基于微分预报的机载雷达稳定平台自抗扰控制系统

Airborne radar stabilized platform active disturbance rejection control system based on differential and forecast

摘要:

为了进一步提高机载雷达稳定平台的抗干扰能力，以满足其愈来愈高的精度需求。提出一种基于“先微分，后预报”的机载雷达稳定平台自抗扰控制方案。对比于传统自抗扰控制器，此方案将扩张状态观测器的扰动观测输出通过微分预报之后在补偿系统的扰动，有效的减少了扰动估计滞后的现象，显著提高了对系统扰动补偿的实时性。通过MATLAB仿真实验表明，“先微分，后预报”自抗扰控制方案的超调量仅有1.11%，稳态时间只有0.52s远远小于PID控制，而其对扰动的响应幅值仅为PID控制的12.8%，且与PID控制相比，其对连续扰动的抑制能力更为优秀。

Abstract:

In order to improve the disturbance rejection ability of the airborne radar stabilized platform to satisfy its increasingly high accuracy requirements. The study proposes an active disturbance rejection control (ADRC) based on “first differential, then forecast”. Compared with the traditional ADRC, the disturbance value which estimated by extended state observer (ESO) to compensated the system after “first differential, then forecast” algorithm, which effectively reduces the disturbance estimation delay and significantly improves the real-time performance of the disturbance compensation of the system. The MATLAB simulation experiment shows that the overshoot of the ADRC based on the “first differential, then forecast” control scheme is only 1.11%, and the steady state time is only 0.52s, which is far less than PID control, and its response amplitude to disturbance is only 12.8% of PID control, and compared with PID control, its has the better performances to suppress continuous disturbance.