Flexible Mount Research Articles

Office Task Lighting: A user study of six task lights by five workers with low vision

This paper makes a subjective assessment of six task lights in an office environment. Five people with low vision used each task light for a week in their workplace and completed a questionnaire. The main findings suggest tha people prefer a light source that does not get hot and on a flexible mount that produces an even area of illuminance. If the source is too close to the task then unevenness and heat are likely to be a problem. People appear willing to pay up to three times as much for a fluorescent task light on a 92 cms long jointed mount with an adjustable head as for a hot tungsten or tungsten halogen bulb in a small shade on a short (40 to 60 cms) inflexible mount.

Study of Accuracy of Inertial Stabilization System. 2nd Report, Instability caused by a Flexible Mount and Measures to Avoid the Phenomenon.

Flexibility of payload mount in inertial stabilization system often exists, partly because nonrigid drive mechanism, support and/or platform, and partly because inserted vibration isolator. The mount flexibility, however, can cause severe instability of the stabilization control system, and thus introduces an adverse effect on system performance. This paper analytically reveals the mechanism of instability caused by the flexibility of mount, assuming spring and viscous coupling between payload and mount. A dual flexibility model on both payload and mount is also treated, and its theoretical transfer function is compared to the data obtained from a real stabilization system. Based on the results, measures to avoid instability in the presence of mount flexibility are proposed.

Adaptive vibration control for structural mounting systems

It is often desired to isolate a source of structural vibration from surrounding structures. Typically, the vibrating structure is attached to the foundation via some form of passive, flexible mount, as a means of accomplishing the desired objective. One weakness common to all passive schemes is that they produce relatively little (or no) vibration reduction at the lower frequencies. Active control provides a means of compensating for this weakness to achieve good vibration isolation over a wide frequency range. In this study, adaptive closed-loop control has been combined with passive control to give both active reduction at the lower frequencies and passive reduction at the higher frequencies. The adaptive nature of the controller allows the controller to converge to the optimal solution, as well as to track any variations in the system parameters that may occur. A controller has been developed, based on the LMS algorithm, and investigated to determine its stability and convergence properties. As well, the mechanical coupling that occurs when multiple control actuators are used has been studied. Real-time experimental results have been obtained from mounted vibrating structures, using a high-speed digital signal-processing board to run the control algorithm.

Flexible transducer mount

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The influence of pneumatic damping on the performance of a flexible foam vibration isolator

Theoretical equations are established relating the transmissibility of a liquid-filled, flexible open-cell foam antivibration mount to the dimensions of the mount and the geometry and mechanical properties of the foam. The transmissibility of a foam mount is calculated by using experimentally determined values for the system parameters and compared with that for solid rubber mounts.

An Artificial Rumen System for Range Nutrition Studies

the plastic. A backing sheet is pressed in place, and the mount is trimmed to size on a paper cutter. Another sheet of adhesive plastic makes the best backing but increases t h e cost. This makes a completely waterproof and flexible mount. Acetate plastic, tracing cloth, and botany paper all make satisfactory backing material at much less cost. Self-laminating plastic is available from most stationers and office suppliers in a variety of weights and sizes. Prices vary from 40 to 75 cents per square foot. Materials for a 4 by 6 inch mount using botany paper backing costs about 12 cents.

A flexible mount for specimens in single crystal and powder X-ray cameras

A flexible mount for specimens in single crystal and powder X-ray cameras