间接控制系统部分变元对稳定性

ｉ）对变量分离型间接控制系统，本文给出其平凡解关于部分变元绝对稳定的充要条件。ｉｉ）对非变量分离型间接控制系统，给出其平凡解关于部分变元绝对稳定的充分条件。     

论Лурье间接控制系统绝对稳定的充要条件

本文通过拓扑变换,将间接控制系统化为变量分离的非线性控制系统,引进部分变元绝对稳定的概念,得到绝对稳定的充要条件,理论上解决了悬而未决的问题,然后给出一系列新的实用的充分条件。     

几类Lurie型控制系统绝对稳定性充分必要条件

本借助部分变元绝对稳定性的充要条件，得出几类Lurie型控制系统绝对稳定性充分必要条件，这些判据为显式的代数形式，易于验证，也便于在实践中应用。     

变时滞退化Lurie控制系统的绝对稳定性

研究了变时滞退化Lurie控制系统的绝对稳定性问题.基于Lyapunov稳定性理论,利用线性矩阵不等式方法给出了系统绝对稳定的判别准则.讨论了变时滞退化Lurie直接控制系统和间接控制系统的绝对稳定性,得到绝对稳定性的充分条件仅依赖于时滞导数的大小,且时滞可以是无界函数：最后给出了实例说明本文结果的有效性.     

n维LUR型直接控制系统在主要情况下绝对稳定的充要条件

在本文中我们将n维Luré型直接控制系统变换成为变量分离的非线性系统,引进部分变元绝对稳定的新概念,得到n维Luré型直接控制系统在主要情况(A稳定)下绝对稳定的充要条件,同时,给出了一些充分条件。     

一般离散型Lurie控制系统的绝对稳定性

本文给出一类一般离散型Ｌｕｒｉｅ控制系统绝对稳定的充要条件及充分条件     

一类间接控制系统的绝对稳定性问题

利用厄米特二次型和若当标准形理论研究了一般间接控制系统的绝对稳定性问题,给出了绝对稳定性的代数形式的判别准则。所得到的结果是新的和有用的。     

关于控制系统的绝对稳定性准则

本文:1.给出非线性控制系统第二标准型[2]平凡解绝对稳定性准则,特别地给出了飞机纵向运动方程平凡解绝对稳定性准则,文[8][9]中关于飞机纵向运动方程的结果是本文推论2.2的特例;2.给出非线性控制系统第一标准型[2]平凡解在通常情况和一种临界情况下绝对稳定准则;3.给出了Lure型直接控制系统一般型平凡解绝对稳定若干准则,全文结果均根据系统本身的参数,具体构造函数,给出显式判据.     

Лурье控制系统绝对稳定的新判据

本文导出了Лурье控制系统零解绝对稳定的新的必要条件,给出几类控制系统零解绝对稳定的新判据.     

离散Lurie直接控制系统的绝对稳定性

本文首先讨论了一类离散直接控制系统的绝对稳定性，得到了该系统为绝对稳定的充要条件，然后又讨论了另一类直接控制系统的绝对稳定性，得到了一个新的充分条件。     

线性离散系统的部分稳定性

In this paper, we study the partial stability of linear discrete systems by means of Liapunov's functions of quadratic form . We obtain a necessary and sufficient condition for the system being stable with respect to part of variables and generalize Liapunov's equation to the partial stability of linear discrete systems . A method of constructing Liapunov's function of quadratic form for the stability of the systems is given.     

Partial uniform boundedness of solutions of systems of differential equations with partly controlled initial conditions

We introduce the notion of partial uniform boundedness of solutions with partially controlled initial conditions in the general case, that is, the case in which the part of variables with respect to which the boundedness of solutions is studied is a subset of the part of variables with respect to which the initial conditions are controlled. We obtain a criterion for the partial uniform boundedness of solutions with partly controlled initial conditions. We introduce the notion of partial total boundedness of solutions with partly controlled initial conditions. We obtain a sufficient condition for the partial total boundedness of solutions with partly controlled initial conditions.     

Ultimate boundedness with respect to part of the variables of solutions of systems of differential equations with partly controlled initial conditions

We introduce the notions of equiultimate boundedness and uniform ultimate boundedness with respect to part of the variables for solutions with partly controlled initial conditions. We obtain sufficient conditions for the equiultimate boundedness and uniform ultimate boundedness with respect to part of the variables of solutions with partly controlled initial conditions. We introduce the notions of equiboundedness and uniform boundedness with respect to part of the variables for solutions of systems with partly controlled initial conditions. We obtain sufficient conditions for the equiboundedness and uniform boundedness with respect to part of the variables of solutions with partly controlled initial conditions.     

Version of the elimination method for a system of partial differential equations

For a system of three first-order partial differential equations with three independent variables, we obtain sufficient conditions for one component of the solution to satisfy a third-order Bianchi equation. We also obtain conditions for the solvability of this system by quadratures.     

Stability of motion of linear systems relative to some of the variables

Using the method of Lyapunov functions, we obtain the sufficient conditions for asymptotic stability of linear systems with constant coefficients, with respect to some of the variables.     

Generalized functions which are analytic with respect to some of their variables

For a generalized function which is analytic with respect to some of its variables in the sense of Gording and Malgrange we prove a theorem on representation in the form of a power series in these variables which converges in D′ and a corresponding uniqueness theorem. We also obtain necessary and sufficient conditions for a generalized function to be entire with respect to some of its variables.     

On equi-asymptotic stability with respect to part of the variables

A system of equations of perturbed motion in which the right-hand sides are almost periodic functions of time is considered. A sufficient condition for the trivial solution of the system to be equi-asymptotically stable with respect to part of the variables is proved.     

Discrete infinite-dimensional type-K monotone dynamical systems and time-periodic reaction-diffusion systems

The asymptotic behavior of discrete type-K monotone dynamical systems and reaction-diffusion equations is investigated. The studying content includes the index theory for fixed points, permanence, global stability, convergence everywhere and coexistence. It is shown that the system has a globally asymptotically stable fixed point if every fixed point is locally asymptotically stable with respect to the face it belongs to and at this point the principal eigenvalue of the diagonal partial derivative about any component not belonging to the face is not one. A nice result presented is the sufficient and necessary conditions for the system to have a globally asymptotically stable positive fixed point. It can be used to establish the sufficient conditions for the system to persist uniformly and the convergent result for all orbits. Applications are made to time-periodic Lotka-Volterra systems with diffusion, and sufficient conditions for such systems to have a unique positive periodic solution attracting all positive initial value functions are given. For more general time-periodic type-K monotone reaction-diffusion systems with spatial homogeneity, a simple condition is given to guarantee the convergence of all positive solutions.     

Partial stability and stabilization of dynamical systems

We prove the theorem on necessary and sufficient conditions of partial instability and the theorem on partial stabilization of nonlinear dynamical systems. We obtain sufficient conditions of controllability for systems linear with respect to control. We also study the problem of control and stabilization of an angular motion of a solid body by rotors.Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 47, No. 2, pp. 186–193, February, 1995.     

An algebraic method for investigating stability of linear normal systems of partial differential equations

In certain special classes of linear normal systems of partial differential equations, sufficient conditions for the trivial solution of the Cauchy problem to be stable can be phrased in terms of the coefficients. The determination of such classes is based on a modified method of majorants, combined with the use of n-dimensional hypercomplex numbers with associative-commutative multiplication.Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 44, No. 4, pp. 480–489, April, 1992.