The Environmental Control Analysis SYstem (EASY) computer program is summarized in this report. Development of this computer program initially was sponsored by the U.S. Air Force Flight Dynamics Laboratory. (See References 1, 2, 3, and 4.) It provides techniques for determination of steady state and dynamic (transient) ECS performance, and of control system stability; and for synthesis of optimal ECS control systems. The program is available from the U.S. Air Force, or as a proprietary commercial version. General uses of a transient analysis computer program for ECS design and development, and general features of EASY relative to these uses, are presented. This report summarizes the nine analysis options of EASY, EASY program organization for analyzing ECS, data input to the program and resulting data output, and a discussion of EASY limitations. Appendices provide general definitions for dynamic analysis, and samples of input and output for EASY.
SAE AIR1823-2011 history
2011SAE AIR1823B-2011 Engineering Analysis System (EASY) Computer Program for Dynamic Analysis of Aircraft ECS
2011SAE AIR1823-2011 ENVIRONMENTAL CONTROL SYSTEM TRANSIENT ANALYSIS COMPUTER PROGRAM (EASY)
2003SAE AIR1823A-2003 Engineering Analysis System (EASY) Computer Program for Dynamic Analysis of Aircraft ECS
1996SAE AIR1823A-1996 (R) Engineering Analysis System (EASY) Computer Program for Dynamic Analysis of Aircraft ECS