频率指标方法在带附加空气室空气弹簧振动控制中的应用

发布时间：2018-05-05 03:36

本文选题：空气弹簧 + 附加气室　；参考：《机械科学与技术》2016年09期

【摘要】：以Firestone公司生产的1T15M-2型膜式空气弹簧为基础,与容积为22 L的附加空气室和节流阀构成了带附加空气室空气弹簧减振系统。根据空气弹簧减振系统的加速度响应特性,设计了基于频率指标的振动控制程序。试验时向空气弹簧内部分别充入3种不同气压,采用激振频率为0.5 Hz~10 Hz的随机激振信号对减振系统激励。在每个采样周期内对簧上质量的加速度响应信号进行滤波和FFT变换,并提取出采样周期内激振能量最大对应的频率信号,根据频率的大小,执行器调节节流阀的开度,使空气弹簧减振系统分别工作在2个相对较优的加速度响应的某一个区域内。试验结果表明,在随机信号激励条件下,3种不同内压的空气弹簧系统最短经过约2 s可达到稳定响应状态,控制前后系统加速度响应的振幅相对最大加速度幅值减小了近50%。
[Abstract]:Based on the 1T15M-2 membrane air spring produced by Firestone company and the additional air chamber and throttle valve with a volume of 22 L, the air spring damping system with an additional air chamber is formed. The vibration control program based on the frequency index is designed according to the acceleration response characteristic of the air spring vibration damping system. A random excitation signal of 0.5 Hz~10 Hz excitation frequency is used to stimulate the vibration damping system, respectively. In each sampling period, the acceleration response signal of the spring mass is filtered and FFT transform, and the frequency signal of maximum excitation energy is extracted in the sampling period, and the actuator is adjusted according to the frequency. The opening of the throttle valve enables the air spring damping system to work in a certain area of 2 relatively superior acceleration responses. The experimental results show that, under the condition of random signal excitation, 3 different internal pressure air springs can reach a stable response state at a minimum of about 2 s, and the amplitude relative to the acceleration response of the system before and after control is relative. The maximum amplitude of acceleration is reduced by nearly 50%.

【作者单位】：南京农业大学江苏省智能化农业装备重点实验室;
【基金】：国家自然科学基金面上项目(51275249)资助
【分类号】：U463.334.2

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