PIPS -Properties of Irregular Parts System.

摘要

PIPS is an Interactive Computer Graphics program for the calculation of the Properties of Irregular Parts Systems. This program uses the graphics terminal to determine the mass, weight, center of gravity, mass moments of inertia, products of inertia, principal axes and center of percussion of assemblies of irregularly shaped parts (not necessarily touching nor in the same plane) with respect to an arbitrarily selected 3-axis coordinate system. The solids may either be drawn at the graphics screen, or described and read in on punched cards, or generated by attaching (and modifying) an existing file of parts. The inputted solids may be accumulated with other solids and their combined properties calculated. PIPS was written for the CDC 6500/1700/274 facility operating under Scope 3.4.1, IGS Version 2, employing 30 overlays and 46K octal of 60 bit words of storage. The program will be rewritten for the Tektronix 40XX storage tube terminals.