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Book, Wayne J.

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    Speed Control and Position Estimation of Small Hydraulic Cylinders for Digital Clay Using PWM Method
    (Georgia Institute of Technology, 2004-07) Zhu, Haihong ; Book, Wayne J.
    Digital Clay is a new generation 3D computer input and output device for surface shape and haptic effects. The device consists of arrays of fluidically actuated cells under the control of valves connected to two pressure reservoirs in a manner ultimately suitable to an implementation in MEMS technology. At the current stage, it is very difficult to implement a tiny position sensor into the tiny cell. This paper presents a control method for the speed and position estimation and control for the cells of digital clay only using low cost pressure sensors and without using any position-sensing device.