论文部分内容阅读
分析了以压电陶瓷片为作动和测量元件，构成速度负反馈的闭环控制的“电子阻尼技术”之所以不能大幅度增加结构阻尼的原因。提出了“局部激励应变补偿”和把通常的微分负反馈改为低截止频率的惯性环节正反馈的控制新方案。压电悬臂梁的实验表明，它们能使结构模态阻尼比大幅提高。
The reason why the “Electronic Damping Technology”, which uses the piezoelectric ceramic as the actuating and measuring element and the closed-loop control which constitutes the negative feedback of the speed, can not greatly increase the structural damping is analyzed. A new control scheme of inertia feedback with “local excitation strain compensation” and common differential negative feedback to low cutoff frequency is put forward. Piezoelectric cantilever experiments show that they can significantly increase the structural modal damping ratio.