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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。
Due to the unevenness of the airport runway, the random vibration generated during the aircraft flight will bring many negative impacts to the aircraft. Aircraft landing gear The ground taxiing system is used to simulate the landing process of the aircraft landing, and then the landing gear vibration test. The hydraulic vibration excitation system outputs the desired vibration signal to the landing gear device, which is one of the important components of the ground taxi system. Based on the inverse Fourier transform, the inverse transform algorithm is proposed to transform the vibration signal of the road surface into the excitation signal of the time domain. In order to overcome the non-linear factors in the system, a digital iterative algorithm is introduced to control the vibration spectrum in a closed-loop manner, and the convergence is judged and the recurrence of vibration spectrum is realized.