"Ronkanen, P." - Selaus tekijän mukaan TUNICRIS-julkaisut

Viitteet 1-4 / 4

    • Current control of piezoelectric actuators with power loss compensation 

      Ronkanen, P.; Kallio, P.; Koivo, H. (2002)
      conferenceObject
      This paper introduces a feedforward charge control method, which controls the displacement by the amount of current fed to the actuator. The method includes estimation and compensation of the power losses occurring in the ...

    • Microcutting of living tissue slices and stem cell colonies by using mechanical tool 

      Hirvonen, J.; Ronkanen, P.; Ylikomi, T.; Bläuer, M.; Suuronen, R.; Skottman, H.; Kallio, P. (2008)
      conferenceObject
      There is a growing need for methods to cut living tissues in vitro and cell cultures in microscale in biological and medical research. This paper presents two different microrobotic methods for cutting: mechanical ...

    • Self heating of piezoelectric actuators. measurement and compensation 

      Ronkanen, P.; Kallio, P.; Vilkko, M.; Koivo, H.N. (2004)
      conferenceObject
      This paper introduces the effect of self heating on the displacement of piezoelectric actuators and a novel method to quantify self heating. Issues influencing self heating include; the frequency and the amplitude of the ...

    • Simultaneous actuation and force estimation using piezoelectric actuators 

      Ronkanen, P.; Kallio, P.; Koivo, H.N. (2007)
      conferenceObject
      This paper introduces a force estimation method that enables simultaneous actuation and force estimation using piezoelectric actuators. The method combines an actuator input voltage and a current together with a displacement ...