4 edition of Robust, accurate, and non-contacting vibration measurement systems found in the catalog.
Robust, accurate, and non-contacting vibration measurement systems
|Statement||prepared by T.C. Goodenow, R.L. Shipman, H.M. Holland ; prepared for Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission.|
|Contributions||Shipman, R. L., Holland, H. M., Epoch Engineering, Inc., U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Engineering.|
|The Physical Object|
the noise and/or vibration right up to the receptor position: Figure - How to Define the Source Level noise/vibration final result, but the "source be used for situations which Our pragmatic approach to this problem started by taking what we already knew. Transportation Noise Reference Book (Nelson)1 contains comprehensive methods and data. Command shaping is an important open-loop control method for improving the settling time and positioning accuracy. This technique also minimizes residual vibrations. Shaped command profiles are formed by convolving a sequence of impulses or solving special functions for the desired command signal. To determine the input shaper controller commands, estimated values of the system natural.
With the development of modern society, the scale of the power system is rapidly increased accordingly, and the framework and mode of running of power systems are trending towards more complexity. It is nowadays much more important for the dispatchers to know exactly the state parameters of the power network through state estimation. This paper proposes a robust power system WLS state. Whenever you need to measure with absolute precision in extreme conditions, you can count on the BTL robust magnetostrictive linear position sensors from Balluff. Our systems are made entirely of stainless steel and are designed in protection classes up to IP69K or for high pressure cylinder applications up to .
SOUND AND VIBRATION/APRIL 9 Hardware and software for accurate measurement of noise and vibration sig-nals have evolved considerably over the last decade or so. Until the mid s, multichannel data acquisition systems were relatively expensive. Driven by the audio industry, new electronics have been developed that revolutionize the. Non-contacting radar devices measure from the top down, have no moving parts and do not need calibration. The result is that you get reliable and accurate level readings regardless of changing process conditions. Due to the fact that the microwaves are sent out in free space, obstructions such as mixer blades are not an issue.
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W Diamond Ave SuiteGaithersburg, MD, DUNS: N/A HUBZone Owned: N. Despite a multitude of diagnostic methods, the industry standard RMS is still widely used.
Paper presents work toward algorithmic implementation of velocity RMS measurement according to ISO standard. Different approaches are discussed, including those based on frequency spectra of raw vibration data.
Considerations connected with problems specific to digital signals processing and Author: Paweł Kępski, Bartłomiej Greń, Tomasz Barszcz. Page 4 “B” Book Guide To Vibration Measurement Fig 3 - Modes are DISP, VEL and ACC. Fig 4 - VEL selected. Fig 5 - DISP selected. Fig 6 - ACC selected. Step 2 - Select a Mode The Mode is a vibration parameter you want to measure.
Balmac Vibration Meters have three modes: Displacement = DISP, Velocity = VEL and Acceleration = ACC. Velocity. Vibration Control and Actuation of Large-Scale Systems gives a systematically and self-contained description of the many facets of envisaging, designing, implementing, or experimentally exploring advanced vibration control systems.
The book is devoted to the development of mathematical methodologies for vibration analysis and control problems. Robust, accurate, and non-contacting vibration measurement systems: Supplemental appendices presenting comparison measurements of the robust laser interferometer and typical accelerometer systems.
Volume 2Author: T.C. Goodenow, R.L. Shipman, H.M. Holland. Vibration Amplitude. The maximum amplitude or range of the vibration you are measuring determines the sensor range that you can use. If you attempt to measure vibration outside a sensor’s range, it distorts or clips the response.
Typically, accelerometers used to monitor high vibration levels have a lower sensitivity and lower mass. Sensitivity.
This book starts with an elementary description of the underlying physics and then builds up a more advanced treatment. Robust, accurate, and non-contacting vibration measurement systems. Robust, compact, shock-resistant, PC-based measurement system The Soundbook is MIL-STD F vibration- and shock-resistant.
Offering the perfect combination of performance and robustness Soundbooks is setting a new benchmark for PC-based measurement systems.
Stereophotogrammetry in conjunction with three-dimensional point tracking (3DPT) algorithms has proven to be a highly robust measurement technique when used to perform dynamic measurements on small, rotating systems. This measurement technique can be scaled up to much larger systems and has several desirable features for helicopter and wind.
Overall vibration measurements, usually expressed as the RMS value (except for displacement where peak-peak values apply), form the basis of condition monitoring measurements and trending, but have limited value for analysis.
The diagram on the previous page showed a typical value for vibration of g. Robust, accurate, and non-contacting vibration measurement systems: Summary of comparison measurements of the robust laser interferometer and typical accelerometer systems.
Volume 1 By T.C. Goodenow, R.L. Shipman and H.M. Holland. However a vibration sensor on the surface of detail changes the picture of detail vibration.
Problems of measurement are considered separately from problems of modeling [21 â€“ 24]. Even if a research uses non-contact method of vibration measurement [25 â€“ 26], there is no comparison of different vibration measurement systems. NON-CONTACT MEASURING SYSTEMS.
For ultra-precision position and displacement measurement applications, non-contact methods offer several advantages. They provide high dynamic response, measurement resolutions down to picometers, have low (or no) hysteresis, and can measure small, fragile parts with no risk of damaging delicate structures.
Contributed by the Dynamic Systems and Control Division for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the Dynamic Systems and Control Division October 4, Associate Technical Editor: N. Olgac. Currently, the majority of studies on vision-based measurement have been conducted under ideal environments so that an adequate measurement performance and accuracy is ensured.
However, vision-based systems may face some adverse influencing factors such as illumination change and fog interference, which can affect measurement accuracy.
This paper developed a robust vision-based. In many monitoring applications non-contacting eddy current displacement sensor (ECDS) systems are the preferred sensor choice for a wide range of monitoring tasks. They are typically used for measurement of relative shaft vibration and displacement, as well as for use as reference sensors.
Our ECDS systems can be divided into the following groups. Development of Electronic Vibration Measurement. Much of early vibration measurement was accomplished with physi-cal senses and mechanical devices. At some point the electro-mechanical, moving-coil velocity pickup appeared to provide quantifiable electronic measurement.
The velocity pickup was reasonably robust, self-generating and produced an. The measurement systems tolerate a horizontal and vertical offset of just a few millimeters. Features. High resolution of up to µm; Measuring lengths of up to mm; Measures several positions and speeds at the same time; Non-contacting, thus free from wear – no downtimes and a long service life.
This study reveals that stereophotogrammetry has significant potential as a robust non-contacting measurement technique for monitoring dynamic behavior of rotating helicopter rotors or wind. The preferred mode of vibration sensing is through in situ sensors like accelerometers attached on specific locations of the machine; however a significant benefit (with respect to legacy machines) will be derived if an accurate measurement can be done from a distance, without attaching the sensor on the machine parts.
Vibration measurement is sometimes used as an indirect measurement of some other value. The final measurement goal determines the approach to the measuringcondition monitoring– predicting or monitoring wear, fatigue, and failure – requires vibration measurements meant to determine the kinetic energy and forces acting upon an object.Correlated Solutions provides non-contact turn-key measurement systems from the VIC product line.
Various configurations of the VIC system are available depending on your applications including: high resolution (up to 29MP), high speed (up to 5MHz), strain and/or load control, infrared capability, microscopy (down to mm), fatigue testing, 3D transient vibration analysis, 3D full-field real.Optical Non-contacting Vibration Measurement of Rotating Turbine Blades II the overall accuracy of the system can be conservatively stated as 1/30, the field of view .
Multiple image sets provide a progressive measurement of structural deformation and strain. The method is extremely robust and has wide dynamic range that is not.