Question: Exercise Parametric zero uncertainty in zero form Consider the following alternative form of parametric zero uncertainty Gps s zpGs zmin zp

Exercise  Parametric zero uncertainty in zero form

Consider the following alternative form of parametric zero uncertainty Gps  s  zpGs zmin  zp  zmax  

which caters for zeros crossing from the LHP to the RHP through the origin

corresponding to a sign change in the steadystate gain Show that the resulting multiplicative weight is wI s  rz zs  z and explain why the set of plants given by  is entirely dierent from that with the zero uncertainty in time constant

form in  Explain what the implications are for control if rz  

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