共查询到20条相似文献,搜索用时 93 毫秒
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为了保证惯性测量组合的工作精度和长期工作稳定性,利用有限元分析软件,通过线性简化橡胶隔振环节,建立了惯性测量组合的有限元模型,对惯性测量组合结构进行了模态分析,根据实际工作振动频谱进行了随机振动仿真分析,得到了惯性测量组合的实际工作状态下振动响应应力谱和最大等效应力值。仿真分析结果验证了惯性测量组合结构设计及减振效果的合理性,为电路板及电子元器件进行应力损伤分析和故障预计提供了可信的环境应力状态,验证了本结构设计可以保证惯性测量组合的长期工作稳定性。同时为后续开展同类产品的结构振动仿真分析提供了理论依据和实现方法。 相似文献
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航空装备维修对产品维修技术开发和维修操作技能要求高,人员能力培养成本高、周期长、难度大.本文基于PostEngineer开发某惯性平台维修培训仿真系统,经实际应用与统计分析,该平台覆盖产品组件的原理学习和实操训练,与传统教学手段相比,学员对产品维修知识点掌握全面,培训周期短,为用户提供了直观、逼真的维修训练环境. 相似文献
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整体式惯性粒子分离器雷达散射特性数值仿真 总被引:1,自引:0,他引:1
为了探究整体式惯性粒子分离器(IPS)的雷达散射特性,利用物理光学迭代法(IPO),编制了整体式粒子分离器的RCS计算程序,发展了一种改进的高效遮挡关系判断算法,并对程序的计算精度进行了校验。对不同雷达波长下,不同构型整体式粒子分离器的前向雷达散射特性进行了计算和分析比较。结果表明,随着雷达波长的增大,IPS的雷达散射面积减小;IPS分流器径向位置对重点方位角度范围内的雷达散射面积(RCS)有一定影响,并为改善IPS的雷达散射特性提供了参考依据。 相似文献
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为了可视化仿真惯性平台初始对准过程和运动规律,利用实时建模工具MultiGen Creator(Creator)建立了惯性平台的模型,并采用渲染引擎OpenSceneGraph(OSG)进行驱动渲染,实现了一个惯性平台运动仿真系统。根据惯性平台运动方程输入激励,运行结果表明,所建立的仿真系统能够完整演示惯性平台初始对准过程和运动规律,三维显示效果逼真度高,且能实时响应用户操作。 相似文献
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军事仿真:概念、现状与发展 总被引:4,自引:0,他引:4
简要介绍了军事仿真的概念和分类,并分别对武器装备平台仿真、作战指挥仿真、战略决策仿真等不同层次仿真系统的特点、组成、现状及发展作了综述和讨论。 相似文献
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网络仿真与应用软件的特性分析 总被引:1,自引:0,他引:1
本文主要阐述了网络仿真技术的思想及特点,结合不同应用环境,对当前几种仿真软件OPNET、NS2等进行性能对比与分析,从不同的层次总结它们的特点,以此对研究者起到一定的导向作用。 相似文献
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数控仿真是一个耗时的过程,因此有必要对其进行控制。本文给出了采用线程技术来实现仿真控制的方法,包括改变仿真过程的状态,高运行速度和视角范围等等,该方法稳定可靠且易于实现。本文最后分析了在数控仿真控制中,这种技术受到的限制。 相似文献
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基于MATLAB的模糊自整定PID参数控制器计算机仿真 总被引:7,自引:0,他引:7
黄晓宇 《自动化与仪器仪表》2001,(3):21-24
介绍了怎样有机地将MATLAB5.X提供的SIMULINK2与FUZZYTOOLBOX有机地结合,方便有效地实现模糊自整定PID参数控制系统的设计和计算机仿真。这对于模糊自整定PID参数控制系统的设计优化和开拓MATLAB5.X在工程模糊控制领域的应用是十分有意义的。 相似文献
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提出了一种采用计算机仿真进行直流调速系统的优化与仿真的方法:首先,根据直流调速数字控制系统的性能特点,建立了系统仿真模型,然后分析了该系统的缺点所在并进行优化,从而构成一种复合控制系统,以实现对驱动电流的控制作用,最后对优化前后的输出数据进行分析对比,结果表明,采用优化后的控制系统可使输出数据更加精确可靠。 相似文献
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This study investigates the problem of inertial navigation system's (INS's) vertical channel instability, which primarily results from the positive gravity feedback that takes place in the numerical integration step of the accelerometer measurements. Traditional solutions to the problem include using information from auxiliary sensors, typically barometers and global navigation satellite systems (GNSSs), integrated into INSs through feedback control loops (referred to as mechanizations) and/or Kalman filters (KFs). Most studies on this subject lack clarity regarding the methodology used for the mechanization tuning (by showing excessive empiricism) and/or disregard the benefits of using optimal control techniques for the purpose of the latter. This study, therefore, reviews the main mechanization used for vertical channel stabilization of baro-inertial integrations and presents, as its main contribution, the performance analysis of new tuning techniques based on optimal control theory, namely, by linear quadratic regulator (LQR) and by minimization of performance indices such as the integral absolute error (IAE), integral squared error (ISE), integral of time multiplied absolute error (ITAE), and integral of time multiplied squared error (ITSE). To validate the proposed tunings, the integrated altitude and vertical velocity mean errors (MEs) and standard deviations (SDs) are used as metrics, which are compared with the corresponding MEs/SDs of the empirical tuning with highest performance/acceptance in the literature. We also evaluate the ability of the mechanizations to fulfill their ultimate goal, namely, to track the reference barometer input, by also attenuating its noise. Based on simulated and experimental results, the present study demonstrates and validates the effectiveness/robustness of the proposed optimal tunings, particularly those based on LQR and ITAE minimization. 相似文献
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Having as symmetric a radiation drive as possible is very important for uniformly imploding the centrally located capsule in laser-driven Inertial Confinement Fusion (ICF). Usually, intensive computation is required to analyze and optimize the radiation symmetry in ICF. In this paper, a novel compressive analysis approach is presented to efficiently evaluate and optimize the radiation symmetry. The core idea includes (1) the radiation flux on the capsule for symmetry evaluation is transformed into frequency domain and weighted to obtain a sparse and orthogonal representation, (2) the sparse coefficients reflecting the radiation flux distribution are accurately and efficiently recovered from far less samples on the frequency domain, i.e. [0,2π)×[0,π] through ? 1-norm optimization, which greatly improves the efficiency of radiation symmetry evaluation and optimization for the design of physics experiments in the laser-driven ICF, and (3) the sparsity level to recover the sparse coefficients is adaptively determined with a one-dimensional optimization procedure for accurate and efficient compressive analysis. Finally, two examples on current laser facilities are utilized to demonstrate the evaluation accuracy, robustness and computation efficiency of compressive analysis approach. 相似文献
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The control of human heart rate during exercise is an important problem that has implications for the development of protocols for athletics, assessing physical fitness, weight management, and the prevention of heart failure. Here we provide a new stabilization technique for a recently-proposed nonlinear model for human heart rate response that describes the central and peripheral local responses during and after treadmill exercise. The control input is the treadmill speed, and the control objective is to make the heart rate track a prescribed reference trajectory. We use a strict Lyapunov function analysis to design new state and output feedback tracking controllers that render the error dynamics globally exponentially stable. This allows us to prove input-to-state stability properties for our feedback stabilized systems under actuator errors. This robustness property quantifies the effects of variations of the treadmill speed from the controller values. We illustrate our feedback design through simulations. 相似文献
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基于MATLAB(SIMULINK)的模糊控制系统计算机仿真 总被引:12,自引:1,他引:12
将MATLAB的FUZZY TOOLBOX中的模糊推理系统(Fuzzy Interence System)编辑器与SIMULINK有机结合起来,充分利用它们各自的优势,方便地实现了模糊控制系统(FCS)的计算机仿真。从而克服了对复杂控制律无法直接应用SIMULINK进行仿真的缺点,了SIMULINK的应用范围。 相似文献
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邢炜 《自动化与仪器仪表》2014,(9):99-100
计算机模拟技术于2006年进入我国建筑领域,现在,就绿色建筑的设计和评断而言,计算机模拟技术已成为了必不可少的方面。由于我国研究与设计机构当前依旧处于对绿色建筑计算机模拟解析的摸索运用时期,其模拟方式与方案改进手段截然不同,所以绿色建筑设计效果很难尽如人意。笔者在本文中概括了绿色建筑计算机模拟方式与方案改进手段,给予绿色建筑设计人员方法指点,借此增强绿色建筑的设计效果。 相似文献
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某型发动机的起动过程采用时序控制方式,由起动程序机构来实行控制.由于该起动程序机构为机械模拟电子式结构,缺点较多,而利用先进的数字控制技术可以很好地克服这些缺点.对机械模拟电子式起动程序机构进行了数字化改进,并利用Proteus软件进行了数字式起动程序机构基本功能和性能的仿真实验.仿真结果表明,起动过程的控制精度由原先的3~5 s减小到0.1 s以内.此外系统结构得到大大简化,便于调试、安装和维修. 相似文献