Multivariable Control Synthesis Program - Control Aspects of the F100 Altitude Demonstration of the Multivariable Control System

摘要

This report describes the engine test demonstration phase of the F100 multivariable control synthesis program. Details of the control system design procedure and results of the hybrid simulation tests are described in AFAPL-TR-77-35, Volumes I and II. The analytical design of the F100 multivariable control system included a validation of the controller performance using a hybrid simulation. The hybrid simulation represented an 'average' F100 turbofan engine and assumed a one-dimensional flow path. Of course, real engine test hardware, which includes the engine, sensing, and control actuator hardware, will behave differently. These differences are recognized by the control designers and, prior to extensive testing at critical design points, these differences and their impact on the controller performance must be quantified. This report describes the results of the activities to determine the base line engine and sensor/actuator hardware performance. The validation of the engine reference point and trim schedules are included. An analysis of the Delta P/P (Fan exit Mach number) instrumentation, the response characteristics of the basic fuel delivery system, and the contributions due to the response rate of the test facility are presented. (Author)