Gerhard Schreier

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This paper gives necessary and sufficient conditions to solve in a constructive way the transformation of a general multiple-input–singleoutput nonlinear system into a state affine system. This result is direct i.e., without solving the state elimination problem when computing the inputoutput differential equation. A Kalman-like observer can be designed for(More)
It is well-known that when a state control law is designed its application is limited if the components of the state vector are not all measurable. This problem can be overcome by using observers. For linear systems, it is traditionally solved by using either a Luenberger observer or Kalman-filter. Moreover, the observability property for linear systems(More)
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