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State estimation for fast-switching solenoid valves : A study on practical nonlinear observers and new experimental results

  • Knowing the position of the spool in a solenoid valve, without using costly position sensors, is of considerable interest in a lot of industrial applications. In this paper, the problem of position estimation based on state observers for fast-switching solenoids, with sole use of simple voltage and current measurements, is investigated. Due to the short spool traveling time in fast-switching valves, convergence of the observer errors has to be achieved very fast. Moreover, the observer has to be robust against modeling uncertainties and parameter variations. Therefore, different state observer approaches are investigated, and compared to each other regarding possible uncertainties. The investigation covers a High-Gain-Observer approach, a combined High-Gain Sliding-Mode-Observer approach, both based on extended linearization, and a nonlinear Sliding-Mode-Observer based on equivalent output injection. The results are discussed by means of numerical simulations for all approaches, and finally physical experiments on a valve-mock-up are thoroughly discussed for the nonlinear Sliding-Mode-Observer.

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Author:Tristan BraunORCiD, Florian Straußberger, Johannes ReuterORCiD
Parent Title (English):20th International Conference on Methods and Models in Automation and Robotics (MMAR) : 24 - 27 Aug. 2015, Miedzyzdroje, Poland
Document Type:Conference Proceeding
Year of Publication:2015
Release Date:2018/02/27
Tag:valves; linearisation techniques; observers; solenoids
First Page:862
Last Page:867
Volltextzugriff für Hochschulangehörige via Datenbank IEEE Xplore
Open Access?:Nein