WorldCat Identities

Gilyard, Glenn B.

Overview
Works: 40 works in 116 publications in 1 language and 3,399 library holdings
Roles: Author
Classifications: TL521.3.T4,
Publication Timeline
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Most widely held works by Glenn B Gilyard
Optimal pitch thrust-vector angle and benefits for all flight regimes by Glenn B Gilyard( )

5 editions published in 2000 in English and held by 310 WorldCat member libraries worldwide

The NASA Dryden Flight Research Center is exploring the optimum thrust-vector angle on aircraft. Simple aerodynamic performance models for various phases of aircraft flight are developed and optimization equations and algorithms are presented in this report. Results of optimal angles of thrust vectors and associated benefits for various flight regimes of aircraft (takeoff, climb, cruise, descent, final approach, and landing) are given. Results for a typical wide-body transport aircraft are also given. The benefits accruable for this class of aircraft are small, but the technique can be applied to other conventionally configured aircraft. The lower L/D aerodynamic characteristics of fighters generally would produce larger benefits than those produced for transport aircraft
Flight test of an adaptive configuration optimization system for transport aircraft by Glenn B Gilyard( )

4 editions published in 1999 in English and held by 309 WorldCat member libraries worldwide

Estimated benefits of variable-geometry wing camber control for transport aircraft by Alexander Bolonkin( )

5 editions published in 1999 in English and held by 308 WorldCat member libraries worldwide

Analytical benefits of variable-camber capability on subsonic transport aircraft are explored. Using aerodynamic performance models, including drag as a function of deflection angle for control surfaces of interest, optimal performance benefits of variable camber are calculated. Results demonstrate that if all wing trailing-edge surfaces are available for optimization, drag can be significantly reduced at most points within the flight envelope. The optimization approach developed and illustrated for flight uses variable camber for optimization of aerodynamic efficiency (maximizing the lift-to-drag ratio). Most transport aircraft have significant latent capability in this area. Wing camber control that can affect performance optimization for transport aircraft includes symmetric use of ailerons and flaps. In this paper, drag characteristics for aileron and flap deflections are computed based on analytical and wind-tunnel data. All calculations based on predictions for the subject aircraft and the optimal surface deflection are obtained by simple interpolation for given conditions. An algorithm is also presented for computation of optimal surface deflection for given conditions. Benefits of variable camber for a transport configuration using a simple trailing-edge control surface system can approach more than 10 percent, especially for nonstandard flight conditions. In the cruise regime, the benefit is 1-3 percent
Subsonic flight test evaluation of a propulsion system parameter estimation process for the F-100 engine by John S Orme( )

6 editions published in 1992 in English and held by 308 WorldCat member libraries worldwide

Integrated engine-airframe optimal control technology may significantly improve aircraft performance. This technology requires a reliable and accurate parameter estimator to predict unmeasured variables. To develop this technology base, NASA Dryden Flight Research Facility (Edwards, CA), McDonnell Aircraft Company (St. Louis, MO), and Pratt & Whitney (West Palm Beach, FL) have developed and flight-tested an adaptive performance seeking control system which optimizes the quasi-steady-state performance of the F-15 propulsion system. This paper presents flight and ground test evaluations of the propulsion system parameter estimation process used by the performance seeking control system. The estimator consists of a compact propulsion system model and an extended Kalman filter. The extended Kalman filter estimates five engine component deviation parameters from measured inputs. The compact model uses measurements and Kalman-filter estimates as inputs to predict unmeasured propulsion parameters such as net propulsive force and fan stall margin. The ability to track trends and estimate absolute values of propulsion system parameters was demonstrated. For example, thrust stand results show a good correlation, especially in trends, between the performance seeking control estimated and measured thrust
Integrated flight-propulsion control concepts for supersonic transport airplanes by Frank W Burcham( )

1 edition published in 1990 in English and held by 188 WorldCat member libraries worldwide

A proposed Kalman filter algorithm for estimation of unmeasured output variables for an F100 turbofan engine by Gurbux S Alag( Book )

4 editions published in 1990 in English and held by 173 WorldCat member libraries worldwide

A preliminary evaluation of an F100 engine parameter estimation process using flight data by Trindel A Maine( Book )

6 editions published in 1990 in English and held by 147 WorldCat member libraries worldwide

In-flight transport performance optimization : an experimental flight research program and an operational scenario by Glenn B Gilyard( Book )

3 editions published in 1997 in English and held by 133 WorldCat member libraries worldwide

Method for experimental determination of flutter speed by parameter identification by E Nissim( Book )

1 edition published in 1989 in English and held by 130 WorldCat member libraries worldwide

A simulation evaluation of a four-engine jet transport using engine thrust modulation for flightpath control( Book )

1 edition published in 1991 in English and held by 126 WorldCat member libraries worldwide

Flight evaluation of a pneumatic system for unsteady pressure measurements using conventional sensors by Robert E Curry( Book )

5 editions published between 1989 and 1990 in English and held by 118 WorldCat member libraries worldwide

Propulsion system/flight control integration and optimization : flight evaluation and technology transition by Frank W Burcham( Book )

4 editions published in 1990 in English and held by 112 WorldCat member libraries worldwide

Integrated flight-propulsion control concepts for supersonic transport airplanes by Frank W Burcham( Book )

1 edition published in 1990 in English and held by 102 WorldCat member libraries worldwide

Performance seeking control : program overview and future directions by Glenn B Gilyard( Book )

4 editions published in 1993 in English and held by 101 WorldCat member libraries worldwide

Subsonic flight test evaluation of a performance seeking control algorithm on an F-15 airplane by Glenn B Gilyard( Book )

5 editions published in 1992 in English and held by 100 WorldCat member libraries worldwide

Preliminary supersonic flight test evaluation of performance seeking control by John S Orme( Book )

5 editions published in 1993 in English and held by 97 WorldCat member libraries worldwide

Direct adaptive performance optimization of subsonic transports : a periodic perturbation technique by Martín Espanã( Book )

5 editions published in 1995 in English and held by 92 WorldCat member libraries worldwide

Aeroelastic control of oblique-wing aircraft by John J Burken( Book )

1 edition published in 1986 in English and held by 88 WorldCat member libraries worldwide

Ground vibration test results for drones for aerodynamic and structural testing (DAST)/aeroelastic research wing (ARW-1R) aircraft by Timothy H Cox( Book )

1 edition published in 1986 in English and held by 83 WorldCat member libraries worldwide

Results from flight and simulator studies of a Mach 3 cruise longitudinal autopilot by Glenn B Gilyard( Book )

2 editions published in 1978 in English and held by 82 WorldCat member libraries worldwide

 
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Audience Level
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Audience Level
1
  Kids General Special  
Audience level: 0.55 (from 0.47 for Integrated ... to 0.62 for Propulsion ...)

Languages
English (69)