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Dynamics and Simulation of Flexible Rockets

Dynamics and Simulation of Flexible Rockets
  • Author : Timothy M. Barrows,Jeb S. Orr
  • Publisher :Unknown
  • Release Date :2020-12-11
  • Total pages :338
  • ISBN : 9780128199954
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Summary : Dynamics and Simulation of Flexible Rockets provides a full state, multiaxis treatment of launch vehicle flight mechanics and provides the state equations in a format that can be readily coded into a simulation environment. Various forms of the mass matrix for the vehicle dynamics are presented. The book also discusses important forms of coupling, such as between the nozzle motions and the flexible body. This book is designed to help practicing aerospace engineers create simulations that can accurately verify that a space launch vehicle will successfully perform its mission. Much of the open literature on rocket dynamics is based on analysis techniques developed during the Apollo program of the 1960s. Since that time, large-scale computational analysis techniques and improved methods for generating Finite Element Models (FEMs) have been developed. The art of the problem is to combine the FEM with dynamic models of separate elements such as sloshing fuel and moveable engine nozzles. The pitfalls that may occur when making this marriage are examined in detail. Covers everything the dynamics and control engineer needs to analyze or improve the design of flexible launch vehicles Provides derivations using Lagrange’s equation and Newton/Euler approaches, allowing the reader to assess the importance of nonlinear terms Details the development of linear models and introduces frequency-domain stability analysis techniques Presents practical methods for transitioning between finite element models, incorporating actuator dynamics, and developing a preliminary flight control design

Vibration Control of a Flexible Rocket Using Fiber Bragg Grating Sensor Arrays

Vibration Control of a Flexible Rocket Using Fiber Bragg Grating Sensor Arrays
  • Author : Bartel J. Van der Veek
  • Publisher :Unknown
  • Release Date :2013
  • Total pages :454
  • ISBN : OCLC:879572602
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Summary : As launch vehicle designs become more slender, the effects of bending vibration on control system stability could be dominant in control systems designed using rigid-body dynamics. Vibrational loads can also cause major damage to the launch vehicle, either in the form of vibrational fatigue or excitation of the structures resonant frequencies. This work investigates a novel method to control vibrations in real time using a real time control target with distributed strain measurements from FBG sensor arrays. Active control of the flexible structure will reduce vibration, which will decrease the chance of damaging the structure. A scaled test article representative of the structural dynamics associated with a slender launch vehicle is designed and built. Finite element analysis modeling methodology is developed to capture the most significant features of test specimen. A model for the entire test article is developed, including frequency response of the cantilever beam, thruster dynamics, and sensor conversion matrices. This research develops, models and provides experimental validation of the use of an array of cold gas thrusters for the real time control of the bending dynamics of a test article. Three separate control algorithms are developed to minimize vibration in the test article, using the FBG strain measurements to calculate required thrust. A classical control algorithm for benchmark purposes, a robust control algorithm and an adaptive control algorithm are implemented. The controller performance is investigated by simulation using the developed model, and these results are experimentally verified using the experimental setup. The performance comparison shows that classic controller is hard to implement experimentally due to decoupling issues, the robust controller achieves good vibration suppression in both simulations and experimental results, and the adaptive controller shows good results, with a potential to surpass the robust controller results in future research. Using the robust controller to control the continuous excited first and second resonant mode of the test setup, shows 94% and 80% reduction of peak-peak vibration respectively, when compared to the open loop response. This research also investigates using the same FBG sensor arrays to reduce the number of IMU sensing units in the launch vehicle.

Introduction to Dynamics and Control of Flexible Structures

Introduction to Dynamics and Control of Flexible Structures
  • Author : John L. Junkins
  • Publisher :Unknown
  • Release Date :1993
  • Total pages :467
  • ISBN : 1600860796
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Summary :

Atmospheric and Space Flight Dynamics

Atmospheric and Space Flight Dynamics
  • Author : Ashish Tewari
  • Publisher :Unknown
  • Release Date :2007-11-15
  • Total pages :556
  • ISBN : 9780817644383
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Summary : This book offers a unified presentation that does not discriminate between atmospheric and space flight. It demonstrates that the two disciplines have evolved from the same set of physical principles and introduces a broad range of critical concepts in an accessible, yet mathematically rigorous presentation. The book presents many MATLAB and Simulink-based numerical examples and real-world simulations. Replete with illustrations, end-of-chapter exercises, and selected solutions, the work is primarily useful as a textbook for advanced undergraduate and beginning graduate-level students.

Flexible Multibody Dynamics

Flexible Multibody Dynamics
  • Author : Arun K. Banerjee
  • Publisher :Unknown
  • Release Date :2016-03-23
  • Total pages :312
  • ISBN : 9781119015611
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Summary : Arun K. Banerjee is one of the foremost experts in the world on the subject of flexible multibody dynamics. This book describes how to build mathermatical models of multibody systems with elastic components. Examples of such systems include the human body itself, construction cranes, cares with trailers, helicopers, spacecraft deploying antennas, tethered satellites, and underwater maneuvering vehicles. This book provides methods of analysis of complex mechanical systems that can be simulated in less computer time than other methods. It equips the reader with knowledge of algorithms that provide accurate results in reduced simulation time.

Flexible Multibody Dynamics

Flexible Multibody Dynamics
  • Author : Arun K. Banerjee
  • Publisher :Unknown
  • Release Date :2016-03-17
  • Total pages :312
  • ISBN : 9781119015604
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Summary : Arun K. Banerjee is one of the foremost experts in the world on the subject of flexible multibody dynamics. This book describes how to build mathermatical models of multibody systems with elastic components. Examples of such systems include the human body itself, construction cranes, cares with trailers, helicopers, spacecraft deploying antennas, tethered satellites, and underwater maneuvering vehicles. This book provides methods of analysis of complex mechanical systems that can be simulated in less computer time than other methods. It equips the reader with knowledge of algorithms that provide accurate results in reduced simulation time.

The Art of Molecular Dynamics Simulation

The Art of Molecular Dynamics Simulation
  • Author : D. C. Rapaport,Rapaport, Dennis C. Rapaport
  • Publisher :Unknown
  • Release Date :2004-04
  • Total pages :549
  • ISBN : 0521825687
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Summary : First time paperback of successful physics monograph. Copyright © Libri GmbH. All rights reserved.

Research on Mechanics, Dynamic Systems and Material Engineering

Research on Mechanics, Dynamic Systems and Material Engineering
  • Author : B. Xu,H.Y. Li
  • Publisher :Unknown
  • Release Date :2012-12-27
  • Total pages :366
  • ISBN : 9783038139508
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Summary : Volume is indexed by Thomson Reuters CPCI-S (WoS). The collection includes selected peer-reviewed papers from the 2012 International conference on Mechanics , Dynamic Systems and Material Engineering (MDSME2012) held November 24-25, 2012 in Guangzhou, China. The 70 papers are grouped into the following chapters: Chapter 1: Research on Mechanics and Dynamics of Systems in Mechanical Engineering, Chapter 2: Research on Material Engineering and Material Applications.

Publications of the Faculty and Staff ...

Publications of the Faculty and Staff ...
  • Author : University of Alabama
  • Publisher :Unknown
  • Release Date :1977
  • Total pages :229
  • ISBN : MINN:319510014300427
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Summary :

Unguided Rocket Ballistics Conference 30 August-1 September 1966

Unguided Rocket Ballistics Conference 30 August-1 September 1966
  • Author : TEXAS WESTERN COLL EL PASO.
  • Publisher :Unknown
  • Release Date :1966
  • Total pages :350
  • ISBN : OCLC:227427056
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Summary : Contents: Simulation program for aeroballistic research and trajectory analysis, A simplified ballistics model for sounding rockets, The dynamic equations of a flexible rocket vehicle, Pitch-plane natural frequencies of a flexible sounding rocket, The Aerobee 150 as a ballistic model, Operational requirements of the athena ballistic model, Wind variability over a complex surface, An automatic data collection and processing network, Methods used by the ballistic research laboratories in determining performance parameters for fin stabilized free-flight missiles, recent changes in the analogue data handling capabilities at data analysis center, comparative analysis of various methods of impact point prediction for unguided rockets, circular probable error estimates derivable from one formula, Techniques leading to the formulations of the data report of the meteorological rocket network firings, A general impact prediction scheme for use on a small or medium size computer, A digital computer subroutine for the automatic selection of radar data for instantaneous impact prediction, Development of a ballistic missile target, Some applications of wind to unguided rocket impact predictions, basic requirements for firing unguided rockets relative to missile flight, Basic considerations in the development of an unguided rocket trajectory simulation model, Meteorological instrumentation for rocket ballistic support, Layer wind measurement by acoustic means, Ballistic wind variability, Requirements for field impact predictions, Iterative techniques for computing launcher settings.

Flexible Multibody Dynamics

Flexible Multibody Dynamics
  • Author : Arun K. Banerjee
  • Publisher :Unknown
  • Release Date :2016-05-23
  • Total pages :312
  • ISBN : 9781119015642
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Summary : "This book describes how to build mathematical models of multibody systems with elastic components. Examples of such systems are the human body itself, construction cranes, cars with trailers, helicopters, spacecraft deploying antennas, tethered satellites, and underwater maneuvering vehicles looking for mines while being connected by a cable to a ship"--

Paper

Paper
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1991
  • Total pages :229
  • ISBN : UOM:39015023320917
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Summary :

Transfer Matrix Method for Multibody Systems

Transfer Matrix Method for Multibody Systems
  • Author : Xiaoting Rui,Guoping Wang,Jianshu Zhang
  • Publisher :Unknown
  • Release Date :2018-10-02
  • Total pages :768
  • ISBN : 9781118724835
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Summary : TRANSFER MATRIX METHOD FOR MULTIBODY SYSTEMS: THEORY AND APPLICATIONS Xiaoting Rui, Guoping Wang and Jianshu Zhang - Nanjing University of Science and Technology, China Featuring a new method of multibody system dynamics, this book introduces the transfer matrix method systematically for the first time. First developed by the lead author and his research team, this method has found numerous engineering and technological applications. Readers are first introduced to fundamental concepts like the body dynamics equation, augmented operator and augmented eigenvector before going in depth into precision analysis and computations of eigenvalue problems as well as dynamic responses. The book also covers a combination of mixed methods and practical applications in multiple rocket launch systems, self-propelled artillery as well as launch dynamics of on-ship weaponry. • Comprehensively introduces a new method of analyzing multibody dynamics for engineers • Provides a logical development of the transfer matrix method as applied to the dynamics of multibody systems that consist of interconnected bodies • Features varied applications in weaponry, aeronautics, astronautics, vehicles and robotics Written by an internationally renowned author and research team with many years' experience in multibody systems Transfer Matrix Method of Multibody System and Its Applications is an advanced level text for researchers and engineers in mechanical system dynamics. It is a comprehensive reference for advanced students and researchers in the related fields of aerospace, vehicle, robotics and weaponry engineering.

Flexible Multibody Dynamics

Flexible Multibody Dynamics
  • Author : Michel Géradin,Alberto Cardona
  • Publisher :Unknown
  • Release Date :2001-03-05
  • Total pages :327
  • ISBN : UOM:39015049711511
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Summary : Flexible Multibody Dynamics comprehensively describes the numerical modelling of flexible multibody dynamics systems in space and aircraft structures, vehicles, and mechanical systems. A rigorous approach is followed to handle finite rotations in 3D, with a thorough discussion of the different alternatives for parametrization. Modelling of flexible bodies is treated following the Finite Element technique, a novel aspect in multibody systems simulation. Moreover, this book provides extensive coverage of the formulation of a general purpose software for flexible multibody dynamics analysis, based on an exhaustive treatment of large rotations and finite element modelling, and incorporating useful reference material. Features include different solution techniques such as: * time integration of differential-algebraic equations * non-linear substructuring * continuation methods * nonlinear bifurcation analysis. In essence, this is an ideal text for senior undergraduates, postgraduates and professionals in mechanical and aeronautical engineering, as well as mechanical design engineers and researchers, and engineers working in areas such as kinematics and dynamics of deployable structures, vehicle dynamics and mechanical design.

Rigid Body Dynamics for Space Applications

Rigid Body Dynamics for Space Applications
  • Author : Vladimir S Aslanov
  • Publisher :Unknown
  • Release Date :2017-04-22
  • Total pages :420
  • ISBN : 9780081018743
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Summary : Rigid Body Dynamics for Space Applications explores the modern problems of spaceflight mechanics, such as attitude dynamics of re-entry and space debris in Earth's atmosphere; dynamics and control of coaxial satellite gyrostats; deployment, dynamics, and control of a tether-assisted return mission of a re-entry capsule; and removal of large space debris by a tether tow. Most space systems can be considered as a system of rigid bodies, with additional elastic and viscoelastic elements and fuel residuals in some cases. This guide shows the nature of the phenomena and explains the behavior of space objects. Researchers working on spacecraft attitude dynamics or space debris removal as well as those in the fields of mechanics, aerospace engineering, and aerospace science will benefit from this book. Provides a complete treatise of modeling attitude for a range of novel and modern attitude control problems of spaceflight mechanics Features chapters on the application of rigid body dynamics to atmospheric re-entries, tethered assisted re-entry, and tethered space debris removal Shows relatively simple ways of constructing mathematical models and analytical solutions describing the behavior of very complex material systems Uses modern methods of regular and chaotic dynamics to obtain results

A Mode Decomposition Based Finite Element Formulation for the Nonlinear Dynamics of Flexible Spatial Structures and Mechanisms

A Mode Decomposition Based Finite Element Formulation for the Nonlinear Dynamics of Flexible Spatial Structures and Mechanisms
  • Author : Joseph Francis D'Costa
  • Publisher :Unknown
  • Release Date :1994
  • Total pages :270
  • ISBN : MINN:31951D01071300O
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Summary :

Virtual Fiber Optic Sensor Array for Novel Mathematical Modeling of New Generation Flexible Launch Vehicles

Virtual Fiber Optic Sensor Array for Novel Mathematical Modeling of New Generation Flexible Launch Vehicles
  • Author : Behzad Shariati Javani
  • Publisher :Unknown
  • Release Date :2015
  • Total pages :244
  • ISBN : OCLC:935371806
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Summary : Missiles and launch vehicles are typically slender in shape to reduce aerodynamic drag. Bending vibration of the rocket body occurs when a flying object with a large slenderness ratio actuates the aerodynamic control surfaces to perform pitch or yaw commands. The Inertial Measurement Unit (IMU) onboard the rocket measures the attitude and angular velocities of the deflected body as well as the rigid body motion, and in turn feeds these signals back into the control loop. Feedback of vibrating information usually degrades the control system stability and in the worst cases makes the rocket system unstable. These effects become more significant as the slenderness ratio of the rocket increases. Another important challenge in launch vehicle simulation and control is created by the time-varying mass and inertia of the vehicle, as well as the consequent changes in modal frequencies and modal shapes of the structure as propellant is exhausted. To stabilize the trajectory of a rocket while considering its flexible dynamics, the estimation of displacement, rate of rotation and acceleration at any point on launch vehicle is a critical aspect of mission planning and controller design. The primary objective of this study is to propose a novel model to demonstrate equivalent performance between the Fiber Optic Sensor Array System combined with Forward Navigation IMU (FOSS-IMU System) compared to the standard launch vehicle body bending sensor configuration, as shown in Figure 0-1. The FOSS-IMU system is an innovative algorithm that enables accurate prediction of deflection, rate of rotation and acceleration of any point in the flexible structure relative to the rigid body frame. The FOSS-IMU algorithm is based on modal matrices {[M], [k], [phi], [theta]} that are calculated using only a finite element model of the structure. More importantly, the FOSS-IMU system is based on direct measurements of deflection in multiple points in the structure, which allows accurate estimation of the states of the flexible structure with NO NEED of estimation of load forces or a damping matrix, or no need to assume that the damping is linear and viscous, as current structural models of flexible structures are forced to assume. An experimental benchmark matrix is designed to assess the performance of the proposed system. For each test case FOM (Figure of Merit) Tables are generated to show how well the estimate from FOSS-IMU system compares with raw output from the real IMUs, including the corresponding transformations of reference frames. This study was supported and funded by NASA Launch Services Program based in Kennedy Space Center located in Cape Canaveral, Florida.

Transfer Matrix Method for Multibody Systems

Transfer Matrix Method for Multibody Systems
  • Author : Xiaoting Rui,Guoping Wang,Jianshu Zhang
  • Publisher :Unknown
  • Release Date :2018-11-29
  • Total pages :768
  • ISBN : 9781118724804
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Summary : TRANSFER MATRIX METHOD FOR MULTIBODY SYSTEMS: THEORY AND APPLICATIONS Xiaoting Rui, Guoping Wang and Jianshu Zhang - Nanjing University of Science and Technology, China Featuring a new method of multibody system dynamics, this book introduces the transfer matrix method systematically for the first time. First developed by the lead author and his research team, this method has found numerous engineering and technological applications. Readers are first introduced to fundamental concepts like the body dynamics equation, augmented operator and augmented eigenvector before going in depth into precision analysis and computations of eigenvalue problems as well as dynamic responses. The book also covers a combination of mixed methods and practical applications in multiple rocket launch systems, self-propelled artillery as well as launch dynamics of on-ship weaponry. • Comprehensively introduces a new method of analyzing multibody dynamics for engineers • Provides a logical development of the transfer matrix method as applied to the dynamics of multibody systems that consist of interconnected bodies • Features varied applications in weaponry, aeronautics, astronautics, vehicles and robotics Written by an internationally renowned author and research team with many years' experience in multibody systems Transfer Matrix Method of Multibody System and Its Applications is an advanced level text for researchers and engineers in mechanical system dynamics. It is a comprehensive reference for advanced students and researchers in the related fields of aerospace, vehicle, robotics and weaponry engineering.

Multibody dynamics

Multibody dynamics
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1990
  • Total pages :229
  • ISBN : UCAL:B5008482
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Summary :

A Digital Computer Program for the Dynamic Interaction Simulation of Controls and Structure (DISCOS), Volume 1

A Digital Computer Program for the Dynamic Interaction Simulation of Controls and Structure (DISCOS), Volume 1
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1978
  • Total pages :169
  • ISBN : NASA:31769000427008
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Summary :

Advanced Design of Mechanical Systems: From Analysis to Optimization

Advanced Design of Mechanical Systems: From Analysis to Optimization
  • Author : Jorge A.C. Ambrosio,Peter Eberhard
  • Publisher :Unknown
  • Release Date :2009-11-25
  • Total pages :426
  • ISBN : 9783211994610
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Summary : Multibody systems are used extensively in the investigation of mechanical systems including structural and non-structural applications. It can be argued that among all the areas in solid mechanics the methodologies and applications associated to multibody dynamics are those that provide an ideal framework to aggregate d- ferent disciplines. This idea is clearly reflected, e. g. , in the multidisciplinary applications in biomechanics that use multibody dynamics to describe the motion of the biological entities, in finite elements where multibody dynamics provides - werful tools to describe large motion and kinematic restrictions between system components, in system control where the methodologies used in multibody dynamics are the prime form of describing the systems under analysis, or even in many - plications that involve fluid-structure interaction or aero elasticity. The development of industrial products or the development of analysis tools, using multibody dynamics methodologies, requires that the final result of the devel- ments are the best possible within some limitations, i. e. , they must be optimal. Furthermore, the performance of the developed systems must either be relatively insensitive to some of their design parameters or be sensitive in a controlled manner to other variables. Therefore, the sensitivity analysis of such systems is fundamental to support the decision making process. This book presents a broad range of tools for designing mechanical systems ranging from the kinematic and dynamic analysis of rigid and flexible multibody systems to their advanced optimization.