Real-time digital control of optical interferometers by the mechanical-modulation technique

1994 ◽  
Vol 33 (34) ◽  
pp. 7846 ◽  
Author(s):  
Fabrizio Barone ◽  
Rosario De Rosa ◽  
Luciano Di Fiore ◽  
Francesco Fusco ◽  
Aniello Grado ◽  
...  
1995 ◽  
Author(s):  
Fabrizio Barone ◽  
Enrico Calloni ◽  
Luciano DiFiore ◽  
Aniello Grado ◽  
Leopoldo Milano ◽  
...  

2000 ◽  
Vol 33 (27) ◽  
pp. 339-344
Author(s):  
Luigi Palopoli ◽  
Luca Abeni ◽  
Fabio Conticelli ◽  
Benedetto Allotta

1989 ◽  
Vol 8 ◽  
pp. 565-566
Author(s):  
Fritz Merkle

Long baseline interferometry requires the full phasing of a telescope array. Especially for future arrays with large unit telescopes active control systems are mandatory. Adaptive optics can be applied for real-time phase compensation of the individual pupils due to atmospheric distortions. Additional to phasing of the individual pupils of independently mounted telescopes, the whole array has to be phased, including pupil position corrections due to pupil foreshortening and shift effects in order to reach a reasonable phased field-of-view.


2013 ◽  
Vol 753-755 ◽  
pp. 2329-2333
Author(s):  
Guo Jin Chen ◽  
Jing Ni ◽  
Ting Ting Liu ◽  
Hui Peng Chen ◽  
Ming Xu

Aiming at the lower automation, accuracy and efficiency of the domestic band sawing machine, this paper studies the real-time detection technology based on the sawing load, develops the digital control system of the constant power sawing with the micro-feed performance to improve the load imbalance of the band saw blades in the sawing process. The real-time detection technology based on the micro-deviation of the band saws trajectory is studied. The digitized deviation-correction control system of the band saws trajectory is developed with the fine-tuning performance of the saw stiffness to correct automatically the band saws trajectory. The weight-detection technology based on the scan reconstruction of the surface profile size is researched. The digital control system of the fixed weight sawing is developed to meet that the weight error of the sawed workpiece is fewer than 3%. That can improve the accuracy and efficiency of the band sawing machine and provide the foundation for the realization of the digital control of the band sawing machine.


1995 ◽  
Vol 32 (2) ◽  
pp. 163-178 ◽  
Author(s):  
L. Moreno ◽  
L. Acosta ◽  
J. A. MÉndez ◽  
A. Hamilton ◽  
J. Piñeiro ◽  
...  

Experiments on a d.c. motor-based system for a digital control course A set of real-time experiments is presented. These experiments are implemented on a position-velocity system and cover a wide range of control techniques. We start with basic control actions and continue with more complex strategies like optimal control. We emphasize the study of all practical aspects of the experiences: noise, delays, etc.


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