摘要
本文以船筏减振双线性系统为分析对象，利用极大值原理，通过受约束的梯度法数值求得船筏减振双线性系统的最优半主动阻尼控制曲线。由于控制曲线的非线性特性很强，甚至存在不可导的问题，引入脉冲函数并进行理论推导，解决了不可导曲线无法求解的缺陷，从而适用于双线性建模的系统。本文最后还比较了新方法与被动阻尼系统，半主动天棚阻尼系统在随机和冲击信号激励下的减振效果。结果显示：船筏双线性系统最优半主动阻尼控制策略是本文所述五种控制策略中减振效果最好的，并且对冲击信号的减振效果明显好于对随机信号减振。
Abstract
Using the ship raft vibration reduction bilinear system as analysis object, this paper utilized the maximum principle, through the constrained gradient method, obtained optimal semi-active damping control curve. Due to the non-linear characteristics of controlling curve being very strong, problems which cannot derivation even existed, article introduced the pulse function and made theoretical deduction, solving the defects of the curve which cannot derivation cannot be solved, thereby which was applied to bilinear modeling system. Finally, paper compared the effect of vibration reduction about the new methods and passive damping, semi-active skyhook damping system in random and impact incentive signal. The results show: the ship raft bilinear systems optimal semi-active damping control strategy of the five strategies is the best, and the effects of impact signal vibration reduction is better than that of random signal.
关键词
阻尼 /
减振 /
半主动控制 /
双线性系统
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Key words
damping /
vibration reduction /
semi-active control /
bilinear system
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高新科;.
船筏减振双线性系统的最优半主动阻尼控制[J]. 振动与冲击, 2012, 31(20): 131-136
Gao Xin-ke;.
Optimal semi-active damping control of the ship raft vibration reduction bilinear system[J]. Journal of Vibration and Shock, 2012, 31(20): 131-136
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脚注
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