Browsing by Author "Yudilevitch, G."
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Optimal Decoupling Control(1994) Yudilevitch, G.; Levine, W.S.; ISRA new approach to optimal decoupling for multi-input multi-output (MIMO), linear, time-invariant control systems, is presented. This general optimal decoupling method is based on the minimization of componentwise performance indices. These indices can be obtained from alternative componentwise mathematical representations of the original system. Furthermore, using these representations, optimal decoupling problems can be written in terms of ordinary optimal control problems. Then one can use classical optimal control techniques such as LQR of Hto obtain the ideal solutions to the optimal decoupling problems.However these techniques can not be used to obtain practical closed-loop solutions. In this dissertation, fixed structure control techniques are used to derive the optimal and sub-optimal state feedback control law. For this purpose, a globally convergent numerical algorithm is derived. In addition some other global sub-optimal solutions are studied. This approach is used in the design of an attitude flight control of the UH-60A helicopter in hover.
Item Techniques for Designing Rotorcraft Control Systems, Final Report(1994) Yudilevitch, G.; Levine, William S.; ISROver the last two and a half years we have been demonstrating a new methodology for the design of rotorcraft flight control systems (FCS) to meet handling qualities requirements. This method is based on multicriterion optimization as implemented in the optimization package CONSOL-OPTCAD (C-O). This package has been developed at the Institute for Systems Research (ISR) at the University of Maryland at College Park. This design methodology has been applied to the design of a FCS for the UH-60A helicopter in hover having the ADOCS control structure. The controller parameters have been optimized to meet the ADS-33C specifications. Furthermore, using this approach, an optimal (minimum control energy) controller has been obtained and trade- off studies have been performed.