起落架地面滑行系统振动谱的分析与控制
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摘要
由于机场跑道路面不平度的影响,飞机滑跑过程中产生的随机振动会给飞机带来许多负面影响。飞机起落架地面滑行系统用于模拟飞机起飞着陆的滑跑过程,进而对起落架进行振动试验。液压激振系统输出期望振动信号给起落架装置,是地面滑行系统的重要组成部分之一。以傅里叶逆变换为基础,研究了把路面振动谱信号转化为时域激励信号的逆变换算法。为克服系统中的非线性因素,引入数字迭代算法对振动谱进行闭环控制,并判断收敛性,实现振动谱的复现。
Because of the influence of the runway roughness in the airport,the random vibration of the taxiing produces will bring many negative impacts to the airplane.Landing gear non-straight taxiing system is used to make the vibration test of landing gear,and then used for the vibration test to the landing gear.Hydraulic excitation system,as an important part of landing gear non-straight taxiing system,outputs target vibration signal for landing gear device.With Fourier inverter change as the foundation,the inverter conversion method to transform the pavement vibration spectrum signal into time-domain excitation signal has been studied.In order to realize a repetition of power spectrum,it introduced a closed-loop digital iterative algorithm to control vibration spectrum,and then judged the astringency of the algorithm.
Because of the influence of the runway roughness in the airport,the random vibration of the taxiing produces will bring many negative impacts to the airplane.Landing gear non-straight taxiing system is used to make the vibration test of landing gear,and then used for the vibration test to the landing gear.Hydraulic excitation system,as an important part of landing gear non-straight taxiing system,outputs target vibration signal for landing gear device.With Fourier inverter change as the foundation,the inverter conversion method to transform the pavement vibration spectrum signal into time-domain excitation signal has been studied.In order to realize a repetition of power spectrum,it introduced a closed-loop digital iterative algorithm to control vibration spectrum,and then judged the astringency of the algorithm.
引文
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[2]王占海.飞机起落架地面滑行试验系统设计[D].南京:南京航空航天大学航空宇航学院,2007.
[3]刘献栋,邓志党,高峰.基于逆变换的路面不平度仿真研究[J].中国公路学报,2005,18(1):122-126.
[4]SchiehlenW,Hu B.Spectral simulation and shock absorber identification[J].InternationalJournalofNon-LinearMechanics,2003(38):161-171.
[5]黄文虎,夏松波,刘瑞岩,等.设备故障诊断原理、技术及应用[M].北京:科学出版社,1996.
[6]邬惠乐,邱毓强.汽车拖拉机实验学[M].北京:机械工业出版社,1981.
[7]何艳.谱分析在测井解释中的应用研究[J].西南石油学院学报,2005.
[8]刘献栋,邓志党,高峰.公路路面不平度的数值模拟方法研究[J].北京航空航天大学学报,2003,29(9):843-846.
[9]关广丰,丛大成,韩俊伟,等.随机振动功率谱复现迭代算法的研究[J].地震工程与工程振动,2006,26(6):71-76.
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