Snap-through and stiffness adaptation of a multi-stable Kirigami composite module

2019 ◽  
Vol 182 ◽  
pp. 107750 ◽  
Author(s):  
Aditya Lele ◽  
Vishrut Deshpande ◽  
Oliver Myers ◽  
Suyi Li
Keyword(s):  
2020 ◽  
Vol 10 (12) ◽  
pp. 4358
Author(s):  
Xinghua Li ◽  
Jue Li ◽  
Xuan Wei ◽  
Xiaohuan Yang ◽  
Zhikun Su ◽  
...  

Freeform surface is one of the research focuses in the measurement field. A composite module is composed of a plane and rotating paraboloid. The composite module array can identify 21 geometric errors of the machine tool in a wide range, which is composed of several composite modules. Eliminating the error of the array itself is of great significance for improving measurement accuracy. For this reason, this paper proposed a noncontact method for calibrating the angle and position of the composite module array. This paper used a self-developed angle sensor to access corresponding information and established the mathematical model according to the freeform surface’s geometric characteristics to achieve calibration. In addition, the influence of array placement error on calibration was analyzed. The experimental results showed that the angle repeatability was within 0.4″ around the X-axis and within 0.3″ around the Y-axis, and the position repeatability was within 0.4 µm in the X direction and within 0.7 µm in the Y direction. The measurement comparison experiments with high-precision laser interferometer and uncalibrated array verified the correctness of the experimental results. This method provides an important reference for practical application and freeform surface array calibration, and creates conditions for the implementation of machine tool error detection.


Author(s):  
Taihei Yotsuya ◽  
Kouichi Murayama ◽  
Jun Miura ◽  
Akira Nakajima ◽  
Junichi Kawahata

A composite module construction method is to be examined reflecting one of the elements of construction rationalization of a future nuclear plant planned by Hitachi. This concept is based on accomplishments and many successes achieved by Hitachi through application of the modular construction method to nuclear power plant construction over 20 years. The feature of the composite module typically includes a planned civil structure, such as a wall, a floor, and a post, representing modular components. In this way, an increased level of rationalization is expected in the conventional large-scale nuclear plants. Furthermore, the concept aiming at the modularization of all the building parts comprising medium- or small-scale reactors is also to be examined. Additional aims include improved reductions in the construction duration and rationalization through use of the composite module. On the other hand, present circumstances in nuclear plant construction are very pressing because of economic pressures. With this in mind, Hitachi is pursuing additional research into the introduction of drastic construction rationalization, such as the composite module. This concept is one of the keys to successful future plant construction, faced with such a severe situation.


2013 ◽  
Vol 694-697 ◽  
pp. 1736-1741 ◽  
Author(s):  
Kai Cheng Qi ◽  
Peng Shang ◽  
Wei Liu ◽  
Jian Jun Zhang ◽  
Feng Gao

Most of the biped robots or humanoid robots developed so far have been designed with serialactuated mechanism. the ratio between power and weight has not been very good. Some abilities of the humanoid robot are dependent on the weakest motor just like the cannikin law. Most of the human joints are not serial-actuated but parallel-actuated except the knee joint which is a one DOF joint. In the study, two kinds of module are put forward: basic module and composite module, and the configurations of the joints and limbs are designed by these modules. Based on logic diagram, many kinds of the humanoid robot are structured with these joints and limbs. As an applicable example, the humanoid robot SJTU-HR1 is presented.


2006 ◽  
Vol 34 (Web Server) ◽  
pp. W541-W545 ◽  
Author(s):  
T. Waleev ◽  
D. Shtokalo ◽  
T. Konovalova ◽  
N. Voss ◽  
E. Cheremushkin ◽  
...  

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