Active control of power flow from a vibrating rigid body to a flexible panel through two active isolators

1993 ◽  
Vol 93 (4) ◽  
pp. 1947-1953 ◽  
Author(s):  
Jiaqiang Pan ◽  
Colin H. Hansen
Keyword(s):  
Rigid Body ◽  
Active Control ◽  
Power Flow ◽  
Flexible Panel

Power Transmission from a Vibrating Source through an Intermediate Flexible Panel to a Flexible Cylinder

1994 ◽  
Vol 116 (4) ◽  
pp. 496-505 ◽  
Author(s):  
Jiaqiang Pan ◽  
C. H. Hansen
Keyword(s):  
Rigid Body ◽  
Cost Function ◽  
Active Control ◽  
Power Transmission ◽  
Flexible Cylinder ◽  
Simply Supported ◽  
Flexible Panel ◽  
Isolation Systems ◽  
The Cost ◽  
Supporting Structures

When active control is used to reduce the vibration transmission through machine isolators into supporting structures, the vibratory power transmission through the isolators is often used as the cost function to be minimized. To apply active control effectively to machine isolation systems, it is necessary to investigate the nature of the vibratory power transmission from a vibrating machine to its supporting structure through the isolators. In this study the reduction of vibratory power transmission from a vibrating rigid body into a flexible simply supported cylinder through a flexible, completely free intermediate panel and multiple connected isolators is investigated theoretically and numerically. The system studied in this paper can be taken as a simplified dynamical model of equipment mounting configurations in submarines.

Test of Solidification Characteristics of Grouting and the Effect on Strata Deformation in Shield Tunnelling

2012 ◽  
Vol 568 ◽  
pp. 80-84
Author(s):  
Xiao Chun Zhong ◽  
Wei Ke Qin ◽  
Hai Wang
Keyword(s):  
Numerical Model ◽  
Rigid Body ◽  
Active Control ◽  
Calculation Method ◽  
Civil Engineering ◽  
Test Results ◽  
Shield Tunneling ◽  
Shield Tunnelling ◽  
Strata Deformation ◽  
Over Time

Back-fill Grouting is a key procedure for the active control of strata settlement during shield tunnelling in civil engineering. The paper studies the stress - strain characteristics of grouting and the state of grout, which changes from liquid to solid over time and is simulated by variable rigid body. The model of flowing state are divided in four phases from liquid-plastic to rigid state. The paper establish a numerical model of shield tunnelling in civil engineering with the consideration of characteristics of grout deformation, and has analyzed law of strata settlement. The test results show that the calculation method can well accord with the four stages of strata deformation, and can more accurately reflect the process of strata deformation caused by shield tunneling.

Dynamic Analysis of an Active Flexible Isolation System

2003 ◽  
Author(s):  
Kongjie Song ◽  
Lingling Sun ◽  
Yuguo Sun ◽  
Bing Zhang
Keyword(s):  
Active Control ◽  
Power Flow ◽  
Low Frequency ◽  
Coupled System ◽  
Isolation System ◽  
Active Isolation ◽  
Dynamic Modification ◽  
Mobility Method ◽  
Feed Forward Controller ◽  
Flexible Foundation

This paper is dedicated to the structure dynamic modification in an active isolation system supported by a flexible foundation, in order to improve the effectiveness of the active control strategy. The coupled vibration between machine-sprung and flexible foundation substructure is examined, using the subsystem mobility method. The vibration transmission in this coupled system is presented in terms of power flow. The interaction between structure controlled and the adaptive feed-forward controller is investigated theoretically. The numerical results show that: the location of the active mounts and the first mode frequency of the flexible foundation have evident influence on the effect of active control, especially at low-frequency band.

Active control of a distributed-parameter structure using vortex power flow confinement

1997 ◽  
Vol 102 (3) ◽  
pp. 1648-1656 ◽  
Author(s):  
Nobuo Tanaka ◽  
Yoshihiro Kikushima ◽  
Masaharu Kuroda ◽  
Neil J. Fergusson
Keyword(s):  
Active Control ◽  
Power Flow ◽  
Distributed Parameter

Experiments on the active control of flexural wave power flow

1987 ◽  
Vol 112 (1) ◽  
pp. 187-191 ◽  
Author(s):  
W. Redman-White ◽  
P.A. Nelson ◽  
A.R.D. Curtis
Keyword(s):  
Active Control ◽  
Power Flow ◽  
Flexural Wave ◽  
Wave Power

scholarly journals Euler’s Equations of Rigid Body: Its Control and Synchronization using Active Control and Recursive Backstepping methods.

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Cornelius Ogab ◽  
Babatunde Idowu ◽  
Abiola Ogungbe ◽  
Eugene Onori ◽  
Olufunmilayo Ometan ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Steady State ◽  
Rigid Body ◽  
Active Control ◽  
Lyapunov Stability ◽  
Stability Theory ◽  
Lyapunov Stability Theory ◽  
Control Laws ◽  
Control And Synchronization ◽  
Methods Numerical

We present Euler’s Equation of Rigid Body, its control and synchronization using active control and recursive backstepping methods. Based on Lyapunov stability theory, control laws are derived to synchronize the chaotic system and also to control to a steady state as well as track to a desired function via recursive backstepping methods. Numerical simulation are shown to verify the results.

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