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Design and implementation of a computer aided test and a knowledge base/object oriented database for Space Station Freedom is discussed. Described within the paper is the design and development of “C”/SQL language software and programmable logic needed to acquire data and provide system control functions. Creation of a user interface for an intelligent report generator, a database of test anomalies with interactive alarming and an expert system for system trouble-shooting is outlined.

Design of facility Data Acquisition and Control System using Programmable Logic Controllers and Personal Computer Communications Software for use in the Environmental Control and Life Support System (ECLSS) Test Bed is discussed. Described within the paper is the selection of electrical hardware, computer software and programmable logic controllers needed to acquire data and provide control system functions. The ECLSS functions are described in reference to control parameters and the use of programmable logic controllers to make temperature, pressure and flow measurements for use in the control system functions, Due to the vast number of analog measurements it became necessary to develop an input multiplexing scheme which will be discussed along with examples of ladder logic and control logic software strategies.