Dynamics Analysis of Aircraft Landing on the Pitching Deck

2011 ◽  
Vol 467-469 ◽  
pp. 579-582 ◽  
Author(s):  
Zhen Qing Wang ◽  
Xiao Yu Sun ◽  
Song Zhou ◽  
Hong Shuai Lei
Keyword(s):  
Coordinate System ◽  
Dynamics Analysis ◽  
Dynamics Model ◽  
Aircraft Landing ◽  
Complex Simulation ◽  
Simulation Problem

In order to study the aircraft landing on the deck, the landing(on or off center) dynamics model of airplane on deck is built.In this model,the interactions of the aircraft landing attitude , the arresting force acting on the aircraft are considered,and the influence of dynamic deck is introduced into the model .The deck coordinate system is put forward to solve the complex simulation problem..At last,by simulation,it is demonstrated that the model can be applied to the aircraft landing attitude,it is also proved that the model is comprehensive and suitable for any abnormal landing situation.

Identification of Dynamics Bodies From Part Mating Conditions

1994 ◽  
Author(s):  
Victor Fung-Ho ◽  
J. K. Wu
Keyword(s):  
Engineering Design ◽  
Concurrent Engineering ◽  
Mechanical Systems ◽  
Dynamics Analysis ◽  
Dynamics Model ◽  
Global Database ◽  
Redundant Constraints ◽  
Model Setup ◽  
Mating Conditions

Abstract A method to automatically identify bodies for Dynamics Analysis based on a given set of arbitrary parts and their mating conditions has been developed. The use of this method is considered within the context of Concurrent Engineering design of mechanical systems, where an entity translator from a shared global database to a Dynamics database is intended to automatically identify the bodies for rapid Dynamics model setup and simulation. A simplified formulation of the mating conditions that reduces the number of equations needed with respect to previous research is presented. The importance of detecting the equations associated with redundant constraints, in order to obtain the set of bodies, is presented. The method has been demonstrated by using some examples.

Dynamics Analysis and Drive Force Selection for Cylinder Forward Push Lever Lifting Mechanism

2014 ◽  
Vol 644-650 ◽  
pp. 622-627
Author(s):  
Jing Yue Li ◽  
Qin He Gao ◽  
Kai Hua Chen
Keyword(s):  
Dynamics Simulation ◽  
Dynamics Analysis ◽  
Dynamics Model ◽  
Drive Force ◽  
Selection For ◽  
Movement Rules

The dynamics performance for lifting mechanism is a very important factor that affects its rapidity and stability. This paper gives the dynamics equations for lifting process by using a equivalent dynamics model, and makes dynamics analysis for cylinder forward push lever lifting mechanism in a condition of giving its movement rules, and then acquires curves of changing loads on key joints and acceleration of the load centroid by dynamics simulation using ADAMS for five movement rules. In the end, a better selection is made by contrasting the results. This would give some reference to improving the dynamical performance of the lifting mechanism.

scholarly journals Dynamics Model of Carrier-based Aircraft Landing Gears Landed on Dynamic Deck

2009 ◽  
Vol 22 (4) ◽  
pp. 371-379 ◽  
Author(s):  
Zhang Wen ◽  
Zhang Zhi ◽  
Zhu Qidan ◽  
Xu Shiyue
Keyword(s):  
Dynamics Model ◽  
Aircraft Landing ◽  
Landing Gears

Rotor Dynamics Analysis of the Flywheel Energy Storage System

2013 ◽  
Vol 312 ◽  
pp. 3-10
Author(s):  
Guang Xi Li ◽  
Yin Shan Zhang ◽  
Lin He ◽  
Li Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Storage System ◽  
Energy Storage System ◽  
Rotor Dynamics ◽  
Dynamics Analysis ◽  
Dynamics Model ◽  
Flywheel Energy Storage System ◽  
Rotor Support ◽  
Flywheel Rotor

In this paper, a dynamics model of flywheel rotor - support system is build. Obtained the dynamic characteristics of the flywheel rotor by finite element method .The results indicate that the rotor system is stability and security. This provides the basis for the subsequent optimization of flywheel rotor.

Dynamics Analysis of a Sinking Winch Mechanism

2011 ◽  
Vol 105-107 ◽  
pp. 454-457
Author(s):  
Xing Guo Shao ◽  
Zhen Cai Zhu ◽  
Guo Hua Cao ◽  
Yi Lei Li
Keyword(s):  
Numerical Simulation ◽  
Dynamic Analysis ◽  
Lagrange Multiplier ◽  
Simulation Study ◽  
Equations Of Motion ◽  
Dynamics Analysis ◽  
Unilateral Constraints ◽  
Dynamics Model ◽  
Midpoint Method ◽  
Smooth Dynamics

This paper investigates the dynamics of a sinking winch mechanism in the framework of non-smooth dynamics. The previous works ignored the unilateral property of the cable (it can only pull the platform but can’t push it), which is specially taken into consideration in this paper. We propose the set-valued tension law to model the unilateral constraints of the cables. The equations of motion are derived by use of the Lagrange multiplier method. The dynamics model of the mechanism is obtained by combining the equations of motion and the set-valued tension law. Its solution is solved by the Moreau midpoint method. We present a numerical simulation study to demonstrate that the non-smooth dynamics framework is effective and suitable for the dynamic analysis of the sinking winch mechanism.

ANALYSIS AND EMPIRICAL STUDY ON THE IMPETUS AND RESISTANCE OF BPR BASED ON A MECHANICAL DYNAMICS MODEL

2008 ◽  
Vol 07 (01) ◽  
pp. 137-140 ◽  
Author(s):  
SHU PING YI ◽  
TING WANG ◽  
YI WANG ◽  
DE HAI YU
Keyword(s):  
Decision Making ◽  
Systems Analysis ◽  
Business Process Reengineering ◽  
Process Reengineering ◽  
Dynamics Analysis ◽  
Dynamics Model ◽  
Proposed Model ◽  
Important Input ◽  
Mechanical Dynamics

This paper provides concrete support for business process reengineering (BPR) related decision-making, through analysis of the mechanism of impetus and resistance. We categorize the impetus and resistance according to their domains. We then construct a dynamic model of BPR by using the principles and methods of systems analysis, in conjunction with the theory of mechanical dynamics. On this basis, dynamics analysis of the two forces was carried out and the mechanism of effect was also discussed. In the case study, experimental analysis of BPR in CF Company was carried out with the proposed model. The results showed that the model is applied to analyze the impetus and resistance in BPR as important input into the decision-making for BPR, thus compelling to implement BPR for the enterprise.

The Dynamics Analysis and Vibration Measuring of the 5-DOF Magnetic Suspension Flywheel

2011 ◽  
Vol 110-116 ◽  
pp. 3439-3447 ◽  
Author(s):  
Jian Cheng Fang ◽  
Tong Wen
Keyword(s):  
Attitude Control ◽  
Transfer Functions ◽  
Magnetic Suspension ◽  
Dynamics Analysis ◽  
Important Criterion ◽  
Dynamics Model ◽  
Restoring Forces ◽  
Ultra Precision ◽  
Long Life ◽  
Vibration Measuring

Magnetic Suspension Flywheel (MSFW) is regarded as a promising attitude control actuator for the ultra-precision and long life-span spacecraft. The output vibration of an operating MSFW is an important criterion to evaluate the system’s performance. Based on the dynamics model of rotor with the residual imbalances and the transfer functions of the controller, the restoring electromagnetic forces and torques for the suspension of the rotor is calculated. Then a testing rig was designed to measure the displacements, currents and vibration outputs of the MSFW. The vibrations of the basement caused by reactions of the restoring forces and torques are calculated. In the end, the displacements, currents and vibrations of the operating MSFW are measured to evaluate the performance of the MSFW.

Study on Dynamics Model of Macro/Micro Mechanical Arm of the New Workover

2012 ◽  
Vol 538-541 ◽  
pp. 1002-1005
Author(s):  
Yan Wang ◽  
Yu Lian Chang ◽  
Sheng Gao ◽  
Jing Wang
Keyword(s):  
Rigid Body ◽  
Mathematical Models ◽  
Rate Equation ◽  
Theoretical Basis ◽  
Equations Of Motion ◽  
Kinematics And Dynamics ◽  
Dynamics Analysis ◽  
Dynamics Model ◽  
Constraint Equations ◽  
Working Principle

Macro/micro mechanical arm is an important component of workover mechanical system. According to its composition characteristics and working principle, the arm was simplified to a plane system that all components were working in the same plane. Based on rigid body kinematics and dynamics theories, the kinematics and dynamics mathematical models of arm lifting progress were established by using constraint equations, rate equation, acceleration equations, virtual principle work, lagrange multiplier and differential-algebraic mixed equations of motion. It provides theoretical basis for kinematics and dynamics analysis of the macro/micro mechanical arm in lifting process.

Elastic Dynamics Analysis and Simulation of New Tire Building Drum

2011 ◽  
Vol 199-200 ◽  
pp. 106-110
Author(s):  
Zi Xun Yin ◽  
Zong He Guo ◽  
Rong Jiang Cui
Keyword(s):  
Elastic Body ◽  
Dynamic Simulation ◽  
Parallel Mechanism ◽  
Solid Model ◽  
Dynamics Analysis ◽  
Dynamics Model ◽  
Variable Topology ◽  
New Type ◽  
Elastic Dynamics

A new type of variable topology parallel tire building drum mechanism was presented in this paper and the solid model of the mechanism was established. The elastic dynamics model has been established by the condition of displacement and power which the rigid connected with elastic body. The model of variable topology parallel mechanism was imported into the ADAMS and analyzed the elastic dynamic simulation of the mechanism.

Dynamics Analysis and Simulation on Load-Unload Bagged Materials Robot

2013 ◽  
Vol 401-403 ◽  
pp. 431-436
Author(s):  
Ke Yuan Zhou
Keyword(s):  
Feedback Control ◽  
Driving Force ◽  
System Simulation ◽  
Angular Acceleration ◽  
Control Design ◽  
Dynamics Simulation ◽  
Dynamics Analysis ◽  
Dynamics Model ◽  
Robot System ◽  
Force Moment

The dynamics is important for the robot system simulation and feedback control design, so the dynamics of load-unload bagged materials robot is analyzed based on the second kind Lagrange theory, and the precise dynamics model is established. The solution of dynamics differential equations are solved by procedure matlab, dynamics Simulation is analyzed based on platform of ADMAS dummy prototype, obtain series of graph angular acceleration, driving force, moment.

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