Nanhu Chen

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Fast steering mirrors are used in many optical system applications, ranging from image tracking and scanning, to laser material processing, to jitter stabilization in optical communication. This paper presents a systematic approach to the modeling and feedback control design for a high performance fast steering mirror used for image scanning in a(More)
Motion systems for optical and manufacturing applications have demanding performance requirement in terms of speed and precision. Linear system description alone is often inadequate to meet the design and performance assessment requirements. Linear parameter varying (LPV) formulation is a promising approach to address system nonlinearity by using a family(More)
In digital system, a full-closed-loop configuration using a tachometers and an analog-digital converter with low resolution results in bad speed control and therefore influences the positioning performance in a high-precision positioning system. However, on the other hand, speed information cannot be accurately obtained through the encoder using traditional(More)
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