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一种新的气动伺服弹性失稳模式的机理分析

姜宇 杨超 吴志刚

姜宇, 杨超, 吴志刚等 . 一种新的气动伺服弹性失稳模式的机理分析[J]. 北京航空航天大学学报, 2022, 48(7): 1314-1323. doi: 10.13700/j.bh.1001-5965.2021.0571
引用本文: 姜宇, 杨超, 吴志刚等 . 一种新的气动伺服弹性失稳模式的机理分析[J]. 北京航空航天大学学报, 2022, 48(7): 1314-1323. doi: 10.13700/j.bh.1001-5965.2021.0571
JIANG Yu, YANG Chao, WU Zhiganget al. Mechanism analysis of a new aeroservoelastic instability mode[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(7): 1314-1323. doi: 10.13700/j.bh.1001-5965.2021.0571(in Chinese)
Citation: JIANG Yu, YANG Chao, WU Zhiganget al. Mechanism analysis of a new aeroservoelastic instability mode[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(7): 1314-1323. doi: 10.13700/j.bh.1001-5965.2021.0571(in Chinese)

一种新的气动伺服弹性失稳模式的机理分析

doi: 10.13700/j.bh.1001-5965.2021.0571
详细信息
    通讯作者:

    吴志刚, E-mail: wuzhigang@buaa.edu.cn

  • 中图分类号: V211.47

Mechanism analysis of a new aeroservoelastic instability mode

More Information
  • 摘要:

    某超声速导弹在飞行试验中发生了气动伺服弹性失稳导致的结构解体,通过对飞行试验数据的分析发现,气动伺服弹性失稳的振动频率高于弹体一阶弯曲模态频率,对导弹进行气动伺服弹性稳定性频域分析,并未发现该频率段发生气动伺服弹性失稳。针对该问题,建立了一种可以考虑数字式飞控系统采样过程影响的气动伺服弹性稳定性仿真分析方法,并对该导弹进行了建模分析,数值结果复现了该导弹的失稳现象。讨论了这一新型失稳现象发生的原因,包括连续结构滤波器离散化带来的移频现象和频率混叠问题。给出了对应的改进措施和相关的结论。

     

  • 图 1  弹性飞行器ASE系统框图

    Figure 1.  Block diagram of flexible flight vehicle aeroservoelasticity system

    图 2  飞控系统框图

    Figure 2.  Block diagram of flight control system

    图 3  有无滤波器导弹的开环传递函数曲线

    Figure 3.  Open-loop transfer function curves of missile with and without filter

    图 4  有数字式飞控系统的飞行器ASE系统开环Simulink模型

    Figure 4.  Simulink model of aircraft ASE open-loop system with digital flight control system

    图 5  有数字式飞控系统的飞行器ASE系统闭环Simulink模型

    Figure 5.  Simulink model of aircraft ASE close-loop system with digital flight control system

    图 6  无滤波器开环仿真结果(采样率400 Hz)

    Figure 6.  Open-loop simulation results without filter (sampling rate 400 Hz)

    图 7  无滤波器开环传递函数曲线(采样率400 Hz)

    Figure 7.  Open-loop transfer function curves without filter (sampling rate 400 Hz)

    图 8  有滤波器开环仿真结果(采样率400 Hz)

    Figure 8.  Open-loop simulation results with filter (sampling rate 400 Hz)

    图 9  有滤波器开环传递函数曲线(采样率400 Hz)

    Figure 9.  Open-loop transfer function curves with filter (sampling rate 400 Hz)

    图 10  有滤波器开环仿真结果(采样率200 Hz)

    Figure 10.  Open-loop simulation results with filter (sampling rate 200 Hz)

    图 11  有滤波器开环传递函数曲线(采样率200 Hz)

    Figure 11.  Open-loop transfer function curves with filter (sampling rate 200 Hz)

    图 12  系统闭环时域响应(采样率200 Hz)

    Figure 12.  Closed-loop time domain response of system (sampling rate 200 Hz)

    图 13  不同采样率离散化的结构滤波器频响曲线

    Figure 13.  Frequency response curves of discrete structured filters with different sampling rates

    图 14  系统辨识开环传递函数曲线(采样率200 Hz)

    Figure 14.  Open-loop transfer function curves for system identification(sampling rate 200 Hz)

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出版历程
  • 收稿日期:  2021-09-26
  • 录用日期:  2021-12-19
  • 刊出日期:  2022-01-05

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