SAE AIR1823B

1 SCOPE
  1.1 Purpose
2 REFERENCES
  2.1 SAE Publications
  2.2 Other References
  2.3 Definitions
3 BACKGROUND ON COMPUTERIZED TRANSIENT ECS ANALYSIS
4 GENERAL FEATURES OF EASY
  4.1 Analysis Capabilities
  4.2 Usage Aspects
5 EASY COMPUTER PROGRAM
  5.1 History of Program
  5.2 EASY Program Capabilities
  5.3 Program Organization
      5.3.1 Model Generation Program
      5.3.2 Analysis Program
      5.3.3 File Maintenance Program
  5.4 Problem Input
      5.4.1 Model Generation Program Input
      5.4.2 Analysis Program Input
  5.5 Program Output
      5.5.1 Model Generation Program Output
      5.5.2 Analysis Program Output
  5.6 Computer System
6 LIMITATIONS AND OTHER USAGE
  6.1 Limitations
  6.2 Usage on Other Types of Systems
  6.3 EASY4, EASY5(CE), EASY5, and EASY5x
APPENDIX A - SAMPLE EASY INPUT AND OUTPUT
FIGURES
TABLES

Specifies techniques for analysis of steady-state and dynamic (transient) environmental control system (ECS) performance, control system stability, and for synthesis of optimal ECS.

The Engineering Analysis System (EASY) computer program is summarized in this report. It provides techniques for analysis of steady-state and dynamic (transient) environmental control system (ECS) performance, control system stability, and for synthesis of optimal ECS. 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. A generalized computer program for determining transient thermodynamic performance of aircraft ECS, and methods for dynamic analysis of aircraft ECS are discussed in this report.