Position control method
AssigneeToshiba Machine Co., Ltd.
InventorHiroshi Itoh
Life of this patent
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Abstract
A position control method for controlling a position of an object on a machine tool such as a lathe having a plurality of axes. The control on one of the axes is conducted in accordance with a control input signal which is generated in response to a position command signal and a state variable for each axis so as to optimize an evaluation function J, wherein the control input signal U.sub.i is generated so as to optimize the evaluation function in such a manner as to reduce path error by taking into account not only the position command signal and the state variable concerning this axes but also the position command signal and the state variable concerning another axis.
Claims7
A position control method for controlling a position simultaneously along a plurality of i axes, comprising the steps of
- controlling said position on an i.sup.th axis in accordance with a control input signal U.sub.i which is generated in response to a position command signal R.sub.i and a state variable X.sub.i for each axis produced on the basis of a position command signal in such a manner as to optimize an evaluation function J;
- and
- generating said control input signal U.sub.i so as to optimize said evaluation function J in such a manner as to reduce a path error by taking into account both the position command signal R.sub.i and the state variable X.sub.i for said i.sup.th axis and also a position command signal R .sub.k and the state variable X.sub.j for another axis j.
Dependencies are inferred from the claim text.