The future Compact LInear Collider (CLIC) currently under design at CERN (European Organization for Nuclear Research) would create high-energy particle collisions between electrons and positrons, and provide a tool for scientists to address many of the most compelling questions about the fundamental nature of matter, energy, space and time. In accelerating structure, it is well-established that...

Active vibration isolation from an arbitrarily, structurally complex receiver is considered with respect to the impacts of structure flexibility on the openand closed-loop system characteristics. Specifically, the generally weak influence of flexibility on the open-loop transfer function in case of total force feedback, in contrast to acceleration feedback, is investigated. The open-loop 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...

In order to solve the problems of large vibration and noise caused by unreasonable design rubber isolator electromagnetic vibrating feeder. Firstly, relationship between isolation performance system parameters is theoretically analyzed. Secondly, a multi-objective optimization function established with coefficient amplitude ratio as objectives. The genetic algorithm used optimize objective func...

The analysis of smart spring vibration isolation system is analyzed through MATLAB simulation. The results show suppressing dominant vibration mode of platform. In the paper controllers developed for the smart spring are linear and nonlinear. This paper deals with MIMO system analysis of low frequency dominant modes, which are critical, examined first by linear controller techniques and then wi...

One of the inherent characteristics of transportation systems, especially steel wheel and rail systems, is that vehicles running on the roadway or trackway generate vibration which transmits through the ground into nearby buildings. As our urban areas build up or are redeveloped, it is frequently desired for a variety of reasons to place a concert hall or theater in a location which is in close...

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...

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...

By attaching an electromagnetic transducer to a mechanical isolation system and shunting the terminals of the transducer with electrical impedance, we can provide improved isolation performance while eliminating the need for an additional sensor. Simulated and experimental results on a simple electro-mechanical isolation system show that the proposed controller is capable of peak damping and hi...