Esimation on Lumped Parameter System: Dynanmc Optimizaion Approach

2005 ◽  
Author(s):  
E. Nagy
Keyword(s):  
Parameter System ◽  
Lumped Parameter

Bond Graph Sign Conventions

1975 ◽  
Vol 97 (2) ◽  
pp. 184-188 ◽  
Author(s):  
A. S. Perelson
Keyword(s):  
Graph Model ◽  
Bond Graph ◽  
Equivalence Classes ◽  
Parameter System ◽  
Bond Graphs ◽  
Lumped Parameter ◽  
Oriented Object

The lack of arbitrariness in the choice of bond graph sign conventions is established. It is shown that an unoriented bond graph may have no unique meaning and that with certain choices of orientation a bond graph may not correspond to any lumped parameter system constructed from the same set of elements. Network interpretations of these two facts are given. Defining a bond graph as an oriented object leads to the consideration of equivalence classes of oriented bond graphs which represent the same system. It is also shown that only changes in the orientation of bonds connecting 0-junctions and 1-junctions can lead to changes in the observable properties of a bond graph model.

Design and Modeling of a New Inchworm Linear Motor

2012 ◽  
Vol 562-564 ◽  
pp. 603-606
Author(s):  
Qi Wang ◽  
Bin Tang Yang ◽  
Lan Tao Liu ◽  
Guang Meng
Keyword(s):  
Research Work ◽  
Linear Motor ◽  
Quick Response ◽  
Parameter System ◽  
Cam Mechanism ◽  
Lumped Parameter ◽  
Output Force ◽  
Optimal Contour ◽  
Large Output ◽  
General Dynamic

This paper presents a research work for the design and modeling of a new inchworm linear motor. The three actuators of the motor are based on electromagnetic and permanent magnetic combined drive. The actuator may generate large output force, large displacement and quick response. A permanent magnet cam is designed to realize the continuous and smooth movement for the actuator. The motion equation of the cam mechanism is established and analyzed by SIMULINK from which the optimal contour of the cam may be confirmed. Then the general dynamic model of the linear motor is established with a 4DOF lumped parameter system.

Analysis of Axial Vibration in the Laminated Rubber-Metal Spring

2013 ◽  
Vol 845 ◽  
pp. 46-50 ◽  
Author(s):  
Mohd Azli Salim ◽  
Azma Putra ◽  
Mohd Azman Abdullah
Keyword(s):  
High Frequency ◽  
Axial Direction ◽  
Vibration Isolator ◽  
Axial Vibration ◽  
Parameter System ◽  
Internal Resonances ◽  
Lumped Parameter ◽  
Metal Plates ◽  
Vibration Transmissibility ◽  
Earthquake Protection

The laminated rubber-metal spring is well known in application as the vibration isolator for earthquake protection. The spring is therefore designed to be able to sustain the vibration waves from horizontal direction. This paper discusses the possibility of the laminated spring to be employed for other applications where the excitation mainly comes from axial direction, such as to isolate vibration transmission from heavy engine. The model is first developed for a simple finite rod to simulate the effect of internal resonances at high frequency when the wavelength is much smaller than the length of the rod. The effect of metal plates inserted in the rubber is then modelled using the lumped parameter system. The results are presented in terms of the vibration transmissibility.

A Design Criterion for Avoiding Resonance in Lumped Mass Normal Mode Systems

1989 ◽  
Vol 111 (1) ◽  
pp. 48-52
Author(s):  
A. D. S. Ross ◽  
D. J. Inman
Keyword(s):  
Normal Mode ◽  
Design Criterion ◽  
Degree Of Freedom ◽  
Simple Design ◽  
Parameter System ◽  
Lumped Mass ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Lumped Parameter

A simple design criterion that determines whether a normal mode multiple degree of freedom damped linear lumped parameter system can or cannot resonate is presented. The relations are derived based on criteria for resonance in the single degree of freedom case, and on the definiteness of certain combinations of coefficient matrices. An example follows that both numerically verifies the derivation and illustrates the simplicity of implementing the result as a design criterion.

Dynamic Behavior of Vehicles Travelling on Bridges

1993 ◽  
Author(s):  
Ebrahim Esmailzadeh ◽  
Mehrdaad Ghorashi
Keyword(s):  
Boundary Conditions ◽  
Dynamic Behavior ◽  
Numerical Solutions ◽  
Equations Of Motion ◽  
Beam Theory ◽  
Parameter System ◽  
Moving Vehicle ◽  
Lumped Parameter ◽  
Euler Bernoulli Beam ◽  
Two Degree Of Freedom

Abstract An investigation into the dynamic behavior of a bridge with simply supported boundary conditions, carrying a moving vehicle, is performed. The vehicle has been modelled as a two degree of freedom lumped-parameter system travelling at a uniform speed. Furthermore, the bridge is assumed to obey the Euler-Bernoulli beam theory of vibration. This analysis may well be applied to a beam with different boundary conditions, but the computer simulation results given in this paper are set for only the case of freely hinged ends. Numerical solutions for the derived differential equations of motion are obtained and their close agreement, in some extreme cases, with those reported earlier by the authors are observed. Finally, the effect of speed on the maximum dynamic deflection of bridge is shown to be of much importance and hence an estimation for the critical speed of the vehicle is presented.

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