Disturbance Accommodating Control unknown
Known states
• DAC relies on disturbance state estimation based control. • Example of unknown & known formulation of disturbance states z. • Most of the time there are no available or useful measurements. • Frequencies wi are known/estimated from structural analyses. • Attenuation of disturbance states by manipulating values of Q (states) & R (control) matrix elements in lqr method (as an example). • Disturbance States augmented to plant. • Pc is control input. • With this approach can use any applicable state-space design method (pole placement, lqr, or H-inf). 7