Nonlinearity and uncertainty are main factors which restrict the system performance. Bilinear output feedback
control strategy based on model bias separation is proposed, which is the integration of a conventional PID controller and
a linear compensator. The sufficient condition for system exponential stability is proposed. The bilinear output feedback
control obtains the model bias information online, and adopts the simple bilinear control structure, so it has good engineering
significance. The simulation results show the effectiveness of the proposed bilinear output feedback control strategy.