| 摘要 |
<P>PROBLEM TO BE SOLVED: To materialize a linear actuator capable of minimizing a driving current value required for posture control while suppressing a yawing angle within a predetermined value. <P>SOLUTION: The linear actuator has a structure in which a pair of linear motors each having a position detecting means are disposed in parallel with a predetermined distance and sliders of the linear motors are coupled with an arm member. The linear actuator is provided with a neutral point position detecting means for calculating a neutral point position signal between the sliders on the basis of the sum of the outputs of the pair of the position detecting means; a posture position detecting means for calculating a posture position signal between the sliders on the basis of the difference between the outputs of the pair of the position detecting means; a neutral point position control section for operating the driving current value for driving the sliders on the basis of a thrust command based on the deviation between the neutral point position signal and the position command signal; a posture target value generating section for generating an optimum posture target value signal in a controlled neutral position; and a posture control section for correcting the thrust command by utilizing a correction signal obtained by arithmetically operating the deviation between the posture position signal and the posture target value signal. <P>COPYRIGHT: (C)2009,JPO&INPIT |
