## 12 Border Design For Hardtail

If duration of separate impulses of Dt in sequence exceeds 10 microsec (and the frequency of following of f> 1 Hz), for an impulse NDt duration for restriction of an obluchennost take (1/N) - part of MDU.

if Dt of a series is less than 10 microsec, for duration of an equivalent impulse take duration of the shortest impulse in a series, and for power influence — total (power influence of all series is full;

In the presence of sequence of impulses not only any of them, but also an average obluchennost should not exceed MDU. When averaging influence of sequence of impulses with Dt duration <10 microsec and the frequency of repetition of f> 1 Hz of MDU of a single impulse has to be reduced in C5 of times:

the most powerful equivalent impulse representing sequence (group) of n <10 impulses repeating with quasiregular intervals. Thus the power exposition of an equivalent impulse is equal to a full power exposition of group of impulses, and duration of an equivalent impulse is equal or the smallest duration of an impulse in group (at Dtgr <10 microsec), or the sum of dlitelnost of separate impulses in group (at Dtgr> 10 microsec).

the most powerful impulse of sequence from n of impulses (during classification) with an instant frequency of repetition of impulses (determined by the shortest interval) f> 1 Hz. However with duration of separate impulses of Dt <10 microsec reduce value of a contribution of each separate impulse by value of coefficient of C5; at Dt> 10 microsec single consider an impulse as duration T=Dt×n and value of its contribution reduce in n of times;

if Dt of a series is more than 10 microsec, for duration of an equivalent impulse take the total duration of partsialny impulses, and for power influence — total power influence of all series.