Enabling Technologies for Unified Life-Cycle Engineering of Structural Components (1991) / Chapter Skim
Currently Skimming:
8 CONCLUSIONS AND RECOMMENDATIONS
8 CONCLUSIONS AND RECOMMENDATIONS
Pages 59-70
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 59... ...
Thus, for planning purposes, a development program costing $100 to $200 million and directly supporting about 50 technical specialists should be envisaged, with impact in the near, intermediate, and long term. The actions proposed in subsequent recommendations show the scope of program needed; these have been summarized with an estimated time phasing in Figure 8-1.
|
From page 60... ...
60 RECOMMEN DATION 2 4 5 s 6 7 8 8 8 9 9 9 10 10 11 11 12 12 13 13 13 14 14 14 15 ACTIVITY Establish an ULCE Demonstrator Focus Materials Research Funding Fund Projects to Address Underlying Materials Behavior Develop an Overall Materials R&D Strategy Hold Continuing Series of ULCE Related Conferences Develop ULCE Cost Model Determine Software Requirements for PDES Develop Industry Specifications for Enhanced CAD-Cam Systems Determine Association Between Features and Performance Enhanced User Interfaces for Analysis Programs R&D for Analysis of Stochastic Systems Application of High Performance Computer Architectures to Analysis Expand Existing Reference Models to Include ULCE Identify ULCE Opportunities/Priorities Implement ULCE Model on ULCE Demonstration Project Review Applicability of Commercial Development in Entity Representation to ULCE Expand Commercial Development in Entity Representation to Satisfy ULCE Include Supportability in Design Analysis Capability Evaluate Implementation of Supportability in Design Analysis Capability Assign Engineers to Operating Bases Review Repair Data for Designer Feedback Incorporate Sensore in Prototype Component Incorporate Sensors in Production Component Improve Coupling Between Sensor Data and Model Develop an Industrial Short Course on ULCE Initiate MS LCE Programs at Universities Fund ULCE Research Centers Fund ULCE AI Techniques FIGURE 8-1 Integration strategies for action items.
|
From page 61... ...
Action Item · A major subsystem or module of a current vehicle should be identified and then redesigned, re-engineered, or remanufactured employing ULCE methods. Conclusion 3: Lead Agency ULCE requires the coordination and integration of research, development, and implementation in a variety of diverse technologies.
|
From page 62... ...
Recommendation 4: Initiate and focus on materials research and characterization appropriate to the needs of ULCE. Action Item · Materials R&D should be focused on developing lifetime prediction capabilities for generic classes of applications and materials phenomena.
|
From page 63... ...
A complete life-cycle cost methodology involves many elements, including agreement on standard terminology and procedures; a means of assessing individual component costs while recognizing system costs; quantification of difficult-to-quantify performance parameters; a system that permits initial estimates to grow naturally into detailed estimates as the design evolves, without redoing all calculations; and detailed estimates that are consistent with initial estimates but are not constrained by those initial estimates. Some of these issues must be factored into the conceptual system design, whereas others can be addressed as costs are developed and integrated into the framework of the conceptual design.
|
From page 64... ...
Recommendation 7: Accelerate the development of CAD-CAM systems that incorporate complete product descriptions material performance data and manufacturing process information as well as features-based modeling for use with product and process modelers that support producibility, reliability, serviceability, etc. Action Items ~ The development of industry standards (e.g., PDES)
|
From page 65... ...
Action Items · Development of enhanced user interfaces for analysis programs and enhanced integration of analysis data with other CAD-CAM tools should be promoted. These are not just "user-friendly" issues like common function key assignments, but new modeling methods that reduce the time, effort, and skills required to accomplish the analysis.
|
From page 66... ...
Conclusion 10: Standardized Representation Because of the distributed nature of the data required to perform the total design function within ULCE, much of the design effort will involve accessing and manipulating distributed data, incorporating the data in the design, and storing this enhanced design for later access. Because of the volume of data transfer, storage, and retrieval required, it is clear that even very small error rates could significantly affect the process.
|
From page 67... ...
Evaluation tools must be in place to permit rational design assessment at all levels. Furthermore, the results of the early analyses must be retained and used as the basis for the increasingly refined evaluation tools employed as the design evolves.
|
From page 68... ...
Their responsibilities would be to monitor failures to understand underlying defect mechanisms and to provide direct feedback to designers about repair difficulties along with suggestions to improve reliability and serviceability. · Current data and lesson-learned repositories related- to repair and serviceability should be reviewed to determine whether the data, or a subset of the data, can be restructured to provide designer feedback and, if so, whether this can be done rapidly enough and economically enough to pursue.
|
From page 69... ...
Also, the development of appropriate reliable methods for dealing with incomplete information will permit selection of new approaches on the basis of even less information and will support even more aggressive implementation of new technology. Note, however, that most of the artificial intelligence approaches to working with incomplete information are at a very early stage of development, and their implementation will require significant basic research.
|
From page 70... ...
~ Other artificial intelligence approaches should be pursued on a long-range basis.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.