scholarly journals Grasp Input Optimization Taking Contact Position and Object Information Uncertainties into Consideration

2012 ◽  
Vol 28 (5) ◽  
pp. 1170-1177 ◽  
Author(s):  
P. Fungtammasan ◽  
T. Watanabe
Keyword(s):  
Input Optimization ◽  
Contact Position

scholarly journals Movement Control Method of Magnetic Levitation System Using Eccentricity of Non-Contact Position Sensor

2021 ◽  
Vol 11 (5) ◽  
pp. 2396
Author(s):  
Jong Suk Lim ◽  
Hyung-Woo Lee
Keyword(s):  
Motor System ◽  
Control Method ◽  
Magnetic Levitation ◽  
Movement Control ◽  
Position Sensor ◽  
Semiconductor Wafer ◽  
Control Command ◽  
Levitation System ◽  
Magnetic Levitation System ◽  
Contact Position

This paper presents a method of utilizing a non-contact position sensor for the tilting and movement control of a rotor in a rotary magnetic levitation motor system. This system has been studied with the aim of having a relatively simple and highly clean alternative application compared to the spin coater used in the photoresist coating process in the semiconductor wafer process. To eliminate system wear and dust problems, a shaft-and-bearing-free magnetic levitation motor system was designed and a minimal non-contact position sensor was placed. An algorithm capable of preventing derailment and precise movement control by applying only control without additional mechanical devices to this magnetic levitation system was proposed. The proposed algorithm was verified through simulations and experiments, and the validity of the algorithm was verified by deriving a precision control result suitable for the movement control command in units of 0.1 mm at 50 rpm rotation drive.

scholarly journals Contact position analysis of deep brain stimulation electrodes on post-operative CT images

2009 ◽  
Vol 151 (7) ◽  
pp. 823-829 ◽  
Author(s):  
Simone Hemm ◽  
Jérôme Coste ◽  
Jean Gabrillargues ◽  
Lemlih Ouchchane ◽  
Laurent Sarry ◽  
...  
Keyword(s):  
Deep Brain Stimulation ◽  
Brain Stimulation ◽  
Ct Images ◽  
Position Analysis ◽  
Contact Position ◽  
Deep Brain

Evolution of the Spanish Relative Construction: Acquisition of National Features

2021 ◽  
pp. 24-31
Author(s):  
Nina Korbozerova ◽  
Olena Obruchnikova
Keyword(s):  
Main Part ◽  
Structural Organization ◽  
Spanish Language ◽  
The Other ◽  
Medieval Period ◽  
Old Spanish ◽  
Xvii Century ◽  
Other Hand ◽  
Contact Position

Complex attributive sentences in the Spanish language of the medieval period are characterized by a vague expression of the degree of syntactic subordination. During the XII-XVI centuries there is a process of constant enrichment of meanings and forms of complex attributive sentences. The final formation of the structural organization of a complex attributive sentence ended in the XVII century, in the period of unification and formation of the national Spanish language. Starting from the Old Spanish period, the externally formal homogeneity of models of a complex attributive sentence is disturbed by deep internal complications of semantic connections between the main and subordinate parts. Thus, in the Middle Spanish period, a complex attributive sentence gradually reformatted its structural organization by strengthening the contact position of the nominal center of subordination with the conjunctions and strengthening bilateral links between predicative components, which further contributed to the normalization of the position of the subordinate part. On the other hand, there is an intensive mutual replacement of some conjunctions with others. In the Old Spanish period, the conjunctions bigan to lose their uncoordinated lexical correlation between the correlative word and the supporting noun in the main part. This trend contributed to the consolidation of the structural organization of a complex attributive sentence, which was realized in the early Spanish period.

The Impact of Contact Position on the Retention Performance in Thin Film Ferroelectric Transistors

2021 ◽  
Author(s):  
Qiusong Chen ◽  
Dong Lin ◽  
Qinhao Wang ◽  
Jiang Yang ◽  
Juan E. Sanchez ◽  
...  
Keyword(s):  
Thin Film ◽  
Retention Performance ◽  
Contact Position ◽  
The Impact

Microgripper-Embedded Fluid Fingertip-Enhancing Positioning and Holding Abilities for Versatile Grasping

2017 ◽  
Vol 9 (6) ◽  
Author(s):  
Toshihiro Nishimura ◽  
Yoshinori Fujihira ◽  
Tetsuyou Watanabe
Keyword(s):  
Position Control ◽  
Layer Structure ◽  
Outer Part ◽  
Robotic Hand ◽  
Mechanical Constraints ◽  
Grasping Forces ◽  
Geometrical Constraints ◽  
Grasping Force ◽  
Object Shapes ◽  
Contact Position

This paper presents a novel fingertip system with a two-layer structure for robotic hands. The outer part of the structure consists of a rubber bag filled with fluid, called the “fluid fingertip,” while the inner part consists of a rigid link mechanism called a “microgripper.” The fingertip thus is a rigid/fluid hybrid system. The fluid fingertip is effective for grasping delicate objects, that is, it can decrease the impulsive force upon contact, and absorb uncertainties in object shapes and contact force. However, it can only apply a small grasping force such that holding a heavy object with a robotic hand with fluid fingertips is difficult. Additionally, contact uncertainties including inaccuracies in the contact position control cannot be avoided. In contrast, rigid fingertips can apply considerable grasping forces and thus grasp heavy objects effectively, although this makes delicate grasping difficult. To maintain the benefits of the fluid fingertip while overcoming its disadvantages, the present study examines passively operable microgripper-embedded fluid fingertips. Our goal is to use the gripper to enhance the positioning accuracy and increase the grasping force by adding geometrical constraints to the existing mechanical constraints. Grasping tests showed that the gripper with the developed fingertips can grasp a wide variety of objects, both fragile and heavy.

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