Results 201 to 210 of about 17,291 (260)

Vibration protection for rotating machinery

Electrical Engineering, 1944
Vibration protection becomes desirable for rotating machinery when it is operated with certain defects. Electric generators may be operated with a single ``ground'' on the rotating field circuit without harm but the potential hazards of a second ``ground'' at another point on the same circuit are so great that the need of protective equipment for ...
R. L. Webb, C. S. Murray
openaire   +1 more source

Microcombustors for Rotating Machinery

2009
To drive microscale rotating machinery such as a microengine, motor-compressor, or generator, energy must be added to the system. This can take many forms depending on the application, however, for an engine intended to be a primary power source; this is usually thermal energy.
C.M. Spadaccini, I.A. Waitz
openaire   +1 more source

Fault detection and diagnosis of rotating machinery

IEEE Transactions on Industrial Electronics, 2000
A model-based approach to the detection and diagnosis of mechanical faults in rotating machinery is studied in this paper. For certain types of faults, for example, raceway faults in rolling element bearings, an increase in mass unbalance, and changes in stiffness and damping, algorithms suitable for real-time implementation are developed and evaluated
Kenneth A. Loparo, Maurice L. Adams, Wei Lin 0001, M. Farouk Abdel-Magied, Nadar Afshari   +4 more
openaire   +1 more source

Fault detection and diagnosis in rotating machinery

SMC'98 Conference Proceedings. 1998 IEEE International Conference on Systems, Man, and Cybernetics (Cat. No.98CH36218), 2002
The detection and diagnosis of mechanical faults in rotating machinery using a model-based approach is studied. For certain types of faults, for example raceway faults in rolling element bearings, increase in mass unbalance and changes in stiffness and damping, algorithms suitable for real-time implementation are developed and tested.
Kenneth A. Loparo, Nadar Afshari, M. Farouk Abdel-Magied   +2 more
openaire   +1 more source

Balancing of Rotating Machinery

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 1991
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 shafts and balancing procedures for both cases are discussed, but emphasis is given to a review of techniques for the high-speed balancing of flexible shafts ...
openaire   +1 more source

Signal analysis for rotating machinery vibrations

Pattern Recognition, 1975
Abstract A novel method is proposed for the purpose of characterizing repetitive vibration signals. This consists in decomposing the signal into periodic—not necessarily harmonic—components. Two parameters are then sufficient for the description of each component. The appropriate signal processing technique is based on time domain averaging.
openaire   +1 more source

Fault Diagnosis of Rotating Machinery

The Shock and Vibration Digest, 1998
This paper aims to provide a broad review of the state of the art in fault diagnosis techniques, with particular regard to rotating machinery. Fault diagnosis is a subject too wide ranging to allow a comprehensive coverage of all of the areas associated with this field to be undertaken, and it is not the authors' intention to do so.
S. Edwards, A.W. Lees, M.I. Friswell
openaire   +1 more source

Shaft voltages and rotating machinery

Industry Applications Society 38th Annual Petroleum and Chemical Industry Conference, 1993
In order to determine whether a machine is experiencing shaft voltage and current problems, recognition of the four types of damage is imperative. The four distinct types of shaft current damage, frosting, spark tracks, pitting, and welding are described. The four shaft voltage sources and their means of generation are discussed in detail.
openaire   +1 more source

Automated Diagnostics of Rotating Machinery

Volume 4: Turbo Expo 2003, 2003
This paper provides an overview of the current available technologies for automated machinery condition evaluation and fault diagnosis within an overall plant asset management system. The paper presents a basic overview of an integrated plant asset management system, and focuses on the available technologies for automated diagnostics including ...
A. El-Shafei, N. Rieger
openaire   +1 more source

Metamodeling of Rotating Electric Machinery

IEEE Transactions on Energy Conversion, 2018
This work sets forth an approach whereby a system designer can rapidly estimate the size versus loss characteristics of a class of electric machinery, and the impact of this tradeoff at the system level. In essence, the methodology provides the first physics-based multiobjective scaling law for a Pareto-optimal front capturing the tradeoff between size
Scott D. Sudhoff, Raj Sahu
openaire   +1 more source