This paper describes the system definition and integration approach adopted for the Bradley Fighting Vehicle (BFV) M2A3 Engineering and Manufacturing Development (EMD) program at United Defense LP. The BFV A3 Upgrade program incorporates lessons learned in the Desert Storm Operation. Upgrades are primarily in the area of fire control, electronics and software.Modern electronics and software systems are relatively complex. Subsystems have to be integrated so that they perform cohesively to implement sophisticated system functions with minimal supervision from human operators. This cohesive implementation, or system integration, requires special discipline, knowhow, facility, and organization. This paper describes a systems engineering approach that allows an understanding of the system early in the program, identifies problem areas and generates candidate solutions before commencement of system design.It also describes the advantages of this approach.The approach described was used on the BFV A3 program. A System Integration Laboratory (SIL) was constructed and a rapid prototyping methodology was adopted to generate a simulation, emulation, and stimulation (SES) early in the program to allow for a better understanding of the overall system. The SIL also created an incremental integration environment that allowed the system to be integrated using the philosophy of "build-alittle, test-a-little, and integrate-a-little" to simplify the integration tasks and reduce program risk.
This paper describes a modeling and simulation (M&S) based approach to provide life cycle support for the Bradley Fighting Vehicle (BFV) M2A3. The BFV A3 is being developed under an Engineering and Manufacturing Development (EMD) program at United Defense LP (UDLP). The BFV A3 Upgrade program incorporates lessons learned in the Desert Storm Operation. Upgrades are primarily in the area of fire control, electronics and software.
As part of the US Army Corps of Engineers’ mission to evaluate and move dredged material (DM) to maintain navigation channels, environmental evaluation of the prospective material is required by the Code of Federal Regulations. While existing guidance manuals provide useful guidance to DM regulators, they are over 30 years old and not reflective of the latest science. However, efforts to update procedures and publish the documents individually or as a combined dredging manual have been thus far unsuccessful. These issues, coupled with a lack of consistent reporting and decision documentation, lead to delays arising from challenges addressing project-specific issues not clearly covered within the existing guidance, revisiting previously resolved issues or negotiating disputes between permitting authorities. This technical report provides a path toward modernization of the environmental compliance aspects of DM evaluation guidance in part through software executables guiding the management and decision process and through a structured, evidence-based approach. The value added is an updated approach to DM testing and evaluation decisions.
Subwatershed planning, incorporating multidisciplinary input from the engineering, geotechnical, hydrogeologic, and environmental sectors, is greatly facilitated by continuous simulation techniques. This paper describes the use of the HSP-F hydrologic model applied to an urbanizing watershed in Burlington, Ontario. The conventional continuous analysis approach has been shown not to be a cost-effective means of evaluating stormwater management techniques (Best Management Practices) in subwatershed planning. Various alternative approaches have been examined to simplify this analysis, while maintaining the overall integrity of the continuous simulation philosophy. As a simplification of continuous simulation, the concept of continuous analysis has been advanced by technical agencies and the consulting community. Continuous analysis is a procedure whereby hydrographs, produced through long-tenn continuous simulation, are numerically processed using simple computational techniques (i.e. black box), external to any standard hydrologic model. Typically this procedure facilitates the functional assessment of alternate stormwater management techniques appropriate for the watershed system under analysis. The advantages and disadvantages of each approach are documented, along with an indication of computational effort.
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