2 NASA Technical Memorandum Overview of Integrated Programs for Aerospace-Vehicle Design Robert E. Fulton kangley Research Center ampton, firginia National Aeronautics and Space Administration Scientific and Technical Information Branch
3 SUMMARY To respond to national needs for improved productivity in engineering design and manufacturing, a NASA supported joint industry/government project is underway denoted Integrated Programs for Aerospace-Vehicle Design (IPAD). The objective is to improve engineering productivity through better use of computer technology. It focuses on development of techno1 ogy and associated software for integrated company-wide management of engineering information. The project has been underway since 1976 under the guidance of an Industry Technical Advisory Board (ITAB) composed of representatives of major engineering and computer companies and in close collaboration with the Air Force Integrated Computer-Aided Manufacturing (ICAM) program. Results to date on the IPAD project include an in-depth documentation of a representative design process for a 1 arge engineering project, the definition and design of computer-aided design software needed to support that process, and the release of prototype software to integrate selected design functions. Ongoing work concentrates on development of prototype software to manage engineering information, and initial software is nearing release. This paper provides an overview of the IPAD project and summarizes goals, plans, and progress to date. INTRODUCTION The national need for improved productivity has become increasingly apparent with recent statistics of zero or negative growth in gross national product. Significant improvements in aerospace productivity are be1 i eved possible through effective utilization of current and future CAD/CAM technology (figs. 1 and 2). A joint NASA/-industry $1 5M project, Integrated Programs for Aerospace-Vehicl e Design ( IPAD), has been underway for several years and is making significant progress in advancing integrated CAD/CAM technology. The project goal is to increase U.S. aerospace industry productivity through appl ication of computers for integrated company-wide management of engineering data. In the early 1970is, NASA-funded feasibil ity studies (refs. 1 and 2) showed that dramatic increases in engineering productivity were feasible through the automation of routine information hand1 ing tasks. These results, which were extensively reviewed by the aerospace and computer industry (refs. 3 and 4), showed that such automation would directly decrease cost and flow time in the product design process and would improve the competitive position of the U.S, aerospace industry. Based on these and other results, NASA began the IPAD
4 project in 1976 to develop the appropriate technology and associated computer software. Work under the IPAD project is being done principally through a NASA prime contract to The Boeing Commercial Airplane Company supported by appropriate subcontracts and under the guidance of an Industry Technical Advisory Board (ITAB) composed of members of aerospace and computer companies (fig. 3). The ITAB concept provides an innovative and effective management approach for a joint industry/government high technology R&D effort (ref. 5)- (See Appendix A for a summary of industry i nvol vement in IPAD). IPAD software development is closely coordinated with the U.S. Air Force Integrated Computer-Aided Manufacturing (ICBM) program, and several IPADIICAM cooperative activities are underway or planned. (See, for example, refs. 6 and 7). NASA management of software development is supported by continuing independent evaluation of software performance carried out through a contract to Information Research Associates (ref. 8). While IPAD software is being developed primarily for use by the aerospace industry, it should be useful in support of other complex processes such as large civil engineering projects, shipbuilding, automotive design, electronics, and engineering education (refs. 9, 10-13). Representatives from several non-aerospace organizations serve as observers to ITAB and regularly participate in the review and critique of ongoing work (fig. 3). DEVELOPMENT PLAN A fully operational IPAD capability of the future (fig. 4) would be composed of system software including executive, data management, and geometry/ graphics software, together with disciplinary technical programs installed in IPAD to implement its integrated design features and project data. The IPAD project focuses on developing prototype system software and would use available technical programs and data for software evaluation and demonstration. It would a1 so take advantage of the capabilities of the host computer interactive operating system. Major IPAD project tasks during FY (see figs, 4 and 5) include (1) definition of a computer-aided design system of the future denoted Full IPAD; and (2) development of First-Level IPAD software principally composed of a prototype engineering data management software system operational on CDC and IBM computers supported by geometry and graphics software operational on a DEC VAX minicomputer. IPAD software development is being carried out through a careful step-by-step process encompassing aerospace design process definition, system requirements definition, software design, and software devel opment (fig. 6). The schedule in figure 5 indicates that the Full IPAD design has been completed; work is we1 1 into the CDC development with geometrylgraphics software re1 eased; data management software is nearing release; and pl anning for IBM implementation is underway. The following sections provide further details on the description of a future Full IPAD, as well as on progress and plans toward developing a First-Level IPAD software capabil ity.
5 DESCRIPTION OF A FUTURE FULL IPAD SYSTEM IPAD project results to date (see refs ) indicate that a Full IPAD system of the future should be basically a general-purpose interactive computer-aided design system developed to support engineering design processes. Its primary function would be to handle engineering data associated with the design process. IPAD software would be instal 1 ed by each company on its computers and used in a manner similar to vendor-suppl ied operating system software. The IPAD software woul d augment, rather than replace, existing operating system software. It would support the continuous design activities of a typical company mix of mu1 tip1 e development projects. The IPAD system would serve management and engineering staffs at all levels of design (conceptual, prel iminary, and final ) and aid in the assembly and organization of design data for manufacturing processes. The IPAD system would support generation, storage, and management of large quantities of data. Its capacity would only be limited by the computer hardware configurations sel ected by each company. The system would be used in a distributed computing environment having ohe or more central host computing systems and many remote computing systems. One such arrangement of Full IPAD components is given in figure 7. The number of terminal s might be several hundred or more and may be distributed across the host and remote systems. The IPAD software would function on the computer complexes in use today by aerospace corporations, but would achieve its full potential on the computers in the next decade. The functions of the three major IPAD software com~onents illustrated in figures 4 and 7 are (1) executive software to control user-directed processes through interactive interfaces with a 1 arge number of terminal s in simul taneous use by engineering and management personnel and to provide communications between computer hardware within and outside the IPAD distributed com~utina., svstem: " (2)' data management software to provide a comprehensive, versatil e capabil ; ty for efficiently storing, tracking, protecting, and retrieving exceptionally large quantities of data maintained on multiple storage devices; and (3) geometry and graphics utility software to provide a wide range of capabilities for information and geometry creation, manipulation and display. - functions incl udinq - designldrafting and interactive and display graphics. Libraries within the daf a bases might incl ude analysisldesign computer programs utilized by various disciplinary specialists and extensive quantities of data. The analysisldesign computer programs would not be part of IPAD, but would be provided by each company to form the complete design-software system; selected pub1 ical ly available technical programs might be included in IPAD releases to demonstrate capabilities. The data in the data base would include all official project information defining the characteristics of current base1 ines and a1 ternative designs and their performance, as we1 1 as archival "handbook" information forming the technology base for company designs. Simultaneous access to the same base1 ine design information by a1 1 discipl inary groups would thus be possibl e. Temporary storage for design information being actively used by individuals or teams would also be provided.
6 A Full IPAD system would not be a hands-off "automated design" system and would not constrain company design methods. The qual ity of future aerospace designs generated in an IPAD environment would depedd on the same primary factors as in today's design environment: creativity of designers, qual ity of technical staff, qual ity of analysis tools and design data, and coordination of design and manufacturing information. IPAD should also be a tool to improve manufacturing direct access to engineering data. While support for the manufacturing process is not a specific requirement for the Full IPAD system, it is believed that many manufacturing needs are met by the resulting system design. Continuing collaboration between the Air Force and NASA should insure compati bil i ty between future IPAD and ICAM capabil iti es so that manufacturing users can more readily take advantage of the design and data management features of IPAD and can have better access to design information. In summary, the key results to date in defining a future full IPAD system incl ude: 1. Comprehensive description of a future representative aerospacevehicle design process and its interface to manufacturing (fig. 8, refs ). 2. Requirements and preliminary design of a future IPAD software system denoted "Full IPAD" to integrate engineering activities of an aerospace company having several products under simultaneous development (fig. 7, refs ). FI RST-LEVEL I PAD SOFTWARE DEVELOPMENT An initial set of IPAD software denoted First-Level IPAD is now under development. This software is a meaningful subset of the Full IPAD system and, in accordance with ITAB guidance, is focusing on critical technology issues associated with managing engineering data. It provides a significant step toward development of a future integrated computer-ai-ded design capability operational on a network of computers of different manufacture. Key requirements driving software development incl ude numerous interacti ve terminal s, vol uminous quantities of data' (fig. 9), and extensive consideration of geometry (fig. 10). In progress to date, major technology issues have been addressed, design of a prototype engineering data management system compl eted, software development progressed substantially, some initial software released, and a major capabil i ty nearing release. The result has been identification and implementation of appropriate geometry/graphical software (fig. 11, ref. 25), and the design and substantial progress toward development of an innovative approach to integrated company-wide management of engineering data for a future distributed computer complex (fig. 12, refs ).
7 A1 1 IPAD techno1 ogy, software, and supporting documentation is being pplied to industry as it is developed, (See, for example, refs ). ~e software devel opment pl an provides for re1 ease of incremental capabil ities implemented for the CDC/DEC and IBM computing systems. These incremental releases will permit each company to incrementally install and evaluate the software and associated technology and, as appropriate, undertake a gradual transition from the current computing environment to a future IPAD integrated environment at a pace appropriate for the company. During the balance of 1980, work is focusing on coding the engineering data management software and developing demonstrations of integrated design/ manufacturing acti vi ti es to val i date the software and its fundamental concepts. An initial engineering data management capability will be operational in late 1980 and future development, together with demonstrations, wi 11 continue into mid Plans for 1981 and beyond are to implement the engineering data management software on a second computer of different manufacture (IBM), to enhance performance of software, to expand software to respond to manufacturing data management requirements, and to examine the technology chal lenges of computer-aided design/manufacturing on networks of computers (fig. 13). Close collaboration will be maintained with the Air Force ICAM program to insure that the joint IPADIICAM programs best respond to the combined technology needs of design and manufacturing. In summary, First-Level IPAD software produced to date or p1 anned into 1982 include: 1. Re1 ease in October 1979 of IPAD Integration Prototype Software operational on a CDC/DEC computer compl ex which integrates through an experimental relational data management system the functions of design, drafting, geometry, graphical display, structural and thermal analysis/design, and N/C path generation (fig. 11, ref. 25). 2. Release in July 1981 of a prototype instrumented engineering data management system based on a multi-schema concept which is operational on a CDC computer and provides the capability to integrate company-wide design data (fig. 12, refs ). 3. Release in July 1982 of the prototype engineering data management system operational on an IBM computer complex. 4. Continued documentation of scenarios of representative engineering design activities which serve to control software development, insure requirements are met, and serve as a basis for software demonstration.
8 APPENDIX A INDUSTRY INVOLVEMENT IN I PAD DEVELOPMENT The definition of IPAD has evolved over many years from a study and critique process that incl uded extensive aerospace industry involvement. Two in-depth studies of the feasibility and possible forms of an IPAD system were carried out by The Boeing Company and General Dynamics/Convair (see ref. 1,2). The total cost of these studies over a 17-month period was $611,000. Each study contractor undertook a careful dissection of the vehicle design process to delineate those functions and tasks that can be beneficially supported by computer hardware and software and then defined the format and elements of a software system that could substantially improve the design process. They also assessed the impact of this IPAD system on company computer hardware requirements and on the performance of company staffs and evaluated its cost and benefit potential. One company examined these questions in the context of design of three kinds of vehicles--a large subsonic transport, a supersonic transport, and a hydrofoil --and developed a comprehensive, detai 1 ed picture of the design process as a multilayered network of functions. The other examined intensively the tasks and interfaces of individual designers and groups and analyzed carefully the information flow in design. They considered the effects of the detailed constituent parts of the design process and extrapolated their experience with existing software systems to arrive at computer requirements, costs, and benefits of IPAD software. Both concluded that IPAD is feasible and will fit on existing computers. They arrived at software systems that differed in detail, but exhibited the same general characteristics and order-of-magnitude costs. Projected benefits incl uded percent time and percent cost savings in design, better management visibi 1 i ty, and reduced risk and cost resul ting from greater depth in early trade-offs, on-time designs, and fewer design changes during production. Results of these studies were presented in four oral reports that were well attended by representatives of industry; for example, 83 industry representati ves attended the final oral presentations. Fol lowing completion of the studies, the results were critiqued by teams from McDonnell Aircraft Company; Lockheed-Georgia Company; Grumman Aerospace Corporation; Roc kwell International, Los Angel es Aircraft Division; Cantroll Data Corporation; IBM Corporation; and Sperry Univac. These firms examined such questions as completeness of the studies, credibility of the proposed systems and projected development parameters, user acceptance, and government and industry roles, They expended significant effort over four months, employing 31 team members and about 100 part-time consultants. The critique reports (ref. 3) reveal a wide spectrum of views, but strong consensus that IPAD development should proceed, should not incl ude technical modules development which should remain largely the prerogative of industry, and shoul d provide early del ivery of software and user involvement. Because of the inevitable budget limitations, it was recommended that NASA limit its specific objective to production of a truncated, but "working", system.
9 Other evaluations of IPAD include an Army-funded study by McDonnell Douglas Astronautics Company of its benefit potential for missile design (ref. 4) and a small NASA-funded study by Battelle Columbus Laboratories of its potential for non-aerospace application (ref. 9). In addition, the NASA Research and Techno1 ogy Advisory Committee (RTAC) on Materials and Structures sponsored a colloquium of high-1 eve1 aerospace managers at MIT on January 30-31, 1974, at which IPAD was examined and discussed. NASA prepared an IPAD "Prospectus" in February 1975 which set forth the plan for development, initial maintenance, and re1 ease of IPAD; for an Industry Technical Advisory Board (ITAB) to advise the IPAD contractor; and for a user-controlled organization to accept maintenance responsi bil ity for IPAD software. NASA then conducted a survey of 41 aerospace companies seeking their commitment to become a member of ITAB during IPAD development; to evaluate IPAD software before it is generally released; and to financially support, in the context of a user-controll ed organization, maintenance and improvement of IPAD software after its value to their company had been demonstrated. Two messages of a general nature were apparent in the company responses. First, support for the IPAD concept and willingness to provide advice and counsel through the ITAB was very good from the 1 arge and medium airframe companies for whom IPAD would be primarily tai 1 ored. Second, most compani es prudent1 y preferred to defer hard commitments beyond ITAB participation until they had a chance to assess results. A few companies specifically declined commitments to participate in the IPAD project, and these fell in two categories - either IPAD did not appear to meet the needs of their particular design process, or they saw IPAD aimed at design problems larger than their company activity. Several such companies wished to remain informed on IPAD progress with an opportunity to re-evaluate their position later. Based on industry willingness to support the IPAD project, an Industry Technical Advisory Board (ITAB) was formed by the development contractor soon after contract initiation to afford industry the maximum opportunity for influencing the course of IPAD development. ITAB consists of members and observers representing major U.S. aerospace and computer companies and meets periodically. ITAB activities include review of planning and technical documents, critique of key developn,ent decisions, ranking of IPAD requirements, identification of demonstration programs, and evaluation of software. As the PAD software is re1 eased, ITAB member companies and other potential IPAD users will be aided in its evaluation and use. More details on ITAB ongoing operation and activities are given in reference 35.
10 REFERENCES 1. Feasibility Study of an Integrated Program for Aerospace-Vehicle Design (IPAD). NASA CR through NASA CR , Feasibility Study of an Integrated Program for Aerospace-Vehicle Design (IPAD). NASA CR through NASA CR , Industry Critiques of the Boeing and General Dynamics IPAD Feasibility Study Reports. MDC (Contract NAS ), McDonnel 1 Douglas Astronauti cs Company, Apr Rosenbaum, Jacob D.: Critique of Boeing and General Dynamics Reports on Feasibility Study of an Integrated Program for Aerospace-Vehicle Design (IPAD). Grumman Aerospace Corp., Feb. 28, Chasen, S. H.: Industry Critiques of Two IPAD Feasibility Studies. Lockheed-Georgia Co., a Division of Lockneed Aircraft Corp., Feb. 22, Czysz, Paul : IPAD Critique. McDonnel 1 Doug1 as Co., McDonnel 1 Douglas Corp., Mar. 18, Ascani, Leonard: Critique of IPAD Feasibility Studies. Los Angeles Aircraft Div., Rockwell International, Jan. 30, Feldman, Har1e.y D. : A Critique of Feasibility Studies of an IPAD system. Advanced systems Div., Control bata Corp., June Muth, Eugene: IPAD Studies Critique Report. International Business Machines Corp., Mar. 7, Wilson, William: IPAD Critique. Sperry-Univac, Mar. 26, Santa, J. E.; and Whiting, T. R.: Application of IPAD to Missile Design. NASA CR , Swanson, Warren E.: Industry Involvement in IPAD Through the Industry Technical Advisory Board. IPAD: Integrated Programs for Aerospace- Vehicle Design, NASA CP-2143, 1980, pp Schafri k, Re : ICAM Approach to Design Manufacturing Interactions. AFML paper presented at IPAD National Symposium, Denver, CO, Sept , Loshigian, Henry H.; Rachowitz, Bernard I.; and Judson, David: Manufacturing Cost/Design System: A CAD/CAM Dialog. IPAD: Integrated Programs for Aerospace-Vehicle Design; NASA CP-2143, 1980, pp
11 8. Loendorf, David; and Browne, James: An Approach to Engineering Software Design Evaluation. NASA paper presented at IPAD National Symposium, Denver, CO, Sept , A Preliminary Investigation of the Potential Application of the IPAD System to Non-Aerospace Industry. NASA CR-2603, Simek, Robert: Applied Graphics in Engineering Design. IBM paper presented at IPAD National Symposium, Denver, CO, Sept , Wozny, Michael; and Feeser, Larry: Implementation of IPAD Software in a University Environment. Rensselaer Polytechnic Institute paper presented at IPAD National Symposium, Denver, CO, Sept , Hardy, James : Integration : A Competi tive Edge. John Deere paper presented at IPAD National Symposium, Denver, CO, Sept , Blauth, Robert E. : Turnkey CAD/CAM Systems ' Integration With IPAD Systems. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp IPAD Reference Design Process, NASA CR-2981, IPAD Product Manufacture Interactions With the Design Process. NASA CR-2982, IPAD Product Program Management Systems. NASA CR-2983, IPAD Integrated Informati on Processing Requi.rements. NASA CR-2984, IPAD User Requirements. NASA CR-2985, Anderton, Gordon L.: Integration of Design Information. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp Meyer, Donald D. : Future Integrated Design Process. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp IPAD Requirements. Document D6-IPAD D. Contract NAS with Boeing Commercial Airplane Company, Dec IPAD Preliminary Design. Document D6-IPAD D. Contract NAS with Boeing Commercial Airplane Company, Dec Southall, John W.: Requirements for Company-Wide Management of Engineering Information. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp
12 ^ 24. Diggins, Ralph M. : Prel iminary Design of a Future Integrated Design System. I PAD: Integrated Programs for Aerospace-Vehicl e Design, NASA CP-2143, 1980, pp IPAD Integration Prototype Software. NASA Contract NAS with Boeing Commercial Airplane Company, Oct Tanner, J. G.; Kirkwood, D. M.; and Ives, F. M.: Executive and Communications Services to Support the IPAD Environment. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp Dube, R. Peter; Herron, Gary J.; Schweitzer, Jean E.; and Warkentine, Erich R.: An Approach for Management of Geometry Data. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp Johnson, H. R.; Comfort, D. L.; and Shull, D. D.: An Engineering Data Management System for IPAD. IPAD: Integrated Programs for Aerospace- Vehicle Design, NASA CP-2143, 1980, pp Bryant, Walter A.; and Crowell, Harold A.: User Involvement in IPAD Software Development. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp Miller, Ralph E.: IPAD Products and Implications for the Future. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp Waldrop, C. Thurman: Case Study - Lockheed-Georgia Company - Integrated Design Process. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp Owens, Herschel G. ; Mock, Wendel 1 D. ; and Mitchell, James C. : Computer- Aided Design Development Transition for IPAD Environment. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CPa2143, 1980, pp Bruce, Everett A.: Implementing an Integrated Engineering Data Base System - A Developer's Experience and the Application to IPAD. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp Nilson, Edwin N.: Integrated CAD/CAM: Problems, Prognosis, and Role of IPAD. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp Feldman, Harley D.: IPAD: A Computer Vendor's Perspective. IPAD: Integrated Programs for Aerospace-Vehicle Design, NASA CP-2143, 1980, pp
13 REDUCE ENG INEER ING TASK COST IMPROVE DES I GNER WORK ENV I RONMENT TASK COST (1980$) r-1!,:poss IBLE 100% TASKS OUT I NE CREATIVE REDUCE INCREAS 1NG COST OF DES IGN / REDUCE MANUFACTURING COST THROUGH TIMELY DES IGN AND IMPROVED DATA QUALITY DEVELOPMENT COST $ MINIMIZE MFG. Figure 1.- Benefits from CAD/CAM technology. DESIGN MFG
14 GOVERNMENT INVOLVEMENT NEEDED TO ACCELERATE DEVELOPMENT OF NEEDED CADlCAM TECHNOLOGY - H IGH R ISK LONG-TERM DEVELOPMENT OUTS I DE NORMAL AEROSPACE COMPANY PRODUCT LINE - H IGH R ISK DEVELOPMENT FOR A SMALL COMPUTER COMPANY MARKET - REQUIRES UNNATURAL COOPERATION AMONG COMPUTER VENDORS - UTILIZES SCARCE RESOURCES MORE EFFECTIVELY PROVIDES BAS lc TECHNOLOGY NEEDED FOR DOD CADlCAM PROGRAMS BENEFIT NASA MISS IONS AND PRODUCTS Figure 2.- Reasons for NASA development of CAD/CAM technology. e MEM~ERS AEROSPACE INDUSTRY BOE I NG CESSNA FA I RCH I Ul GENERAL DYNAMICS GRUMMAN LOCKHEED MARTIN-MAR1 ETTA MCDONNELL-DOUGLAS NORTHROP ROCKWELL I NTL VOUGHT ENGINE MANUFACTURERS GENERAL ELECTRIC PRATT AND WHITNEY COMPUTER MANUFACTURERS I BM CD C DEC UN IVAC I ADVANCE MARINE ENTERPRISES AVCO - LYCOMING BATTELLE BELL HELICOPTER COMPUTERV I S ION DENELCOR FORD GTE GENERAL MOTORS GERBER SCIENTIFIC INSTRUMENT GULFSTREAM AMERICAN HIGHER ORDER SOFTWARE HUGHES A1 RCRAFT MAcNEAL SCHWENDLER MANUFACTURING AND COilSULTING SERVICES NATIONAL BUREAU OF STANDARDS NAVAL AIR SYSTEMS COMMAND NASA NETWORK SYSTEMS PIPER AIRCRAFT I PRIME COMPUTER RENSSELAER POLYTECHNIC I WSTITUTE RESEARCH TRIANGLE INSTITUTE ROYAL GRAPHICS SOFTECH STRUCTURAL DYNAMICS RESEARCH TEKTRONIX " TEXAS A&M T RW UNIVERSITY OF MISSOURI-ROLLA VIRGINIA POLY, INST, AND STATE U. WESTINGHOUSE AIR FORCE - ICAM JOHN DEERE NSRDC AIR FORCE - FLIGHT DYNAMICS LAB Figure 3.- Industry technical advisory board (ITAB).
15 GOAL: IMPROVE PRODUCT l V lty THROUGH TECHNOLOGY FOR INTEGRATED, COMPANY-WI DE MANAGEMENT OF DESIGN DATA AND COMPUTER PROGRAMS KEY SOFTWARE TECHNICAL PROGRAMS (STRUCTURES, AERODYNAMICS, PERFORMANCE, PROPULS ION, TWO D IFFERENT TASKS ($15M, FY 76-81) DEFINE FULL l PAD SYSTEM OF THE FUTURE IMPLEMENT BAS ic GEOMETRY GRAPH ICS CAPAB ILlTY DEVELOP PROTOTYPE DATA MANAGEMENT SOFIWARE Figure 4. - IPAD: Integrated Programs for Aerospace-Vehicle Design.
16 I CY 76 I 77 I 78 I 79 I 80 I 81 I 82 FULL I PAD DESIGN REF DES PROC IN IT IAL I CAM REQTs GEOMl GRAPH INITIAL DM SIW DMISW SIW 1 SOFTWARE ENHANCEMENTS,: I FOLLOW ON I 1 DEVELOPMENT ( I,,,,,,--,, - CDC DEVELOPMENT LRC MINI INITIAL ACCEPTANCE DEMO I I SOFTWARE EV/LI DEMO 1 DESIGN " GO AHEAD I DING DM SIW IN IT IAL IPAD REF DES PROC REqTS,PAD p~ GEOMIGRAPH CAM INITIAL SIW SIW REQTSDMSIW CDC DM SIW IBM vv v vy7 t- I PAD SYMPOS I UM Figure 5. - IPAD developnent plan ( ).
17 QUANTIFIED DESIGN DATA CAD NEEDS 1 ESTABLISHED IPAD REQUIREMENTS \ [TEST 5 I 1 I Figure 6.- Approach to IPAD software developnent. PROCESSOR Figure HOST COMPUTER UT ll ITlES Arrangement of full IPAD system components,
19 S IMULTANEOUS USER TERMINALS LARGE. RAPID ACCESS DATA VOLUMES TO SUPPORT VEHICLE DESIGN ON LINE DATA lo9 WORDS 10 PRELIMINARY DES IGNS MINUTE AVAILAB ILlTY lo9 WORDS - 10 SUSTAINING DESIGNS DETAIL DESIGNS Figure 9.- Key IPAD performance requirements driving software design. DRAWING - INTERNAL ARRANGMEN DISCRFTF PART DESIGN.38 D IA. TOOL HOLE ';I LOCATION (OPT. ) I/- DDl~6uuu1 nntn~~nd SIC AERODYNAMIC MODEL Figure 10.- Geometry permeates the design process.
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