scholarly journals Investigation of the heave dynamics of Air Cushion Vehicles (ACV): parametric and chaotic studies

2013 ◽  
Vol 10 (4) ◽  
pp. 725-745 ◽  
Author(s):  
Ahmed S. Sowayan ◽  
Khalid A. AlSaif
Keyword(s):  
Air Cushion ◽  
Air Cushion Vehicles

The Hovertruck — 1

1963 ◽  
Vol 67 (636) ◽  
pp. 755-756 ◽  
Author(s):  
A. E. Bingham
Keyword(s):  
Basic Work ◽  
Air Cushion ◽  
Air Cushion Vehicle ◽  
Air Cushion Vehicles

The phrase “Air-Cushioned Vehicle” describes the complete range of vehicles which obtain some or all of their support from a free pressurised cushion of air contained between the vehicle and the ground.Vickers’ interest in air cushion vehicles stems directly from the basic work carried out on the Hovercraft—one type of air cushion vehicle—by Mr. C. S. Cockerell and the initiative and encouragement displayed by the N.R.D.C. through its subsidiary Hovercraft Development Ltd.

Modeling of the Transient Response for Compressible Air Cushion Vehicles (ACV)

2012 ◽  
Vol 152-154 ◽  
pp. 560-567 ◽  
Author(s):  
Ahmed S. Sowayan ◽  
Khalid A. Alsaif
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Settling Time ◽  
The Self ◽  
Design Stage ◽  
Transient Time ◽  
Bernoulli’S Equation ◽  
Air Cushion ◽  
Air Cushion Vehicles

A model for compressible Air Cushion Vehicles (ACV) is presented. In this model the compressible Bernoulli's equation and the Newton's second law of motion are used to predict the dynamic behavior of the heave response of the ACV in both time and frequency domains. The mass flow rate inside the air cushion of this model is assumed to be constant. The self excited response and the cushion pressure of the ACV is calculated to understand the behavior of the system in order to assist in the design stage of such systems. It is shown in this study that the mass flow rate and the length of the vehicle's skirt are the most significant parameters which control the steady state behavior of the self excited oscillations of the ACV. An equation to predict the transient time of the oscillatory response or the settling time in terms of the system parameters of the ACV is developed. Based on the developed equations, the optimum parameters of the ACV that lead to minimum settling time are obtained.

Developments in skirt systems for air cushion vehicles

1989 ◽  
Author(s):  
PETER INCH ◽  
MARK PRENTICE ◽  
CAROL LEWIS
Keyword(s):  
Air Cushion ◽  
Air Cushion Vehicles

Two-Dimensional Dynamics of Tracked Ram Air Cushion Vehicles With Fixed and Variable Winglets

1979 ◽  
Vol 101 (4) ◽  
pp. 321-331
Author(s):  
L. M. Sweet ◽  
H. C. Curtiss ◽  
R. A. Luhrs
Keyword(s):  
Active Suspension ◽  
Suspension System ◽  
Ride Quality ◽  
Vertical Acceleration ◽  
Suspension Systems ◽  
Active Suspension Systems ◽  
Air Cushion ◽  
Linearized Model ◽  
The One ◽  
Air Cushion Vehicles

A linearized model of the pitch-heave dynamics of a Tracked Ram Air Cushion Vehicle is presented. This model is based on aerodynamic theory which has been verified by wind tunnel and towed model experiments. The vehicle is assumed to be equipped with two controls which can be configured to provide various suspension system characteristics. The ride quality and dynamic motions of the fixed winglet vehicle moving at 330 km/hr over a guideway described by roughness characteristics typical of highways is examined in terms of the rms values of the vertical acceleration in the foremost and rearmost seats in the passenger cabin and the gap variations at the leading and trailing edges of the vehicle. The improvement in ride quality and dynamic behavior which can be obtained by passive and active suspension systems is examined and discussed. Optimal regulator theory is employed to design the active suspension system. The predicted rms values of the vertical acceleration in the one-third octave frequency bands are compared with the vertical ISO Specifications. It is shown that marked improvements in the ride quality can be obtained with either the passive or active suspension systems.

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