基于子空间频域加权与参数优化的水下电液作动器模态识别

苏伟鸿,陈嘉骏,刘子皓,帅永齐,刘佳佳,聂勇,梅德庆,陈正

Modal identification for underwater electro-hydraulic actuators based on subspace frequency-domain weighting and parameter optimization

Weihong SU,Jiajun CHEN,Zihao LIU,Yongqi SHUAI,Jiajia LIU,Yong NIE,Deqing MEI,Zheng CHEN

表 4 无油状态水下电液作动器固有频率与阻尼比

Tab.4 Natural frequencies and damping ratios of oil-free underwater electro-hydraulic actuator

n f/Hz ζ 1 314.16 0.032 2 1 027.58 0.067 3 1 246.54 0.171 4 1 754.14 0.030 5 2 042.09 0.084 6 2 270.23 0.024 7 2 533.34 0.010 8 2 848.99 0.018 9 2 975.46 0.016 10 3 241.02 0.024 11 3 395.83 0.019 12 3 592.87 0.004 13 3 674.01 0.043 14 3 880.56 0.020 15 4 105.90 0.019 16 4 202.28 0.016 17 4 427.39 0.026 18 4 566.58 0.012 19 4 715.25 0.008 20 4 967.35 0.012