US 7,319,909 B2 · Position control device, measuring device and machining device

Abstract

In a quadruple loop position control device (1) including: a drive controller (5) having a current control loop that controls motor current (I) and a motor speed control loop that controls a motor speed (Vm); a speed control loop (3) that controls a speed (Vd) of a driven body (2); and a position control loop (4) that controls a position (Pd) of the driven body (2), an adder (6) that adds an output value from the position control loop (4) and an output value from the speed control loop (3) and inputs an addition result to the motor speed control loop is provided. By providing the adder (6), the position control device (1) functions as a control device of a first-order system, so that occurrence of an overshoot may securely be avoided even when respective transfer functions of the position control device (1) are set for purpose of suppressing a vibrating behavior of the driven body (2).

Claims15

Dependent claims

A position control device that controls a position of a driven body driven by a driver according to a predetermined position command, comprising:

a position control loop including a position comparator that compares a current position of the driven body with the position command, and a position characteristic compensator that performs position characteristic compensation of the driven body based on a comparison result of the position comparator;
a speed control loop including a speed comparator that compares a current speed of the driven body with an output value from the position characteristic compensator as a speed command, and a speed characteristic compensator that performs speed characteristic compensation of the driven body based on a comparison result of the speed comparator;
an adder that adds the output value from the position characteristic compensator and an output value from the speed characteristic compensator;
and
a drive controller that operates the driver to drive the driven body based on an addition result of the adder.

2 more elements

A measuring device, comprising:

a position control device that controls a position of a driven body driven by a driver according to a predetermined position command, wherein
the position control device includes:
a position control loop including a position comparator that compares a current position of the driven body with the position command, and a position characteristic compensator that performs position characteristic compensation of the driven body based on a comparison result of the position comparator;
a speed control loop including a speed comparator that compares a current speed of the driven body with an output value from the position characteristic compensator as a speed command, and a speed characteristic compensator that performs speed characteristic compensation of the driven body based on a comparison result of the speed comparator;
an adder that adds the output value from the position characteristic compensator and an output value from the speed characteristic compensator;
and
a drive controller that operates the driver to drive the driven body based on an addition result of the adder, and
the driven body is a probe relating to measurement of a workpiece.

5 more elements

A machining device, comprising:

a position control device that controls a position of a driven body driven by a driver according to a predetermined position command, wherein
the position control device includes:
a position control loop including a position comparator that compares a current position of the driven body with the position command, and a position characteristic compensator that performs position characteristic compensation of the driven body based on a comparison result of the position comparator;
a speed control loop including a speed comparator that compares a current speed of the driven body with an output value from the position characteristic compensator as a speed command, and a speed characteristic compensator that performs speed characteristic compensation of the driven body based on a comparison result of the speed comparator;
an adder that adds the output value from the position characteristic compensator and an output value from the speed characteristic compensator;
and
a drive controller that operates the driver to drive the driven body based on an addition result of the adder, and
the driven body is a tool relating to machining of a workpiece.

5 more elements

Dependencies are inferred from the claim text.

Position control device, measuring device and machining device

Life of this patent

Position control device, measuring device and machining device

Life of this patent

Abstract

Claims15