抄録
In the first half, a modified LQ performance index which has a parameter α is given, and a constant output feedback gain is obtained by minimizing it for a large α. In the last half, a necessary condition for optimality is obtained for the modified LQ performance index, and a homotopy approach is taken to obtain locally optimal solutions. But a numerical example shows that the solutions of the corresponding Riccati equation are not connected to the solutions.
