Proceedings ArticleDOI
Analysis of multi-rate discrete equivalent of continuous controller
Josep Tornero,Yuping Gu,Masayoshi Tomizuka +2 more
- Vol. 4, pp 2759-2763
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TLDR
The analysis of multi-rate controllers, which update the controller output faster than the measurement sampling frequency by a factor of N, is concerned, and the discrete time controller is obtained as its zero order hold equivalent.Abstract:
The paper is concerned with the analysis of multi-rate controllers, which update the controller output faster than the measurement sampling frequency by a factor of N. The controlled system is continuous, and the discrete time controller is obtained as its zero order hold equivalent. After deriving a set of equations necessary for analysis and design of multi-rate systems, the open loop characteristics of the multi-rate controller and the closed loop characteristics are examined. Several physical meanings can be derived from the formulation of the multi-rate controller.read more
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Digital redesign of continuous time controller by multirate sampling and high order holds
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References
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Journal ArticleDOI
I and i
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Journal ArticleDOI
Multivariable multirate sampled-data systems: State-space description, transfer characteristics, and Nyquist criterion
Mituhiko Araki,K. Yamamoto +1 more
TL;DR: The contents of the paper will be useful to extend the modern results about continuous-time and single-rate sampled-data control systems to the multirate sampled- data case and extensions of the INA method and of the robust stability conditions will be straightforward.
Journal ArticleDOI
Multirate digital control system design
TL;DR: Methods for multirate digital control system design, sampling rate selection, discretization, and synthesis methods are applied to two example design problems andMultirate and single-rate compensators synthesized by the different methods are compared based on closed-loop responses with compensators having the same real-time computation load.
Proceedings ArticleDOI
Multirate state-space digital controller for sector servo systems
TL;DR: In this article, the authors describe the design, performance analysis, and test results of a type of a multirate digital controller for actuator and voice coil motor (VCM) control in disk drives using sector servo systems.
Journal ArticleDOI
Brief paper: Dual-rate adaptive control
TL;DR: An operator, called the dual-rate transfer function, describing aDual-rate discretized continuous-time system is presented, and two adaptive control strategies are outlined, and some results are illustrated by a simple example.