scholarly journals Free running VCO based on an unstable transistor circuit system stability optimization under delayed electromagnetic interferences and parasitic effects and engineering applications

2019 ◽  
Vol 7 (3) ◽  
Author(s):  
Ofer Aluf .
Keyword(s):  
System Stability ◽  
Engineering Applications ◽  
Free Running ◽  
Parasitic Effects ◽  
Transistor Circuit

Strapdown Optical Seeker Guidance Instructions Extraction and System Stability

2013 ◽  
Vol 397-400 ◽  
pp. 1357-1361
Author(s):  
Yue Zhang
Keyword(s):  
Optical Imaging ◽  
Angular Rate ◽  
Extraction Methods ◽  
Stability Control ◽  
Scale Factor ◽  
System Stability ◽  
Line Of Sight ◽  
Full Field ◽  
Free Running ◽  
Definition Of

In order to realize the guidance and control of the flight system, we focused on the study of different guidance instructions extraction methods and system stability control problems with respect to the characteristics of full-strapdown optical imaging seeker. First, we established the model of strapdown optical imaging seeker and introduced the definition of scale factor and the theoretical compute formula. Then the full field of view accuracy of full-strapdown optical imaging seeker was gained through the experiment and the validity of the scale factor definition has been tested and verified. Finally, we analyzed the system stabilities of different guidance instructions extraction methods. The results showed that if we applied the line of sight angular rate (LOS angular rate) to the system, the scale factor error was 5% when the free-running frequency of the overload autopilot was 20rad/s, and the scale factor error was 8.4% when the free-running frequency was 10rad/s. And if we applied the line of sight angle (LOS angle) to the system, the scale factor error was 33.3%, irrelevant to the free-running frequency. This analysis laid a foundation of guidance application..

One-Equation Turbulence Modelling for Atmospheric and Engineering Applications

2004 ◽  
Vol 113 (3) ◽  
pp. 321-346
Author(s):  
A. Venetsanos ◽  
J. Bartzis ◽  
S. Andronopoulos
Keyword(s):  
Turbulence Modelling ◽  
Engineering Applications

Engineering applications of the rodolite

1963 ◽  
Vol 42 (8) ◽  
pp. 462
Author(s):  
R.J. Tillen
Keyword(s):  
Engineering Applications
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