Aiming at that the successive test data set of the strapdown inertial measurement unit is always small,a Bayesian method is used to study its statistical characteristics.Its prior and posterior distributions are set u...Aiming at that the successive test data set of the strapdown inertial measurement unit is always small,a Bayesian method is used to study its statistical characteristics.Its prior and posterior distributions are set up by the method and the pretest,sample and population information.Some statistical inferences can be made based on the posterior distribution.It can reduce the statistical analysis error in the case of small sample set.展开更多
针对商用低精度惯性测量单元具有高成本、制造工艺复杂、废弃后污染环境、不能生物降解等缺点,提出一种低成本、可生物降解的木制惯性测量单元。该设计包含平衡振子和非平衡振子单元,分别用于测量3轴加速度和3轴角加速度。采用激光诱导...针对商用低精度惯性测量单元具有高成本、制造工艺复杂、废弃后污染环境、不能生物降解等缺点,提出一种低成本、可生物降解的木制惯性测量单元。该设计包含平衡振子和非平衡振子单元,分别用于测量3轴加速度和3轴角加速度。采用激光诱导石墨烯的工艺在木梁上制备应变传感器阵列,并形成多组惠斯顿电桥测量电路。结果表明:加速度方面,X轴灵敏度为0.006 m V/g,Y轴灵敏度为8.695×10^(-4)m V/g,Z轴灵敏度为0.200 m V/g;角加速度方面,X轴灵敏度为0.285 m V/(rad/s^(2)),绕Y轴旋转的灵敏度为0.305 m V/(rad/s^(2)),绕Z轴旋转的灵敏度为0.765 m V/(rad/s^(2))。与有限单元法仿真结果对比,实验测量误差在10%以内,且具有良好的重复测量精度。该惯性测量单元在木制船舶、木制载具、木制家具等方面具有潜在的应用前景。展开更多
文摘Aiming at that the successive test data set of the strapdown inertial measurement unit is always small,a Bayesian method is used to study its statistical characteristics.Its prior and posterior distributions are set up by the method and the pretest,sample and population information.Some statistical inferences can be made based on the posterior distribution.It can reduce the statistical analysis error in the case of small sample set.
文摘针对商用低精度惯性测量单元具有高成本、制造工艺复杂、废弃后污染环境、不能生物降解等缺点,提出一种低成本、可生物降解的木制惯性测量单元。该设计包含平衡振子和非平衡振子单元,分别用于测量3轴加速度和3轴角加速度。采用激光诱导石墨烯的工艺在木梁上制备应变传感器阵列,并形成多组惠斯顿电桥测量电路。结果表明:加速度方面,X轴灵敏度为0.006 m V/g,Y轴灵敏度为8.695×10^(-4)m V/g,Z轴灵敏度为0.200 m V/g;角加速度方面,X轴灵敏度为0.285 m V/(rad/s^(2)),绕Y轴旋转的灵敏度为0.305 m V/(rad/s^(2)),绕Z轴旋转的灵敏度为0.765 m V/(rad/s^(2))。与有限单元法仿真结果对比,实验测量误差在10%以内,且具有良好的重复测量精度。该惯性测量单元在木制船舶、木制载具、木制家具等方面具有潜在的应用前景。
