AIAA 99-1317 CONTROL LAW SYNTHESIS FOR VERTICAL FIN BUFFETING ALLEVIATION (2008)
Using Strain Actuation, F. Nitzsche, D. G. Zimcik, T. G. Ryall, R. W. Moses, D. A. Henderson
In the present investigation, the results obtained during the ground test of a closed-loop control system conducted on a full-scale fighter to attenuate vertical fin buffeting response using strain...
T. G. Ryall, R. W. Moses, D. G. Zimcik, F. Nitzsche, Ka Or
High performance aircraft are, by their very nature, often required to undergo manoeuvres involving high angles of attack. Under these conditions unsteady vortices emanating from the wing and the...
Using Strain Actuation, F. Nitzsche, D. G. Zimcik, T. G. Ryall, R. W. Moses, ...
In the present investigation, the results obtained during the ground test of a closed-loop control system conducted on a full-scale fighter to attenuate vertical fin buffeting response using strain...
Flight Flutter Test Techniques at ARL (2004)
Good design of an aircraft ensures that its flutter speed lies beyond its maximum operating speed; however, modification of the aircraft, such as the attachment of external stores to the wings, can...
A Minimum Excursion-Time Control System. (2002)
A significant reduction in total test times of computer-controlled fatigue tests has been achieved by the design of a minimum excursion-time control system. The computer calculates in real time the...
The approach used here has been to obtain time-domain representations that are sums of exponentials. This, in turn, requires frequency domain approximations that are rational functions of the Laplace...
Buffet Load Alleviation (1999)
T. G. Ryall, R. W. Moses, M. A Hopkins, D. Henderson, D. G. Zimcik, F. Nitzsche, ...
High performance aircraft are, by their very nature, often required to undergo manoeuvres involving high angles of attack. Under these conditions unsteady vortices emanating from the wing and the...
Determining Stress Components from Thermoelastic Data: A Theoretical Study. (1998)
This paper presents a method for decomposing bulk stress data into individual stress components. This has applications in the field of thermoelastic stress analysis where the raw data are related...
Use of Photogrammetry to Measure a Plate Vibration Mode. (1998)
Farrell, P. A., Ryall, T. G., Emslie, Betty
Photogrammetry is used to measure the coordinates of points on the surface of three-dimensional bodies. The present report describes a preliminary experiment in the use of photogrammetry to determine...
Vibration of a Rectangular Cantilever Plate. (1998)
In preparation for an experimental evaluation of the photogrammetry technique for measuring vibration mode shapes, a cantilever steel plate was designed. This report describes the theoretical methods...
Computer Recognition and Analysis of Photogrammetric Targets. (1998)
This Technical Memorandum is a continuation of earlier work into the application of photogrammetric techniques for the modal analysis of vibrating structures. Methods are developed for the computer...