Application of Kalman filtering in continuous dynamic traj ectory simulation technique of the captive traj ectory system used in a transonic wind tunnel

The flying traj ectory simulation of the store after being separated from the mother plane is an advanced and difficult technique in wind tunnel test.In this paper,the continuous dy-namic traj ectory simulation technique is studied in the Captive Traj ectory System (CTS)used in a transonic wind tunnel.This paper initially introduces the dynamic trajectory predicting principle. Then,the specific steps of the coordinated control method of continuous dynamic trajectory simu-lation are amply described.The algorithm and constraint condition of the coordinated control and the buffering coordinated control are also discussed.Finally,the Taylor mean value theorem is applied to build a Kalman filtering model to resolve the conflict between filtering delay and accu-racy requirements.After choosing appropriate parameter,the Kalman filtering is used to process the balance signal dynamically and in real time,and the comparison between the continuous dy-namic control process and the move-and-stop control process is carried out.The wind tunnel CTS test result shows that the Kalman filtering can reduce the signal fluctuation greatly,meet the re-al-time requirements of CTS,and dynamic separation trajectory of the continuous dynamic con-trol process metches well with the one of the move-and-stop cortrol,while the wind tunnel CTS test efficiency has also been considerably improved.