This blocks computes output vector y as product of the gain matrix K with the input signal vector u:
    y = K * u;
Example:
   parameter: K = [0.12 2; 3 1.5]
   results in the following equations:
     | y[1] |     | 0.12  2.00 |   | u[1] |
     |      |  =  |            | * |      |
     | y[2] |     | 3.00  1.50 |   | u[2] |