This paper presents three approaches to assessment of configuration complexity and their applications to designing convergent SC systems. Hence, a measure of configuration complexity can be a tool for comparison and decision-making. Such alternatives often vary in associated costs and other facets including degrees of complexity. System designers usually generate alternative configurations of supply chains (SCs) by varying especially fixed assets to satisfy a desired production scope and rate.
In this alternative : configuration, the graphical lane closed sign from the MUTCD was compared with a MERGE/arrow sign on one side and a : RIGH.Ĭonfiguration complexity assessment of convergent supply chain systems This study investigated the effect of an alternative merge sign configuration within a freeway work zone. Investigation of alternative work zone merging sign configurations.ĭOT National Transportation Integrated Search Test data are presented on TAC startup and system operating performance for both configurations. The electrical control architectures are described and compared. The electrical characteristics of the two units, however, dictated the use of significantly different power conditioning and control strategies. The two alternator configurations were tested under similar thermal conditions, as an interchangeable component within the SD system. This paper highlights the operational differences (and similarities) between the Rice and PM TAC configurations including a comparative evaluation of startup characteristics and operating performance. The PM TAC was a development unit from the Joint US/Russian SD Flight Project.
The Rice alternator was part of the mini-Brayton rotating unit, designed and built during the 1970's and refurbished for the GTD.
The Brayton unit has been operated with two different turboalternator compressor (TAC) assemblies, one which included a Rice Lundell alternator and another which incorporated a permanent magnet (PM) alternator. The SD Ground Test Demonstration (GTD) system includes a solar concentrator, heat receiver with thermal energy storage, Brayton power conversion unit, and radiator installed in a thermal-vacuum chamber with a solar simulator. Espinosa, William D.Ī solar dynamic (SD) space power system has been under test at the NASA Lewis Research Center since 1994. Experimental Data for Two Different Alternator Configurations in a Solar Brayton Power System