共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
3.
针对一类连续模糊定常时滞互联系统,提出了一种模糊分散控制器的控制方法,给出了新的时滞依赖稳定性条件.应用Lyapunov函数法,自由权重矩阵,及线性矩阵不等式(LMIs)方法证明了模糊分散控制系统稳定.仿真结果进一步验证了所提出模糊分散控制方法的有效性. 相似文献
4.
5.
研究了一类带有执行器故障的T-S模糊系统的容错跟踪控制问题。设计中,把模糊控制与自适应控制相结合,提出了一种新的容错控制方法。该控制器由正常控制器和一个自适应控制器组成,能够使得闭环系统稳定,故障状态模型渐近跟踪正常模型,并获得优化的控制性能。应用Lyapunov函数和线性矩阵不等式方法,给出和证明了带有执行器故障的T-S模糊系统的稳定的充分条件。仿真结果进一步验证了所提出的方法的有效性。 相似文献
6.
华静安丽霞李医民 《数学的实践与认识》2015,(7):214-222
针对一类非线性系统,将生物个体对外界环境的适应对策弓J入滑模控制中,在模糊滑模控制的基础上提出了仿生模糊滑模控制方法.该法利用生物随外界环境变化的主动适应性来设计控制器.在实际问题中往往出现建模误差、外界干扰等不确定因素,为了补偿模糊控制器与理想控制器的误差,增加了一个鲁棒控制器.这样使系统具有更强的鲁棒性和抗扰动性,有效避免抖振和消除误差,达到理想状态.同时,利用Lyapunov稳定性理论,证明了闭环系统的全局稳定性.最后对线性系统和倒立摆系统进行了仿真,结果表明了方法的有效性和可行性. 相似文献
7.
《数学的实践与认识》2015,(7)
针对一类非线性系统,将生物个体对外界环境的适应对策弓J入滑模控制中,在模糊滑模控制的基础上提出了仿生模糊滑模控制方法.该法利用生物随外界环境变化的主动适应性来设计控制器.在实际问题中往往出现建模误差、外界干扰等不确定因素,为了补偿模糊控制器与理想控制器的误差,增加了一个鲁棒控制器.这样使系统具有更强的鲁棒性和抗扰动性,有效避免抖振和消除误差,达到理想状态.同时,利用Lyapunov稳定性理论,证明了闭环系统的全局稳定性.最后对线性系统和倒立摆系统进行了仿真,结果表明了方法的有效性和可行性. 相似文献
8.
9.
构造出9类具有函数的泛逼近性能的模糊控制器,这些模糊控制器均由模糊蕴涵算子构造而成.利用倒车仿真说明采用具有函数的泛逼近性能的模糊控制器可以用于实际的模糊控制系统中. 相似文献
10.
检测模糊控制器是否有隐匿缺陷的一种方法 总被引:1,自引:1,他引:0
目的:检测模糊控制系统中的模糊控制器是否有隐匿的缺陷。方法:通过分析Zadeh算子与Einstain算子及2种广义算子之间的内在联系,给出了Zadeh算子与Einstain算子及2种广义算子之间的隶属关系,分别用各类算子检测模糊控制系统中的模糊控制器。结果:在检测模糊控制系统中的模糊控制器是否有隐匿的缺陷时,广义算子(如Einstain算子)是一种非常有效的工具。结论:广义算子(如Einstain算子)能检测出模糊控制系统中的模糊控制器是否有隐匿缺陷。 相似文献
11.
12.
13.
This paper is concerned with interactional models for adults of two species delayed by their mature periods. The existence and local stability of equilibria are discussed thoroughly for competitive systems, cooperative systems and predator-prey systems, respectively. For systems with interaction of competition and cooperation, it is found that the two populations are uniformly persistent if the positive equilibrium is stable. For predator-prey interaction, however, some further conditions are needed to guarantee the persistence of the systems. 相似文献
14.
1引言在电离层动力学和飞行器设计等工程领域,经常遇到具有周期边界条件的椭圆型或抛物型偏微分方程的求解问题.通过适当的离散逼近,此类问题可以转化为大型块状三对角线性方程组的求解问题.1977年,William S.Helliwell提出了一种(Pseudo- Elimination)方法来求解系数矩阵为块状三对角矩阵的线性代数方程组,这种方法具有迭代收敛快及存贮量少等优点.胡家赣等在系数矩阵为对称正定矩阵和对角优势L-矩阵的情况下证明了一次PE方法和一次PE_k方法的收敛性,指出了一次PE方法比 相似文献
15.
Peter Salamon Karl Heinz Hoffmann Anatoly Tsirlin 《Applied Mathematics Letters》2012,25(10):1263-1266
The optimal control for cooling a quantum harmonic oscillator by controlling its frequency is considered. It is shown that this singular problem may be transformed with the proper choice of coordinates to an equivalent problem which is no longer singular. The coordinates used are sufficiently simple that a graphical solution is possible and eliminates the need to use a Weierstrass-like approach to show optimality. The optimal control of this problem is of significance in connection with cooling physical systems to low temperatures. It is also mathematically significant in showing the power and limitations of coordinate transformations for attacking apparently singular problems. 相似文献
16.
In this paper, we study the existence and global attractivity of positive periodic solutions for impulsive predator-prey systems with dispersion and time delays. By using coincidence degree theorem, a set of easily verifiable sufficient conditions are obtained for the existence of at least one strictly positive periodic solutions, and by means of a suitable Lyapunov functional, the uniqueness and global attractivity of positive periodic solution is presented. Some known results subject to the underlying systems without impulses are improved and generalized. 相似文献
17.
半群的模糊内理想 总被引:2,自引:0,他引:2
Abstract The concept of quasi-coincidence of a fuzzy interval value in an interval valued fuzzy set is a generalization of the quasi-coincidence of a fuzzy point in a fuzzy set. With this new concept, the interval valued (∈, ∈ Vq)-fuzzy interior ideal in semigroups is introduced. In fact, this kind of new fuzzy interior ideals is a generalization of fuzzy interior ideals in semigroups. In this paper, this kind of fuzzy interior ideals and related properties will be investigated. Moreover, the concept of a fuzzy subgroup with threshold is extended to the concept of an interval valued fuzzy interior ideal with threshold in semigroups. 相似文献
18.
《Optimization》2012,61(2-3):301-316
The main purpose of the present paper is to develop a structure analysis of the complex systems for the multistate case. We make this analysis by examining the properties of the reliability structure. Particular attention is paid to the different forms of the reliability structure, and to the relationship between them. Moreover, a class of multistate coherent systems is introduced to which, could be restricted, in principle, the study of isotonic systems. Some different subclasses of multistate coherent systems are proposed. In the end, elements of computer assistance in structure analysis of multistate Systems are given 相似文献
19.
Frédérin abwergel Jacques Herbert Ballly Herbert Ballly H Beirao da Veiga VA Solonnikov 《偏微分方程通讯》2013,38(9-10):1323-1358
We study a class of stationary transport equation with nonlocal low-order tems We obtain the existence and uniqueness of a solution in sobolev spaces 相似文献