The microminiature inertial measurement system, a new style of inertial measurement system, has many advantages compared with traditional systems, such as small size, low mass, low cost, low power consumption, high ...The microminiature inertial measurement system, a new style of inertial measurement system, has many advantages compared with traditional systems, such as small size, low mass, low cost, low power consumption, high bearing capacity, and long life. Undoubtedly, it will have wide applications in military and commercial fields. However, current micro inertial sensors do not have sufficient accuracy, so, its applications are limited to some extent. This paper describes a microminiature inertial measurement system and its design, operating theory and error control techniques. In addition, its performance and applications are evaluated.展开更多
为有效控制输电塔的有害振动需要了解其振动特性,提出一种惯性测量数据矩阵模式的输电塔振动分析方法。将微惯性测量单元(Micro-Inertia-Measurement-Unit,MIMU)安装在输电塔上通过Kalman滤波预处理三轴原始数据,重构权重奇异值分解(Wei...为有效控制输电塔的有害振动需要了解其振动特性,提出一种惯性测量数据矩阵模式的输电塔振动分析方法。将微惯性测量单元(Micro-Inertia-Measurement-Unit,MIMU)安装在输电塔上通过Kalman滤波预处理三轴原始数据,重构权重奇异值分解(Weighted Singular Value Decomposition,WSVD)后的相干振动分量建立平动/扭动矩阵。提取矩阵序列中的变换矩阵,计算其Frobenius范数度量暂态振动间的变异度来估计幅值与频率。根据幅频参数计算振动耗能,观测输电塔各轴向以及整体的振动情况。最后设计振动台、转台实验验证振动数据处理方法的有效性,并对不同风荷载下的塔线模型与真型风振试验进行特性分析。结果表明输电塔振动以水平方向的平动形式为主,随风向夹角的增大其非线性效应逐渐增强,所提出的数据处理方法能够有效获得振动信息,可为控制有害振动的阻尼器的设计提供参考。展开更多
基金the Major Research Project of the Ninth-Five Plan (1996 2 0 0 0 ) of China (No.8.7.1.9)
文摘The microminiature inertial measurement system, a new style of inertial measurement system, has many advantages compared with traditional systems, such as small size, low mass, low cost, low power consumption, high bearing capacity, and long life. Undoubtedly, it will have wide applications in military and commercial fields. However, current micro inertial sensors do not have sufficient accuracy, so, its applications are limited to some extent. This paper describes a microminiature inertial measurement system and its design, operating theory and error control techniques. In addition, its performance and applications are evaluated.
文摘为有效控制输电塔的有害振动需要了解其振动特性,提出一种惯性测量数据矩阵模式的输电塔振动分析方法。将微惯性测量单元(Micro-Inertia-Measurement-Unit,MIMU)安装在输电塔上通过Kalman滤波预处理三轴原始数据,重构权重奇异值分解(Weighted Singular Value Decomposition,WSVD)后的相干振动分量建立平动/扭动矩阵。提取矩阵序列中的变换矩阵,计算其Frobenius范数度量暂态振动间的变异度来估计幅值与频率。根据幅频参数计算振动耗能,观测输电塔各轴向以及整体的振动情况。最后设计振动台、转台实验验证振动数据处理方法的有效性,并对不同风荷载下的塔线模型与真型风振试验进行特性分析。结果表明输电塔振动以水平方向的平动形式为主,随风向夹角的增大其非线性效应逐渐增强,所提出的数据处理方法能够有效获得振动信息,可为控制有害振动的阻尼器的设计提供参考。
