Analysis And Optimization Research On The Aircraft Carrier's Flight Deck's Operational Capability

Aircraft carriers are among the largest surface combat ships with their main strike forces of aircrafts onboard and they have many advantages like combining naval and aero forces,excellent maneuverability,strong survivability,and being both offensive and defensive.The performance of flight deck has a strong influence on carrier's combat capability.The research work of this thesis was conducted from 3 views which are layout design,aircraft guarantee and combat depression.Then,key technical problems about flight deck's operational capability were deeply researched and analyzed.The flight deck is divided into the launching area,landing area,and parking area.While the principal dimensions are limited,all the design elements may have conflicts with each other and should be balanced.From global view of the flight deck layout design,the main technical problems and the influencing factors were analyzed and their balancing principle and the dendrogram was drawn.This would provide the essential evidence for the optimization or evaluation related with the flight deck design.Based on the layout design elements' longitudinal positions on flight deck's right expanded area,the dimensionless optimization variables were extracted.Synthetically considering all the layout design constraints,based on some typical foreign aircraft carriers' design parameters,the objective functions were constructed.Thus,the multi-objective optimization model for flight deck's right expanded area was established and it was solved with the help of the improved multi-objective gravitational search algorithm.By solving this optimization model,considering the island with different size,a series of flight deck's right expanded area arrangement designs can be gained separately which obeyed the mainstream design laws and they could provide reference for the flight deck's general arrangement design.To research the pitstop guarantee mode's improvement on the sortie and recovery capability compared with the traditional concentrated guarantee mode,the closed queuing network was used to simulate these 2 kind of aircraft guarantee modes.By analyzing the 2 calculation results,the data of improvement was gained.This could provide technical support for choosing the aircraft guarantee mode and configuring the number of pitstop guarantee stations.The carrier-borne UAVs should obey the specific parameterized scheduling policies to operate aircraft guarantee work,so the multiplicative weights apprenticeship learning algorithm was applied to constructing the method for generating the scheduling policies for aircraft guarantee work.Thereinto,after both the situations of learning from a human expert and with no expert available were studied,it can be inferred that in the latter situation the learned policy performed more excellent than the human experts.Additionally,the scheduling policy optimized by the simulated annealing algorithm was also compared with the learned policy generated by the MWAL algorithm to examine the apprenticeship learning methods' advantages when dealing with the problem of aircraft guarantee scheduling on the flight deck.The flight deck's operation network was established with the network theory and the flowing of command information and the transferring of the aircrafts were 2 parts of this network.According to the feature of circulating,the index of network integrity was calculated based on the number of some existing particular circuits.During the simulative calculation,the vertexes were randomly chosen to be damaged.The data of the changing tendency of the index of network integrity and the rate of the network being destroyed with the increase of the damaged vertexes were collected to analyze the flight deck's operation network's sensitivity to the loss of vertexes.By studying the situations of the vertexes which represented different kinds of aircraft guarantee work being damaged,it can be inferred that the vertexes of commanding and landing played a very important role in maintaining the flight deck's operation network's functional integrity.The sortie generation rate could be chosen as the index to evaluate the combat depression characteristics of the flight deck.The enemy's anti-ship missiles and the carrier battle group conducted the combat of penetration and interception.When the missiles succeeded in penetrating,they would hit specific area of the flight deck in a certain probability and damage the aircraft guarantee resource on it.The functional integrity of the aircraft guarantee resources could be presented by the insurance degrees and the latter ones were input on the sortie generation calculation model based on the queuing network to obtain the data about the sortie and recovery capability.When the number of enemy's missiles changed,the change tendency of the combat depression characteristics of the flight deck could be calculated.With this method,some possible improvable suggestions could be quantitatively analyzed.