共查询到19条相似文献,搜索用时 156 毫秒
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飞行仿真转台耦合力矩分析及其补偿控制 总被引:1,自引:0,他引:1
对于高精度的飞行仿真转台,影响其精度的因素很多,如三轴同时转动时的惯量耦合及负载重心与回转中心不重合等原因而造成的不平衡力矩,本文针对这两个问题进行了分析,建立了转动惯量与转角、负载偏载力矩与转角的函数关系,通过仿真计算说明,外框的转动惯量,内框的偏载力矩受耦合影响最大。在此基础上,给出了控制系统的补偿方法,为转台控制系统的设计提供了参考依据。 相似文献
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在红外成象自寻的导弹半实物仿真系统精度分配中 ,各仿真设备对整个系统的仿真精度灵敏度难以计算。本文建立红外成象自寻的导弹半实物仿真系统数学模型 ,利用数学仿真实验和统计拟合成功地解决了这一难题 ;根据动力学基本定理、图象处理算法和国家仿真设备的规范标准建立了导弹、弹体三轴转台、目标二轴模拟转台、过载模拟器和红外成象系统的数学模型。所建模型 ,不进行刚体运动模型的线性化 ,充分考虑了转台各轴之间的耦合作用和红外成象技术的影响 ,更精确、更全面地反映了仿真系统的实际运行特性 ,并具有较强的通用性 相似文献
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三轴仿真转台的总体设计与关键技术研究 总被引:5,自引:2,他引:3
本文针对某型三轴仿真转台任务,设计并实现了三轴仿真转台系统的硬件和软件。并且对三轴仿真转台中的难点问题进行了研究,提出了解决方案,通过实际调试证明了该设计和关键技术解决方案是正确的,该系统达到了设计指标要求,圆满完成了配合仿真实验的任务 相似文献
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This paper is concerned with the H∞ fault detection for continuous-time linear switched systems with its application to turntable systems.The solvability condition for a desired filter is established based on the proposed sufficient condition.Based on the double channel scheme of the turntable control system,the turntable system can be modeled as a switched system.Finally,by taking the turntable system as a numerical example,the effectiveness of the proposed theory is well validated. 相似文献
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基于对角回归神经网络的转台伺服系统逆控制 总被引:1,自引:0,他引:1
针对转台伺服系统中存在的不确定性和非线性因素,提出一种基于对角回归神经网络(diagonal re-current neural network,DRNN)的逆控制方法。逆控制器由对角回归辨识网络(DRNNI)和对角回归控制网络(DRNNC)组成,利用神经网络的逼近能力,在线辨识系统的逆模型,直接将辨识器的拷贝作为系统的控制器。该方法结合了神经网络和逆系统控制的优点,能够克服系统中的不确定性和非线性因素。仿真结果表明,有效提高了转台伺服系统的动态跟踪精度,并具有较好的鲁棒性能。控制器的运算量小,能够满足实时控制要求。 相似文献
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A finite-time tracking control scheme is proposed in this paper based on the terminal slid- ing mode principle for motor servo systems with unknown nonlinear dead-zone inputs. By using the differential mean value theorem, the dead-zone is represented as a time-varying system and thus the inverse compensation approach is avoided. Then, an indirect terminal sliding mode control (ITSMC) is developed to guarantee the finite-time convergence of the tracking error and to overcome the singu- larity problem in the traditional terminal sliding mode control. In the proposed controller design, the unknown nonlinearity of the system is approximated by a simple sigmoid neural network, and the ap- proximation error is diminished by employing a robust term. Comparative experiments on a turntable servo system are conducted to show the superior performance of the proposed method. 相似文献
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二级倒立摆在Simulink环境下的实时控制 总被引:4,自引:0,他引:4
利用Matlab环境下Simulink工具箱中现有的模块及其函数,开发出能够与被控硬件系统直接通讯的软件模块以及对被控系统进行实时操作和控制的命令模块,实现了直接在Simulink环境下对二级倒立摆系统的实时控制,扩充了已有的Simulink工具箱的功能。研究中所采用的技术与方法可以扩展到对其他硬件系统的实时控制中。 相似文献
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Variable feedrate interpolation algorithms for five-axis parametric toolpath are very promis- ing but still rather limited currently. In this paper, an off-line feedrate scheduling method of dual NURBS curve is presented with geometric and kinematical constraints. For a given dual parametric curve, the feedrates of sampling points are first scheduled sequent with confined feedrate of cutter tip and machine pivot, chord error, normal acceleration and angular feedrate. Then, the feedrate profiles of angular feed acceleration sensitive regions of the path are adjusted using a bi-directional scanning algorithm. After that, a linear programming method is used to adjust the feedrate profiles of linear feed acceleration sensitive regions and control the linear feed acceleration of both cutter tip and machine pivot within preset values. Further, a NURBS curve is used to fit the feedrates of sampling points. Finally, illustrative examples are carried out to validate the feasibility of the proposed feedrate schedul- ing method. The results show that the proposed method has the ability of effectively controlling the angular feed characters of cutter axis as well as the chord error and linear feed characters of cutter tip and machine pivot, and it has potential to be used in high accuracy and high quality five-axis machining. 相似文献
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龚汉兵 《系统工程与电子技术》1992,(9)
本文提出了导弹速率捷联姿态控制系统三通道仿真试验中不需要三轴模拟飞行转台参与的试验方法,论述了试验原理、试验编排程序和试验步骤。举出了某战术地地导弹速率捷联姿态控制系统仿真试验实例及其飞行试验结果来说明试验原理的正确性、方法的可行性和适用性。研究表明:导弹速率捷联姿态控制系统三通道仿真试验,按本文提出的方法实施,可以简化试验程序,节省试验周期和经费,提高试验效率,获得满意的试验结果。 相似文献