An automatic -throttle compensation system has the capabilityof removing the problem of aircraft speed instability in the carrierlanding approach. Various systems have been proposed and tested, eachdiffering in input sensed variables. Two representative systems are investigatedanalytically and by the use of digital programmed Nyquistplots and analog simulations. An attempt is made to determine optimumgain constants by using various forcing functions in the analog simulation.Comparisons of the responses of the two systems are made using timehistory analog records. A digital computer stability program e applicableto any aircraft, is included. The writer wishes to express his appreciation for the assistanceand encouragement given him by Professor E.J. Andrews of the U.S.Naval Postgraduate School. Gratitude is also due Ling-Temco-VoughtIncorporated,, Specialties Incorporated and Bell Aerosystems for providingthe necessary data used in the investigation. In particular, the authorwishes to thank the Stability and Control Section, Airframe DesignDivision, of the Bureau of Naval Weapons for the valuable assistancesupplied in the form of pertinent technical reports
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