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US 12,486,923 B2Granted
Spool position estimation apparatus, aircraft hydraulic actuator apparatus, spool position estimation method, and spool position estimation program
AssigneeNabtesco Corporation
InventorTsutomu Yasui
Life of this patent
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Abstract
A position estimation apparatus includes: a supplying unit that supplies a high-frequency signal Sh to a solenoid for driving a spool of an electromagnetic valve; an acquisition unit that acquires electrical information Je related to the solenoid supplied with the high-frequency signal Sh, and an estimation unit that estimates a position of the spool based on a result of comparison between the electrical information Je acquired by the acquisition unit and the high-frequency signal Sh supplied from the supplying unit.
Claims8
A spool position estimation apparatus characterized by comprising:
- a supplying unit that supplies a high-frequency signal to a solenoid for driving a spool of an electromagnetic valve;
- an acquisition unit that acquires an inverse electromotive force of the solenoid supplied with the high-frequency signal;
- an estimation unit that estimates a position of the spool based on a result of comparison between the inverse electromotive force acquired by the acquisition unit and the high-frequency signal directly supplied from the supplying unit;
- and
- a driving unit that outputs a first driving voltage on which the high-frequency signal is superimposed to produce a second driving voltage to drive the solenoid,
- wherein the solenoid includes a coil and a movable part which has a moving path along the coil,
- wherein the second driving voltage in which the high-frequency signal and the first driving voltage are superimposed is directly supplied to the coil of the solenoid, and
- wherein the inverse electromotive force of the coil of the solenoid is acquired by the acquisition unit.
5 more elements
An aircraft hydraulic actuator apparatus characterized by comprising:
- a hydraulic actuator for driving a driven body of an airplane;
- an electromagnetic valve for controlling the hydraulic actuator;
- a supplying unit that supplies a high-frequency signal to a solenoid for driving a spool of the electromagnetic valve;
- an acquisition unit that acquires an inverse electromotive force of the solenoid supplied with the high-frequency signal;
- an estimation unit that estimates a position of the spool based on a result of comparison between the inverse electromotive force acquired by the acquisition unit and the high-frequency signal directly supplied from the supplying unit;
- and
- a driving unit that outputs a first driving voltage on which the high-frequency signal is superimposed to produce a second driving voltage to drive the solenoid,
- wherein the solenoid includes a coil and a movable part which has a moving path along the coil,
- wherein the second driving voltage in which the high-frequency signal and the driving voltage are superimposed is directly supplied to the coil of the solenoid, and
- wherein the inverse electromotive force of the coil of the solenoid is acquired by the acquisition unit.
7 more elements
A spool position estimation method characterized by comprising:
- supplying a high-frequency signal to a solenoid for driving a spool of an electromagnetic valve;
- acquiring an inverse electromotive force of the solenoid supplied with the high-frequency signal;
- estimating a position of the spool based on a result of comparison between the inverse electromotive force acquired and the high-frequency signal supplied;
- and
- outputting a first driving voltage on which the high-frequency signal is superimposed to produce a second driving voltage to drive the solenoid,
- wherein the solenoid includes a coil and a movable part which the coil has a moving path along the coil,
- wherein the second driving voltage in which the high-frequency signal and the driving voltage are superimposed is directly supplied to the coil of the solenoid, and
- wherein the inverse electromotive force of the coil of the solenoid is acquired by the acquisition unit.
5 more elements
A non-transitory computer-readable medium storing program storing an instruction to:
- supply a high-frequency signal to a solenoid for driving a spool of an electromagnetic valve;
- acquire an inverse electromotive force of the solenoid supplied with the high-frequency signal;
- estimate a position of the spool based on a result of comparison between the inverse electromotive force acquired and the high-frequency signal supplied;
- and
- output a first driving voltage on which the high-frequency signal is superimposed to produce a second driving voltage to drive the solenoid
- wherein the solenoid includes a coil and a movable part which has a moving path along the coil,
- wherein the second driving voltage in which the high-frequency signal and the driving voltage are superimposed is directly supplied to the coil of the solenoid, and
- wherein the inverse electromotive force of the coil of the solenoid is acquired by the acquisition unit.
5 more elements
Dependencies are inferred from the claim text.