1 edition of Nonlinear analysis of coupled roll/sway/yaw stability characteristics of submersible vehicles found in the catalog.
The problem of coupled roll, sway, and yaw stability analysis of submersible vehicles is analyzed, with particular emphasis on nonlinear studies. Previous results had indicated that a primary loss of stability is through the development of limit cycles. This loss of stability is due to the coupling of roll into sway and yaw and cannot be predicted by considering the uncoupled dynamics. In this study, it is shown that the mechanism of loss of stability is through bifurcations to periodic solutions. These are characterized as either subcritical or supercritical, depending on the sign of a certain nonlinear coefficient. Implications of these results to vehicle performance and operations are discussed.
Thesis (master"s)--Naval Postgraduate School, 1997.
|Statement||by Sotirios E. Tsamilis|
|Contributions||Naval Postgraduate School (U.S.)|
|The Physical Object|
|Pagination||viii, 75 p. ;|
|Number of Pages||75|
It is often desirable to keep the load of an offshore crane in a fixed point in space despite the movement of its base. To solve the problem of stabilizing the load’s position, the authors have proposed application of the hoisting winch drum’s drive and an auxiliary by: accepting minimal slosh stability margins; or time domain non-linear analysis to accept time periods of poor stability. Sinusoidal input describing functional analysis is used to develop a relationship between the non-linear slosh damping and an equivalent linear damping at a given slosh amplitude.
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The problem of coupled roll, sway, and yaw stability analysis of submersible vehicles is analyzed, with particular emphasis on nonlinear studies. Previous results had indicated that a primary loss of stability is through the development of limit : Enter the password to open this PDF file: Cancel OK.
File name:. A nonlinear stability analysis of ships in coupled sway, roll and yaw is given by Fossen and Lauvdal (), whereas the design of a nonlinear RRS is discussed by Lauvdal and Fossen () and Lauvdal and Fossen ().
Approved for public release; distribution is unlimitedThe problem of coupled roll, sway, and yaw stability analysis of submersible vehicles is analyzed, with particular emphasis on nonlinear studies. Previous results had indicated that a primary loss of stability Author: Sotirios E.
Tsamilis. An analysis is presented for the nonlinear coupling of the pitch (heave) and roll modes of shiip motions in regular seas when their frequencies are in the ratio of two to one.
When the frequency of encounter (excitation frequency). A coupled roll-sway-heave model for analysing ship capsize in beam seas on the basis of a nonlinear dynamics approach Abstract We study the effect of heave and sway on roll dynamics for a ship in. Abstract. This paper investigates sway, roll and yaw motions of a floating body with the aim to determine coupled motion characteristics based on the order-wise analysis of hydrodynamic coefficients.
To compute the hydrodynamic coefficients and wave force exerted on the floating body, we employ speed-dependent strip by: 9. NPSARCHIVE ,03 TSAMILIS,S. NAVALPOSTGRADUATESCHOOL Monterey,California THESIS Thesis T NONLINEARANALYSISOFCOUPLED ROLL/SWAY/YAWSTABILITY CHARACTERISTICSOFSUBMERSIBLE VEHICLES by is March, ThesisAdvisor: ias Approvedforpublicrelease; Size: 2MB.
present study, a nonlinear roll-coupled model for high-speed container ships proposed by Son and Nomoto [ 13 ] is chosen. The maneuvering equations of motion. To study the behavior of the system of Eqs., the Runge-Kutta of fourth order method, was applied to governing the oscillating system as showTwo resonance cases are confirmed numerically as shown in Fig.
5, Fig. the internal resonance case (ω 2 = 2ω 1), we have the first mode start with a compound traveling waves and becomes stable, while the Cited by: Ocean Engng, Vol.
13, No. 6, pp./86 $ + Printed in Great Britain. Pergamon Journals Ltd. TECHNICAL NOTE ON THE NONLINEAR UNCOUPLED ROLL AND PITCH OF SUBMERGED VEHICLES VICTOR BIRMAN School of Naval Architecture and Marine Engineering, University of New Orleans, P.O. BoxOrleans, LouisianaCited by: 3.
Using a combination of analytical and numerical methods, the paper studies the stability and bifurcations for a model of a nonlinear coupled pitch–roll ship.
The model represents a two-degree-of-freedom system with quadratic coupling subjected to a Cited by: The nonlinear dynamics of the coupled ship rolling in steep beam waves Research Team Kostas J.
Spyrou • To build a detailed mathematical model for the coupled heave, sway and roll As application we have used a Japanese fishing vessel whose body plan and roll restoring characteristics are shown in figure 5.
Numerical simulations of the. Bifurcation analysis of a nonlinear coupled pitch–roll ship. ship's characteristics, etc. Deleanu has considered a straightforward expansion. A mathematical model is described to investigate the damping moment of weakly nonlinear roll and yaw motions of a floating body in time domain under the action of sinusoidal waves.
The mathematical formulation for added mass moment of inertia and damping is presented by approximating time-dependent coefficients and forcing moments when small distortion : S. Das, S. Das. The paper investigates the characteristics of response amplitude operators (RAO) or transfer function of a floating body in frequency domain for coupled sway, roll and yaw motions in sinusoidal waves.
Non-Linear Coupled Analysis for a Moored FPSO in Deepwater of the Gulf of by: 1. A nonlinear dynamical system is first derived which describes the horizontal-plane motion of the vehicle coupled with an internal moving mass.
It is shown that a displacement of the internal mass in the sway direction can affect the flow of the dynamical system in phase by: 8.
The stability of the closed-loop system with the proposed nonlinear controllers is proven by Lyapunov arguments. Experimental results for the trajectory tracking control in 2 degrees of freedom, these are the depth and yaw motion of an underwater vehicle, show the performance of the proposed control by: The paper deals with the prediction of coupled sway-roll-yaw motions of a ship with constant forward speed, subject to regular wave force.
The governing equations derived in time domain after balancing the hydrodynamic and exciting forces are solved analytically while considering the motion variables, wave frequency and external force are Cited by: 2. Recognizing the negligible sway influence on coupled roll and heave motions and overall barge stability, and in an attempt to reduce anticipated stochastic computational efforts in stability analysis, a two-degree-of-freedom (2DOF) roll-heave model is derived by uncoupling sway from the roll-heave governing equations of by: 5.
To the best of our knowledge, no literature on rotary-molded boat stability has been published. In this paper, we choose a rotary-molded fishing entertainment boat as the research object. We consider the elastic deformation of boat in the new roll motion equation and study the establishment of nonlinear roll motion equation and stability Cited by: 3.
This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Abstract. This paper presents vehicle stability analysis for a nonlinear vehicle model based on phase plane behavior theorem.
Vehicle models under pure lateral slip, constant velocity, and constant front steer were by: 1. There has been a great deal of excitement in the last ten years over the emer gence of new mathematical techniques for the analysis and control of nonlinear systems: Witness the emergence of a set of simplified tools for the analysis of bifurcations, chaos, and other complicated dynamical behavior and the develop ment of a comprehensive theory of 4/5(4).
A nonlinear rotor-seal-bearing system model, including the Muszynska nonlinear seal force model and nonlinear oil-film force model based on short bearing assumption, is proposed in this paper. The non-dimensional dynamic motion equations of the system are also established and solved by fourth order Runge-kutta method.
The nonlinear dynamic characteristics of the system are Cited by: 6. In order to study the dynamic behavior of ships navigating in severe environmental conditions it is imperative to develop their governing equations of motion taking into account the inherent nonlinearity of large-amplitude ship motion.
The purpose of this paper is to present the coupled nonlinear equations of motion in heave, roll, and pitch based on physical by: Yaw stability control system plays a significant role in vehicle lateral dynamics in order to improve the vehicle handling and stability performances.
However, not many researches have been focused on the transient performances improvement of vehicle yaw rate and sideslip tracking control. This paper reviews the vital elements for control system design of an active yaw stability Cited by: the prediction time of the MPC formulation for vehicle yaw stability control is typically s ,  while the time constant for the lagged dynamics of lateral tire force can be up to s, the prediction model for MPC for vehicle yaw stability control must reflect the lagged characteristics of the tire Size: 1MB.
Stability Analysis of Nonlinear Systems is an invaluable single-sourse reference for industrial and applied mathematicians, statisticians, engineers, researchers in the applied sciences, and graduate students studying differential equations.
Enter your mobile number or email address below and we'll send you a link to download the free Kindle Cited by: Yaw stability of an automotive vehicle in a turn is critical to the overall stability of the vehicle. In this paper, we present a method of vehicle stability control (VSC) based on Model Predictive Control (MPC).
Conventional VSCs work passively as they detect excessive yaw. The effect of water flow on deck on ship motion, especially for small vessels with open deck and RO-RO ferries, is very important for safe operations in waves (Caglayan and Storch, ; Grochowalski, ).
This video demonstrates the robustness of a saturation based nonlinear controller for underwater vehicles. The performance of yaw and depth control of the L2ROV prototype is maintained, even when.
Conventionally, nonlinear bifurcation analysis approach is applied to examine the nonlinear dynamic characteristics of single-unit vehicles, e.g., cars, trucks, etc.
Little attention has been paid to investigate the feasibility and effectiveness of the bifurcation analysis method for nonlinear stability analysis of articulated vehicles under Cited by: 3.
Consider the effect of nonlinear spring and linear viscous damping in structure, the motion equations of a helicopter blade-absorber system has been established by Lagrange equation.
Since the helicopter blade-absorber system exists motion coupling, the inertia and stiffness terms of equations are decoupled via equivalent principal coordinate transformation. The stability Cited by: 1.
A hierarchical yaw stability control algorithm for FWIA electric ground vehicles is presented. A sliding mode approach based on conditional integrator was proposed to control the vehicle yaw rate. It keeps the characteristics of sliding mode control and when system enters the boundary layer, it turns to be a PI-like by: 3.
where T are the translations (ξ 1,ξ 2,ξ 3) in surge, sway, and heave, and the matrix T is a function of the Eulerian rotation angles (ξ 6,ξ 5,ξ 4) for yaw, pitch, and roll. The order of the Eulerian angles have been deliberately chosen in descending order.
Linear Dynamic Stability Analysis of a Surface-Piercing Plate Advancing at High Forward Speed Babak Ommani, Babak Ommani. Modeling of Response Amplitude Operator for Coupled Sway, Roll and Yaw Motions of a Floating Body in Sinusoidal Waves Using Frequency Based : Babak Ommani, Odd M.
Faltinsen. A method for the identification of the damping, restoring, and coupling parameters in the equations describing the coupled heave and pitch motions for an underwater robotic vehicle (URV) sailing near sea surface in random waves using only its measured responses at sea is by: 4.
In this special issue, the current state of nonlinear structural dynamic models in vibration analysis, stability analysis, and control has been reviewed. Known methods for analysis of nonlinear and oscillating systems at a macroscopic scale have been explored in some new problems, and some new techniques have been applied to complex structures Author: Carlo Cattani, Alexander Seyraman, Irina Trendafilova.
Vehicle handling, stability, and bifurcation of equilibrium conditions were studied using a state vector approach. The research provided a framework for an improved method of vehicle handling assessment that included non-linear regions of performance and transient by: 1.
Shareable Link. Use the link below to share a full-text version of this article with your friends and colleagues. Learn more.Course stability of a ship in a canal: Nonlinear, nonlifting and nonviscous hydrodynamic forces and moments on a maneuvering body: Maneuvering in waves and broaching: Linear coupled sway-yaw-roll motions of.
A robust yaw stability control design based on active front steering control is proposed for in-wheel-motored electric vehicles with a Steer-by-Wire (SbW) system. The proposed control system consists of an inner-loop controller (referred to in this paper as the steering angle-disturbance observer (SA-DOB), which rejects an input steering disturbance by Cited by: