Servo-hydraulic test equipment for generating vibration. Method of describing characteristics

1990 ◽  
2021 ◽  
Vol 769 (4) ◽  
pp. 042051
Author(s):  
Zhenguo Zhang ◽  
Huixing Feng ◽  
Weihua Zhao ◽  
Maochao Li ◽  
Xiaobing Xu ◽  
...  

Abstract Nuclear vessel hydrostatic test is an important means of sealing and pressure resistance, because the nuclear vessel hydrostatic test involves important system and key equipment, how to optimize the nuclear vessel hydraulic test is a worthy topic. This paper discusses how to optimize nuclear vessel hydrostatic test technology, mainly from three aspects to optimize, such as the optimization of working ticket logic, the optimization of vessel hydrostatic test implementation, and the optimization of hydrostatic test equipment. Optimization of hydrostatic test scheme provides significance reference for plant maintenance.


2018 ◽  
Author(s):  
Michael H. Azarian

Abstract As counterfeiting techniques and processes grow in sophistication, the methods needed to detect these parts must keep pace. This has the unfortunate effect of raising the costs associated with managing this risk. In order to ensure that the resources devoted to counterfeit detection are commensurate with the potential effects and likelihood of counterfeit part usage in a particular application, a risk based methodology has been adopted for testing of electrical, electronic, and electromechanical (EEE) parts by the SAE AS6171 set of standards. This paper provides an overview of the risk assessment methodology employed within AS6171 to determine the testing that should be utilized to manage the risk associated with the use of a part. A scenario is constructed as a case study to illustrate how multiple solutions exist to address the risk for a particular situation, and the choice of any specific test plan can be made on the basis of practical considerations, such as cost, time, or the availability of particular test equipment.


Author(s):  
Carl M. Nail

Abstract Dice must often be removed from their packages and reassembled into more suitable packages for them to be tested in automated test equipment (ATE). Removing bare dice from their substrates using conventional methods poses risks for chemical, thermal, and/or mechanical damage. A new removal method is offered using metallography-based and parallel polishing-based techniques to remove the substrate while exposing the die to minimized risk for damage. This method has been tested and found to have a high success rate once the techniques are learned.


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