Bilinear control strategy based on model bias separation is proposed,and it is applied to the yaw control of small-scale unmanned helicopters.The system model is divided into two parts:linear mode1 and uncertainty. The information of uncertainty is online obtained by the novel structure of model bias separation. The c0ntroller is the integration of a conventional linear controller with a linear compensator. The simulation resuits verify the effectiveness of the proposed bilinear control strategy.
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