Linear active disturbance rejection control of airborne photoelectric stabilized platform

In order to improve disturbance rejection capability and dynamic response characteristics of airborne photoelectric stability platform, the improved control method study was conducted on platform based on Linear Active Disturbance Rejection Control (LADRC). The Model-assisted Reduced-order Linear Extended State Observer (MRLESO) was used by the improved Linear Active Disturbance Rejection Controller (ILADRC), and used output of system and differential of output were used to generate the control quantity,which not only reduced phase lag and burden of observer, improved ability of estimation of observer, but also reduced the negative effects of observer with lag and estimation error of control law. The simulation experimental results show that the ILADRC had better frequency domain characteristics in the low-middle frequency band, ILADRC had better dynamic response characteristics in step response experiment, under the conditions of system had no input, sine wave moment disturbance and sine wave angular velocity disturbance with amplitude are and frequency of 2.5 Hz were applied to the system, the residual peak value of system output based LADRC were 0.175()/s and 0.566()/s. The residual peak value of system output based ILADRC were 0.175 ()/s and 0.566 ()/s. The simulation results demonstrate the validity of improved control method.