Accession Number : ADA290179

Title :   A Prototype Lisp-Based Soft Real-Time Object-Oriented Graphical User Interface for Control System Development.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Litt, Jonathan ; Wong, Edmond ; Simon, Donald L.

PDF Url : ADA290179

Report Date : OCT 1994

Pagination or Media Count : 23

Abstract : A prototype Lisp-based soft real-time object-oriented Graphical User Interface for control system development is presented. The Graphical User Interface executes alongside a test system in laboratory conditions to permit observation of the closed loop operation through animation, graphics, and text. Since it must perform interactive graphics while updating the screen in real time, techniques are discussed which allow quick, efficient data processing and animation. Examples from an implementation are included to demonstrate some typical functionalities which allow the user to follow the control system's operation.

Descriptors :   *COMPUTER ARCHITECTURE, *INPUT OUTPUT PROCESSING, *INTERACTIVE GRAPHICS, TEST AND EVALUATION, DATA PROCESSING, CONTROL SYSTEMS, REAL TIME, INTERFACES, EFFICIENCY, USER NEEDS, OPERATING SYSTEMS(COMPUTERS), CLOSED LOOP SYSTEMS.

Subject Categories : Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE