Shiang-Hwua Yu

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The carrier-based pulsewidth modulation (PWM) is extended to a dither-based PWM by replacing a conventional triangular carrier with a binary dither signal. Such a simple extension is generally impractical due to serious performance degradation. However, this paper presents a novel binary dither generator that helps enhance the performance of the(More)
In this paper, three digital model-matching techniques in H2, H1, and l1 performance measures are applied to design digital feedforward controllers for active noise cancellation in ducts. Different measures account for different optimization objectives in terms of physical signals. The distributed nature and high-bandwidth requirements of the control system(More)
This paper introduces a straightforward analysis of a 1-bit noise-shaping quantizer using variable structure control methods. The method using the concept of equivalent control to access the bound on state signals when the sliding condition is reached. Simulation examples and an experimental circuit using off-the-shelf electronic components are given to(More)
This paper presents a direct torque control (DTC) scheme using space vector modulation (SVM) to achieve high performance speed control of a permanent magnet synchronous motor. Based on the concept of a field-oriented control principle, a Proportional-integral (PI) flux controller is first established to achieve fast direct flux control and then cascade(More)