| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic bearing device capable of optimally and stably controlling an LPV system under a strong gyro effect, continuously over the whole range of the number of revolutions. SOLUTION: This magnetic bearing device is designed on a linear matrix inequality(LMI) basis and has two H∞compensator K (θmax ) and K (θmin ) satisfying projection optimization and used for the different number of revolutions. Each H∞compensator is connected in parallel after multiplied by factorsα1 andα2 obtained from an interpolation. Furthermore, the output values of both H∞compensators are added. In this case, the factorsα1 andα2 are continuously changed so that a total thereof becomes equal to 1 dependent on a speedω2 measured with a speed sensor 16 on the basis of the interpolation. Furthermore, a difference between a radial position measured with a radial position sensor 8 and an instruction value (r) is computed and the LMI gain schedule H∞calculation is performed on the basis of the difference.
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