共查询到17条相似文献,搜索用时 281 毫秒
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本文以TCR型SVC为研究对象,应用先进的非线性控制理论来进行控制器设计,以充分挖掘SVC的工作潜能。详细分析了滑模变结构控制的原理、优缺点,并应用趋近率的设计方法推导出基于指数趋近率的控制率,在与PID控制的跟踪效果对比中,显示出优良的快速性和跟踪精度。另外针对滑模变结构控制所固有的抖振现象,本文提出一种改进的滑模变结构控制系统。最后使用Matlab/simulink环境对所使用的方法进行了仿真验证。 相似文献
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针对起重机轨道检测机器人上的激光姿态角自动调节系统采用经典PID控制效果不佳,无法满足轨道检测要求的问题,提出采用滑膜变结构双闭环的控制方法。文中建立了激光姿态角自动调节系统的数学模型,基于指数趋近律的方法设计了滑膜变结构控制器,并搭建轨道检测机器人及其激光姿态角调节系统。通过仿真研究可知,滑膜变结构控制下激光姿态角调节的时间比PID控制下快0.11 s,超调量减小了0.3%,且运动平稳。仿真试验研究结果为起重机轨道检测机器人的研发与应用提供了依据。 相似文献
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推力矢量控制技术可以有效地解决飞艇低速飞行时舵效不足的问题,但其具有很强的非线性特性,加之飞艇体积庞大,易受风干扰,所以经典的控制器难以满足要求。Backstepping是一种基于递推反演的非线性控制方法,特别适用于强非线性及存在不确定性的系统。针对飞艇的六自由度非线性模型,引入Backstepping方法对带推力矢量飞艇设计了姿态控制器并进行了仿真验证,结果表明所设计的非线性控制器具有良好的动态性,实现了对受扰系统的全局镇定和对给定偏航角的渐进跟踪。 相似文献
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为了提高卫星姿态控制的运行速度,减轻星栽计算机的负担,提出了一种基于FPGA实现卫星姿态控制器的硬件算法.在Matlab/Simulink环境下建立卫星的运动学和动力学方程,给出了经典PID的模拟控制算法.在此基础上推导了数字PID控制算法,并采用状态机的设计方法实现该控制器的设计,应用VHDL硬件语言进行编程.最后,通过调用Matlab的Serial串口对象,将模拟的卫星动力学姿态与FPGA开发板交换控制信息.基于FPGA的PID控制器对整个系统进行控制,最后的仿真结果证明了该方案的可行性和准确性. 相似文献
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Development of Korean High Altitude Platform Systems 总被引:3,自引:0,他引:3
Yung-Gyo Lee Dong-Min Kim Chan-Hong Yeom 《International Journal of Wireless Information Networks》2006,13(1):31-42
A 10-year program to develop a stratospheric airship for telecommunication relays and ground observations at 20 km altitude
has started in December 2000. The program consists of 3 Phases. In 1st Phase, a 50 m unmanned airship will be developed with
basic research for stratospheric airship to secure technologies required for 2nd Phase development. During the 2nd Phase development,
a prototype stratospheric airship will be launched for station keeping at 20 km. The 2nd Phase development plan will take
concrete shape based on the result of the 1st Phase. Then, stratospheric airship will be commercialized through 3rd Phase
development. KARI, Korea Aerospace Research Institute, has been developing a 50 m unmanned airship system as its 1st Phase
Program during last 3 years. KARI finished design of the system, manufacturing of components and sub-systems, tests of components
and sub-systems, and total system check for flight test. KARI’s general plan and approach for developing stratospheric airship
are described in this paper. The characteristics of KARI’s 50 m unmanned airship system are briefly introduced with ground
and flight test results. Also, some activities for the 2nd phase are described. 相似文献
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