The design of the control systems of the inertially stabilized platforms (ISPs) as part of airborne equipment for the majority of\naircraft has its peculiarity. The presence of rate gyros in the inertial measurement unit gives the possibility to measure the\nrotation rate of the ISP base, which is the main disturbance interfering with the ISP accuracy. Inclusion of the feedforward\ndisturbance gain in the control law with the simplest PI feedback significantly improves the accuracy of stabilization by the\ninvariance theory. A combination of feedback and feedforward controllers produces a synergetic effect, thus, improving ISP\naccuracy. This article deals with the design of the airborne ISP control systems consisting of two stages: the parametric\noptimization of the PI feedback control based on composite â??performance-robustnessâ? criterion and the augmentation of the\nobtained system with feedforward gain. To prove the efficiency of the proposed control laws, the simulation of the ISP was\nundertaken. We have used a simulation of the heading-hold system of the commuter aircraft Beaver and the yaw rate output of\nthis closed-loop system we have used as a source of the disturbance. The results of modeling proved the efficiency of the\nproposed design method.
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