The Fault-Tolerant Control of Magnetic Bearings With Reduced Controller Outputs

The fault-tolerant control scheme utilizes grouping of currents to reduce the required number of controller outputs. Reduced current distribution matrices can be calculated with the constraint conditions of the controller outputs and the necessary condition for linearization. Decoupling chokes are not required for the control scheme with grouped currents since fluxes are isolated in C-cores. By reducing controller outputs and removing decoupling chokes the fault-tolerant control scheme is more efficient and practical in terms of industrial applications. @DOI: 10.1115/1.1369356#

[1]  R. R. Humphris,et al.  Practical limits to the performance of magnetic bearings: peak force, slew rate, and displacement sensitivity , 1989 .

[2]  Alan Palazzolo,et al.  Fault tolerance of magnetic bearings with material path reluctances and fringing factors , 2000 .

[3]  H. Habermann,et al.  Control: Practical magnetic bearings: Electronically controlled electromagnets support spinning 1100-kg shafts to micrometer accuracy , 1979, IEEE Spectrum.

[4]  Eric H. Maslen,et al.  Fault tolerance of magnetic bearings by generalized bias current linearization , 1995 .

[5]  J. D. Knight,et al.  Determination of Forces in a Magnetic Bearing Actuator: Numerical Computation With Comparison to Experiment , 1992 .

[6]  Paul E. Allaire,et al.  Digital Control of Magnetic Bearings Supporting a Multimass Flexible Rotor , 1990 .

[7]  Alan Palazzolo,et al.  Optimized Realization of Fault-Tolerant Heteropolar Magnetic Bearings , 2000 .

[8]  P. E. Allaire,et al.  Active Vibration Control of a Single Mass Rotor on Flexible Supports , 1983 .

[9]  Paul E. Allaire,et al.  Design and test of a magnetic thrust bearing , 1989 .

[10]  F. Matsumura,et al.  System modeling and control design of a horizontal-shaft magnetic-bearing system , 1986 .

[11]  Paul E. Allaire,et al.  Measured Force/Current Relations in Solid Magnetic Thrust Bearings , 1997 .

[12]  Ryohei Yokoyama,et al.  Effect of Steam-Injected Gas Turbines on the Unit Sizing of a Cogeneration Plant , 1997 .

[13]  Eric H. Maslen,et al.  Fault tolerant magnetic bearings , 1999 .