1) Frontier components
Components which need innovative research to solve technologicalproblems, and to meet future space requirements.
(2) High priority componentsComponents which - have problems such as frequent failures, withdrawal from QPL, single source, ITAR, etc., and
- are required urgent development, and- are expect to be used in various applications for prolong period.
(3) Generic technologyStrategic technology which Japan should keep for steady and advanced space development. Through R&D activities, technology level will be kept, handed to next generations, and improved.
High priority components & Frontier components
•Strategic technology• Internationally competent •Contribute to higher reliability•Contribute to sustainment, succession, and progression of technological base
Technological view point
Development phase
No major research problem remained
Implementation of development (company)
• Bus equipment, crucial mission equipment (common technology)
• Break-downed from JAXA vision, and mid-term plan (Needs)
• Research output enabling unique system design (Seeds)
Usable for various applications Prolonged utilization of developed technology, and spin-off expected
Social circumstances
• Contribute to autonomous space activities• Solution to problems such as frequent failures, single source, ITAR, and high cost domestic production
Apparent advantages of research & development
Frontier components
Research phase
Solve problems through research
Applications
Development phase
Corporation with relevant organizations
Applied to projectsRemark: Gradation of in the figure shows
degree of emphasis for high priority component or frontier component
Hard research problems Limited research problems
~10 yeartime span
2~4 yeartime span
High priority components
3. JAXA vision, frontier & high priority component, generic technologyPresent After 5 year After 10 year After 15 year After 20 year
Research phase
MEMS・nano-tecnology・advanced materials ・・・
Brake-down of needed components
JAXA vision
Application of advanced commercial technology
mid-term plan mid-term plan mid-term plan
Space activity
plan
Frontier components Development
Need technological Innovation
DevelopmentResearch phase
3rd selectionHigh prioritycomponents
2nd selectionNeed urgent development
1st selection
Generictechnology
Enhance common technological base: tribology, evaluation ・・・Strategic technology
Function enhancement of Latching Valve
・Post Qualification test Review was done successfully. (August.11.2006)
・Function enhancement was accomplished in accordance with design strategy that is to take over the Pedigree design, drawings, production and inspection process.
・JAXA will carry out further evaluation tests in order to accumulate technical data.
・Now on sale!
High-priority components1st selection
Difference between Current valve and Enhanced valve
・Inheritance of Pedigree design, drawings, production and inspection process・Valve capability confirmation test (Mechanical environment, e,g, Shock, Random vibration)・Valve cost 15%OFF because of Development framework optimization
Special affairs
JAXA/Moog Japan※Development efficiency improvement
JAXA/IHI/ Moog Japan
Development Framework
GHe GN2Test fluid of Internal leakage
1.38MPa(nominal) 3.490mm2 (φ5.06mm)
Enhanced LV Unregulated2.238mm2 (φ4.90mm)
Current LV
Reverse Cracking Pressure(ID of Outer nozzle)
Item
Schedule200720062005200420032002 200720062005200420032002
PQR
Pre-study, Trade-off study
Detailed Design
QT model manufacturing (4ea)
QT
Trial manufactures and Tests
MRR
20N-class Thruster valve High-priority components1st selection
・Critical Design Review is scheduled to be held in this October. The manufacturing documents are prepared.
・In order to create a “ROBUST” valve, the Japanese methodology of quality and reliability control engineering was applied from the beginning stage of development. (TOYOTA’s design method / TAGUCHI Method with CAE)
Typical performance specification
≦ 0.30kgWeight
Confirmation of High tmp capability
Confirmation of capability
65 ohm ± 10% @20degCCoil resistance
≧ 1,000,000 cycle @Wet&DryCycle life
4 ~ 149degC @OperatingTemperature range
≦ 15msec @28Vdc,MEOP,20degC
Response(Opening)
23.5 ~ 32 VdcOperating Voltage
≦ 1×10-5scc/min @MEOP,GHeInternal leakage
≦ 0.172MPa @12.7g/sec H2OPressure drop
Test of surge pressure
7MPa / 10MPaProof/BurstPressure
2.80MPaMEOP
Remarks
N2H4,MMH,GHe,GN2,H2O,IPA
Development specificationCompatible fluid
Item
Schedule200720062005200420032002 200720062005200420032002
PQRCDR・MRRPreliminary design
Trial manufactures and tests
Detailed design
Design verification test
QT
QT valve manufacturing
EM valve manufacturing
Additional element test
High-priority components1st selectionResolver
・Post-Qualification Review & Final Revew was done successfully.
(July.24.2006)
Qualification test model
・Results of Accuracy qualification test・ Worst case is Low temp.condition (-30deg)・All data are within an accuracy
requirement (±5arcsec)・ Now on sale!
CW : Clock-wiseCCW : Counter clock-wise
JFY 2003 2004 2005 2006ReviewPreliminary designBread board modelDetailed designManufactureQualification test
PDR▼ CDR▼ PQR▼
Description Resolver Optical encoder
Outer shape Diameter
Width
Bore Diameter
125 mm
67 mm
18 mm φ
137 mm
79 mm
-
Sensing method Electromagnetic induction Optical
Angular accuracy <±0.0015°(±5arcsec) <±0.0015°(±5arcsec)
Resolution 21 bit 18 bit
Mass <2.0kg(1.82kg) <2.2kg
Power <2.6W(1.2W) <5W
Input/Output Differential type(EIA RS422) Differential type(EIA RS422)
CW
CCW
Requirement of upper limit : +5arcsec
Requirement of lower limit : -5arcsec
Angle(deg.)
Ang
le e
rror(
arcs
ec)
Harmonic Drive Gear High-priority components1st selection
・Under life testing (Long life type)
1.0E+00
1.0E+01
1.0E+02
1.0E+03
1.0E+04
1.0E+05
1.0E+06
1.0E+07
1 10 100 1000
Load Torque [Nm]
Tota
l Rev
olut
ion
Num
ber o
f Out
put S
haft
[rev
]
RequirementEM test
Estimaed Life in Vacuum
jig
Flexiblecupling
Acceleration transducerVibration test
Thermal vacuumtest
jig
– 10~ + 80℃– 30~ + 80℃– 10~ + 80℃Operating
temperature
< 30arc-sec< 60arc-sec< 30arc-secAngletransfer rate
Solid lubricantSynthetic Hydro-Carbon oil, greaseLubricant
app.105 rev.100 rev.106 rev.Lifetime
370~300g103g221gMass
70φ×35.0L70φ×14.0L82φ×30.4LDimension
Existing productLight weight typeLong life typeItem
Light weight typeLong life type
2006200520042003 2006200520042003
PQRCDRPreliminary designBBM
Detailed designQalification test
PDR
High-priority components2nd selectionComponents to be developed
Two items were selected as having high priority to be developed. Now, cooperative research is under way.
Ring
Fiberbrush
Fiberbrush type slipring
A model for preliminarylaboratory test
(1) Slipring- Research status: Evaluation is under way to
select appropriate brush, ring & plating materials- Application: Solar array drive mechanism (SADM)- Purpose: Small, light-weight SADM- Point of development: High reliability & low cost (2) Low shock hold-down & release mechanism- Research status: Preliminary operation tests wereperfomed. International cost competition is a problem. Target cost is in consideration.
- Application: Hold-down & release mechanism for Solar array paddle (SAP)
- Purpose: Reduction of release shock for SAP - Point of development: Unique mechanism & high reliability
4. JAXA’s activities on space materials
A variety of materials have been used for space applications to meet the requirements of projects. New materials are sometimes adopted. Establishment of evaluation technology about space environment for many types of space materials is important.
(1) Present major activities- Evaluation of compatibility of materials to space environment* Modified thermal control films for superior durability & higher performance* Imported electric wire sheath materials (polymers)
* Commercially available high performance paints, adhesives, etc.- Materials Database System
Obtained data are registered in a database (http://matdb.jaxa.jp)http://matdb.jaxa.jp), and open to public.
(2) Planned activities - Continue evaluation of space compatibility for imported materials- R&D for advanced new materials, such as electrically conductive thermal control polymer films, superior durability & higher performance materials.
- Improve evaluation technique, compile characteristics of materials
5. Problems related to Space Mech. Comp. & Materials Subcommittee(1) Definition of Mechanical Components
The word “mechanical component” is interpreted in several ways: (a)mechanical parts such as springs, (b)mechanical element such as ball bearings, (c)mechanisms such as flywheels. The sub-committee covers all of (a)-(c) & related basic
Due to the merge of ISAS, NAL, NASDA into JAXA, components for ISAS’sscientific satellite, and basic research at NAL became the subjects discussed in the sub-committee.
(3) Requirements for mechanical componentsNeeded future mecahnical components should be extracted from JAXA Vision. To
set the requirements for the components, system design is mandatory. This task is insufficient.
(4) Enhanced secretariatFrom October 2005, a discipline engineering groups (Electronic, Mechanical
Components and Materials Engineering Group) became secretariat. The subjects of the sub-committee is far beyond the group’s activities. Participation of related groups in the sub-committee is needed.
technology such as tribology, without clarifing the definition of “component”.
(2) Subjects of the sub-committee expanded