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Feasibility Study for a Laboratory Experiment about Time-Delayed Systems


A. Da Silva Fernandes

Semester Thesis, FS16 (10519)

In the past years, the Institut für Automatik at ETH Zürich has put a lot of effort into offering its students laboratory courses, that help them put their achieved theoretical knowledge from the courses into practice. Since systems with time-delays are commonly known for being challenging in control design, it makes sense to design a laboratory experiment that teaches students how to deal with such challenges. This semester thesis provides a brief feasibility study for said experiment using a tube, through which air flows. The air is heated on one side of the tube and the measurement is taken at the other end. This causes a time-delay between actuation and measurement. The system is modeled using a thermal equivalent circuit, which approximates it as a first order system. Simulations are made, which show the benefit of a Smith Predictor on time-delayed systems. The experimental setup is shown and the results and possible improvements are discussed. The thesis at hand shows that the experiment is realizable, but the used heating element causes a very high time constant in the system, slowing down the dynamics. Improving this behavior by finding a heating system with a much faster response time makes this experimental setup feasible.

Supervisors: Alexander Liniger, Sandro Merkli, Paul Beuchat, John Lygeros


Type of Publication:

(13)Semester/Bachelor Thesis

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% Autogenerated BibTeX entry
@PhdThesis { Xxx:2016:IFA_5446
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