弹药协调器定位故障是火炮弹药自动装填系统的典型故障,其动作可靠性受多个不确定性因素影响,显式的极限状态方程难以获得。为计算协调器动作可靠性的定量数值,对协调器进行了不确定性建模,并根据标准状态的测试数据对模型进行了修正,构建了基于径向基神经网络的代理模型以提高计算效率,将网络输出与原始样本数据进行对比。结果表明,径向基神经网络能够很好地拟合原始模型。对代理模型进行了Monte-Carlo仿真分析,求解了定位误差的概率分布,弹药协调器的动作可靠性估计值为92.48%。
Abstract
Positioning failure of shell transfer arm is a typical fault of automatic ammunition loading-system of howitzer.The action reliability depends on several uncertainty variables.The explicit limit state function is nearly unavailable.To calculate the quantitative action reliability,uncertainty model of shell transfer arm was built and modified by using the measured data to improve the simulation accuracy.RBF neural network was used as agent model to improve the simulation efficiency.The network outputs were compared with original data.The result shows that the RBF neural network is satisfactory for fitting purpose.Monte-Carlo simulation based on agent model was implemented.Probability distribution of positioning errors was obtained.The estimated action reliability of shell transfer arm is 92.48%.
关键词
弹药协调器 /
动作可靠性 /
径向基神经网络 /
代理模型 /
Monte-Carlo
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Key words
shell transfer arm /
action reliability /
RBF neural network /
agent model /
Monte-Carlo
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基金
国家自然科学基金项目(51175266/E050604)
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参考文献
[1] 侯保林,樵军谋,刘琮敏.火炮自动装填[M].北京:兵器工业出版社,2010.
HOU Bao-lin,QIAO Jun-mou,LIU Cong-min.Ammunition automatic loading system of howitzer[M].Beijing:Ordnance Industry Press,2010.(in Chinese)
[2]BHATTI P K.Probabilistic modeling and optimal design of robotic manipulators[D].West Lafayette,Indiana:Purdue University,1989.
[3]RAO S S,BHATTI P K.Probabilistic approach to manipulator kinematics and dynamics[J].Reliability Engineering and System Safety,2001,72:47-58.
[4]KIM J,SONG W J,KANG B S.Stochastic approach to kinematic reliability of open-loop mechanism with dimensional tolerance[J].Applied Mathematical Modelling,2010,34:1 225-1 237.
[5]冯广斌.远程火箭炮武器系统可靠性研究[D].南京:南京理工大学,2004.
FENG Guang-bin.Study on the weapon system reliability of a long range rocket gun[D].Nanjing:Nanjing University of Science and Technology,2004.(in Chinese)
[6]杨旭锋,刘永寿,何勇.飞机起落架收放机构功能可靠性与灵敏度分析[J].航空制造技术,2014,3:78-81.
YANG Xu-feng,LIU Yong-shou,HE Yong.Functional reliability and parameter sensitivity analysis for retraction-extension system of landing gear[J].Aeronautical Manufacturing Technology,2014,3:78-81.(in Chinese)
[7]同长虹.考虑原始误差与磨损的机构运动可靠性分析[D].兰州:兰州理工大学,2011.
TONG Chang-hong.Analysis of the motion reliability of mechanisms considering original manufacture errors and wear of the kinematic pairs[D].Lanzhou:Lanzhou University of Technology,2011.(in Chinese)
[8]纪玉杰.机构动作可靠性仿真技术研究[D].沈阳:东北大学,2006.
JI Yu-jie.Simulation research on mechanism action reliability[D].Shenyang:Northeastern University,2006.(in Chinese)
[9]HAYKIN S.Neural networks and learning machines[M].Upper Saddle River:Prentice Hall,2008.
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