Accession Number:

AD0483690

Title:

APPLICATION AND EVALUATION OF CERTAIN ADAPTIVE CONTROL TECHNIQUES IN ADVANCED FLIGHT VEHICLES. VOLUME I. G. E. SELF-ADAPTIVE FLIGHT CONTROL SYSTEM

Descriptive Note:

Technical rept.

Corporate Author:

CORNELL AERONAUTICAL LAB INC BUFFALO NY

Personal Author(s):

• Schuler, John M.
• Chalk, Charles R.
• Schelhorn, Arno E.

Report Date:

1961-07-01

Pagination or Media Count:

171.0

Abstract:

The application and evaluation of certain adaptive control techniques were studied as applied to advanced vehicles of the X-15 and Dyna-Soar type. The general concept of adaptive control through the use of reference models is discussed, and particular models are evaluated based on the present status of airplane handling qualities research. The G. E. System is applied to the problem of controlling the longitudinal short-period motions of the X-15 airplane during re-entry. The first treatment of the problem is rather general, and uses essentially linear techniques to investigate the reference model concepts, selection of system parameters, responses to command inputs and gusts, effect of basic airplane static and dynamic instability, effect of sensor dynamics, and dynamics of the adaptive loop. Then a more detailed study is made of certain problem areas, including the response to inputs at the actuator valve, effect of actuator non-linearities, frequency sensor characteristics, and the effect of noise in the primary sensor, in this case a rate gyro.

Descriptors:

• *RESEARCH AIRCRAFT
• *MANNED SPACECRAFT
• STABILITY
• OPTIMIZATION
• SYSTEMS ENGINEERING
• ADAPTIVE CONTROL SYSTEMS
• PITCH(MOTION)
• ATMOSPHERE ENTRY
• DYNAMICS
• ACCELERATION
• ANGLE OF ATTACK
• NONLINEAR SYSTEMS
• RESPONSE
• FEEDBACK
• ERRORS
• GAIN
• GUSTS
• AIRSPEED
• ACTUATORS
• GYROSCOPES
• VALVES
• AIRCRAFT MODELS
• HYPERSONIC FLIGHT

Subject Categories:

• Research and Experimental Aircraft
• Manned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE