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1.
Delay-dependent robust control for uncertain discrete singular systems with time-varying delay 总被引：1，自引：0，他引：1
The design problem of delay-dependent robust control For uncertain discrete singular systems with time-varying delay is addressed in this paper. The uncertainty is assumed to be norm-bounded. By establishing a finite sum inequality based on quadratic terms, a new delay-dependent robust stability condition is derived and expressed in terms of linear matrix inequalities （LMIs）. A suitable robust state feedback control law is presented, which guarantees that the resultant closed-loop system is regular, causal and stable for all admissible uncertainties. Numerical examples are given to demonstrate the applicability of the proposed method. 相似文献
2.
李秀英 《通化师范学院学报》2003,24(6):13-16
利用线性矩阵不等式，基于广义系统严格正实引理，给出了一类具有多项式型不确定性广义系统具有鲁棒扩展严格正实性(ESPR)的充分条件，并给出了ESPR控制器的存在条件及设计方法． 相似文献
3.
SU Cheng-li WANG Shu-qing 《浙江大学学报(A卷英文版)》2006,7(10):1723-1732
INTRODUCTION In recent years, research on nonlinear model predictive control has attracted significant attention because most practical processes are nonlinear. In industry process control, model predictive controllers based on linear models (LMPC) are often used to control nonlinear systems. When the operating con- ditions undergo significant changes, the performance of LMPC can deteriorate drastically. Under such conditions, predictive control based on nonlinear models (NMPC) shoul… 相似文献
4.
将向量空间视为由线性变换导出的多项式环上模,利用主理想环上有限生成模的性质给出了不变子空间的一种直和分解方法,并得到了该线性变换在这个不变子空间一组基下的矩阵准对角化方法,介绍了其在可控子空间分解上的应用. 相似文献
5.
A generalized controller based on stability theory of singularly perturbed systems is proposed, to deal with the problem of bounded actuator inputs in robot trajectory tracking control. The saturation function with error-gain matrix is applied in the torque control law, which ensures the upper bound of torque inputs in any given limited range. Through appropriately setting the entries of the error-gain matrix, the tracking performance can be improved. Moreover, a pseudo signal is generated from a linear filter to substitute for the actual velocity error, eliminating the need for velocity measurements. Finally, to verify the effectiveness of the generalized controller, a new saturated controller with error-gain-contained arc tangent function is designed. Comparison experiments show that the proposed controller can strictly guarantee the bound of the torque inputs in situations with non-zero initial tracking errors, and gives a better tracking result than other controllers. 相似文献
6.
研究了一类不确定时滞系统的输出滑模控制器设计问题。在系统状态未知的条件下,利用系统的输出设计滑模切换面,并结合新的趋近率设计系统的到达控制,有效地削弱系统抖振。最后给出一个仿真例子验证了该方法的可行性与有效性。 相似文献
7.
针对网络控制系统中的随机延迟会恶化控制品质,甚至使系统变得不稳定这一问题,把标准预测函数控制算法推广到带随机延迟的网络控制系统中,提出了时戳预测函数控制算法.该算法通过时戳方法来估计网络在控制系统中引入的总延迟,根据系统离散的延迟状态空间模型来预测未来输出,并由预测函数控制的思想得到了适用于网络控制系统的控制规律.在基于TrueTime工具箱搭建的网络控制系统仿真平台上,对比了时戳预测函数算法和传统预测函数算法,系统响应曲线显示前者具有更好的控制品质. 相似文献
8.
ZHANG Ri-dong WANG Shu-qing 《浙江大学学报(A卷英文版)》2006,7(12):1984-1988
INTRODUCTION Bilinear systems are a kind of important nonlinear systems with relatively simple structure, and many industrial processes can be described as a bilinear system. Thus research on the control of this kind of systems is very important. On the other hand, model predictive control (MPC) (Clarke et al., 1987) has been widely used in industrial applications and many predictive control methods focusing on bilinear systems are emerging (Bloemen et al., 2001; Fontes et al., 2004; He… 相似文献
9.
针对一类可转化为“标准块控制形”的MIMO非线性系统,基于动态面控制技术,提出一种鲁棒自适应神经网络控制算法。采用径向基函数神经网络逼近不确定性模型,通过引入一阶滤波器,消除后推设计中由于反复对虚拟控制的求导而导致的复杂性问题,同时补偿项的引入可避免反馈线性化方法中可能出现的控制器奇异性问题,无需控制增益矩阵正定、可逆的条件。利用李亚普诺夫方法,证明了闭环系统是半全局一致终结有界,适当选取设计常数,跟踪误差可收敛到原点的一个小邻域内。计算机仿真结果表明此法的有效性。 相似文献
10.
A great deal of stabilization criteria has been obtained from study of stabilizing interconnected systems. The results obtained are usually based on continuous systems by state feedback. In this paper, decentralized impulsive control is presented to stabilize a class of uncertain interconnected systems based on Lyapunov theory. The system under consideration involves parameter uncertainties and unknown nonlinear interactions among subsystems. Some new criteria of stabilization under impulsive control are established. Two numerical examples are offered to prove the effectiveness and practicality of the proposed method. 相似文献
11.
INTRODUCTIONWiththedevelopmentofscienceandtech-nology,thestructuresofcontrolsystemsaregettingmoreandmorecomplicated.Thiskindofsystemhasthecharacteristicoflargedimension,andin-terconnectionamongsubsystems.Generally,thiskindofsystemiscalledinterconnectedlargesystem.Thestudyofinterconnectedsystemsismotivatedbyquiteanumberofpracticalapplicationsrangingfrompowernetworks,transportation,aerospace,economics,management,andsoon.Thestrategiestocontrolinterconnectedsystemsaredividedintotwokinds:centr… 相似文献
12.
A nonlinear model predictive control problem based on pseudo-linear neural network (PNN) is discussed, in which the second order on-line optimization method is adopted. The recursive computation of Jacobian matrix is investigated. The stability of the closed loop model predictive control system is analyzed based on Lyapunov theory to obtain the sufficient condition for the asymptotical stability of the neural predictive control system. A simulation was carried out for an exothermic first-order reaction in a continuous stirred tank reactor. It is demonstrated that the proposed control strategy is applicable to some of nonlinear systems. 相似文献
13.
王佑恩 《三明高等专科学校学报》2013,(6):9-16
研究Delta算子描述的线性不确定时滞系统的可靠保性能控制问题。考虑系统含有具有凸多面体不确定性参数和连续模型执行器故障,根据Lyapunov稳定性理论,给出对于所有允许的不确定性和执行器故障．均使闭环系统渐近稳定且给定性能指标具有一定上界的状态反馈控制器的存在条件,由此提出相应控制器的设计方法。通过数值算例验证了设计方法的可行性。 相似文献
14.
WANG Yongji WANG Hong Department of Control Science & Engineering Huazhong University of Science &Technology Wuhan Hubei P.R.China Control Systems Centre UMIST PO Box Manchester M QD UK 《重庆大学学报(英文版)》2004,3(1):26-29
~~identificationis7-7-1,where3nm==,andtheRPEalgorithmisusedtoupdatetheweightingofPNN.Thewholetrainingprocessuses800iterations.InordertoovercometheinaccuracyofPNNmodel,thecontrollerstructureisacompositeoneasfbff()()()ututut=+,(37)wherefb()utistheoutputoffeedbackcontroller,ff()utistheoutputofpredictivecontrollerdescribedbyEq.(14),with0.20=,0.40=,andmax5K=.Insimulatedclosedloopcontrol,ufb(t)isaproportionalcontroller,fb()()Putket=and5.0Pk=.Theset-pointofthesystemisd0.15,if040,and120()0.24,if4… 相似文献
15.
Interval standard neural network models for nonlinear systems 总被引：1，自引：0，他引：1
LIU Mei-qin 《浙江大学学报(A卷英文版)》2006,7(4):530-538
INTRODUCTION Neural networks have been successfully em- ployed for controlling nonlinear systems since the 1990’s (Narendra and Parthasarathy 1990; Hunt et al., 1992; Suykens et al., 1996). In these nonlinear control systems, neural networks have been used either for modelling the system to be controlled, or for design- ing a controller, or both. Recently, the robustness issue has been an important focus of research in neuro-control circles (Suykens et al., 1996; Wams et al., 1999; Aya… 相似文献
16.
INTRODUCTIONCRC (CyclicRedundancyChecking)codesarewidelyusedintelecommunication ,especiallyintheinternallayersofprotocolssuchasEther net,X2 5,FDDIandATM (AAL5) .Thecom monhardwaresolutionforCRCcalculationisthelinearfeedbackshiftregister (LFSR) ,charac ter… 相似文献
17.
The State Transition Equation (STE) based method to automatically generate the parallel CRC circuits for any generator polynomial
or required amount of parallelism is presented. The parallel CRC circuit so generated is partially optimized before being
fed to synthesis tools and works properly in our LAN transceiver. Compared with the cascading method, the proposed method
gives better timing results and significantly reduces the synthesis time, in particular.
Project (No. 60271010) supported by the National Natural Science Foundation of China 相似文献
18.
周彩根 《连云港职业技术学院学报》2005,18(3):25-27
对一类具有不确定性的非线性系统，根据滑模控制原理并利用T-S模糊系统的逼近能力，提出了一种自适应模糊滑模控制系统的设计方法。控制结构中采用模糊系统自适应补偿过程的不确定性，利用Lyapunov理论，证明了控制算法是全局稳定的，跟踪误差可收敛到零的一个邻城内。 相似文献
19.
一类不确定非线性广义时滞系统的鲁棒控制与保性能控制 总被引：1，自引：0，他引：1
研究了不确定非线性结构扰动的广义系统的鲁棒控制和保性能控制问题．目的是分别设计系统的鲁棒控制器和保性能控制器。应用线性矩阵不等式方法,分别给出了系统的鲁棒控制器和保性能控制器存在的充分条件;并在这些条件可解时,分别给出了鲁棒控制器和保性能控制器的表达式。最后用例子说明了所给方法的应用． 相似文献
20.
An adaptive backstepping sliding mode control is proposed for a class of uncertain nonlinear systems with input saturation.A command filtered approach is used to prevent input saturation from destroying the adaptive capabilities of neural networks (NNs).The control law and adaptive updating laws of NNs are derived in the sense of Lyapunov function,so the stability can be guaranteed even under the input saturation.The proposed control law is robust against the disturbance,and it can also eliminate the impact of input saturation.Simulation results indicate that the proposed controller has a good performance. 相似文献