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针对传统六位置标定存在标定步骤复杂、标定时间长等问题,同时随着MEMS器件冗余数目增加和冗余配置结构复杂化,利用分立标定技术实现器件误差参数辨识的难度进一步增大,且不同配置结构所采用的标定方法存在通用性较差的问题。因此提出了一种基于Kalman滤波的冗余MEMS-IMU分立标定方案。该方案首先采用小角度建模法实现安装误差的精确建模;然后针对直接以转台三轴角速率为观测值,导致部分状态量不可观的问题,提出了以器件的输出误差值作为观测量、以器件误差参数作为状态量设计Kalman滤波器;最后设计了高精度三轴转台转位编排方式,并利用四陀螺冗余结构进行标定仿真试验。仿真结果表明:该标定方法与六位置标定方案相比,标定精度平均提高了11.37%,可实现MEMS器件误差参数的快速辨识,对实际工程实践具有一定参考价值。 相似文献
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针对飞行器升降舵、副翼角运动的测试需求,提出了单轴捷联姿态系统的原理及算法,介绍了基于MEMS陀螺仪和加速度计的舵面运动测量仪的构成,并对测量仪的工作过程进行了仿真.仿真表明,测量仪的性能满足舵面运动测量的需要. 相似文献
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介绍了微纳米技术的基本含义和国内外主要进展,讨论了该技术在航天技术领域的应用情况和发展趋势,提出了我国发展该项技术重视的主要问题。 相似文献
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Xu Jianmao Zhang Haipeng Sun Junzhong 《中国航空学报》2007,20(6):539-545
In order to improve the navigation accuracy of an inertial navigation system (INS), composed of quartz gyroscopes, the existing real-time compensation methods for periodic errors in quartz gyroscope drift and the periodic error term relationship between sampled original data and smoothed data are reviewed. On the base of the results, a new compensation method called using former period characteristics to compensate latter smoothness data (UFCL for short) method is proposed considering the INS working characteristics. This new method uses the original data without smoothing to work out an error conversion formula at the INS initial alignment time and then compensate the smoothed data errors by way of the formula at the navigation time. Both theoretical analysis and experimental results demonstrate that this method is able to cut down on computational time and raise the accuracy which makes it a better real-time compensation approach for periodic error terms of quartz micro electronic mechanical system (MEMS) gyroscope's zero drift. 相似文献
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支持MEMS的CAD/CAE系统结构研究 总被引:5,自引:0,他引:5
康建初 《北京航空航天大学学报》1998,24(4):475-478
CAD/CAE技术在MEMS(Micro Electro Mechanical Systems)研究过程中具有非常重要的作用.本文首先介绍了用于MEMS的CAD/CAE技术特点,然后研究了MEMS CAD/CAE系统结构,给出了软件支持工具结构框图,指明了解决其中关键技术的途径.CAD/CAE技术的应用,将提高微型机电系统的设计质量,缩短研制周期,使之及早走向工业化. 相似文献
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Various plants have the ability to follow the sun with their flowers or leaves during the course of a day via a mechanism known as heliotropism. This mechanism is characterised by the introduction of pressure gradients between neighbouring motor cells in the plant?s stem, enabling the stem to bend. By adapting this bio-inspired mechanism to mechanical systems, a new class of smart structures can be created. The developed overall structure is made up of a number of cellular colonies, each consisting of a central pressure source surrounded by multiple cells. After launch, the cellular arrays are deployed in space and are either preassembled or alternatively are attached together during their release or afterwards. A central pressure source is provided by a high-pressure storage unit with an integrated valve, which provides ingress gas flow to the system; the gas is then routed through the system via a sequence of valve operations and cellular actuations, allowing for any desired shape to be achieved within the constraints of the deployed array geometry. This smart structure consists of a three dimensional adaptable cellular array with fluid controlling Micro Electromechanical Systems (MEMS) components enabling the structure to change its global shape. The proposed MEMS components include microvalves, pressure sensors, mechanical interconnect structures, and electrical routing. This paper will also give an overview of the system architecture and shows the feasibility and shape changing capabilities of the proposed design with multibody dynamic simulations. Example applications of this lightweight shape changing structure include concentrators, mirrors, and communications antennas that are able to dynamically change their focal point, as well as substructures for solar sails that are capable of steering through solar winds by altering the sails? subjected area. 相似文献