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
Filter
  • AIRCRAFT STABILITY AND CONTROL  (4)
  • COMPUTER PROGRAMMING AND SOFTWARE  (1)
  • 1
    facet.materialart.
    Unknown
    Flight-determined aerodynamic derivatives of the AD-1 oblique-wing research airplane (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The AD-1 is a variable-sweep oblique-wing research airplane that exhibits unconventional stability and control characteristics. In this report, flight-determined and predicted stability and control derivatives for the AD-1 airplane are compared. The predictions are based on both wind tunnel and computational results. A final best estimate of derivatives is presented.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-TP-2222 , H-1179 , NAS 1.60:2222
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    In-flight total forces, moments and static aeroelastic characteristics of an oblique-wing research airplane (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A low-speed flight investigation has provided total force and moment coefficients and aeroelastic effects for the AD-1 oblique-wing research airplane. The results were interpreted and compared with predictions that were based on wind tunnel data. An assessment has been made of the aeroelastic wing bending design criteria. Lateral-directional trim requirements caused by asymmetry were determined. At angles of attack near stall, flow visualization indicated viscous flow separation and spanwise vortex flow. These effects were also apparent in the force and moment data.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-TP-2224 , H-1181 , NAS 1.60:2224
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Reliability analysis of an ultra-reliable fault tolerant control system (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report analyzes the reliability of NASA's Ultra-reliable Fault Tolerant Control System (UFTCS) architecture as it is currently envisioned for helicopter control. The analysis is extended to air transport and spacecraft control using the same computational and voter modules applied within the UFTCS architecture. The system reliability is calculated for several points in the helicopter, air transport, and space flight missions when there are initially 4, 5, and 6 operating channels. Sensitivity analyses are used to explore the effects of sensor failure rates and different system configurations at the 10 hour point of the helicopter mission. These analyses show that the primary limitation to system reliability is the number of flux windings on each flux summer (4 are assumed for the baseline case). Tables of system reliability at the 10 hour point are provided to allow designers to choose a configuration to meet specified reliability goals.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-CR-166594 , NAS 1.26:166594 , REPT-8404-1
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    A random search algorithm for laboratory computers (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The small laboratory computer is ideal for experimental control and data acquisition. Postexperimental data processing is often performed on large computers because of the availability of sophisticated programs, but costs and data compatibility are negative factors. Parameter optimization can be accomplished on the small computer, offering ease of programming, data compatibility, and low cost. A previously proposed random-search algorithm ('random creep') was found to be very slow in convergence. A method is proposed (the 'random leap' algorithm) which starts in a global search mode and automatically adjusts step size to speed convergence. A FORTRAN executive program for the random-leap algorithm is presented which calls a user-supplied function subroutine. An example of a function subroutine is given which calculates maximum-likelihood estimates of receiver operating-characteristic parameters from binary response data. Other applications in parameter estimation, generalized least squares, and matrix inversion are discussed.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: Behavior Research Methods and Instrumentation; 7; 4, 19; 1975
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    Flight-determined stability and control derivatives for the F-111 Tact research aircraft (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A flight investigation was conducted to provide a stability and control derivative data base for the F-111 transonic aircraft technology research aircraft. Longitudinal and lateral-directional data were obtained as functions of Mach number, angle of attack, and wing sweep. For selected derivatives, the flight results were correlated with derivatives calculated based on vehicle geometry. The validity of the angle of attack measurement was independently verified at a Mach number of 0.70 for angles of attack between 3 and 10 degrees.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-TP-1350 , H-1004
    Format: application/pdf
    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...