Research On Transfer Alignment Method Of Inertial Guidence System In Carrier-based Aircraft

Aircraft Carrier is the essential condition for constructing a so call “Blue Ocean Navy” and also a vital guarantee to improve the deterrent force and area influence. Either the conventional power or nuclear power Carrier, a lot of aircraft and weapons is equipped. With the strong and powerful supplement of battleship groups, the aircraft has become the vital force of the modern navy. Due to the demand of fast, efficiency and integration, the preparation before Carrier-based aircraft take off should be as less as possible. Above all, how to process the alignment precisely and quickly, realizing the rapid taking off is the most urgent problem needed to be solved.This dissertation focus on the key point of inertial alignment before carrier-based aircraft taking off. Firstly considering the feature of inertial guidance and aircraft-carrier,we introduce the necessary and possibility of transfer alignment between aircraft and carrier, analyzing the overseas and domestic research s tatus about deck deformation modelling, models of sea waves, prediction of warships motivation and so on. Summarizing the conditions of transfer alignment through matched methods, observability, error algorithm and so on.What is coming next is analyzing the environment of warships, enumerating the model of sea spectra. Researching on the method of predicting the motivation of warships under the sea waves’ influence with the P-M spectra. Verifying the sea spectra and prediction method through numerical simulation.Based on the research above, defining the coordinates during transfer alignment process, modelling the transfer alignment model under the geography coordinate, deducing the error transfer model of inertial guidance and designing the transfer alignment filter with velocity matching, attitude matching, velocity plus attitude matching and so on. Based on the maneuver detecting and observability analysis method, proposing a new adaptive error-tolerant transfer alignment filter to suit different ocean conditions.In the end, analyzing the influence and fixing method of reference information time delay, lever arm effects and deck dynamic deformation. Especially the conditions of deck such as none deformation, statics deformation and dynamic deformation and so on. So called velocity plus attitude plus integrated angle velocity matching method is proposed to solved the deck deformations’ influence on transfer alignment. Some simulation was under taking to verifying that the method is validity and efficiency.