It is significant to combine multiple tasks into an optimal work package in decision-making of aircraft maintenance to reduce cost,so a cost rate model of combinatorial maintenance is an urgent need.However,the optima...It is significant to combine multiple tasks into an optimal work package in decision-making of aircraft maintenance to reduce cost,so a cost rate model of combinatorial maintenance is an urgent need.However,the optimal combination under various constraints not only involves numerical calculations but also is an NP-hard combinatorial problem.To solve the problem,an adaptive genetic algorithm based on cluster search,which is divided into two phases,is put forward.In the first phase,according to the density,all individuals can be homogeneously scattered over the whole solution space through crossover and mutation and better individuals are collected as candidate cluster centres.In the second phase,the search is confined to the neighbourhood of some selected possible solutions to accurately solve with cluster radius decreasing slowly,meanwhile all clusters continuously move to better regions until all the peaks in the question space is searched.This algorithm can efficiently solve the combination problem.Taking the optimization on decision-making of aircraft maintenance by the algorithm for an example,maintenance which combines multiple parts or tasks can significantly enhance economic benefit when the halt cost is rather high.展开更多
机器人学是现在及未来科技发展的重点,路径规划是机器人学中的一个重要课题.生物界一些群居动物有严格的等级制度和职责分工,受社会群居动物行为启发,提出社会群体搜索算法(social group search algorithm,SGSO).社会群体搜索算法对群...机器人学是现在及未来科技发展的重点,路径规划是机器人学中的一个重要课题.生物界一些群居动物有严格的等级制度和职责分工,受社会群居动物行为启发,提出社会群体搜索算法(social group search algorithm,SGSO).社会群体搜索算法对群体的分类及信息反馈机制——领导-追随机制的制定,降低了早熟的概率,交叉变异和淘汰机制的引入增加了搜索范围,减少了陷入局部最优的可能.同时,对提出的社会群体搜索算法进行了分析,从理论上证明了算法的收敛性;将社会群体搜索算法应用于机器人路径规划进行仿真,从实验中验证了算法的有效性,并与遗传算法和粒子群算法比较,进一步证明了社会群体搜索算法在机器人路径规划问题中的有效性和高效性.展开更多
基金supported by the National Natural Science Foundation of China(6107901361079014+4 种基金61403198)the National Natural Science Funds and Civil Aviaiton Mutual Funds(U1533128U1233114)the Programs of Natural Science Foundation of China and China Civil Aviation Joint Fund(60939003)the Natural Science Foundation of Jiangsu Province in China(BK2011737)
文摘It is significant to combine multiple tasks into an optimal work package in decision-making of aircraft maintenance to reduce cost,so a cost rate model of combinatorial maintenance is an urgent need.However,the optimal combination under various constraints not only involves numerical calculations but also is an NP-hard combinatorial problem.To solve the problem,an adaptive genetic algorithm based on cluster search,which is divided into two phases,is put forward.In the first phase,according to the density,all individuals can be homogeneously scattered over the whole solution space through crossover and mutation and better individuals are collected as candidate cluster centres.In the second phase,the search is confined to the neighbourhood of some selected possible solutions to accurately solve with cluster radius decreasing slowly,meanwhile all clusters continuously move to better regions until all the peaks in the question space is searched.This algorithm can efficiently solve the combination problem.Taking the optimization on decision-making of aircraft maintenance by the algorithm for an example,maintenance which combines multiple parts or tasks can significantly enhance economic benefit when the halt cost is rather high.
文摘机器人学是现在及未来科技发展的重点,路径规划是机器人学中的一个重要课题.生物界一些群居动物有严格的等级制度和职责分工,受社会群居动物行为启发,提出社会群体搜索算法(social group search algorithm,SGSO).社会群体搜索算法对群体的分类及信息反馈机制——领导-追随机制的制定,降低了早熟的概率,交叉变异和淘汰机制的引入增加了搜索范围,减少了陷入局部最优的可能.同时,对提出的社会群体搜索算法进行了分析,从理论上证明了算法的收敛性;将社会群体搜索算法应用于机器人路径规划进行仿真,从实验中验证了算法的有效性,并与遗传算法和粒子群算法比较,进一步证明了社会群体搜索算法在机器人路径规划问题中的有效性和高效性.
