2010•TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series COpen access

Shaking-Table Control Taking Account of Reaction Force : Controller Disign of Observer-Based Force Compensation(Mechanical Systems)

Koji Hironaka, Jun Miura, Yuji ASANO, Kazuki YASUDA, Masayuki KOUDA, Akihiro TOYOOKA

Abstract

When a shaking-table of an earthquake simulator is driven for the seismic experiment of a specimen, its motion is affected by a reaction force caused by the specimen on the table. This paper presents a reaction force compensation methodology for shaking tables in earthquake simulators. This methodology is designed by using the RFC(Reaction Force Compensation) based on the disturbance observer method in real time. RFC observes the reaction force and compensates the observed reaction force by using a phase lead compensator. The effectiveness of the proposed technique is verified by using a two-dimensional large shaking table.

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Key concepts: Earthquake shaking table, Reaction, Compensation (psychology), Table (database), Observer (physics), Control theory (sociology), Ground reaction force, Computer science