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| Schemes for Amphibious Equipment Entering Landing Ship Guidance System |
| Received:February 22, 2018 Revised:May 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.05.019 |
| KeyWord:amphibious equipment guiding acoustic signal shallow sea region propagation characteristics |
| Author | Institution |
| WU Feng |
1.Department of Equipment Support and Remanufacturing, Academy of Armored Army Forces, Beijing , China; 2.People's Armed Forces Department of Suichang County, Lishui , China |
| DING Sheng |
31606 Troops of the Chinese PLA, Hangzhou , China |
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| Abstract: |
| Objective To improve landing ability of amphibious equipment under severe sea state and dark night in allusion to low automation and incapability of being adaptive in all weather conditions. Methods The ultrasonic localization signal of landing ship was received by underwater detection device to obtain actual position of amphibious equipment, so as to avoid underwater barriers in route and improve guiding efficiency and accuracy effectively. Results Aiming at the fact that parts of the ultrasonic signal was received by underwater ultrasonic receiver, this paper studied on the effects on propagation characteristics of acoustic signal by factors of seawater, sea noise and oceanic reverberation. The seasonal sound speed profile (SSP) and acoustic transmission loss (TL) were analyzed emphatically. Mathematical modeling on reverberation level of ambient sea noise, seabed and sea level was completed. The derivation accuracy and data reliability were verified by static and dynamic tests. Conclusion Derivation of shallow sea multipath propagation signal synthesis model and double-path propagation signal degradation mode lays a foundation for solving the wave equation of propagation model. |
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