共查询到20条相似文献,搜索用时 62 毫秒
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针对硅微陀螺的零偏受环境温度影响比较敏感的问题,研究了一种新的温度补偿方案。通过研究驱动频率的温度特性,发现驱动频率与温度之间存在很好的线性关系,经过适当的标定,驱动频率可以作为内置温度传感器取代传统的温度传感器,解决了传统传感器温度不准确和测量滞后的问题。建立了驱动频率与零偏的模型,对硅微陀螺的零偏进行了温度补偿验证。验证试验表明,在-40℃~60℃全温区范围内,零偏温度灵敏度由0.053°/(s.℃)提高到0.00244°/(s.℃),有效地改善了全温区的零偏温度系数。 相似文献
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对MEMS加速度计的温度模型与其倾角的相关性进行分析,提出了一种无需精确控制加速度计位置,借助普通恒温箱即可完成的温度模型辨识方法,并根据辨识结果设计温度补偿软件方案.实验结果表明,温度补偿可使加速度计测量输出的稳定性提高一个数量级,补偿效果明显,模型辨识方法有效.将温度模型用于某小型无人机航姿测量系统中,缩短了系统启... 相似文献
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Microsystem Technologies - A kind of resonant silicon micro-electro-mechanical systems (MEMS) gyroscope with self-temperature compensation function is designed to overcome the problem of... 相似文献
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为解决微机电(micro electromechanical system,MEMS)陀螺仪在随机振动力学环境中的动态误差问题,提出一种MEMS陀螺仪动态误差的补偿方法,建立动态误差模型。通过对MEMS陀螺仪动态误差影响因素的分析,在MEMS陀螺仪静态误差模型基础上加入与振动输入相关的误差项,减小由于随机振动引入的误差,提高MEMS陀螺仪在随机振动环境下的测量精度。结合实例,对所提模型进行仿真分析,验证了其可行性和有效性。 相似文献
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Microsystem Technologies - This paper proposed a kind of real-time online solving method based on the analog circuit for the output signal solution of frequency resonant gyroscope. This method... 相似文献
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MEMS陀螺误差辨识与补偿 总被引:1,自引:0,他引:1
《传感器与微系统》2010,29(3)
由于制造工艺等原因,MEMS陀螺的随机漂移非常大,严重影响了系统的性能.通过自制的基于MEMS的捷联惯导系统的相关实验,对MEMS陀螺的确定性误差和随机误差分别进行了辨识和补偿.完成确定性误差补偿,对MEMS陀螺随机误差进行了时间序列分析,并建立了AR模型,根据所选模型参数建立了随机误差的系统方程,采用经典卡尔曼滤波进行随机误差补偿.实验结果说明:无论是静态下还是动态下,补偿后信号的方差都大大下降,说明了滤波效果较为明显,具有一定的工程应用价值. 相似文献
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This paper proposes one study method of resonant MEMS gyroscope based on the circuit in order to solve problems such as long verification cycle and high cost of the MEMS gyroscope structure design. Firstly, on the basis of Euler–Bernoulli beam theory, this study establishes resonant beam vibration equation, obtains semi-Mathieu equation after normalization, namely parameter excitation characteristic equation of the frequency micro gyroscope, then deduces the characteristic equation in consideration of the damping condition, and uses the parameter perturbation method to study the output characteristic of gyroscope under ideal and damping states. Then, the analog circuit is innovatively used to obtain the characteristic equation of gyroscope under ideal and damping states, subsequently, the characteristic equation is normalized. It is realized that the dynamics equation is equivalent to the analog circuit. Finally, the experimental study is carried out, and experimental device for the frequency micro gyroscope harmonic oscillator parameter excitation characteristic is produced. Meanwhile, the analog circuit output waveform and frequency change correctness are verified by using the Runge–Kutta method and the parameter perturbation method, respectively. The experimental results show that the experiment device can be used to study the nonlinear vibration characteristics of the gyroscope. 相似文献
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Microsystem Technologies - In this paper, a novel method is proposed for finding the best excitation signal frequency of the MEMS vibratory gyroscope sensors. In the proposed method, the amplitude... 相似文献
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Microsystem Technologies - In this paper, an analog circuit model for the drive mode of a two-degree-of-freedom MEMS vibratory gyroscope is presented. This model is implemented on a printed circuit... 相似文献
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