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为了研究采用多目标控制的静止无功发生器对电力系统的调节作用,建立了基于MATLAB的静止无功发生器的仿真模型。以含有静止无功发生器的单机无穷大系统为例,结合多目标控制方法,用S—Function仿真分析了静止无功发生器在系统暂态故障过程中的调节作用。仿真结果验证了所设计的多目标控制器的正确性以及该无功发生装置仿真模型的有效性。 相似文献
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提出一种基于变论域模糊控制的先进静止无功发生器设计方法.在该方法中,采用优化的比例指数型伸缩因子,对电流环的模糊变量论域进行变换,实现了电流环的自适应控制.利用S函数编程设计了先进静止无功发生器变论域自适应模糊电流控制器,并进行了仿真实验.结果表明,与传统的PID控制相比,基于变论域控制的先进静止无功发生器具有较强的抗扰性能和鲁棒性,改善了电力系统的可靠性并提高其输电能力. 相似文献
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基于DSP控制的新型静止无功补偿控制器的设计 总被引:2,自引:0,他引:2
介绍了一种基于单DSP控制的新型静止无功补偿控制器的设计。该控制器将瞬时无功理论和同步旋转坐标变换运用到无功检测算法中,所设计的控制器控制性能稳定、现场抗干扰能力强;具有分相电压电流采集能力并采用简单的平均检测算法;采用DSP数字信号处理器作为控制核心,软件主要采用C语言编程,硬件软件设计均预留了充足的扩展空间。样机测试表明设计正确,运行稳定,达到了预期要求。 相似文献
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静止无功发生器(SVG)是柔性交流输电系统中的一种重要的控制器.由于以传统的单片机作为控制器的SVG受硬件资源与速度的限制,无法实现对电网的实时动态无功补偿,因此本文提出了一种基于DSP控制新型静止无功发生器的方案,并进行了深入的分析和研究. 相似文献
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提出了静止无功发生器在非理想电源电压情况下,补偿无功电流指令的准确计算方法,并进一步提出了产生补偿电流的预测电流控制法.该方法具有控制精度高,响应速度快,主电路开关频率恒定等优点.理论分析和仿真结果验证了所提出方法的有效性,基于预测电流控制方法的静止无功发生器在非理想电源电压条件下具有良好的工作性能. 相似文献
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Sang-Deok Lee Seul Jung 《International Journal of Control, Automation and Systems》2018,16(3):1103-1111
This article presents an adaptive technique to tune controller gains for the motion synchronization of two gimbal systems by using a recursive least square method in the real-time fashion. In the master-slave configuration, the slave gimbal system follows the master’s motion while the master tracks the reference. In order for the slave gimbal system to synchronize with the motion of the master gimbal system, the dynamic difference between two systems is compensated by the controller gains. The controller gains of the slave are adaptively adjusted by the recursive least square method to cope with the deviation. The performances of three control schemes such as an independent PD control, a dependent torque control, and an RLS torque control scheme are evaluated by the experimental studies for the low cost gimbal systems. Experimental studies confirm that the RLS-based adaptive scheme actually outperforms by adjusting controller gains for the motion synchronization of the master and slave configuration. 相似文献
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位置控制和均衡分配输出控制思想根据轧机HGC位置的实际值与给定值形成一个负反馈,通过比例控制器计算出轧机HGC伺服阀的开口度输出,并将输出分解成主调节量和辅调节量两个分量,由伺服模式控制字选择伺服阀输出其中一个分量,两个伺服阀相互协调以达到均衡分配输出,更好地有效利用伺服阀并保证生产精度的要求。 相似文献
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在分析舰船航行中所受干扰特性的基础上,针对目前舵鳍联合控制中存在的问题,以虚拟控制力作为中间变量,设计了主从结构的舵鳍联合控制策略.主控制器采用非线性干扰观测器对环境扰动和模型不确定性进行估计,在此基础上以虚拟控制力作为控制量采用自抗扰结构,对船舶三自由度运动进行联合控制.同时,在主控制器设计中包含了舵/鳍伺服系统的实际约束,保证了从控制器解的可行性.基于遗传算法设计了数值反演从控制器,求取最终的控制量.通过船模试验和仿真对所设计的控制器进行了验证,试验和仿真结果表明所设计的两步主从控制策略具有较好的控制效果. 相似文献
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This paper presents a new force-reflecting control system for master–slave haptic devices. This controller has been implemented and tested on the robotic systems for minimally invasive neurosurgery developed by our Research Group. Robot-assisted surgery is a very valuable treatment, since it allows benefits of high precision, accuracy, and repeatability of robotic devices. The proposed controller is meant to be used for master–slave haptic robotic surgery, but it can be used for any device that provides haptic feedback. The new controller merges the paradigms of force reflection (FR) control and delayed reference control. Unlike the FR control, the proposed solution enhances the safety since it does not allow an unwanted motion of the slave device once the operator releases the haptic controller. Experimental tests are provided to show the capabilities and the performance of the controller. Closed-loop stability is investigated both theoretically and experimentally. The analytic results on stability impose a limit on the ratio between the measured contact force and the sampling frequency of the closed-loop controller. 相似文献
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本文以旋转运动柔性梁为对象,采用基于胞映射的多目标优化方法进行遥操作系统双边控制研究.首先建立遥操作旋转运动柔性梁系统动力学方程,其次考虑信号传输时滞和系统主从端跟踪误差信号设计主端控制器和从端控制器,并利用Lyapunov稳定性理论获得保证闭环控制系统稳定的控制增益所需要满足的条件.由于满足稳定性条件并不意味着好的控制性能,最后利用基于胞映射的多目标优化方法进行优化控制设计,得到同时满足多个不同目标的控制增益的Pareto最优解集.仿真结果表明所获得的控制增益能够有效实现遥操作系统主从端的信号跟踪,并且操作者能够及时感受到从端环境的变化. 相似文献
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文中介绍基于AVR单片机的一种比较通用的联机系统统分器的软、硬件设计。系统采用主从式结构,主机和从机均以单片机为核心控制器,主机提供多级中英文菜单滚动显示、矩阵式键盘输入、微型打印机接口输出等,通过串行通信对多台从机采集到的数字信号进行实时汇总统计,在实际应用中运行稳定可靠,可扩展性好。 相似文献
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The coordination control design problem for the master–slave system is addressed in this paper. In order to meet the actual work condition, we assume that the master works in a laboratory, the slave works in remote side where the environment is very complex, and the master and slave are in different sizes. Three problems are needed to be solved: system dynamics uncertainties, system kinematics uncertainties, and the asymmetric time-varying delays. The new task-space based Proporation plus damping (P+d) controller and adaptive fuzzy P+d controller are proposed for the master and the slave, respectively. By choosing proper Lyapunov functions, we have proved that the synchronization errors converge to zero asymptotically with the new controllers. The delay-dependent stability criterion is derived. With the given parameters, the proposed allowable maximal transmission delay can be computed. Finally, the simulations are performed to show the effectiveness of the proposed method. 相似文献
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冯子龙 《自动化技术与应用》2008,27(3):79-83
介绍了MODBUS通信,设计并开发了基于MB90F387S单片机的MODBUS通信系统。利用通信主机可方便的实现对具有标准MODBUS通信功能的从机进行联网监控。测试证明,它使用简单方便,工作稳定、可靠。 相似文献