ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Multivariable synthesis with inverses (1985)
    In:  CASI
    Details
    Publication Date: 2004-12-03
    Keywords: ENGINEERING (GENERAL)
    Type: Alternatives for Jet Eng. Control. Vol. 1; p 129-134
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Simplified simulation models for control studies of turbojet engines (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The essential dynamical characteristics of a simple single spool turbojet engine were determined through simulation of low order system models on an analog computer. An accurate model was studied and system complexity was reduced through various linearizations and approximations. A derivation of a seventh order simplified simulation model is presented with a derivation of an even simpler third order model, and simulation results from each. The control problem studied is one of getting from zero fuel flow equilibrium to a high thrust equilibrium while taking into account surge margin and turbine inlet temperature constraints.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-149107 , EE-757
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Alternatives for jet engine control (1978)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: General goals of the research were classified into two categories. The first category involves the use of modern multivariable frequency domain methods for control of engine models in the neighborhood of a quiescent point. The second category involves the use of nonlinear modelling and optimization techniques for control of engine models over a more extensive part of the flight envelope. In the frequency domain category, works were published in the areas of low-interaction design, polynomial design, and multiple setpoint studies. A number of these ideas progressed to the point at which they are starting to attract practical interest. In the nonlinear category, advances were made both in engine modelling and in the details associated with software for determination of time optimal controls. Nonlinear models for a two spool turbofan engine were expanded and refined; and a promising new approach to automatic model generation was placed under study. A two time scale scheme was developed to do two-dimensional dynamic programming, and an outward spiral sweep technique has greatly speeded convergence times in time optimal calculations.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-157578
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Alternative methods for the design of jet engine control systems (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Various alternatives to linear quadratic design methods for jet engine control systems are discussed. The main alternatives are classified into two broad categories: nonlinear global mathematical programming methods and linear local multivariable frequency domain methods. Specific studies within these categories include model reduction, the eigenvalue locus method, the inverse Nyquist method, polynomial design, dynamic programming, and conjugate gradient approaches.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: Joint Automatic Control Conference on Productivity; Jul 27, 1976 - Jul 30, 1976; West Lafayette, IN
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    Computational alternatives to obtain time optimal jet engine control (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Two computational methods to determine an open loop time optimal control sequence for a simple single spool turbojet engine are described by a set of nonlinear differential equations. Both methods are modifications of widely accepted algorithms which can solve fixed time unconstrained optimal control problems with a free right end. Constrained problems to be considered have fixed right ends and free time. Dynamic programming is defined on a standard problem and it yields a successive approximation solution to the time optimal problem of interest. A feedback control law is obtained and it is then used to determine the corresponding open loop control sequence. The Fletcher-Reeves conjugate gradient method has been selected for adaptation to solve a nonlinear optimal control problem with state variable and control constraints.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-149106 , EE-7611
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unknown
    Alternatives for Jet Engine Control (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: Approaches are developed as alternatives to current design methods which rely heavily on linear quadratic and Riccati equation methods. The main alternatives are discussed in two broad categories, local multivariable frequency domain methods and global nonlinear optimal methods.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-146531
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unknown
    Hierarchy of simulation models for a turbofan gas engine (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Steady-state and transient performance of an F-100-like turbofan gas engine are modeled by a computer program, DYNGEN, developed by NASA. The model employs block data maps and includes about 25 states. Low-order nonlinear analytical and linear techniques are described in terms of their application to the model. Experimental comparisons illustrating the accuracy of each model are presented.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: Annual Pittsburgh Conference; Apr 21, 1977 - Apr 22, 1977; Pittsburgh, PA
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unknown
    Computational methods to obtain time optimal jet engine control (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Dynamic Programming and the Fletcher-Reeves Conjugate Gradient Method are two existing methods which can be applied to solve a general class of unconstrained fixed time, free right end optimal control problems. New techniques are developed to adapt these methods to solve a time optimal control problem with state variable and control constraints. Specifically, they are applied to compute a time optimal control for a jet engine control problem.
    Keywords: CYBERNETICS
    Type: Annual Allerton Conference on Circuit and System Theory; Sep 29, 1976 - Oct 01, 1976; Monticello, IL
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...