Modeling and dynamic properties of dual-chamber solid and liquid mixture vibration isolator

2016 ◽  
Vol 374 ◽  
pp. 61-76 ◽  
Author(s):  
F.S. Li ◽  
Q. Chen ◽  
J.H. Zhou
Keyword(s):  
Liquid Mixture ◽  
Dynamic Properties ◽  
Vibration Isolator ◽  
Dual Chamber

Experimental study on the dynamic properties of the dual-chamber solid and liquid mixture vibration isolator

2018 ◽  
Vol 24 (22) ◽  
pp. 5302-5311 ◽  
Author(s):  
FS Li ◽  
Q Chen ◽  
JH Zhou
Keyword(s):  
Liquid Mixture ◽  
Dynamic Properties ◽  
Liquid Column ◽  
Test Results ◽  
Equivalent Stiffness ◽  
Dual Chamber ◽  
Equivalent Damping ◽  
Fluid Damping ◽  
Equivalent Mass ◽  
Stiffness And Damping

The dual-chamber solid and liquid mixture (SALiM) isolator exhibits multiple stiffness and damping properties with various parameters. As a passive isolation device, the dual-chamber SALiM isolator can also obtain a variable stiffness property by substituting the valve with an active throttle device. Before that, the dynamic properties of the isolator need to be further investigated. Sine sweep tests under different valve openings were implemented to analyze the frequency response characteristics of the system. Two hydro pressure sensors were added into the two chambers to record the pressure signals, with which the equivalent stiffness, equivalent damping, fluid damping, and equivalent mass of the liquid column were identified. Based on the test results, numerical and theoretical analysis, the dynamic properties of the isolator including the influence of the fluid damping and inertia mass on the equivalent stiffness, the relation between the isolator's equivalent damping and the fluid damping, the fluid capacity of the linking tube, and the equivalent mass of the liquid column were analyzed in depth. Conclusions about stiffness and damping obtained from the test results correspond well with those from the theoretical analysis, but the identification results of the equivalent mass, which show that the negative correlation of equivalent mass of the liquid column with its response amplitude seems controversial. An assumption is proposed to explain the abnormal characteristics of the liquid column. However, the exact model of the inertia track needs further exploration and verification.

scholarly journals A New Chaotic Mixer Design Based on the Delta Robot and Its Experimental Studies

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Onur Kalayci ◽  
Ihsan Pehlivan ◽  
Akif Akgul ◽  
Selcuk Coskun ◽  
Ersin Kurt
Keyword(s):  
Distribution Ratio ◽  
Chaotic Systems ◽  
Liquid Mixture ◽  
Dynamic Properties ◽  
Mixing Time ◽  
Experimental Studies ◽  
Chaotic Mixing ◽  
Position Information ◽  
Delta Robot ◽  
Arduino Uno

In this study, a new chaotic mixer based on the Delta robot was designed and produced which had been controlled with Arduino Uno card and MATLAB. First of all, chaotic mixing systems with different dynamic properties were chosen for the chaotic mixing process. Then, by solving the chaotic systems selected in the MATLAB with the Runge Kutta 45 (RK45) numerical solution algorithm, the results in the integer format were obtained. The obtained chaotic time-series results were transformed into 3-dimensional position information for the servomotors used in the mixer with the algorithm developed in MATLAB. The supervision was provided to ensure that the newly designed chaotic mixer was pacing chaotically in x, y, and z coordinates by transferring the chaotic position information to the Arduino Uno R3 card via USB 2.0. With the software developed in MATLAB, the performances of 7 diversified chaotic systems’ trajectories and circular motion trajectories were compared over the numerical simulation orbital distribution ratio (ODR). In the final stage, in a solid-liquid mixture type, at the selected constant mixing time, experimental studies were performed where homogeneity and orbital distribution ratio (ODR) parameters were compared by using 7 diversified chaotic systems. The designed and produced chaotic mixer can also be used in experimental studies of certain liquid-liquid mixture types. It is thought that this prototype presented in the article will serve the aim of developing new chaotic mixer systems and algorithms to derive more homogeneous mixtures in a shorter time.

The distribution of antigen on the surface of RBL-2H3 rat basophilic leukemia cells observed by back-scattered electron imaging

1986 ◽  
Vol 44 ◽  
pp. 274-275
Author(s):  
R.F. Stump ◽  
J.R. Pfeiffer ◽  
JC. Seagrave ◽  
D. Huskisson ◽  
J.M. Oliver
Keyword(s):  
Cell Surface ◽  
Dynamic Properties ◽  
Leukemia Cells ◽  
Antigen Binding ◽  
Scattered Electron ◽  
Ige Receptor ◽  
Receptor Complexes ◽  
Rat Basophilic Leukemia Cells ◽  
Electron Imaging ◽  
Basophilic Leukemia

In RBL-2H3 rat basophilic leukemia cells, antigen binding to cell surface IgE-receptor complexes stimulates the release of inflammatory mediators and initiates a series of membrane and cytoskeletal events including a transformation of the cell surface from a microvillous to a lamellar topography. It is likely that dynamic properties of the IgE receptor contribute to the activation of these responses. Fewtrell and Metzger have established that limited crosslinking of IgE-receptor complexes is essential to trigger secretion. In addition, Baird and colleagues have reported that antigen binding causes a rapid immobilization of IgE-receptor complexes, and we have demonstrated an apparent increase with time in the affinity of IgE-receptor complexes for antigen.

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