NDLI: Neural network-based adaptive control for a supercavitating vehicle in transition phase

Content Provider	Springer Nature Link
Author	Kim, Seonhong Kim, Nakwan
Copyright Year	2014
Abstract	A supercavitation is a modern technology that can reduce the frictional resistance of an underwater vehicle. To reach supercavity, which is when the cavity envelops the entire vehicle body, a vehicle passes through the transition phase from fully wetted to supercavitating operation where unsteady hydrodynamic forces and moments are created by partial cavity. This paper presents analytical and numerical investigations into the dynamics of a supercavitating vehicle in the transition phase as well as a neural network-based adaptive control method that guarantees a stable control performance with modeling uncertainty. The ventilated cavity model is used for the rapid supercavity condition, which is when the cavitation number is relatively high. The cavity profile decides the immersion depths of the fins and body to calculate the hydrodynamical effects on the body. The supercavitating system in the transition phase is replaced by linearized pitch motion dynamics to verify the performance of the design controller. In addition, a numerical simulation shows how the proposed control method can compensate for modeling uncertainty.
Starting Page	454
Ending Page	466
Page Count	13
File Format	PDF
ISSN	09484280
Journal	Journal of Marine Science and Technology
Volume Number	20
Issue Number	3
e-ISSN	14378213
Language	English
Publisher	Springer Japan
Publisher Date	2014-11-21
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Supercavitating vehicle Transition phase Hydrodynamics Modeling Partial cavity Neural network Adaptive control Automotive Engineering Engineering Fluid Dynamics Engineering Design Offshore Engineering Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Oceanography Ocean Engineering Mechanics of Materials Mechanical Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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