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A Method for Predicting the Stability in Roll of Automatically Controlled Aircraft Based on the Experimental Determination of the Characteristics of an Automatic Pilot
A method is suggested for predicting the stability of automatically controlled aircraft by a comparison of calculated frequency-response curves for the aircraft and experimentally determined frequency-response curves for the automatic pilot. The method is applied only to stabilization in roll. The method is expected to be useful as a means of establishing the specifications of the performance required of the automatic control devices for pilotless aircraft designed as missiles.
A Theoretical Method of Determining the Control Gearing and Time Lag Necessary for a Specified Damping of an Aircraft Equipped with a Constant-time-lag Autopilot
A method is presented for determining the control gearing and time lag necessary for determining a specified damping of the motions of an aircraft equipped with an autopilot having a constant-time-lag characteristics. The method is applied to a typical present-day airplane equipped with an autopilot sensitive to yawing acceleration. The types of motion predicted for this airplane-autopilot system by this method are compared with motions calculated by a step-by-step procedure.
Is it on Autopilot?
Written by an airline pilot, this book explains to the reader how aeroplanes fly, how air space and air traffic control work, and all the technical detail behind airliners and aviation in the 1990s.
The Theoretical Lateral Motions of an Automatically Controlled Airplane Subjected to a Yawing-moment Disturbance
The lateral motion resulting from a disturbance of the type produced by asymmetric loss of thrust has been determined for a hypothetical average airplane equipped with an automatic pilot. Plots of the resultant motion and the various modes that constitute the motion are presented for controls fixed and for various amounts of automatic control. The automatic control is assumed to be of a type that produces aileron deflections proportional to the angle of bank and rudder deflections proportional to the angle of azimuth. The use of an automatic control may introduce either of two modes. The first mode is primarily a rolling oscillation; the second is a poorly damped long-period oscillation in azimuth and bank . The motion following any change in trim causes the airplane to reach a state of equilibrium on a different flight heading from that existing before the disturbance and the airplane assumes a new flight attitude.
Automatic Flight Control
This is an updated edition of the well-known introduction to the principles involved in the automatic flight of fixed-wing and rotary wing aircraft. The principles are related to the systems used in the representative types of aircraft (UK and US) currently in service.
A Survey of Stability Analysis Techniques for Automatically Controlled Aircraft
A survey of the stability analysis techniques for automatically controlled aircraft is presented. The survey is limited to techniques commonly applied to linear, continuous-control systems wherein the difference between the output and input quantities is measured continuously and is used in the operation of the system (a closed-loop system). An evaluation of the techniques, based on the kind and amount of information derivable, is included. An illustrative example is also presented to demonstrate the calculations involved for a typical aircraft-autopilot combination.
Automatic Control of Aircraft and Missiles
This Second Edition continues the fine tradition of its predecessor by exploring the various automatic control systems in aircraft and on board missiles. Considerably expanded and updated, it now includes new or additional material on: the effectiveness of beta-beta feedback as a method of obtaining coordination during turns using the F-15 as the aircraft model; the root locus analysis of a generic acceleration autopilot used in many air-to-air and surface-to-air guided missiles; the guidance systems of the AIM-9L Sidewinder as well as bank-to-turn missiles; various types of guidance, including proportional navigation and line-of-sight and lead-angle command guidance; the coupling of the output of a director fire control system into the autopilot; the analysis of multivariable control systems; and methods for modeling the human pilot, plus the integration of the human pilot into an aircraft flight control system. Also features many new additions to the appendices.
Automatic Flight Control
This book provides an introduction to the pinciples of automatic flight of fixed-wing and rotary wing aircraft. Representative types of aircraft (UK and US) are used to show how these principles are applied in their systems. The revised edition includes new material on automatic flight control systems and helicopters.
