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为了实现四旋翼飞行器的高精度导航,提出了互补滤波法和四元数算法对传感器获得的数据进行修正,最大限度的抑制干扰误差并提高姿态角解算的准确度。首先简单推导了捷联式惯性导航系统的算法基本原理并利用互补滤波算法进行改进,然后给出了惯性导航系统的力学编排模型分析旋翼飞行器的运动姿态。最后仿真验证数据选用惯性仪表MPU6050和HMC5883所得到实测数据采集并进行仿真分析,平台处理器选用STM32来仿真惯性仪表的测量速度,最终得到实验结果证明算法可行性。 相似文献
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光存储中的光学系统是一种非同轴光学系统,其中各个光学元件的设计位置与装配精度是保证系统光线正常传输并获得准确信号的前提。四元数方法是一种可以方便地描述空间光线的传输计算与坐标变换的数学方法。通过将四元数引入到光学头光学系统的建模中,使用四元数法表征非同轴光学系统的传输方式,并给出建立光学元件的设计、安装参数与聚焦光斑、读出光斑之间关系的流程图。据此模型对各个独立的研究对象进行分析的结果,对光存储中光学系统的设计与生产装配工艺的制定有指导意义;同时,以此模型分析物镜的连续运动对光斑和读出信号的影响,对光学头中的可执行机构力矩器的设计有实践作用。 相似文献
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四旋翼飞行器飞行过程中具有非线性和强耦合性,导致难以建立精确的物理力学模型,针对这个难题,提出了基于多个ARX模型四旋翼飞行器的LQR控制器设计方法。ARX模型全称是带外生变量的自回归模型,LQR控制器一种基于局部线性化模型的无限时域预测控制器。该法首先基于四旋翼飞行器的动力学特性构建四旋翼飞行器多个ARX的模型结构,并利用结构化非线性参数优化方法辨识模型参数,获取满足工程精度需求的四旋翼非线性动态模型。然后,基于该模型给出了具有状态反馈的LQR控制器设计方法,并通过求解工作点的Riccati方程,获得状态反馈 相似文献
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针对四旋翼飞行器的姿态控制中的受扰动问题,提出了使用模型参考自适应算法加强四旋翼飞行器的姿态稳定性;常规控制器对四旋翼飞行器受扰时的控制很不理想,模型参考自适应控制器在外部干扰或环境影响出现时,能够结合参考模型,提高控制系统的动态品质;结合动力学模型并加以适当简化,设计了常规反馈控制器和模型参考自适应控制器,并进行了数据仿真实验;结果表明,模型参考自适应控制器能够在很大的范围内有效屏蔽干扰,缩短稳定控制时间,验证该算法在四旋翼飞行器姿态控制中是可行有效的。 相似文献
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三维转动的四元数表述 总被引:18,自引:0,他引:18
用四元数表达三维的旋转与使用矩阵相比具有两个优点:第一.几何意义明确;第二,计算简单.因此,四元数在数学、物理学和计算机图形学中具有很高的应用价值.本文详细叙述了四元数的这一功能,讨论了四元数的定义、运算、性质、几何意义和它的3种表达形式,给出了使用四元数处理点的各种几何变换的一般结论. 相似文献
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A General Response System Control Method Based on Backstepping Design for Synchronization of Continuous Scalar Chaotic Signal 下载免费PDF全文
A general response system control method for synchronization of continuous scalar chaotic signal is presented. The proposed canonical genera/response system can cover most of the well-known chaotic systems. Conversely, each of these chaotic systems can Mso be used to construct the genera/response system. Furthermore, a novel controller of the proposed response system is designed based on backstepping technique, with which the output of the genera/response system and the given continuous chaotic signal can synchronize perfectly. Two numerical examples are given to illustrate the effectiveness of the proposed control method. 相似文献
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A backstepping control system is proposed to control and synchronize the attitude dynamics of a satellite subjected to deterministic external perturbations which induce chaotic motion when no control is affected in this paper. The proposed method is a systematic recursive design approach based on the choice of Lyapunov functions for constructing feedback control laws. The effectiveness of the proposed control scheme is verified by the simulated results. 相似文献
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多智能体系统队形控制的研究主要集中于队形形成、队形保持和队形变换三个方面。首先,介绍、分析了多种队形控制方法,包括轨迹跟踪法、行动选择法、假想刚体法、网络关系图分析法、动态编队法、虚拟势场法、学习控制法和混合控制法等;其次,对移动机器人、无人机、水下机器人等多智能体系统的队形控制应用进行研究;然后,给出了近年来多智能体系统队形控制的研究进展,包括基于复Laplacian矩阵的多维空间队形控制方法,其它领域技术(云计算、图像处理等)用于队形控制的研究成果,并对基于队形控制的多移动机器人和无人机搬运作了介绍;最后,给出了当前队形控制研究中尚未解决的问题,包括队形扩展,队形稳定性,通信、传感器功能,异构多智能体系统队形控制和机械臂编队等。 相似文献
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There exists rare integration formulas over quaternions due to the
noncommutativity of quarternions multplication. Based on the class
operator's formula of rotation group we derive a Gaussian integral formula
for quaternions, which is similar in form to the integration for coherent
state's completeness relation. 相似文献
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Landl N. V. Korolev Yu. D. Geyman V. G. Frants O. B. Argunov G. A. Bolotov A. V. Akimov A. V. Bak P. A. 《Russian Physics Journal》2019,62(7):1279-1288
Russian Physics Journal - Results of investigation of the glow discharge with hollow cathode and ring anode in the trigger unit of a coldcathode thyratron TPI1-10k/50 are presented. A specific... 相似文献
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JIN Yi-Liang LI Kin CHEN Yong 《理论物理通讯》2008,50(7):111-116
In this paper, a function projective synchronization scheme is developed to investigate the function projective synchronization between the discrete-time driven chaotic system and the discrete-time response chaotic system. With the aid of symbolic-numeric computation, we use the scheme to study the function projective synchronization between 2D Lorenz discrete-time system and Hdnon discrete-time system, as well as that between 3D discrete-time hyperchaotic system and Henon-like map via three scalar controllers, respectively. Moreover numerical simulations are used to verify the effectiveness of the proposed scheme. 相似文献
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M.-L. Almazor O. Dulieu F. Masnou-Seeuws R. Beuc G. Pichler 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2001,15(3):355-363
We propose a new possibility to form ultracold molecules, via photoassociation of a pair of cold atoms into vibrational levels of the external well of an excited electronic state located
at intermediate interatomic distance ( ≈ 20 Bohr radii), and embedded in the dissociation continuum above its dissociation
limit. The existence of such a well is demonstrated by conventional free-free absorption spectroscopy at thermal energies.
Estimation for cold atom photoassociation and cold molecule formation rates are obtained within a perturbative approach [Drag
et al., IEEE J. Quant. Electr. 36, 1378 (2000)], and are found observable for usual conditions of photoassociation experiments.
Received 1st March 2001 相似文献