Robustness of maximum entropy compensators with respect to simultaneous parameter variations

Robustness with respect to parameter uncertainties is an important criterion in the design of control systems. This is used as a basis to measure alternative compensator design methods. Two design approaches, linear quadratic Gaussian (LQG) and maximum entropy (ME), are investigated comparatively in order to determine superiority by this standard. Exact stability margins with respect to simultaneous plant parameter variations are determined for both design methods using the method of R.R. de Gaston and M.G. Safonov (IEEE Trans. Autom. Contr., vol.33, no.2, p.156-71, 1988)