_ MCR.78-517 NAS9-14593 Users' Guide May 1978 I I II --_ • III II II I[ __ II II II I I ! J Manned Maneuvering Unit {NASA-C_-I5186_) MANNED iIANF.'JVEHIHG UNIT: N79- 16553 [;SEA'S GUID[ (_artir_ Marietta Corp.) 73 p HC _0%t_ A01 CSCL 05_I Onclas 63/54 43558 MCR.78-517 Users' Contract NAS9.14593 Guide May 1978 Contract Statement of Work Item MANNED Paraglaph 3.3,2 MANEUVERING UNIT Prepared by: J, A. Ler;da Systems Projec!, Engineer Martin Marietta Approved by: ' Program Manager Martin Marietta _sch Contract Technical Monitor NASA-Johnson Space Center C, E. Whitsett Subsystem Manager NASA-Johnson Space Center MARTIN MARIETTA CORPORATION P.O. BOX 179 Denver, Colorado 80201 FOREWORD This document was prepared as part of the Manned blaneuvel;in_; U1_il: Pre]lminary De._ign Contract Lo provide ,qpplicatlons data and a capa- ]_t..lities description for orbital mission plmming and studies. Tho document was pr_l)ared by Martin Marietta Corporation m_d is submitted in accordance, with Exh:ll)lt "A", SI:atement of Work, paragraph 3,3.2 of Gontract NAS9-14593, Comments or questions concerning this document should be directed to the followln 8 per,_omle]: J. T. Josephson, Martin Marietta Aerospace--(303) 973-3000; d. A. Lenda, _Iartt.n Marietta Aerospace--(303) 973-3000; C. E. Whitsett, NASA-Johnson Space Center--(713) 683-5536. ii ABBREVIATIONS AND ACRONYMS AAH automatic att[tudc hold ASMU automa_ical].y stabilized mancuvertn_ unit CEA control electronics assembly CM center of .lass DCN dlsp]ays and controls module, of EMU AP delta pressure AV delta velocity, equiv..lent in translation EMU ex_ravehlcular mobility unit EVA extravehicular activity fps feet per second FSS flight support station GN 2 gase(,.s nitrogen kg kilograms LDEF Long Durntlon Exposure Facility blblU manned maneuw, ring unit PLSS primary life support system psi pounds per square inch RHC rotational hand controller RMS remote manipulator system (orbiter) STS Space Transportation System THC translational hand controller minimum t_me curve, translation tmi n for _flJ iii CONTENTS Foreword , . , . 0 ...... 0 .... , .... , .... il Abbreviations and Acronyms ................... iit Contents .................... , ...... iv _hru vi I ,0 INTRODUCTION ................... 1 thru 3 2.0 MMU EVA UTILITY .................... 4 thru 1.3 3.0 USER CHARGES ...................... ].4 4.0 FUNCTIONAL CAPABILITIES ................. 15 4.1 _|aneuvering Capability ............... 1.5 4.2 Work Site Aids/Anciliary Equipment ......... 16 4,3 Operational Guidelines ............... 23 and 24 5.0 OPERATING SEQUENCE ................... 25 5.1 Donning and Egress ................. 25 5,2 Flight Mode .................... 28 5.3 Ingress and Doffing ................ 28 5.4 _ Servicing ................... 29 6,0 CONSUMABLES PARAblETRICS ................. 3O 6.1 Propellant Consumption Parametries ......... 30 6,2 Power Consumption Parametrics ........... 38 6.3 App]Ication to Typical MbIU Scenarios ........ 39 thru 5O APPENDIX A--_ Technical Description ............ 51. A,I Hardware Design .................. 51 A.2 _IU Mass Properties ................ 58 iv CONTE_ffS_Continued[ A,3 _LMUMassPropurtlus ................ 58 A.4 MMU F]ight Instrumentation ............. 61. APPI<ND1X B--EVA (klldc,]tn_,s .................. 64 anO 65 APPFNI)]X C--Reference 1)oeument,_ ............... 66 Figure Space Shuttle bhmned Maneuvering Unit (I_) ....... 3 Satellite Inspection with b_lU .............. 9 Beam Builder Repair ................... 9 4 Experiment Replacement wltb _}U ............. i0 5 LI)EF Servicing with _IU ................. i0 6 _IU Carrying Small Equipment Item . , .......... i0 7 Satellite S(_rvlcing wi_h M_I .............. i0 B }_Us Transporting Beam ................. II 9 Structure Alignment Task ................ ll i0 Rescue from Unstabilized Orbiter with RNS ........ Ii ii Rescue from Unstabilized Orbiter with _ ........ i] 12 Shuttle Rescue with _IU ................. ]2 13 Skylab Reuse Mission .................. 12 14 Deploy/Retrieve Small Free-Flying Satellite with _IU , . 13 15 Cable Deployment with _ ................ 13 16 M_ Use in Assembly of Large Antennae .......... 13 17 Space Consgruction with _U ............... 13 iB B_IU Cargo Attachments - Side Grapplers ......... 17 19 _ Cargo Attachments - Front Mount ........... 18 2O Use of Soft Tether between MMU and Work Site ...... 19 21 b_tU Temporar_ Restraint System ............. 21 22 _ Arms Folded Down to Provide Access to Work Sit<, . 22 23 FSS/b_IU Locations i_ Cargo Bay with Airlock/Tunnel Adaptor ......................... 26 24 b_IU Activities at FSS .................. 27 25 Percent Fuel Consumed vs Total AV ............. 34 26 MMU Travel Time versus Distance (Cargo Weight = 0) . , 35 27 _IU Travel T_me versus Distance (Cargo Weight lO0 ibs) 36 28 Percent Fuel Consumed vs Distance (v = ]% Total Dis- max fence ................. ........ 3? CONTENTS _(Concluded I Figure (Continued) 29 Typical Orbiter Exterior Inspection Route using MMU . 41 30 MMU Translation Route for Actiw[tios at a Fixed Worksite Identified during the Inspection Phase ......... 42 31 LDEF Stahil] zatlon ................... 46 A-I MMU Functional Diagram ................. 52 A-2 Manned Maneuvering Unit ......... ........ 53 A-3 MMU Major Subsystems (i of 2) .............. 54 A-4 MMU >la_o_t Subsystems (2 of 2) .............. 55 A-5 MMU/FSS Conf_guratlon in Payload Bay .......... 57 A-6 _U Reference Coordinate System ............. -58 A-7 Typical Centers of Mass for EMU/MMU Syste;n ....... 59 A-8 AAH Limit Cycling with No Disturbance Torques ...... 6] Table MNU Flight Characteristics ............... 15 _hMU Travel Times (One Way) and Propellant Usage versus Distance and Cargo Weight ................ 32 Translation in Automatic Attitude Hold with CG Offset . 33 _IU Power Consumption Parametrics ............ 38 Typical MMU Mission Description ............. 4O Estimated Distance and Direction Change ......... 43 thru 45 7 LDEF Stabilization ................... 47 8 Multiple Mass Transfer ................. 48 9 Fuel Consumed During 5-||our EVA Task .......... 49 A-I MMU Instrumentation Controls and Displays ........ 63 vi MANNEDMANEUVERINGUNIT USERS' GUIDE.................. 1.0 INTRODUCTION The Space Shuttl_ will provide an unpr,-_cedc'nted opp<_rtunl.ty to ex- tend and enhance tho cr,:,_.,,'s inlwrent capabilities _n orbit by hi]owing them ct, operate cffttcLiveJy .tltsJdc of tho]l" spacecraft by metros of e>;travehtcu]ar ac_Lvity (EVA). For this rolv the Shuttle crew w:Ll.l, hove a llew, easter to doll add opor;it,., _;poce s_uJt ,,.,.I.th [lltt_gl';1] l[f_. suppol-t system_ and n ._;c].f-cont;_tned pv,_pu.[sive hackp;_ck (_,e Fig. I). The backpack, ca.[led the manned nmncuvering UllJ t (i_IM[!), wi 1 I nl low the crew to opt.rate beyond the' conflm, s; of thc ,Shuttie (.;)1"gn bay ,)Hid fly t¢" ;IFly part of lahe:i_r own spac<,cr;fft t,r t(, nearby f. rcc-flylng pnyl.oads or struc- ture. This i.ndcpend¢'nt lllobi.] Itv wi]l be used to ,,;upport a w:idc variety of activities /ncludi.ng fr,,c--spa,:e, tr;m:;f,,r o_- cnrgc_ nnd personnel, in- speck[on lind lllOlll.to_',[ng, of ogbiga] opel'_ti(lns_ ;_lld t'(Hl.qtrtl('t[oll add as- sembly of ],.n'ge structur_ in orbit. The ,_IU _s being developed by the Space Shuttle progrm:l office and will be available to Shuttle users as a stand;_rd service. The projected HNU support caF;d)illttes are bnsed oll the suc(:essfu] orbl. tal testa con- ducted during the Sky]ab missions a:_ port of the b1509 maneuverin_ unit c.xp_riment, and the current design was dertv.'d through an extensive l'o- search mad technology development program at the Johnson Space Center. The blNU Js operated through scp;_rnte hand controllers for inputting thu pilot's transl.ation and rotation maneuver commands to the cold gas thruster system. Other design features include automatic attitude sta- bilization, work orea lights, auxiliary poxeer outlets, and attachmen¢ pro,visions for cargo or worksitu restraints. The nmneuvering unit is stowed for launch in the forward end of the Shuttle cp, rgo bay at a flight :-upport station which i:; also used for b_iU donning/doffing and servicing on-orbit. -,TJ "_: I..'T" -,-----. ............................... .,,-r- ....... _--=- Tile purpose of _hls document _s to provide info_at_on for the poten- tial _!U user to assess the utility of th_ _ for specific applications, and to provide guidance for dev=lopin[: preliminary plans for _U opera- tions in support of those applications. Section 2.0 of this document describes several ezamples of }_U utility, and Section 3.0 dlscusses user charges. .The _ID functional and operating characteristics are pre- sented in Sectlons 4.0 and 5.0. Consumables parametrics are illustrated ifi Section 6.0. AppendS>: A provides a more detailed technical d_scriptlon of the _IU, including mass properties data. A listing of general EVA guidelines is provided for reference in Appendix B. i \ \ r_ z o 0 {-.-, "-_l "-"----_ .... " .... _..---" :/\ ,-,s_ _, /u_-- ....... ;,_ t_ "x .... i ........ /,,/ " --_ . ._- __ __.- , . "_, c_ e_ ;R ".,',__.':;__;_7.'__s ......j -_.:_-'..'-'._:.-_., _ .............. 2.0 MMU EVA UTILTTY Th_ NMU i_ provtdcd by NASA as Space: Shuttle EVA support _cluipment and is available for use by any payload on any scheduled mtssiml bc..g:in.. nlng wlth operational flights in 1981. It can be used for EVA support, orbital operation._ supp,_rt, and EVA rescue operations. Specific ta_ks which can be performed with the a:;ststan_'e of the' MNU ar_ limited only by the funct-lona] capabilities of Lhe unit and by the EVA guideltn.?s whfch apply to the STS program. Typh:a] tasles whirh the MMU cnn s,pport are listed below. Shuttle EVA S_ .... a. External inspection of the Orbiter; b. Do.numen tary phot ography/t¢, levi.st on. Payload dc.ploymcnt or retrieval; b. Adjustment of instruments; C° Retrieval and replacement of film, coatings, emulsions; d. Servicing free-flying payloads; Replacement of failed modules; f Cleaning sensors and lenses; g Assembly of large structures; h Routing of cables or lines between discontinuous points; i Application of spray coatlngs; J Removal of contamination protective covers; k.