Position control apparatus
AssigneeOkuma Corporation
InventorsTomohiro Shibata, Tomohisa Kameyama
Life of this patent
Estimating the term…
Abstract
A deflection amount Ps representing a difference between a position detection value Pl of a driven body and a position detection value Pm of a motor is detected. A position calculator proportional constant Kp, a time constant Tp of a first-order lag circuit that inputs a the deflection amount Ps, and a time constant Tv of a first-order lag circuit that inputs a difference between a speed detection value Vl of the driven body and a speed detection value Vm of the motor are changed based on the deflection amount Ps.
Claims4
A position control apparatus which performs full-close control for controlling a position of a driven body driven by a motor, the apparatus comprising:
- a motor position detector;
- a driven body position detector configured to detect the position of the driven body;
- a subtracter configured to calculate a deflection amount representing a difference between a position detection value obtained from the motor position detector and a position detection value obtained from the driven body position detector;
- and
- a deflection detector configured to change a proportional constant of a speed command calculator based on the deflection amount.
A position control apparatus which performs full-close control for controlling a position of a driven body driven by a motor, the apparatus comprising:
- a motor position detector;
- a driven body position detector configured to detect the position of the driven body;
- a subtracter configured to calculate a deflection amount representing a difference between a position detection value obtained from the motor position detector and a position detection value obtained from the driven body position detector;
- a position detection value calculator configured to add an output of a first-order lag circuit inputting the deflection amount to the position detection value obtained from the motor position detector and output a position feedback value;
- and
- a deflection detector configured to change a first-order lag circuit time constant of the position detection value calculator based on the deflection amount.
A position control apparatus which performs full-close control for controlling a position of a driven body driven by a motor, the apparatus comprising:
- a motor position detector;
- a driven body position detector configured to detect the position of the driven body;
- a subtracter configured to calculate a deflection amount representing a difference between a position detection value obtained from the motor position detector and a position detection value obtained from the driven body position detector;
- a speed detection value calculator configured to add an output of a first-order lag circuit to the motor speed detection value and output a speed feedback value, wherein the first-order lag circuit inputs a difference between a motor speed detection value obtained from a motor position detection value and a driven body speed detection value obtained from a driven body position detection value;
- and
- a deflection detector configured to change a first-order lag circuit time constant of the speed detection value calculator based on the deflection amount.
Dependencies are inferred from the claim text.