A magnetorheological damper capable of force and displacement sensing

Kwok Ho Lam, Z. H. Chen, Yiqing Ni, H. L.W. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

43 Citations (Scopus)


A magnetorheological (MR) damper with embedded force and displacement sensors is devised to facilitate closed-loop structural vibration control. A piezoelectric force sensor and a linear variable differential transformer (LVDT) have been integrated with a conventional MR damping device. The piezoelectric sensor is used to sense the damping force produced by the damper, while the LVDT is employed to measure the displacement of the vibrating structure at the damper location and the movement of the damper piston. Calibration of the piezoelectric force sensor is conducted through force-controlled tests with sinusoidal force excitations of different amplitudes and frequencies. The sensing and damping performances of the devised MR damper are evaluated under displacement-controlled excitations, with different current inputs being commanded to the damper. The experimental results demonstrate reliable displacement/force sensing and controllable damping capabilities of the devised damper. The sensing-while-damping function of the damper hence offers its potential for real-time feedback structural vibration control.
Original languageEnglish
Pages (from-to)51-59
Number of pages9
JournalSensors and Actuators, A: Physical
Issue number1
Publication statusPublished - 1 Mar 2010


  • Linear variable differential transformer (LVDT)
  • Magnetorhelogical (MR) damper with embedded sensors
  • Piezoelectric force sensor
  • Sensing-while-damping function
  • Structural vibration control

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


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