超磁致伸缩微位移执行器控制系统研究

Study of control system of giant magnetostrictive micro-displacement actuator

以单片机和上位PC微机为控制核心,设计并构建了利用超磁致伸缩棒开发的超磁致伸缩执行器的计算机闭环控制系统,完成了相应的软硬件设计.结合所开发的超磁致伸缩微位移执行器的结构建立了传递函数模型,针对微位移执行器控制系统进行了数字PID控制器设计,通过实验得出,在不降低其相对稳定性情况下数字控制系统的精度提高,为进一步提高超磁致伸缩执行器的精度、改善整个系统的动态特性奠定了基础.

The closed\|loop control system of actuator consisting of giant magnetostrictive rod is designed and established regarding SCM (single cell machine) and personal computer as the core. The software and hardware required are also debugged and accomplished. The transfer function model of giant magnetostrictive actuator is built according to its structure. The digital control system using digital PID controller decreases the error of stable state on micro-actuator system without degrading much of its relative stability. As mentioned above, this system can establish the foundation for further developing the high\|precision giant magnetostrictive micro-displacement actuator and improving the dynamic performance of its control system.