Dynamic Analysis and Structure Parameters Optimization of a Parallel Platform Based on ADAMS

2013 ◽  
Vol 289 ◽  
pp. 69-74
Author(s):  
Ying Pin Wang ◽  
Ji Min Liang ◽  
Xue Feng Zhou ◽  
Gong Zhang ◽  
Xian Shuai Chen
Keyword(s):  
Dynamic Analysis ◽  
Structural Parameters ◽  
Control Design ◽  
Parameters Optimization ◽  
Optimization Approach ◽  
Linear Motors ◽  
Parameterized Modeling ◽  
Parallel Platform ◽  
And Control ◽  
The Impact

The dynamic analysis and structural parameters optimization approach based on ADAMS for a parallel platform is presented in this paper. Firstly the parameterized modeling of the parallel platform is performed, which is composed of up and down platform, two linear motors and one support beam. And then the impact of the parameters on the performance of the platform is studied. After that the parallel platform is optimized via the optimization module of the ADAMS. Eventually the conclusions are obtained, which provide the guidance for the mechanical and control design of the parallel platform.

Design and tests of a non-contact Bernoulli gripper for rough-surfaced and fragile objects gripping

2020 ◽  
Vol 40 (5) ◽  
pp. 735-743
Author(s):  
Dong Liu ◽  
Minghao Wang ◽  
Naiyu Fang ◽  
Ming Cong ◽  
Yu Du
Keyword(s):  
Negative Pressure ◽  
Simulation Analysis ◽  
Structural Parameters ◽  
Mathematic Model ◽  
Parameters Optimization ◽  
Dynamics Simulation ◽  
Content Type ◽  
Design And Optimization ◽  
And Performance ◽  
The Impact

Purpose Varied shapes and sizes of different products with irregular rough surface and fragile properties give a challenge to traditional contact gripping. Single Bernoulli grippers are not suited to handle fragile objects as the impact of center negative pressure force could result in large deformation and stress which damage the materials, and they are also have some limitations for gripping objects with different large and small shapes. Thus, this paper aims to design a non-contact gripper for soft, rough-surfaced and fragile objects gripping with multi Bernoulli heads, which have optimal structures and parameters. Design/methodology/approach The compressed air is ejected into four Bernoulli heads through radial and long flow channels, then passes through four strip-shaped narrow gaps after fully developing in the annular cavity to provide negative pressure. Based on the mathematic model and the computational model, the key structural parameters affecting the gripping performance are selected, and parameters optimization of the gripper is performed by computational fluid dynamics simulation analysis and performance evaluation. The orthogonal method is used and L16 orthogonal array is selected for experimental design and optimization. The characteristics of the designed gripper are tested from the aspects of pressure distribution and lifting force. Findings From the applications in gripping different objects, the designed non-contact gripper can grip varied shapes and sizes of soft, rough-surfaced, fragile and sliced objects with little effect of torque. Originality/value In this paper, a non-contact gripper is designed for handling soft, rough-surfaced and fragile objects based on the Bernoulli principle. A systematic approach, which consists of modeling, simulation, optimization and measurement is provided for the non-contact gripper design and tests.

scholarly journals Impact between buildings during earthquakes

1994 ◽  
Vol 27 (2) ◽  
pp. 107-113
Author(s):  
A. J. Carr ◽  
P. J. Moss
Keyword(s):  
Dynamic Analysis ◽  
Numerical Study ◽  
Structural Parameters ◽  
Seismic Excitation ◽  
Relative Importance ◽  
Two Dimensional ◽  
Analysis Program ◽  
Framed Structures ◽  
Design Values ◽  
The Impact

A numerical study of the parameters affecting the impact between adjacent buildings subjected to seismic excitation has been carried out in an endeavour to quantify the relative importance of the structural parameters. A two-dimensional inelastic dynamic analysis program was used to model various combinations of adjacent framed structures subjected to ground accelerograms and where the frames are assumed to be separated by distances sufficiently small as to permit contact. Collisions were modelled using special contact elements which will transmit forces when the specified gap has been closed. It will be shown that where there are adjoining frames are of different heights, large increases in response are observed in the upper part of the taller frame. Pounding can also amplify the effects of localised changes in stiffness and strength up the frame-, producing member demands greatly in excess of the normal design values.

scholarly journals Nonlinear dynamic analysis and control design of a solvent-based post-combustion CO2 capture process

2018 ◽  
Vol 115 ◽  
pp. 397-406 ◽  
Author(s):  
Xiao Wu ◽  
Jiong Shen ◽  
Yiguo Li ◽  
Meihong Wang ◽  
Adekola Lawal ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Co2 Capture ◽  
Nonlinear Dynamic ◽  
Nonlinear Dynamic Analysis ◽  
Control Design ◽  
Capture Process ◽  
And Control
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