scholarly journals Operation and maintenance manual for the common video end effector system (CVEE) system 6260

1996 ◽  
Author(s):  
A.F., Westinghouse Hanford Pardini
Keyword(s):  
End Effector ◽  
Operation And Maintenance ◽  
Effector System ◽  
The Common

Inverse position analysis, workspace determination and position synthesis of parallel manipulators with 3-RSR topology

Robotica ◽  
2003 ◽  
Vol 21 (6) ◽  
pp. 627-632 ◽  
Author(s):  
Raffaele Di Gregorio
Keyword(s):  
Parallel Manipulators ◽  
End Effector ◽  
New Approach ◽  
Position Analysis ◽  
Starting Point ◽  
Inverse Position Analysis ◽  
The Common ◽  
Three Degree Of Freedom ◽  
Position Synthesis

Manipulators with 3-RSR topology are three-degree-of-freedom parallel manipulators that may be either spherical or mixed-motion manipulators. The inverse position analysis (IPA) and the workspace determination of 3-RSR manipulators are addressed by means of a new approach. The new approach is centered on a particular form of the closure equations called compatibility equations. The compatibility equations contain only the six coordinates (end-effector coordinates) which locates the end-effector pose (position and orientation) with respect to the frame, and the geometric constants of the manipulator. When the manipulator geometry is assigned, the common solutions of the compatibility equations are the end-effector coordinates which identify the end-effector poses belonging to the manipulator workspace. Moreover, they can be the starting point to easily solve the IPA. The presented compatibility equations can be also used to solve the position synthesis of the 3-RSR manipulator. This way of solving the position synthesis will demonstrate that only approximated solutions exist when more than eight end-effector poses are given.

Interference Determination for Parallel Cable-Driven Robots

2011 ◽  
Vol 308-310 ◽  
pp. 2013-2018
Author(s):  
Yu Su ◽  
Jian Wei Mi ◽  
Yuan Ying Qiu
Keyword(s):  
Interference Condition ◽  
End Effector ◽  
Interference Region ◽  
The Common

This paper develops an approach to overcome the misjudgment and omission problems of determining interference for parallel cable-driven robots, which is essential to clear interference classification in the first place. According to the clear classification, interference condition between a cable and a cable or a cable and an edge of the end-effector has been derived according to all kinds of position relations between the feet of the common perpendicular; the on a cable with a plane of the end-effector has been proved. Compared with the existing approaches, the proposed method can determine the interference region more reasonably.

scholarly journals The pigmentary effector system. III.—Colour response in the hypophysectomised frog

1923 ◽  
Vol 95 (664) ◽  
pp. 15-31 ◽  
Keyword(s):  
Large Body ◽  
The Body ◽  
Common Frog ◽  
Normal Reaction ◽  
Nerve Section ◽  
The Past ◽  
Effector System ◽  
Satisfactory Account ◽  
The Common ◽  
Endocrine Factors

The synchronous character of colour response in all parts of the body among the Amphibia has prompted a large body of investigators to seek for the existence of some co-ordinating mechanism underlying the normal reaction of the chromatophores. Nevertheless, no satisfactory account of such a mechanism has yet been put forward. The failure of earlier efforts is chiefly explicable for two reasons. Partly because, when the physiology of pigmentary changes first seriously excited interest, in the fifties and sixties of the last century, attention had not as yet become directed by the discoveries of Schafer and others to the alternative of endocrine factors in controlling colour response independently of the nervous system. And though the action of adrenalin in promoting melanophore contraction had later suggested to several Continental workers such an interpretation, it has only become possible during the past two years, through the work of the present writers on post-pituitary extracts, to identify a second autacoid system tending to promote the opposite phase of melanophore expansion. That the minds of earlier investigators were unduly hampered by the desire to interpret the control of pigmentary response through nervous agencies must be regarded as the principal explanation of the variable results recorded by numerous and equally competent and reliable witnesses with regard to such straightforward issues as the effects of nerve section and stimulation upon the condition of the chromatophores. It is now proposed to complete the attempt to provide a coherent account of the pigmentary changes of the common frog by supplementing our previous studies on the pituitary melanophore reaction with a comparison between colour response in the normal and hypophysectomised frog.

A Novel End-Effector System to Enable Pro-Supination Movements During Robot-Assisted Upper-Limb Training

2019 ◽  
Vol 100 (12) ◽  
pp. e165
Author(s):  
Giuseppe La Rosa ◽  
Catherine Adans-Dester ◽  
Eric Fabara ◽  
Amy Blank ◽  
Paul Sassaman ◽  
...  
Keyword(s):  
Upper Limb ◽  
Robot Assisted ◽  
End Effector ◽  
Effector System

An efficient approach of handling and deposition of micro and nano entities using sensorized microfluidic end-effector system

2008 ◽  
Vol 147 (1) ◽  
pp. 6-16 ◽  
Author(s):  
Uchechukwu C. Wejinya ◽  
Yantao Shen ◽  
Ning Xi ◽  
King Wai Chiu Lai ◽  
Jiangbo Zhang
Keyword(s):  
End Effector ◽  
Efficient Approach ◽  
Effector System

scholarly journals An assessment on the parallel impacts of building information modeling and big data on project operation and maintenance

2019 ◽  
Vol 276 ◽  
pp. 02002
Author(s):  
Masoud Shayganmehr ◽  
Ehsan Saghatforoush
Keyword(s):  
Big Data ◽  
Construction Projects ◽  
Building Information Modeling ◽  
Information Modeling ◽  
Rfid Tags ◽  
Operation And Maintenance ◽  
Building Information ◽  
The Common ◽  
Common Problems ◽  
And Performance

Operation and maintenance challenges have always been pronounced in construction projects. Many solutions have been proposed to mitigate the common problems but the solution are not sufficient to get over the challenges, therefore, many software-based concepts such as Building Information Modeling have been unveiled to evaluate the construction prior to initiating the project and envision the potential challenges which exist on the way. For higher accuracy IT solutions can be accompanied with Building Information Modeling to leverage the performance and precision of modeling such as Big Data, data mining and even RFID tags, this paper aims to carry out an in-depth literature review on how BIM alongside with Big Data solutions have parallel impacts into higher efficiency and performance of operation and maintenance in construction projects.

Operation and Maintenance Solutions for Generator Water Cooling

2012 ◽  
Author(s):  
Matthias Svoboda ◽  
Robert Svoboda
Keyword(s):  
Water Chemistry ◽  
Power Plants ◽  
Copper Oxides ◽  
Water Cooling ◽  
Alkaline Ph ◽  
Chemical Cleaning ◽  
High Oxygen Content ◽  
Acid Cleaning ◽  
Operation And Maintenance ◽  
The Common

Plugging of copper hollow conductors in water cooled generators is an issue occasionally encountered in large nuclear, fossil and hydro powered power plants, causing load limitations or even unplanned shut-down. A response is the proper choice of stator water chemistry and of the purification systems. The common water chemistry regimes are with low or high oxygen content, and neutral or alkaline pH in the stator water. All these regimes have proven to work in the field, but none is without problems. This can be due to various causes. There is one common trait however: problems arise when the system is being exposed for any length of time to a regime it was not designed for. Stainless steel hollow conductors have only simple requirements on water chemistry. Hollow conductor plugging can lead to overheating and possibly to catastrophic failure, so swift action to remedy the situation is recommended. There are several options. Hot reverse flush can remove debris and temporarily open up the plugs, and mechanical cleaning can open totally blocked hollow conductors. There are several methods for chemical cleaning, the most common being different forms of acid cleaning and EDTA cleaning. The former has the disadvantage of dissolving base metal and brazing as well as the oxides, while the latter method manipulates less aggressive substances that only dissolve the copper oxides in the system.

Sign in / Sign up

Export Citation Format

Share Document