Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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A New Approach to Design of a Dynamic Output Feedback Stabilizing Control Law for LTI Systems

  • Son Young-Ik (NPT Center & Department of Electrical Engineering, Myongji University) ;
  • Shim Hyungbo (School of Electrical Engineering and Computer Science, Seoul National University) ;
  • Jo Nam-Hoon (School of Electrical Engineering, Soongsil University) ;
  • Kim Kab-Il (NPT Center & Department of Electrical-Engineering, Myongji University,)
  • Published : 2005.02.01
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Abstract

We present a new state-space approach to construct a dynamic output feedback controller which stabilizes a class of linear time invariant systems. All the states of the given system are not measurable and only the output is used to design the stabilizing control law. In the design scheme, however, we first assume that the given system can be stabilized by a feedback law composed of the output and its derivatives of a certain order. Beginning with this assumption, we systematically construct a dynamic system which removes the need of the derivatives. The main advantage of the proposed controller is regarding the controller order, which may be smaller than that of conventional output feedback controller. Using a simple numerical example, it is shown that the order of the proposed controller is indeed smaller than that of reduced-order observer based output feedback controller.

Keywords

References

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