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 3 充油状态水下电液作动器固有频率与阻尼比

Tab.3 Natural frequencies and damping ratios of oil-filled underwater electro-hydraulic actuator

n f/Hz ζ 1 181.73 0.045 2 247.86 0.016 3 675.98 0.109 4 1 031.18 0.117 5 1 347.08 0.035 6 1 746.76 0.043 7 2 311.00 0.053 8 2 492.69 0.038 9 2 645.90 0.021 10 2 887.98 0.021 11 3 135.46 0.034 12 3 491.17 0.021 13 3 778.52 0.023 14 3 952.41 0.036 15 4 323.86 0.043 16 4 606.81 0.031 17 4 832.92 0.028