By Andrew N. Krasovskii, Nikolai N. Krasovskii

The mathematical concept of keep an eye on, primarily built over the past many years, is used for fixing many difficulties of sensible significance. The potency of its purposes has elevated in reference to the refine ment of desktop strategies and the corresponding mathematical gentle ware. Real-time regulate schemes that come with computer-realized blocks are, for instance, attracting ever extra awareness. the speculation of regulate offers summary versions of managed structures and the techniques learned in them. This conception investigates those versions, proposes equipment for solv ing the corresponding difficulties and shows how you can build keep an eye on algorithms and the equipment in their desktop awareness. the standard scheme of keep an eye on is the next: there's an item F whose nation at each time immediate t is defined by way of a part variable x. the article is subjected to a regulate motion u. This motion is generated via a regulate machine U. the article can be laid low with a disturbance v generated by means of the surroundings. the data at the country of the method is provided to the generator U via the informational variable y. The mathematical personality of the variables x, u, v and yare decided via the character of the system.

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**Example text**

Let us recall that strategies of this type were already used in Section 1 for a special case of the problem. 3) a pure positional strategy of the first player. 12); and Cu is a parameter. 3). It is a so-called parameter of accuracy. The sense of this parameter Cu and its role in the solution of the problem will be evident in subsequent sections. 3), the value of parameter Cu > 0 and a partition i = 1, ... , ku, 4:)+1 = 79} of the time interval [t*, 79]. 4) ku is some natural number. 5) together with an admissible realization of disturbances v[t*[·]'l9) is defined in the following way.

40) for every fixed {t, x[t], y[t], E} defines the collection of the numbers PI 2: 0, L,t=l PI = 1, which are the probabilities of the corresponding events. 38). ), are not used in any random tests. 38) in deterministic way. 51 ) We assume that the initial states x* and y* are sufficiently close to each other. 38) we can take y* = x*. 42). ]79] = {Yu,v[t;[·]t H1 ] = {Yu,v[t], i = 1, ... 38) with the help of the computer. We emphasize that the mechanism that forms the disturbances v[t] is unknown to us.

8), we do not know what to do in this situation. 6) 43 1. 6). 7). 8). 9]). 9]), which we call the positional functionals. 9) where the functional f3(x[t*[·]t*), a) (for an arbitrary admissible fixed history x[t*[·]t*)) is continuous and nondecreasing in a. 9]). 9). 9) it can be proved [55J that the above hypothesis holds. In other words, we can successfully form the minimizing control action u[tJ and the maximizing disturbance v[tJ (in the feedback control schemes) using only the information about the position {t, x [t]} (or {ti, X[ti]}, t; ::; t < ti+l) that is realized at the current time moment t (or t;).