Continuous rotation north-finding algorithm based on constrained adaptive Kalman filter

As an orientation measurement system,north-finder has been playing a significant role in both military and civilian fields of orientation and control.In this paper,to deal with drawbacks in the conventional north-finding systems,a dynamic strategy based on continuous rotation modulation to measure the rotational angular velocity of the earth is proposed.By modeling the dynamic error,optimizing the process constraint and estimating dynamic noise,a method combining delay compensation and hardware adjustment,and a constrained adaptive Kalman filter(CAKF)algorithm are designed for the north-finding strategy.According to simulation and experiments,the proposed algorithm can achieve the high-precision north-finding with robust and anti-noise performance.

肖特基金属条对磁纳米结构中Goos-Hanchen移动的影响

采用转移矩阵方法,研究了肖特基金属(Schottky metal,SM)条对双铁磁(ferromagnetic,FM)金属条共同调制的纳米结构中Goos-H?nchen(GH)移动的影响。数值模拟结果表明,肖特基金属条上应用的偏压可以调控GH移动,且GH移动依赖于铁磁金属条与肖特基金属条间的距离、肖特基金属条的宽度以及铁磁金属条产生的磁场。因此,本文研究结果有助于基于铁磁金属条和肖特基金属条的自旋电子学器件的设计。