摘要
针对压电机敏柔性结构振动主动控制研究,以PA95功放芯片为核心,设计与开发了一种适合驱动压电陶瓷作动器的新型高压功率放大器;阐述了压电功率放大器的设计方案,通过对PA95放大器芯片工作原理和特性指标的介绍,分析了符合容性负载特殊要求的压电功率放大器设计方法和实现关键技术,以及功率放大器的幅频/相频特性和主要特性功能;实验表明设计开发效果良好,在5 kHz频率范围内有效实现±5 V信号到±350 V的动态放大,最大稳态输出电流120 mA。
For research of intelligent flexible structure＇s active vibration control based on piezoelectric element, a new high-voltage power amplifier suitable to driving piezoelectric actuators is designed with a core of power amplif- ying chip PA95. By introduction of chip＇s principle and characteristics, the power amplifier＇s design proposal and some key techniques meeting the requirements of capacitive loads are analyzed, and the power amplifier＇s amplitude frequency and phase frequency characteristics are worked out. Experimental testing gains good efforts, and shows the power amplifier can amplify signal＇s voltage amplitude from ±5 V to ±350 V in frequency range of 5 kHz while the maximum steady output current is 120 mA.
出处
《压电与声光》
CSCD
北大核心
2008年第5期561-563,567,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金重大研究计划资助项目(90405013)
上海市教委"曙光计划"资助项目(04SG41)
上海市重点学科建设资助项目(T0103)
上海市电站自动化技术重点实验室资助项目
关键词
PA95芯片
功率放大器
压电驱动
反馈补偿
振动主动控制
PA95 chip
power amplifier
piezoelectric＇driving
feedback compensation
active vibration control
