منابع مشابه
Vibration Isolation for Scanning Tunneling Microscopy
Scanning Tunneling Microscopy measures tunneling current from conducting surfaces. Through analysis, it is possible to make a three dimensional picture accurate on an atomic scale of a surface and probe microscopic phenomenon. The procedure is dependent on the distance between the surface of the microscope tip and the sample surface. High tolerances on a scale less than an angstrom are required...
متن کاملDecentralized control for multichannel active vibration isolation
This paper describes a theoretical and experimental investigation into an active four-mount vibration isolation system, in which electromagnetic actuators are installed in parallel with each of the four passive mounts placed between a three-dimensional piece of equipment and a vibrating base structure. Decentralized velocity feedback control is applied, where each actuator is operated independe...
متن کاملVibration Isolation Treatments for Coordinate Measuring Machines
This paper was presented at: • SME (Society of Manufacturing Engineers), June 1993, Nashville, Tenn • International Conference on Structural Dynamics, Vibration, Noise, and control, December 1995, Hong Kong. • InterNoise ’96 (1996 International Congress on Noise Control Engineering), August 1996, Liverpool, U.K. • This paper is also printed in “Mfg.”, which is the Brown and Sharpe in-house tech...
متن کاملVibration Isolation of Precision Objects
The need for vibration isolation of precision and vibrationsensitive objects is increasing continuously. Vibration isolation systems must comply with contradictory specifications, such as requiring reduced stiffness of isolators for better isolation, but higher stiffness for better performance of the object. Recently, expensive active isolation systems have been used to resolve these contradict...
متن کاملA Very Low Temperature Vibration Isolation System
Very low temperature refrigerators are a significant source of low frequency vibrational and acoustic noise, which is a serious challenge to research using high sensitivity mechanical oscillators, or to high resolution scanning tunneling microscopes. We describe the design and operation of a vibration isolation system which is used at very low temperatures. The system consists of four masses su...
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ژورنال
عنوان ژورنال: Microscopy Today
سال: 1997
ISSN: 1551-9295,2150-3583
DOI: 10.1017/s1551929500061472