Delay-Compound-Compensation Control for Photoelectric Tracking System Based on Improved Smith Predictor Scheme

High control bandwidth is usually restricted in a photoelectric tracking system (PTS) based on Charge-Couple Device(CCD) with time delay, which hinders good performance. Generally, model-based delay-compensation controller called Smith predictor (SP) can help increase the gain to promote by separating delay from loop. However, performance promotion insufficient because still stays forward channel causes errors between output and input. And of limited due effect model mismatch stability. In this paper, solve problems, delay-compound-compensation (DCCC) improved SP trajectory prediction velocity feedforward proposed. The additional used further eliminate existing channel. reform transfer characteristics gain. A Kalman filter-based design method presented optimal principle feedback controllers given face mismatch. Experiments demonstrate that DCCC valid could greatly low frequency.