Notice of RetractionSix degree-of-freedom strong ground motions measurement by using eight accelerometers

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

A new integrated measuring system with eight force-balance accelerometers was proposed to obtain a direct measurement of six degree-of-freedom (DOF) strong ground motions, including three rotational and three actual translational acceleration components without gyroscopes. In the proposed measuring system, the relationship between the outputs from eight accelerometers and the six DOF motions of the measuring system under an earthquake were described by differential equations. These equations were derived from the positions and directions of eight accelerometers in the measuring system. The third Runge-Kutta algorithm was used to guarantee the accuracy of numerical calculation. All the algorithms used to compute the six DOF components of strong ground motions had been implemented real time in Digital Signal Processor (DSP). The ways to compensate and eliminate the distortion of measured results caused by position and direction errors were also proposed respectively.