نتایج جستجو برای: stiction

تعداد نتایج: 277  

Journal: :Transactions of the Society of Instrument and Control Engineers 2004

Journal: :IEEJ Transactions on Sensors and Micromachines 1999

Journal: :Micromachines 2011
Christian A. Gutierrez Ellis Meng

We report the design, fabrication and characterization of micromachined Parylene structures for self-sealing liquid encapsulation applications. Automatic sealing is enabled through the use of an integrated annular-plate stiction valve which greatly reduces device footprint over in-plane configurations. We achieve automatic wafer-level liquid entrapment without using adhesives or processing at e...

2002
Anders Stenman Krister Forsman Fredrik Gustafsson

A method for detecting static friction (stiction) in control valves is proposed. The method is model-based and is inspired by ideas from the fields of change detection and multi-model mode estimation. Opposed to existing methods only limited process knowledge is needed and it is not required that the loop has oscillating behavior. The advantage of the method is illustrated in both numerical sim...

Journal: :IEICE Electronic Express 2005
Keiji Isamoto T. Makino A. Moroswa Chongho Chong Hiroyuki Fujita Hiroshi Toshiyoshi

We report a very simple and reliable method for making Self-Assembled Vertical Comb (SAVC) drive actuators by using the standard SOI bulk micro-machining processes. The initial angular offset of the movable combs is prepared by using the process stiction which occurs during drying process after sacrificial release. The optical scanner integrated with SAVC has shown good electrostatic scanning p...

Journal: :E3S web of conferences 2021

Control valve stiction is a common problem faced by the process industries, which can have strong adverse effect on profitable operation of plants. Although various detection methods based neural networks been proposed, few these studies considered performance use 2D representations signals. In this paper, such an approach pretrained convolutional network, AlexNet. The proposed network (CNN-SD)...

1998
S. L. Miller M. S. Rodgers G. LaVigne J. J. Sniegowski P. Clews D. M. Tanner K. A. Peterson

In order for the rapidly emerging field of MicroElectroMechanical Systems (MEMS) to meet its extraordinary expectations regarding commercial impact, issues pertaining to how they fail must be understood. We identify failure modes common to a broad range of MEMS actuators, including adhesion (stiction) and friction-induced failures caused by improper operational methods, mechanical instabilities...

2011
Babji Srinivasan Ulaganathan Nallasivam Raghunathan Rengaswamy

Oscillations in process plants degrade the performance of control loops resulting in poor product quality. Therefore, plant-wide oscillation diagnosis is an essential task to maintain the performance of control loops. In recent years, significant research has been performed on plant-wide oscillation diagnosis. It has been reported that the three major causes for oscillations in linear closed-lo...

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