摘要
小阻尼单模态振动机构的动力学特性表现为长时间减幅振动特性,如果仅仅采用小冲击的输入信号来抑制系统的振动,就可能降低系统的响应速度。为了有效解决这一问题,将时滞环节引入控制系统中,提出PD结合输入整形控制策略,研究在S型曲线输入信号作用下PD结合输入整形控制系统的振动特性,定量分析输入整形对单模态振动机构振动幅值的作用规律。在相同反馈增益的情况下与PD反馈控制相比较,PD结合输入整形控制系统的响应无超调,而且输入整形在半个振动周期内消除单模态振动机构的残留振动,从而减小了系统的稳定时间,提高了系统的响应速度。
Abstract
A containing a single-mode mechanical structures with slight damping behaves as a system the dynamical performance of long period damped vibration. Reference inputs with lower impact, usually added to restrain the vibration, may lead to slowly response. To solve the problem, a time-delay sector was introduced in the control system.The strategy of PD combined with input-shaping control was presented and the dynamical behavior of the control system, subjected to S-curve inputs, was investigated. The effect of input shaping on vibration magnitude was quantitatively analyzed. As compared with the conventional PD feedback control under the same condition of feedback gains, PD combined with input shaping control produces no peak percent overshoot, eliminates effectively the residual vibration of the vibraton mechanisms in half one vibratory period and speeds system responses.
关键词
单模态 /
弹性机构 /
输入整形 /
主动控制 /
振动
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Key words
single mode /
flexible mechanical structure /
input shaping /
active control /
vibration
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董明晓;张明勤;张瑞军;脱建智.
单模态振动机构输入整形振动主动控制研究[J]. 振动与冲击, 2010, 29(8): 40-42
DONG Ming-xiao;ZHANG Ming-qin;ZHANG Rui-jun;TUO Jian-zhi.
RESEARCH ON ACTIVE VIBRATION CONTROL FOR SINGLE-MODE VIBRATION MECHANISMS
[J]. Journal of Vibration and Shock, 2010, 29(8): 40-42
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脚注
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