交流伺服电动缸在地震模拟振动台中的应用
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摘要
交流伺服电动缸凭借其优异的控制性和相对较低的成本,特别是其核心部件——交流伺服电机的控制精度高、加速性能好、有良好的矩频特性和过载能力,使得利用电动缸进行地震模拟成为可能。交流伺服电动缸振动台成本低、控制简单,在地震教学演示、构件及小型结构振动台实验中优点突出,具有广泛的应用前景。将伺服电动缸和微机控制技术相结合,实现了一条单向地震波的模拟仿真输出。结果表明,在一定的加速度范围内模拟效果良好,模拟极限加速度值和模拟效果取决于交流伺服电动缸的性能和台面载荷。
AC servo motor cylinder becomes an alternative product of hydraulic servo because of its excellent controllability and low maintenance costs.The AC servo motor has many fine qualities such as high regulating accuracy,good acceleration,torque-frequency characteristic and overload capacity,which make it capable of simulating earthquake vibration.The future of that vibration platform is bright for teaching and demonstration of earthquake and vibration test of the structural member or small structure because operating is easy and the cost is low.Simulation of a horizontal unidirectional earthquake wave is completed by means of combining AC servo motor cylinder with control technique of microcomputer.Results show that the fidelity depends on the capability of electric cylinder and applied load of the system.
AC servo motor cylinder becomes an alternative product of hydraulic servo because of its excellent controllability and low maintenance costs.The AC servo motor has many fine qualities such as high regulating accuracy,good acceleration,torque-frequency characteristic and overload capacity,which make it capable of simulating earthquake vibration.The future of that vibration platform is bright for teaching and demonstration of earthquake and vibration test of the structural member or small structure because operating is easy and the cost is low.Simulation of a horizontal unidirectional earthquake wave is completed by means of combining AC servo motor cylinder with control technique of microcomputer.Results show that the fidelity depends on the capability of electric cylinder and applied load of the system.
引文
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[3]龚仲华.交流伺服驱动从原理到完全应用[M].北京:人民邮电出版社,2010.
[4]张宏,李富平.基于PC+运动控制卡的开放式数控系统的研究[J].机械设计与制造,2008(6):171-172.
[5]关键,舒志兵.基于PCI总线的全闭环交流伺服控制系统[J].机床与液压,2008,36(7):283-285.
[6]王燕华,陈文瀼.地震模拟振动台运动控制性能分析[J].振动与冲击,2010,29(2):99-106.
[7]田永波,电液伺服地震模拟振动台的数字控制[D].武汉:武汉理工大学,2004.
[8]刘金琨,先进PID控制及其MATLAB仿真[M].北京:电子工业出版社,2003.
[9]曹承志.微型计算机控制新技术[M].北京:机械工业出版社,2001.
[10]王济,胡晓.MATLAB在振动信号处理中的应用[M].北京:中国水利水电出版社,2006.
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