Torque unit manipulator driven by control moment gyros

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper deals with a space manipulator which is called Torque-Unit-Manipulator (TUM): TUM separates its actuator called torque unit from its joint: i.e., torque unit is placed on an arbitrary place on a link, and each rotational joint is a free joint. The TUM proposed in the previous work, however, is driven by reaction wheels, and thus it has a problem to be solved: the angular velocity of the reaction wheel may saturate when repeated external force disturbs the posture of the TUM. The reason is that the reaction wheels accumulate angular momentum during the maneuver because of non-holonomic constraint for the free joints. Therefore, TUM driven by Control Moment Gyros (CMGs) is proposed in this paper. For the proposed TUM, an asymptotically stable controller can be designed through Lyapunov's approach, and besides this the gimbal angular velocity of the CMG returns to zero after each maneuver. The dynamics of the proposed TUM is computed in numerical simulation, and the effectiveness of the designed controller is shown.

Original languageEnglish
Pages (from-to)865-876
Number of pages12
JournalAdvances in the Astronautical Sciences
Publication statusPublished - 1997

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science


Dive into the research topics of 'Torque unit manipulator driven by control moment gyros'. Together they form a unique fingerprint.

Cite this