Synthesis of Spring Parameters to Satisfy Specified Energy Levels in Planar Mechanisms

1977 ◽  
Vol 99 (2) ◽  
pp. 341-346 ◽  
Author(s):  
G. K. Matthew ◽  
D. Tesar

The potential energy storage capabilities of linear springs are integrated with the nonlinear motion of mechanisms to provide approximation of desired counter-loading functions. The approximating function is required to be identical to the desired function at a number of precision points. The work is directly analogous to the algebraic form of kinematic synthesis, thus enabling an immediate conceptual grasp by those already familiar with kinematics.

1981 ◽  
Vol 103 (4) ◽  
pp. 758-763 ◽  
Author(s):  
J. N. Griffin ◽  
G. K. Matthew

The potential energy storage of linear springs and the kinetic energy storage of a body in motion are associated with the nonlinear motion of planar mechanisms to provide precision point control of desired dynamic phenomena. The work is closely analogous to synthesis of constraint links for pure kinematics problems.


2019 ◽  
Vol 118 (2) ◽  
pp. e1597199
Author(s):  
Lulu Zhang ◽  
Daguang Yue ◽  
Juan Zhao ◽  
Yuzhi Song ◽  
Qingtian Meng

Author(s):  
Karl Irikura

When computing the potential-energy curve of a diatomic molecule for predictive spectroscopy, high-level calculations are usually desired. The best calculations are expensive, so few points are usually available. The points are fitted to a continuous function, such as a polynomial. Ro-vibrational energy levels are then computed using the fitted function, and spectroscopic constants extracted. However, there may be problems with overfitting, with inadequate flexibility of the fitting function, or with dependence of results upon the choice of fitting function. More fundamentally, the fitting function is selected using aesthetics or convenience, instead of physics. Here we suggest using a lower-level, high-resolution ab initio potential as a guide. Instead of fitting the sparse, high-level data directly, the energy differences between the high-level points and the guiding potential are fitted. The results are improved even with an inexpensive guiding potential. This simple strategy involves little additional effort and can be recommended for routine use. It is similar to some interpolation strategies in the literature of polyatomic molecules. When the guiding potential extends beyond the high-level data, extrapolations are also improved.


2014 ◽  
Vol 2 (47) ◽  
pp. 20345-20357 ◽  
Author(s):  
Anil Kumar ◽  
Mahima Khandelwal

Novel ultrathin graphene sheets (0.41 ± 0.03 nm) with increased sp2 character, high specific capacitance and charge–discharge capability have been synthesized and demonstrated to have potential energy storage applications.


2019 ◽  
Vol 21 (25) ◽  
pp. 13766-13775 ◽  
Author(s):  
Xixi Hu ◽  
Junxiang Zuo ◽  
Changjian Xie ◽  
Richard Dawes ◽  
Hua Guo ◽  
...  

A full-dimensional potential energy surface for HO3, including the HO + O2dissociation asymptote, is developed and rigorous quantum dynamics calculations based on this PES have been carried out to compute the vibrational energy levels of HO3.


2013 ◽  
Vol 42 (45) ◽  
pp. 15877 ◽  
Author(s):  
Kuo-Hui Wu ◽  
Hiroaki Maeda ◽  
Tetsuya Kambe ◽  
Ken Hoshiko ◽  
Eunice Jia Han Phua ◽  
...  

2009 ◽  
Vol 130 (24) ◽  
pp. 244312 ◽  
Author(s):  
Andrei V. Nikitin ◽  
Filip Holka ◽  
Vladimir G. Tyuterev ◽  
Julien Fremont

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