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What's new and what's old with reset control

The 1950's saw a number of new controllers proposed using hard nonlinearities such as limiters, saturation and reset mechanisms. In the 70ís, additional contributions, tailored to the class of resetting controllers such as the Clegg integrator (1958), resulted in a much improved design technique. In this seminar, following a short review of past work, we present recent work on the feedback connection of these controllers with linear plants. We first motivate the use of reset control through theory and experiments. For example, we give conditions under which linear feedback control of a plant containing integrator must overshoot and construct an example of reset control that does not overshoot under such constraints. The experimental work includes a flexible mechanical system and a tape backup. We then summarize some of our recent results that establish classic performance properties ranging from quadratic and BIBO stability to steady-state and transient performance.
Type of Seminar:
Public Seminar
Prof. Yossi Chait
Mechanical & Industrial Engineering Department University of Massachusetts Amherst, MA 01003, USA
Aug 22, 2001   17:15

ETH Zentrum, ETZ E6, Gloriastrasse 35, 8006 Zurich
Contact Person:

Prof. L. Guzzella
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Biographical Sketch:
EDUCATION Ph.D. Mechanical Engineering, Michigan State University, 1988. Thesis: Frequency Domain Robust Control of Distributed Parameter Systems. M.S. Mechanical Engineering, Michigan State University, 1984. Thesis: Active Control of Mechanical Vibration Utilizing Pneumatic Forces. B.S. Mechanical Engineering, The Ohio State University, 1982. PROFESSIONAL EXPERIENCE Visiting Professor (5/1996-7/1996) Laboratory for Measurement and Control, Delft University of Technology, Delft, The Netherlands. Visiting Professor (3/1996-4/1996) Department of Electrical Engineering - Systems, Tel Aviv University, Tel Aviv, Israel. Associate Professor (1994-present) Teaching responsibilities: undergraduate controls, vibration, dynamics and measurements courses; graduate control course. Director of Design and Analysis of Control Systems research laboratory. Department of Mechanical Engineering, University of Massachusetts. Assistant Professor (1988-1994) Same as above. Consultant (1986-present)Various companies in the USA and internationally. Teaching Assistant (1985-1986) Instructor, undergraduate control course. Instructor, undergraduate instrumentation lab. Mechanical Engineering Department, Michigan State University. Research Assistant (1984-1988) Manager of Noise and Vibration Lab, A.H. Case Center for CAE and Manufacturing, Michigan State University. Industrial (1985) Power Systems Department, General Motors -Research Labs, Warren, MI.