Speed Tracking Control of Ultrasonic Motors via Sampled-Data H.INF. Control

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  • サンプル値H∞制御に基づく超音波モータの速度追従制御
  • サンプルチ Hムゲンダイ セイギョ ニ モトヅク チョウオンパ モータ ノ ソクド ツイジュウ セイギョ

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Abstract

In this paper we consider a synthesis problem of digital controller for speed tracking control systems of ultrasonic motors. In the previous work, continuous-time H control based synthesis involving Tustin transformation has been utilized to solve the problem, where it has been empirically known that over-estimation of modeling error is needed to avoid speed fluctuation in high frequency range. In this paper, it is shown that desirable performance can be obtained by sampled-data H control synthesis without such conservativeness in modelings.

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