scholarly journals STATEMENT OF OPTIMAL SYNTHESIS PROBLEM FOR AUTONOMOUS HIGH-ACCURACY RESISTANT TO DISTURBANCE STABILIZATION AND COURSE SYSTEM

2010 ◽  
Vol 44 (3) ◽  
Author(s):  
Olga A. Sushchenko ◽  
Dmitro O. Lutzko
Keyword(s):  
High Accuracy ◽  
Optimal Synthesis ◽  
Synthesis Problem

Optimal Synthesis of Four-Bar Linkages for Four-Position Rigid-Body Guidance With Selective Tolerance Specifications

1992 ◽  
Author(s):  
Shankar C. Venkataraman ◽  
Gary L. Kinzel ◽  
Kenneth J. Waldron
Keyword(s):  
Rigid Body ◽  
Solution Space ◽  
Optimal Synthesis ◽  
Synthesis Problem ◽  
Manufacturing Processes ◽  
Synthesis Techniques

Abstract In practical rigid-body guidance problems, very often one or more of the design positions need not be generated exactly. Further, extreme accuracy at the design positions is somewhat pointless considering the inherent limitations in linkage manufacturing processes. This emphasizes the requirement of synthesis techniques to be able to handle tolerance specifications on the nominal design positions. A favorable offshoot of the tolerance incorporation would be the accompanying increase in the solution space of the synthesis problem thereby yielding better linkage solutions.

Kinetostatic Synthesis of Coupled Serial Chains

1998 ◽  
Author(s):  
Venkat Krovi ◽  
G. K. Ananthasuresh ◽  
Vijay Kumar
Keyword(s):  
Virtual Work ◽  
Degree Of Freedom ◽  
Optimal Synthesis ◽  
Synthesis Problem ◽  
Equilibrium Equations ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Angular Velocities ◽  
Kinematic Loop ◽  
Serial Chains

Abstract Single Degree-of-freedom Coupled Serial Chain (SDCSC) mechanisms are a novel class of modular and compact mechanisms with single degree-of-freedom actuation and control. In this paper, the kinetostatic synthesis of SDCSC mechanisms is addressed. Using the principle of virtual work, the static force equilibrium equations are developed for two-link SDCSCs. These are combined with the previously developed kinematic loop-closure equations to solve the kinetostatic precision point synthesis problem. Since the ratios of the angular velocities at the joints are constants by virtue of cable-pulley coupling in SDCSCs, it possible to render the kinetostatic equations linear in terms of the mechanism parameters. As a result, the solution of the precision point synthesis problem of SDCSCs becomes simpler compared to that of the four-bar mechanism. In order to meet additional criteria such as minimizing the maximum torque required over the entire range of motion of the mechanism, an optimization problem is formulated. The free choices in the precision point synthesis are used as variables in the optimal synthesis problem. The paper also addresses how torsional springs at the joints can be utilized to reduce the required input torque in supporting a specified load at the end-effector. Numerical examples are presented to illustrate the precision point and the optimal synthesis of two-link SDCSC mechanism with and without torsional springs at the joints.

Optimal Synthesis Problem Relative to Domain Evolution

2013 ◽  
Vol 45 (2) ◽  
pp. 50-56
Author(s):  
Fikret Akhmed Ali Ogly Aliev ◽  
Aghaddin A. Niftiyev ◽  
Javanshir I. Zeynalov
Keyword(s):  
Optimal Synthesis ◽  
Synthesis Problem ◽  
Domain Evolution

Optimal synthesis problem for the fuzzy systems

2010 ◽  
Vol 32 (6) ◽  
pp. 660-667 ◽  
Author(s):  
F. A. Aliev ◽  
Aghaddin Aslan Niftiyev ◽  
C. I. Zeynalov
Keyword(s):  
Fuzzy Systems ◽  
Optimal Synthesis ◽  
Synthesis Problem

A New 1,000 kV Electron Microscope

1967 ◽  
Vol 25 ◽  
pp. 260-261
Author(s):  
M. Nishigaki ◽  
S. Katagiri ◽  
H. Kimura ◽  
B. Tadano
Keyword(s):  
Electron Microscope ◽  
High Voltage ◽  
Basic Research ◽  
Chromatic Aberration ◽  
High Accuracy ◽  
Biological Specimen ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
High Voltage Electron

The high voltage electron microscope has many advantageous features in comparison with the ordinary electron microscope. They are a higher penetrating efficiency of the electron, low chromatic aberration, high accuracy of the selected area diffraction and so on. Thus, the high voltage electron microscope becomes an indispensable instrument for the metallurgical, polymer and biological specimen studies. The application of the instrument involves today not only basic research but routine survey in the various fields. Particularly for the latter purpose, the performance, maintenance and reliability of the microscope should be same as those of commercial ones. The authors completed a 500 kV electron microscope in 1964 and a 1,000 kV one in 1966 taking these points into consideration. The construction of our 1,000 kV electron microscope is described below.

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