Measurement of six degree-of-freedom ground motion by using eight accelerometers

A new integrated measuring system with eight force-balance accelerometers is proposed to obtain a direct measurement of six degree-of freedom (DOF) ground motions, including three rotational and three actual translational acceleration components without gyroscopes. In the proposed measuring system, the relationship between the output from eight force-balance accelerometer and the six DOF motion of the measuring system under an earthquake are described by differential equations. These equations are derived from the positions and directions of the eight force-balance accelerometers in the measuring system. The third-order Runge-Kutta algorithm is used to guarantee the accuracy of the numerical calculation. All the algorithms used to compute the six DOF components of the ground motion are implemented in a real-time in Digital Signal Processor (DSP). The distortion of the measured results caused by position and direction errors of the accelerometers in the measuring system are reduced by multiplying a compensation coefficient C to the output and subtracting static zero drift from the measured results, respectively.

作 者： Yang Zhenyu Shen Yi Liu Zhiyan   作者單位： Department of Control Science and Engineering, Harbin Institute of Technology, Harbin 150001, China  刊 名： 地震工程與工程振動（英文版）  SCI 英文刊名： EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION  年，卷(期)： 2005 4(2)  分類號： P315  關(guān)鍵詞： six degree-of-freedom   ground motion   force-balance accelerometer   translational acceleration   rotational acceleration  

【Measurement of six degree-of-freedom】相關(guān)文章：

Automatic and continuous measurement of aerosol properties in Dunhuang,China04-26

Weight measurement using image-based pose analysis04-26

Research on Instantaneous Thrust Measurement for Attitude-control Solid Rocket Motor04-26

全冊教案pep2 Unit Six At the Zoo04-25

Optimization of measurement distance of 109Cd K XRF system for obese subjects04-27

一年級第二冊英語教案Module Six Unit Two04-25

陽離子 SiX+(X=F,Cl,S,P,Br)分子光譜和分子特性的理論研究04-25