Proposal and Preliminary Feasibility Study of a Novel Toroidal Magnetorheological Piston

Gonzalo Aguirre Dominguez, Mitsuhiro Kamezaki, Shigeki Sugano

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


A new magnetorheological piston head design inspired by toroidal electromagnets was proposed in previous work as an alternative to conventional annular dampers. A prototype with a circular valve array integrated inside the piston head was built and tested to measure its passive performance. The mechanical, electromagnetic, and hydraulic models used in the new design were explained, and the relevant parameters of the actuator were analyzed to construct a mathematical model to estimate its performance. These works showed the feasibility of the concept and its potential as an alternative to current damper technology, but lacked a baseline for comparison. This paper reviews and widens this groundwork. It adds a magnetic finite element method study to address the previously found leakage, and a new set of experiments, including a force controller, to compare its performance against a conventional annular piston head. The new findings show how the current force limitations can be overcome by striking a balance between the coil space and the size of electromagnet cores to achieve the performance of current dampers. They also highlight its potential in force control applications to provide a wider range of customization options, such as number and size of holes, electromagnets, and coils, and a better use of the active area of the gap.

Original languageEnglish
Article number7723921
Pages (from-to)657-668
Number of pages12
JournalIEEE/ASME Transactions on Mechatronics
Issue number2
Publication statusPublished - 2017 Apr


  • Hydraulic actuators
  • magnetic field induced strain
  • magnetic liquids
  • magnetorheological fluids
  • prototypes

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering


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