News
Statistics
| Number of Journals | 34 |
| Number of Issues | 1,306 |
| Number of Articles | 9,427 |
| Article View | 9,188,656 |
| PDF Download | 5,620,946 |
Investigation of the Effective Parameters of the Second Laser for Deception of Homing Laser Seeker | ||
| علوم و فناوریهای پدافند نوین | ||
| Article 2, Volume 10, Issue 2 - Serial Number 36, May 2019, Pages 131-140 PDF (1.18 M) | ||
| Document Type: Original Article | ||
| Authors | ||
| A. Eslamimajd* 1; A. Nasery1; H. Adaminejad2 | ||
| 1Maleke Ashtar University of Technology | ||
| 2موسسه آموزشی و تحقیقاتی صنایع دفاعی | ||
| Receive Date: 13 June 2018, Revise Date: 08 September 2018, Accept Date: 31 October 2018 | ||
| Abstract | ||
| Laser guidance, is one of the most common methods in guided weapons. Due to the high precision of this method and its spot-shaped collision ability, it is widely used in modern warfare. The main part of these weapons is laser seeker, which can guide the weapons to hit the target, based on the beams reflected from it. As a defensive action toward these weapons, and in order to deceive and distract the weapons route from its main paths and orientation toward the false target, a second reflective laser can be used. In this article, in order to achieve the specifications of the deceptive laser, first, the behavior of laser-guided weapons detector is simulated, then the detector testing system is designed and implemented. Based on simulations and tests, information on the dimensions, power, and time of laser beam decoding was obtained as follows. Changing the laser beam's dimensions of deception relative to the main beam has no effect on the detector's performance. To deceive the laser-guided weapon detector, only the laser beam power should increase the deception to the original laser beam.The more the laser beam decrypts in the early stages of the attack, the more likely it is to deception the operation. In the case where the power of the main beam and the deception beam is equal, the total deviation of the detector depends on the average deviation of each of the beams. If the laser beam's ratio of deception to the original laser beam is tripled, the detector will be more affected by the deception laser. 1- Changing the dimension of the deception spot rather than that of main spot has no effect on the performance of the detector.2-In order to deceive the laser- guided missile detector, the power of deception spot should only increase with the power of the main spot.3-If sending the deception spot takes place in the early stages of the attack, the deception operation is more likely to succeed. 4-In case the power of the main spot and deception are equal, the total deviation of the detector depends on the average deviation of each of the spots relative to the detector center. 5- If the power of deception spot is more than three times as much as that of the main spot, the detector is further affected by the deception spot. | ||
| Keywords | ||
| Laser Defense; Laser-guided missile; Laser seeker; four-part detector; Four quadrant detector tester | ||
| References | ||
|
[1] McCarthy, P. L. ”Projectile Guidance System Including a Compact Semi-Active Laser Seeker With Immersed Filter Stack and Field Lens”; US Patent 20110089286, 2010.## [2] Jenkins, D. G.; Taylor, B. B. “Methods and Apparatus for Guidance Systems”; US Patent 7530528, 2008.## [3] Wotton, J. R. “Laser Warning System and Methods”; US Patent 234349, 2003.## [4] Williams, D. S. “Absolute Time Encoded Semi-Active Laser Designation”; US Patent 78817, 2009.## [5] Yanhai, Y. “The Design of Echo Spot and Optical Focusing in Automatic Laser Tracking”; Optics and Laser Technol. 1986, 18, 75-79.## [6] Mohammadi, M. M.; Ghanei, H. “Laser Weapon Disruption Techniques“; http:// www.Military.ir (In Persian).## [7] Jin-Hua Chai Ning Liu “New Twelve-Quadrant Photoelectric Detection Scheme of Eliminating the Influence of Jamming Spot on Laser Guidance”; Proc. of SPIE, 2009, 7382.## [8] Makynen, A. J.; Kostamovaara, R. M. “Displacement Sensing Resolution of Position-Sensitive Detector Atmospheric Turbulence Using Retro Reflected Beam”; IEEE Trans. Instrumentation and Measurement 1997, 46, 1133-1136.## [9] Salmanpour, A.; Mohammad Nejad, Sh. “The Performance Improvement of the Target Position Determining System in Laser Tracking Based on 4Q Detector Using Neural Network”; World Academy of Science, Engineering and Technology, 2011, 56, 8-29.## [10] Amakynen, J.; Kostamovaara Myllyla, R. “Positioning Resolution of Position-Sensitive Detectors in High Background Illumination”; IEEE Trans. Instrumentation and Measurement 1996, 45, 324 – 326.## [11] Oliyaei, S.; Rezazade, M. “Optical Detector Linearization of Four-Part Positioning Using RBF and MLP Neural Networks”; Electronics Industries 2010, 65-76 (In Persian).## [12] Akkal, E. “Control Actuation Systems and Seeker Units of an Air-to-Surface Guided Munitions”; M.S. Thesis, Department of Electrical and Electronics Engineering, Middle East Technical University, 2003.## [13] Liu, N.; Chai J. H. “Dual Spots Detection Algorithm of Four-Quadrant Laser Guidance”; Infrared and Laser Engineering, 2010, 4, 013.## [14] Luciana P. S.; Davies W. L. M. “Designing the Response of an Optical Quad-Cell as Position-Sensitive Detector”; IEEE Sensors Journal 2010, 10, 286 - 293.## [15] Eslami Majd, A.; Naseri, A.; Masoumian, A.; Nasrollahi, M. R. “Design and Implementation of a Tester System for Laser Warning System “; Adv. Defence Sci. & Technol. 2016, 6, 107-117 (In Persian).## | ||
|
Statistics Article View: 713 PDF Download: 536 |
||