摘要
基于力作动器的传统主动隔振理论已得到广泛研究和较多应用,但要求较高的作动器功率,因此限制了较小功率的压电元件在主动隔振上的应用。将压电元件粘贴于一定形状的弹性元件上,构造成主动弹性隔振器件,使其具有传统被动弹性隔振器与主动隔振器两者的优点。通过综合考虑隔振系统的性能指标与主动弹性隔振器的自身能力,建立主动弹性隔振系统的理论模型,推导并分析反馈控制、前馈控制在主动弹性隔振系统中的应用框架。试验研究基于压电元件的Z形主动弹性隔振系统,通过采用粘贴其上的压电元件作为隔振器的作动器与检测隔振器内部性能的传感元件,用加速度信号作为隔振系统性能指标信号,分别采用前馈与反馈控制算法有效地实现了振动源的隔离。
The theory and practice oftraditional active vibration isolation based on force actuator have been studied widely, but the capacity of force actuator limits the use of piezoelectric element in the active vibration isolation. The active-flexible-isolation system which is coustructed by piezoelectric elements bonded on an elastic element with certain shape has the advantages of both passive isolation element and active isolation. The model of the active-flexible-isolation system is established based on the index of isolation system and the self-ability of active-flexible-isolation. The application framework of feedforward control and feedback control in the active-flexible-isolation is analyzed. The Z shape active-flexible-isolation system which adopts piezoelectric elements bonded on the flexible element as actuators and sensors to detect the capacity of the isolation system and uses acceleration signal as the index of isolation system has been experimented. The experimental results show vibration can be suppressed by feedforward control and feedback control.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2008年第11期283-289,共7页
Journal of Mechanical Engineering
基金
江西省自然科学基金资助项目(2007GQC0863)
关键词
主动弹性隔振系统
压电元件
主动隔振
前馈算法
反馈算法
Active-flexible-isolation system Piezoelectric elements Active vibration isolation Feedforward controlFeedback control
