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1.
Y2000-62122-1 0101473不确定时延系统鲁捧跟踪线性控制器=Linear con-troller for robust tracking of uncertain time-delay systems[会.英]/Bashar.A M.H.//1999 IEEE Proceedingsof Soutbeastcon’99 Technology on the brink of 2000.—1~9(NiK)本文研究了一类含有确定性元素时延动态系统的线性鲁棒跟踪控制器。系统的输人矩阵和对象不确定,且对象的状态具有时延,不确定参数的可用信息为参数位于的有界集合。线性控制器用于使不确定时延  相似文献   

2.
针对网络控制系统存在的不确定时延及丢包问题,提出基于灰色预测的H∞鲁棒控制器设计方法。将控制器输出端至传感器部分等价为灰色系统的被控对象,建立离散控制系统模型,引入灰色预测算法,运用等维新息模型GM(1.1),取时延输出序列,预测下一时刻时延,确定控制器的输出。构造Lyapunov-Krasovskii函数,结合LMI方法给出了系统稳定的充分条件及控制器设计方法。仿真实例说明预测的引入降低了系统随机性,有效的提高系统控制精度。  相似文献   

3.
冯达 《通讯世界》2016,(2):94-95
控制对象的时滞现象普遍存在,使用简单的PID控制器很难取得很好的效果.本文提出了一种基于遗传算法的PID控制器参数优化设计方法,对带有惯性环节和时滞环节的试验系统进行了仿真实验,结果表明遗传算法是一种简单高效的寻优算法,与传统的寻优方法相比明显地改善了控制系统的动态响应性能.  相似文献   

4.
研究一类不确定非线性时滞系统的鲁棒容错控制问题.针对不确定非线性时滞系统,基于执行器连续型增益故障模式,利用Lyapunov-Krasovskii泛函方法和线性矩阵不等式方法,推导了当一类非线性不确定系统满足一定范数有界条件时,闭环系统时滞无关鲁棒容错控制器存在的充分条件,并给出了状态反馈鲁棒容错控制器的设计方法.将所设计的状态反馈控制方法应用于某一非线性不确定时滞系统,仿真结果表明设计的控制器不仅使得该故障系统对于执行器故障具有完整性,并且能达到给定的H∞性能指标,从而验证了所提出方法的可行性和有效性.  相似文献   

5.
设计了基于网络化技术的电机控制与测量系统方案.给出系统硬件组成,实现6路PWM控制通道,5路电机速度检测通道,并通过SPI接口与NETCON控制器完成通信.解决了对电机控制系统多路电机中任一路电机的转速与相位的实时监控,实现了单片机与ARM系列处理器之间的通信.此电机控制系统与嵌入式网络化控制器组合于一体能够完成对水箱、数控机床、机械手等模型的控制.  相似文献   

6.
针对传统的不确定时滞的鲁棒控制系统不能满足现代电力系统发展的需求,提出一种基于不确定非线性智能电网感知云网络化控制识别方法。使用传统的数据值和基于电力网络到网络系统模型作为电力感知网络到网络模型的电力云网络,控制数据优化使用电源感知网络,而不是利用控制节点的预测值,突破了鲁棒控制的不确定时滞系统的控制效果。运用感知模型中的正向云算法修正加权系数,仿真实验证明,该识别方法能够很好地优化传统的不确定时滞鲁棒控制电力系统,具有良好的适应性和鲁棒控制性,进一步提高了智能电网传感云网络控制的各项性能指标。  相似文献   

7.
传统门禁控制系统并不支持出入口控制器系统的网络化,本文通过引入通信平台,给出了一种实现TCP/IP的新方法,通信平台在操作软件客户端和控制器之间架起了TCP通道,通过对串口数据和客户端TCP/IP数据包进行转换可以任意客户端访问网络节点上的硬件服务器,实现TCP/IP通信,减少系统施工布线.  相似文献   

8.
针讨网络控制系统中由于不确定时延引起的系统模型的不确定性,将不确定对象建立为模糊模型,运用模糊自校正控制的方法对网络控制系统中的时延进行补偿.该方法降低了时延对系统的影响,实现了对网络控制系统的时延补偿.采用truetime工具箱对控制系统进行仿真,结果表明,运用模糊自校正方法补偿后的控制效果有了明显的提高.  相似文献   

9.
在网络控制系统中,由于网络时廷的存在,导致系统性能下降甚至不稳定.文中提出了一种基于β增益的网络控制系统时延补偿方案,该方案能够根据当前网络时延和阻塞等状况适时的修改现有的控制器的输出,使得现有的控制器能够适应于不同网络状况下的网络控制系统,从而达到时延补偿的目的.因为不是修改原始的控制算法,所以可将现有的传统控制器直接升级为网络控制器.  相似文献   

10.
李庆领  金常鑫 《电子科技》2010,23(10):76-78
在系统具有时滞性和非线性不确定因素的情况下,为保持Smith预估器与被控对象的一致性,运用非线性PI控制器,消除系统中不确定因素的影响。通过仿真试验,证明Smith预估器和非线性PI控制器算法的结合,可以使具有非线性不确定性的时滞系统达到理想的控制目标。  相似文献   

11.
State feedback controller design of networked control systems   总被引:7,自引:0,他引:7  
This paper is concerned with the controller design of networked control systems (NCS). A new model of the NCSs is provided under consideration of both the network-induced delay and the data packet dropout in the transmission. In terms of the given model, a controller design method is proposed based on a delay-dependent approach. The feedback gain of a memoryless controller and the maximum allowable value of the network-induced delay can be derived by solving a set of linear matrix inequalities. Two examples are given to show the effectiveness of our method.  相似文献   

12.
A new method is proposed to improve the state feedback controller design for networked control systems (NCSs) taking both network-induced time delay and packet dropout into account in this paper. An appropriate Lyapunov functional is introduced to establish the improved sufficient stabilizability conditions for NCSs with memoryless state feedback controller by considering an additional useful term when estimating the upper bound of the derivative of Lyapunov functional and introducing new free weight matrices. Based on this less conservative existence condition, a networked controller design method is derived, which is equivalent to the solvability of a set of linear matrix inequalities. Numerical example is given to demonstrate the effectiveness and benefits of the proposed method.  相似文献   

13.
This paper is concerned with the design of networked control systems with random network-induced delay and data dropout. It presents a new control scheme, which is termed networked predictive control with optimal estimation. Based on Multirate Kalman Filtering, the measured data which are out of sequence or delayed can be used to improve the precision of estimation. The control prediction generator provides a set of future control predictions to make the closed-loop system achieve the desired control performance and the compensator removes the effects of the network transmission with time delay and data dropout. Simulation results are presented to illustrate the effectiveness of the control strategy via comparing with control schemes without any compensation for the network.  相似文献   

14.
The problems of signal transmission delay, actuator data packet dropout, and measurement quantization in nonlinear networked control systems are investigated in this paper. First, a nonlinear system is represented as a series of linear systems through T–S fuzzy modeling, then the problem of actuator data packet dropout is solved through the introduction of a diagonal matrix; second, the problem of maintaining order is solved through the ZOH, and the problem of limited bandwidth is solved through the measurement quantization; and finally, the controller is designed to compensate the actuator data packet dropout.  相似文献   

15.
This paper develops a guaranteed cost networked control (GCNC) method for Takagi-Sugeno (T-S) fuzzy systems with time delays. The state feedback controller is designed via the networked control system (NCS) theory. The stability of the overall fuzzy system using GCNC is also established. Network-induced delay in network transmission and packet dropout are analyzed. Some deductions are also extended to uncertain systems. Simulation results show the validity of the present control scheme  相似文献   

16.
陈刚  朱红求  阳春华  胡春华 《通信学报》2012,33(12):116-122
针对一类具有非理想网络状况,如时变网络时滞、分组丢失和乱序等问题的基于动态输出反馈控制器的网络控制系统,建立了多时滞Lurie网络控制系统模型,应用Lyapunov-Krasovskii泛函方法,保留Lyapunov-Krasovskii泛函导数中经常被忽略的有用项,提出了一种具有更低保守性的多时滞Lurie网络控制系统时滞相关稳定条件。并通过增加一等式约束将非线性矩阵不等式转化为线性矩阵不等式表示的可解性问题,给出了一种动态输出反馈控制器的设计方法。数值实例表明该设计方法具有更低的保守性。  相似文献   

17.
刘金良 《电子学报》2012,40(12):2557-2561
 本文对一类网络环境下的离散线性系统进行了可靠性滤波器设计,其中用一组随机变量来表示传感器的概率性失真,并综合考虑网络环境的时滞、错序、丢包等非理想服务质量,建立了包含传感器随机失真的系统模型;通过使用李亚普诺夫泛函稳定性理论和线性矩阵不等式技术给出了可靠性滤波器设计算法存在可行解的充分性条件,最后通过数值算例验证本文给出方法的有效性.  相似文献   

18.
The design problem of networked control systems (NCS) with constant and random network delay in the forward and feedback channels, respectively, is considered in this paper. A novel networked predictive control (NPC) scheme is proposed to overcome the effects of network delay and data dropout. Stability criteria of closed-loop NPC systems are presented. The necessary and sufficient conditions for the stability of closed-loop NCS with constant time delay are given. Furthermore, it is shown that a closed-loop NPC system with bounded random network delay is stable if its corresponding switched system is stable. Both simulation study and practical experiments show the effectiveness of the control scheme  相似文献   

19.
Remote fuzzy logic control of networked control system via Profibus-DP   总被引:1,自引:0,他引:1  
This paper focuses on the feasibility of fuzzy logic control for networked control systems (NCSs). In order to evaluate its feasibility, a networked control system for servo motor control is implemented on a Profibus-DP network. The NCS consists of several independent, but interacting, processes running on two separate stations. By using this NCS, the network-induced delay is analyzed to find the cause of the delay. Furthermore, the fuzzy logic controller's performance is compared with that of conventional proportional-integral-derivative controllers. Based on the experimental results, it is found that the fuzzy logic controller can be a viable choice for an NCS due to its robustness against parameter uncertainty.  相似文献   

20.
针对不确定性时延转化为固定时延的数据包丢失模型,改进补偿数据包丢失的方法.将时延大于一个采样周期的数据描述为数据包丢包,采用自适应线性预测方法对丢失的数据进行补偿,仿真结果表明所提到的补偿方法是有效的.  相似文献   

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