Combined global/local control concept for truss structures

M. Ebihara, T. Igusa

Research output: Contribution to journalConference articlepeer-review


Various options have been investigated for vibration control of space structures (Balas, 1982). The simplest, most robust control concept is collocated-direct feedback (C-DFB) (Balas, 1979). Here, the controllers and sensors are at the same locations, and each controller behaves as a combination of an active damper and an active stiffener. A slightly more general concept is non-collocated-direct feedback (N-DFB). Here, additional remote sensors are used to sense motion in different parts of the structure. Although N-DFB is more complex than C-DFB, it is still too simple to handle a variety of loads. Furthermore, N-DFB has robustness problems (Joshi, 1986). This abstract shows how N-DFB can be modified into a more advanced and powerful global/local control concept (GLC). The local controller is very similar to C-DFB. However, the global controller has some intelligence, and interacts with the local controller. This concept has similarities to Object-Oriented approaches to problem solving (Nakai, et al., 1991).

Original languageEnglish (US)
Pages (from-to)3328-3331
Number of pages4
JournalCollection of Technical Papers - AIAA/ASME Structures, Structural Dynamics and Materials Conference
Issue numberpt 6
StatePublished - Jan 1 1993
Externally publishedYes
Event34th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference - La Jolla, CA, USA
Duration: Apr 19 1993Apr 22 1993

ASJC Scopus subject areas

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering


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