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The modified Smith predictor is well known as an effective time-delay compensator for a plant with large time delays, and several papers on the modified Smith predictor have been published. The parametrization of all stabilizing modified Smith predictors for minimum-phase time-delay plants is obtained by Yamada and Matsushima. In addition, Yamada et al. expanded the result by Yamada and Matsushima...
The modified repetitive control system is a type of servo mechanism designed for a periodic reference input. Recently, the parametrization of all stabilizing modified repetitive controllers is obtained by Satoh and Yamada. Since the parametrization of all stabilizing modified repetitive controllers is obtained, we can express previous studies of modified repetitive control system in a uniform manner...
A multi-period repetitive control system is a type of servomechanism for a periodic reference input. Even if a plant does not include time-delay, the transfer function from the periodic reference input to the output and that from the disturbance to the output of the multi-period repetitive control system generally have an infinite number of poles. The purpose of this paper is to propose the concept...
In this paper, we examine the parametrization of all disturbance observers for time-delay plants. The disturbance observers have been used to estimate unknown disturbance in the plant. Several papers on design methods of disturbance observers for time-delay plants have been published. However, no paper examines the parametrization of all disturbance observers for time-delay plants. In this paper,...
In this paper, we examine a design method for modified Smith predictor for non-minimum-phase time-delay plants with multiple time-delays. The modified Smith predictor is well known as an effective time-delay compensator for a plant with large time-delay, and several papers on the modified Smith predictor have been published. The parametrization of all stabilizing modified Smith predictors for minimum-phase...
The multi-period repetitive control system is a type of servomechanism for periodic reference input. Even if the plant does not include time-delay, the transfer function from the reference input to the output and that from the disturbance to the output of the multi-period repetitive control system generally have an infinite number of poles. In order to specify the input-output characteristic and the...
The modified repetitive control system is a type of servomechanism for the periodic reference input. Using previously proposed modified repetitive controllers, even if the plants does not includes time-delay, the transfer function from the periodic reference input to the output and that from the disturbance to the output have an infinite number of poles. From the practical point of view, it is desirable...
In this paper, we consider the robust stability condition for single-input/single-output time-delay plants with new class of uncertainties. First of all, we define a class of uncertainties to be considered. The necessary and sufficient robust stability condition for time-delay plants with such class of uncertainties is presented. The relation between the time-delay plant and the nominal time-delay...
In this paper, we examine the parametrization of all stabilizing multi-period repetitive controllers for single-input/single-output time-delay systems with the specified input-output frequency characteristics. The multi-period repetitive controller is proposed by Gotou et al. to improve the disturbance attenuation characteristics of the modified repetitive controllers. The parametrization of all multi-period...
In this paper, we examine the parametrization of all stabilizing modified Smith predictors for certain class of non-minimum phase time-delay plants. The modified Smith predictor is well known as an effective time-delay compensator for a plant with large time-delay. Several papers on the modified Smith predictor have been published. In order to express the past studies of modified Smith predictor in...
In this paper, we examine the parametrization of all stabilizing repetitive controllers for multiple-input/multiple-output continuous time time-delay systems. Yamada, Satoh and Arakawa considered the parametrization of all stabilizing repetitive controllers for single-input/single-output time-delay systems. However, the parametrization by Yamada, Satoh and Arakawa cannot apply to multiple-input/multiple-output...
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