Some practical aspects of a nonrecursive solution to the discrete Riccati equation

The design of computer-based optimal controllers for synchronous machines has been the subject of a number of recent research papers. The design of such controllers generally involves the solution of the steady-state discrete Riccati equation. A method of checking the solution accuracy of a nonrecursive technique based on the eigen-value properties of the canonical state equation, and an example to illustrate the technique, are presented.