For every process there must be final actuator that regulates the supply of energy or material to the process and changes the measurement signal.
对每一过程，均必须由最终的控制器来调节过程中能量或材料的供给量，并且改变测量值。
2
But the differences of material? Construction and work condition of actuator lead to difficulty of setting up a standard mathematic model to precisely formulate the dynamic non-linearity character.
但由于驱动器的材料、结构和工作条件各异，所以关于动态非线性的定量描述难以建立一个统一的数学模型。
3
The thermal-deformation of the magnetostrictive material will influence the output accuracy of the actuator seriously.