The Environmental Disturbance Influence And Response Analysis On Approaching Of Shipboard Aircraft

The aircraft carrier becomes more and more important along with the times, as the main weaponsof aircraft carrier, shipboard aircraft’s importance is self-evident. However with the existence of aft airflow and deck motion, the environment of carrier landing is very bad, which not only increases thedifficulty of manipulation, but also can cause larger ship deviation. Therefore, how to ensure thesafety of carrier landing is research target of this paper.In this paper, numerical simulation of aft flow disturbances is carried out according to air flowmodel in the MTL-F-8575C military standard, while it also be carried out by CFD; And carrier deckmotion is build up by the Conolly linear theory.According to the Nimitz class aircraft carrier and su-33battle plane,the dynamic model ofaircraft carrier and shipboard aircraft is established. By adding the elevator control system and thecharacteristics system of the engine, the shipboard aircraft system is perfected. With the input of theunit step, the dynamic response performance of the aircraft is analyzed, which found that the aircraftdoes not meet the track stability characteristics. Then the aircraft power compensation system isdesigned based on that. The unstablity problem of landing track is solved.The control model of shipboard aircraft landing is established based on classical PID algorithm.The track error is controlled with in-out loop control system. The simulation result shows that themodel conforms to the change of the ideal track, and reaches requirement of track rectification.Finally, with deck motion and aft flow disturbance imported, the process of shipboard aircraftlanding is simulated. The response characteristics of shipboard aircraft with landing control system iscalculated in the landing process. The results show that the influence of carrier deck motion isinhibited effectively while aft flow disturbance isn’t. Therefore a modified model is establishedaccording to the defect in the landing process. The result shows it works well, and the influence of aftflow disturbance is well inhibited.