Autobalancing of Rotors
TL;DR: In this article, it was shown that plane rotors with one or two particles free to move, subject to viscous damping, exhibit autobalancing, a property attributed to non-autonomous systems possessing an hyperbolic stable fixed point in the (non-extended) phase space for an open domain in parameter space.
About: This article is published in Journal of Sound and Vibration.The article was published on 1986-12-22. It has received 61 citations till now. The article focuses on the topics: Dynamical systems theory & Fixed point.
Citations
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TL;DR: A review of the research work performed in real-time active balanc- ing and active vibration control for rotating machinery, as well as dynamic modeling and analy- sis techniques of rotor systems, is presented in this article.
Abstract: Vibration suppression of rotating machinery is an important engineering problem. In this paper, a review of the research work performed in real-time active balanc- ing and active vibration control for rotating machinery, as well as the research work on dynamic modeling and analy- sis techniques of rotor systems, is presented. The basic methodology and a brief assessment of major difficulties and future research needs are also provided.
227 citations
Cites background from "Autobalancing of Rotors"
...Bovik and Hogfors (1986) used perturbation theory to show that some fairly general rotor systems exhibit auto-balancing....
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TL;DR: A new approach is presented that compensates for transmitted force due to imbalance in an active magnetic bearing system by performing on-line identification of the physical characteristics of rotor imbalance and to use the identification results to tune a stabilizing controller.
Abstract: This paper presents a new approach, called adaptive autocentering, that compensates for transmitted force due to imbalance in an active magnetic bearing system. Under the proposed control law, a rigid rotor achieves rotation about the mass center and principal axis of inertia. The basic principle of this approach is to perform on-line identification of the physical characteristics of rotor imbalance and to use the identification results to tune a stabilizing controller. This approach differs from the usual strategy of adaptive feedforward compensation, which models the effect of imbalance as an external disturbance or measurement noise, and then cancels this effect by generating a synchronous reference signal. Unlike adaptive feedforward compensation, adaptive autocentering control is frequency independent and works under varying rotor speed. Performance of the control algorithm is demonstrated in simulation examples for the case of rigid rotors with static or dynamic imbalance.
175 citations
TL;DR: In this paper, a nonlinear bifurcation analysis of the dynamics of an automatic dynamic balancing mechanism for rotating machines is presented, where the principle of operation is to deploy two or more masses that are free to travel around a race at a fixed distance from the hub and, subsequently, balance any eccentricity in the rotor.
67 citations
TL;DR: In this paper, a ball-type balancer system installed on the high-speed disk drive in order to reduce radial vibrations of rotors caused by eccentricities of disk's center of gravity and circular runway of the ball balancer was designed.
64 citations
01 Jan 1991
TL;DR: An important form of vibration experienced by rotating machinery in a wide range of applications is that due to inherent unbalance, but emphasis is given to a review of techniques for the high-speed balancing of flexible shafts.
Abstract: An important form of vibration experienced by rotating machinery in a wide range of applications is that due to inherent unbalance. Rotating machinery may incorporate either rigid or flexible shaft...
63 citations
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