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http://dx.doi.org/10.5050/KSNVN.2007.17.11.1102

Fault Tolerant Control of Homopolar Magnetic Bearings Using Flux Isolation  

Na, Uhn-Joo (경남대학교 기계자동화공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.17, no.11, 2007 , pp. 1102-1111 More about this Journal
Abstract
The theory for a fault-tolerant control of homopolar magnetic bearings is developed. New coil winding law is utilized such that control fluxes are isolated for an 8-pole homopolar magnetic bearing. Decoupling chokes are not required for the fault tolerant magnetic bearing since C-core fluxes are isolated. If some of the coils or power amplifiers suddenly fail, the remaining coil currents change via a distribution matrix such that the same magnetic forces are maintained before and after failure. Lagrange multiplier optimization with equality constraints is utilized to calculate the optimal distribution matrix that maximizes the load capacity of the failed bearing. Some numerical examples of distribution matrices are provided to illustrate the theory. Simulations show that very much the same dynamic responses (orbits or displacements) are maintained throughout failure events while currents and fluxes change significantly.
Keywords
Magnetic Bearings; Rotor Dynamics; Active Vibration Control;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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