A DMAP Program for the Selection of Accelerometer Locations in MSC/NASTRAN

Content Provider	Semantic Scholar
Author	Peck, Jeffrey N. Torres, Isaías
Copyright Year	2004
Abstract	A new program for selecting sensor locations has been written in the DMAP (Direct Matrix Abstraction Program) language of MSC/NASTRAN. The program implements the method of Effective Independence for selecting sensor locations, and is executed within a single NASTRAN analysis as a “rigid format alter” to the normal modes solution sequence (SOL 103). The user of the program is able to choose among various analysis options using Case Control and Bulk Data entries. Algorithms tailored for the placement of both uni-axial and triaxial accelerometers are available, as well as several options for including the model's mass distribution into the calculations. Target modes for the Effective Independence analysis are selected from the MSC/NASTRAN ASET modes calculated by the “SOL 103” solution sequence. The initial candidate sensor set is also under user control, and is selected from the ASET degrees of freedom. Analysis results are printed to the MSC/NASTRAN output file (*.f06), and may include the current candidate sensors set, and their associated Effective Independence distribution, at user specified iteration intervals. At the conclusion of the analysis, the model is reduced to the final sensor set, and frequencies and orthogonality checks are printed. Example results are given for a pre-test analysis of NASA's five-segment solid rocket booster modal test.
File Format	PDF HTM / HTML
DOI	10.2514/6.2004-1530
Alternate Webpage(s)	https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20040075658.pdf
Alternate Webpage(s)	https://doi.org/10.2514/6.2004-1530
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article