A positioning system includes an actuator, valve (preferably pneumatic), position sensor and an electronic valve controller, integrated in a single unit. Continuously variable setpoints are possible within the range of operation. A preferred control circuit includes a signal converter, a ramp genera
A positioning system includes an actuator, valve (preferably pneumatic), position sensor and an electronic valve controller, integrated in a single unit. Continuously variable setpoints are possible within the range of operation. A preferred control circuit includes a signal converter, a ramp generator to smooth the shape of the command or target value signal applied, a position feedback sensor to report the actual position of the actuator, a controller, and a driver, containing an H-bridge, for controlling the pneumatic valve which feeds air into the actuator mechanism. Integration of all these components into a single unit shortens signal paths, improves resistance to electrical noise, and permits faster response time.
대표청구항▼
What is claimed is: 1. An integrated electronically actuated fluid power actuator, comprising: a movable actuator portion (1); a stationary actuator portion (3) arranged adjacent said movable portion and adapted to receive (14, 15) a fluid for moving said movable portion (1) means for sensing a pos
What is claimed is: 1. An integrated electronically actuated fluid power actuator, comprising: a movable actuator portion (1); a stationary actuator portion (3) arranged adjacent said movable portion and adapted to receive (14, 15) a fluid for moving said movable portion (1) means for sensing a position of said movable portion (1) with respect to said stationary portion (3); a pneumatic fluid power valve (13) adapted to supply at least one fluid to said stationary actuator portion (3); a valve controller (6) containing means (50) for comparing a target position for said movable actuator portion with an actual position, as detected by said sensing means, means for generating a sequence of command signals to said fluid power valve, to thereby supply fluid through said valve (13) to said stationary actuator portion (3), to bring said movable actuator portion (1) to said target position, a signal converter (30), and a valve driver (60), wherein the valve driver includes an H-bridge circuit (71-74) and the valve includes a voice coil. 2. The integrated actuator of claim 1, further comprising a ramp generator (40), connected between said signal converter (30) and said means for comparing (50), to smooth abrupt signal changes. 3. An integrated electronically actuated fluid power actuator, comprising: a movable actuator portion (1); a stationary actuator portion (3) arranged adjacent said movable portion and adapted to receive (14, 15) a fluid for moving said movable portion (1); means for sensing a position of said movable portion (1) with respect to said stationary portion (3); a hydraulic fluid power valve (13) adapted to supply at least one fluid to said stationary actuator portion (3); a valve controller (6) containing means (50) for comparing a target position for said movable actuator portion with an actual position, as detected by said sensing means, means for generating a sequence of command signals to said fluid power valve, to thereby supply fluid through said valve (13) to said stationary actuator portion (3), to bring said movable actuator portion (1) to said target position, a signal converter (30), and a valve driver (60), wherein the valve driver includes an H-bridge circuit (71-74) and the valve includes a voice coil. 4. The integrated actuator of claim 3, further comprising a ramp generator (40), connected between said signal converter (30) and said means for comparing (50), to smooth abrupt signal changes.
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이 특허에 인용된 특허 (3)
Bolt David J. (West Alexandria OH) Bethke Richard J. (Centerville OH) Rediess David J. (Dayton OH), Apparatus and method for positioning a pneumatic actuator.
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