Results 91 to 100 of about 271 (131)
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Dynamics and Control of Supercavitating Vehicles
Journal of Dynamic Systems, Measurement, and Control, 2008Analytical and numerical investigations into the dynamics and control of dive-plane dynamics of supercavitating vehicles are presented. Dominant nonlinearities associated with planing forces are taken into account in the model. Two controllers are proposed to realize stable inner-loop dynamics, a linear state feedback control scheme and a switching ...
Guojian Lin +2 more
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Control Strategies For Supercavitating Vehicles
Journal of Vibration and Control, 2002Supercavitating bodies can achieve very high speeds under water by virtue of reduced drag: with proper design, a cavitation bubble is generated at the nose and skin friction drag is drastically reduced. Depending on the type of supercavitating vehicle under consideration, the overall drag coefficient can be an order of magnitude less than that of a ...
Kirschner, Ivan N. +4 more
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Planing avoidance control for supercavitating vehicles
2014 American Control Conference, 2014Underwater vehicles traveling inside a bubble or supercavity enable the reduction of drag and increase of speed; however, planing forces generated when the vehicle aft end pierces the bubble can lead to oscillatory motion and instability. In this paper, a framework for the synthesis of planing avoidance controllers is presented and the trade-off ...
David Escobar Sanabria +2 more
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Nonlinear Control Design for a Supercavitating Vehicle
IEEE Transactions on Control Systems Technology, 2009Supercavitating vehicles can achieve very high speed but also pose technical challenges in system stability, maneuvering, and control. Compared to a fully-wetted vehicle for which substantial lift is generated due to vortex shedding off the hull, a supercavitating vehicle is enveloped by gas surface (cavity) and thus the lift is provided by control ...
Xiaofeng Mao, Qian Wang 0029
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Nonlinear Dynamics and Control of Time-Delay Supercavitating Vehicle
International Journal of Bifurcation and Chaos, 2022This paper investigates the nonlinear dynamical behaviors of a time-delayed supercavitating vehicle system varying with the system parameters, and proposes control strategies to stabilize the trajectory. A simplified dynamical model of the supercavitating vehicle is firstly constructed and then analyzed on its local and global stability in terms of ...
Xue Bai 0001, Qinglong Li, Ming Xu 0003
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Bifurcation Behavior of a Supercavitating Vehicle
Applied Mechanics, 2006In this effort, a numerical study of the bifurcation behavior of a supercavitating vehicle is conducted. The nonsmoothness of this system is due to the planing force acting on the vehicle. With a focus on dive-plane dynamics, bifurcations with respect to a quasi-static variation of the cavitation number are studied.
Guojian Lin +2 more
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Practical Cascade Control for Supercavitating Vehicle
2021 IEEE 10th Data Driven Control and Learning Systems Conference (DDCLS), 2021Supercavitating vehicles, compared with other underwater vehicles, have amazing high speeds. However, the supercavitating vehicles have the unique tail-slap phenomenon in motion due to the lack of buoyancy and the existence of the planing force. In addition, there are large and unpredictable uncertainties in the hydrodynamics of the supercavitating ...
Yu Zhou +4 more
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Modeling and Control of Supercavitating Vehicle
30th International Symposium on Ballistics, 2017A supercavitating vehicle dynamic model is introduced based on the piecewise linear planing force function through the nonlinear planing force of a supercavitating vehicle, which is a four dimensional piecewise linear system and its dynamic characteristics (such as the equilibrium point and stability) are analyzed.
TIANHONG XIONG, YIPIN LV, WENJUN YI
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Linear, parameter-varying control of a supercavitating vehicle
Control Engineering Practice, 2009A systematic approach to parameter-dependent control synthesis of a high-speed supercavitation vehicle (HSSV) is presented. The aim of the control design is to provide robust reference tracking across a large flight envelope, while directly accounting for the interaction of liquid and gas phases with the vehicle.
Bálint Vanek +2 more
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Trajectory Optimization Strategies for Supercavitating Underwater Vehicles
Journal of Vibration and Control, 2008Supercavitating vehicles are characterized by substantially reduced hydrodynamic drag, in comparison with fully wetted underwater vehicles. Drag is localized at the nose of the vehicle, where a cavitator generates a cavity that completely envelopes the body, at the fins, and on the vehicle after-body.
M. Ruzzene +3 more
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