Topic
Active vibration control
About: Active vibration control is a research topic. Over the lifetime, 6770 publications have been published within this topic receiving 76599 citations. The topic is also known as: active vibration damping.
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TL;DR: An up-to-date review of stick-slip vibration behavior in drillstrings is provided, grouping the references under the categories of passive vibration control and active vibration control.
Abstract: Stick-slip vibration presents one of the main problems in the quality of drilling performance limiting tool life and productivity. This type of vibration can be suppressed by means of many approaches, such as varying parameters and use of control tools. Although tremendous improvements have been made in overcoming this dysfunction, stick-slip vibration suppression remains a large problem in the drilling industry. This paper provides an up-to-date review of stick-slip vibration behavior in drillstrings. First, the phenomena and the modeling methods of stick-slip vibrations are reviewed. Then an overview of the approaches for stick-slip suppression in oilwell drillstrings is presented, grouping the references under the categories of passive vibration control and active vibration control. Literature related to passive control is grouped under the categories of optimization of bottom hole assembly (BHA) configurations, bit selection and bit redesign, and use of downhole tools. The contributions related to the...
67 citations
TL;DR: In this paper, the positive position feedback (PPF) was used to mitigate the vibration of the first four natural modes, in spite of the rigid body motions due to the free boundary conditions.
67 citations
Patent•
16 Nov 1976TL;DR: In this paper, an electrodynamic sensor unit and a drive unit are attached to a member subject to vibration, and the sensor unit provides a signal proportional to the vibration velocity, and this signal is utilized to govern the operation of the drive unit, which acts to reduce the vibration amplitude.
Abstract: An electrodynamic sensor unit and a drive unit are attached to a member subject to vibration. The sensor unit provides a signal proportional to the vibration velocity, and this signal is utilized to govern the operation of the drive unit, which acts to reduce the vibration amplitude.
66 citations
TL;DR: In this paper, a single magnetic actuator is used to estimate system characteristics and apply the optimum control force needed to minimize synchronous vibration, without prior knowledge of bearing or rotor characteristics or the distribution of out-of-balance forces.
Abstract: This paper develops the authors' earlier work on vibration control of multi-mode rotor-bearing systems. It shows how a single magnetic actuator can be used to estimate system characteristics and apply the optimum control force needed to minimize synchronous vibration. In the application considered here, a rotor is supported on oil-film bearings. The algorithm determines the optimum control force without prior knowledge of the bearing or rotor characteristics or the distribution of out-of-balance forces. A rig is described and used to illustrate the application of the theoretical work.
66 citations
TL;DR: In this article, an active vibration control of functionally graded piezoelectric material (FGPM) plate using a velocity feedback control method is used to obtain an effective active damping in the vibration control.
66 citations