Wideband motion control by position and acceleration input based disturbance observer

Kouhei Irie, Seiichiro Katsura, Kiyoshi Ohishi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The disturbance observer can observe and suppress the disturbance torque within its bandwidth. Recent motion systems begin to spread in the society and they are required to have ability to contact with unknown environment. Such a haptic motion requires much wider bandwidth. However, since the conventional disturbance observer attains the acceleration response by the second order derivative of position response, the bandwidth is limited due to the derivative noise. This paper proposes a novel structure of a disturbance observer. The proposed disturbance observer uses an acceleration sensor for enlargement of bandwidth. Generally, the bandwidth of an acceleration sensor is from 1 Hz to more than 1 kHz. To cover DC range, the conventional position sensor based disturbance observer is integrated. Thus, the performance of the proposed Position and Acceleration input based disturbance observer (PADO) is superior to the conventional one. The PADO is applied to position control (infinity stiffness) and force control (zero stiffness). The numerical and experimental results show viability of the proposed method.

Original languageEnglish
Pages (from-to)579-586+5
Journalieej transactions on industry applications
Issue number6
Publication statusPublished - 2007
Externally publishedYes


  • Acceleration control
  • Acceleration sensor
  • Disturbance observer
  • Haptics
  • Motion control
  • Sensitivity function
  • Sensor fusion

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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