Projective Controls for Disturbance Attenuation in LSS Systems

A design methodology is presented which addresses three main issues in the control of Large Space Structures: improving the disturbance attenuation of the system. implementing the design as a low order output feedback controller and ensuring that the controller is robust to modeling uncertainty. The method developed to solve this problem makes use of projective controls. A new frequency domain characterization of the disturbance attenuation properties of projective controllers is developed in order to use design freedoms in the controllers to achieve robust disturbance attenuation. A 20 mode LSS example demonstrates the use of this methodology.