It is shown that reduced order models produced by the least-squares Padé method for discrete-time systems can sometimes produce misleading results for step and polynomial inputs. A more representative way of deriving such models is put forward and a numerical example is given to illustrate the points raised in the discussion.
|Number of pages||4|
|Journal||Proceedings of the Institution of Mechanical Engineers. Part I: Journal of Systems and Control Engineering|
|Publication status||Published - 1 Feb 1999|
- Padé approximation
- Order reduction
- Least-squares method
- Discrete-time systems