1function y = regulators2(x,Z1)
 2
 3persistent sumator
 4
 5
 6u1 = Z1(1:end-1)*x;
 7u2 = 0;
 8if isempty(sumator)
 9        sumator = 0;
10        y = 0;
11        return
12end
13
14sumator = sumator + x(1);
15y = sumator;