scholarly journals Study on optimal parameter of vibration reduction system TMD-D and DVA for an inverted pendulum type structures and application to tower in the ocean

2010 ◽  
Vol 32 (1) ◽  
pp. 59-69
Author(s):  
Khong Doan Dien ◽  
Nguyen Duy Chinh
Keyword(s):  
Numerical Simulation ◽  
Optimal Design ◽  
Inverted Pendulum ◽  
Optimal Parameter ◽  
Vibration Reduction ◽  
Optimal Parameters ◽  
Pendulum System ◽  
Research Results ◽  
Reduction System

Nguyen Dong Anh, Khong Doan Dien and Nguyen Duy Chinh in [1] have studied the vibration of inverse pendulum system installed with the vibration reduction system TMD-D and DVA. These results implemented by numerical simulation for the articulated tower in the ocean show that the obtained oscillations in some cases with installed absorber increase the amplitude of vibration when compared to the case without absorber. It is a fact that when simulation is employed, the parameters of TMD-D and DVA are chosen arbitrarily without optimal design. In the paper, the authors investigate to find the optimal parameters of the TMD-D and DVA absorbers in order to optimally reduce the vibration for the inverse pendulum system. These research results are applied to reduce the vibration for the articulated tower in the ocean.

scholarly journals A global-local approach to the design of dynamic vibration absorber for damped inverted pendulum structures

2015 ◽  
Vol 37 (1) ◽  
pp. 57-70 ◽  
Author(s):  
N. D. Anh ◽  
N. X. Nguyen
Keyword(s):  
Numerical Simulation ◽  
Optimization Problem ◽  
Inverted Pendulum ◽  
Vibration Absorber ◽  
Optimal Parameters ◽  
Local Approach ◽  
Dynamic Vibration Absorber ◽  
Dynamic Vibration ◽  
Soil Structures ◽  
Approximate Expressions

In practice, an inverted pendulum can be used to model many real structures as the arms of robots, soil structures, or fluid structures. However, the study on the design of dynamic vibration absorber for inverted pendulum structures is very limited in the literature. To the best knowledge of the authors, however, there has been no study on the dynamic vibration absorber when the primary inverted pendulum structure is damped. This paper deals with the optimization problem of dynamic vibration absorber for inverted pendulum structures. Two novel findings of the present study are summarized as follows. First, the optimal parameters of dynamic vibration absorber for undamped inverted pendulum structures are given by using \(H_{\infty }\) optimization. Second, the authors suggest a so-called global-local approach to determine approximate expressions for optimal parameters of a pendulum type absorber attached to a damped inverted pendulum structure. Finally, a numerical simulation is done for an example of the articulated tower in the ocean to validate the effectiveness of the results obtained in this work.

Independent Asymmetric Period-3 Motions in a Periodically Forced Double-Pendulum

2019 ◽  
Author(s):  
Albert C. J. Luo ◽  
Chuan Guo
Keyword(s):  
Numerical Simulation ◽  
Vibration Reduction ◽  
Mapping Method ◽  
Eigenvalue Analysis ◽  
Double Pendulum ◽  
Pendulum System ◽  
Implicit Mapping ◽  
Stability And Bifurcation

Abstract In this paper, the independent asymmetric period-3 motions of a periodically forced, damped, double-pendulum are predicted through a discrete implicit mapping method. The corresponding stability and bifurcation conditions of the paired asymmetric period-3 motions are determined through eigenvalue analysis. Numerical simulation of the two asymmetric period-3 motions in the double-pendulum system is completed from analytical predictions. The example presented herein can be used for the vibration reduction of the first pendulum through the motions of the second pendulum.

Optimal Design about Parameters of Cooling Pipes in Hot Stamping Die

2014 ◽  
Vol 988 ◽  
pp. 263-267 ◽  
Author(s):  
Long Chen ◽  
Wei Chen ◽  
Jian Dong Li ◽  
Si Ning Heng ◽  
Jia Wu
Keyword(s):  
Numerical Simulation ◽  
Optimal Design ◽  
Hot Stamping ◽  
Optimal Parameters ◽  
Stamping Die ◽  
Cooling Pipe ◽  
Pipe Section ◽  
Orthogonal Experiments ◽  
Die Surface ◽  
Cooling Pipes

The design reasonability of cooling pipe greatly affects the quenching performance of hot stamping die. In this paper, rectangular box is the carrier, the parameters of cooling pipe section, such as the diameter of cooling pipe, the distance between cooling pipes, the distance between cooling pipes and die surface, were studied by numerical simulation and orthogonal experiments. The quenching uniformity was taken as the evaluation criterion during research. Finally, the optimal parameters about cooling pipes distributed in hot stamping die were obtained and the quenching uniformity was improved.

Predictor-network-based MRACS for inverted pendulum system.

1991 ◽  
Vol 111 (3) ◽  
pp. 221-229 ◽  
Author(s):  
Motomiki Uchida ◽  
Yukihiro Toyoda ◽  
Yoshikuni Akiyama ◽  
Kazushi Nakano ◽  
Hideo Nakamura
Keyword(s):  
Inverted Pendulum ◽  
Pendulum System ◽  
Inverted Pendulum System

Optimal PID Design Approaches for an Inverted Pendulum System

2016 ◽  
Vol 9 (3) ◽  
pp. 167 ◽  
Author(s):  
Muhammad Sani Gaya ◽  
Anas Abubakar Bisu ◽  
Syed Najib Syed Salim ◽  
I. S. Madugu ◽  
L. A. Yusuf ◽  
...  
Keyword(s):  
Inverted Pendulum ◽  
Pendulum System ◽  
Inverted Pendulum System

Justification of design parameters of the fractional reaping conveyor and its devices for removal of beveled stems from under the wheels of the vehicle

2019 ◽  
Vol 1 (3) ◽  
pp. 1-10
Author(s):  
Mikhail M. Konstantinov ◽  
Ivan N. Glushkov ◽  
Sergey S. Pashinin ◽  
Igor I. Ognev ◽  
Tatyana V. Bedych
Keyword(s):  
Optimal Design ◽  
Technological Process ◽  
Design Parameters ◽  
Theoretical Studies ◽  
Optimal Parameters ◽  
Belt Conveyor ◽  
Grain Crops ◽  
Mode Of Operation ◽  
Optimal Values ◽  
Main Component

In this paper we consider the structural and technological process of the combine used in the process of separate harvesting of grain crops, as well as a number of its parameters. Among the main units of the combine, we allocate a conveyor and devices for removing beveled stems from under the wheels of the vehicle. The principle of operation of the conveyor at different phases of the Reaper and especially the removal of cut stems from under the wheels of the vehicle during operation of the Reaper. The results of theoretical studies on the establishment of the optimal design of the parameters of the belt conveyor are presented, the ranges of their optimal values are considered and determined. Studies on the establishment of optimal parameters of the screw divider in the Reaper, which is the main component of the device for removal of beveled stems, are presented. Taking into account the optimal design and mode of operation of the screw divider, the correct work is provided to remove the cut stems from under the wheels of the harvester.

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