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JP3189967B2 |
PURPOSE: To enable abnormality to be informed to the outside as well as to enable an electropneumatic position to be safely operated in relation to abnormality of a valve opening detecting unit by switching the output of a pressure conve...
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JP3187072B2 |
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JP2001165102A |
To provide a small-sized electrohydraulic survomotor capable of controlling surely the spool position in the axial direction of a spool without being influenced by the temperature of a hydraulic oil.This electrohydraulic survomotor 100 f...
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JP2001153101A |
To provide a servo mechanism for shortening a control time and increasing positioning accuracy, etc.The respective control ports C1 and C2 of servo valves 11 and 21 are connected to the mold closing port 32 and the mold opening port 33 o...
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JP3172961B2 |
To easily perform maintenance of an electropneumatic converter. An opening part 16-2 is formed on a wall surface of an explosion-proof case 16, and an electropneumatic converter 3 is fixed to the inside of an explosion proof cover 16-3 t...
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JP3171473B2 |
PURPOSE: To provide smooth control switching without any hunting phenomenon by providing a closed loop system for flow rate control and a closed loop system for pressure control, and by inputting to an amplifier the smaller one out of ou...
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JP3165448B2 |
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JP2001124003A |
To provide a hydraulic drive servo system capable of realizing both of slow speed and highly accurate servo control for accurate machining and rapid feed control for reducing cycle time. A movable cylinder 10-1 in a cylinder mechanism 10...
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JP2001123939A |
To substitute a step motor in a control mechanism of a variable displacement inclined shaft type hydraulic device with a proportional solenoid fluid valve operationally connected to a computer. A pivot member 14 for supporting a cylinder...
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JP2001117627A |
To easily and accurately measure and identify static characteristics or a system parameter by using various hydraulic pressure equipment elements as targets. An arithmetic operation along a block diagrams constituted on a BDSP 4 and a co...
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JP2001116144A |
To provide a bent axis type hydraulic unit of the oscillating yoke type. A unique ball joint for actuating the servo piston of a bent axis unit is provided. The ball joint includes an actuator rod having a spherical outer surface at one ...
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JP3162139B2 |
PURPOSE: To reduce the required number of hydraulic circuits and to prevent an actuator from its upsizing, by combining an electrically hydraulic air servo control device with a local pumping group. CONSTITUTION: A hydraulic actuator 1 c...
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JP2001107901A |
To provide a small electrohydraulic servo motor. An electrohydraulic servo motor 100 to rotate an output shaft 61 in accordance with a difference of revolution of an axis of ro rotation 41 and the output shaft 61 is furnished with displa...
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JP2001090704A |
To eliminate heating of a liquid transmitting drive force and drag. This driving gear, comprising a first servomotor 10a, first hydraulic pump 20a connected thereto, and an actuator 4 connected capable of communication therewith, is prov...
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JP3149031B2 |
PURPOSE: To improve efficiency of utilizing energy of a hydraulic control actuator for an aircraft. CONSTITUTION: An over center variable displacement oil hydraulic motor 1 is connected to a swivel rotary shaft of a control surface 26 to...
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JP2001503834A |
(57) The 1st air pressure type main feed valve and the 1st air pressure type main exhaust valve in which summary book invention is prepared in the 1st pressure pipe of a two air pressure type type drive and this drive, It is related with...
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JP2001065501A |
To drive a hydraulic motor by reducing a pressure loss caused by the restriction of a servo valve without wasting an operating horse power of a hydraulic pump. A hydraulic driving device which is provided with a servo valve 25 that drive...
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JP3146240B2 |
PURPOSE: To perform feedback control with high accuracy by correcting a measurement error in a flow sensor due to temperature change. CONSTITUTION: This device is provided with a flow control valve 2 which is installed in a working oil p...
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JP3141007B2 |
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JP3138028B2 |
PURPOSE: To perform feedback control with high accuracy by correcting a measurement error in a flow sensor due to temperature change. CONSTITUTION: This device is provided with a flow rate control valve 2 which is installed in a working ...
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JP2001050201A |
To prevent excessive force acting from an actuator to an equipment by performing a feedback control for an operating part based on positional information on the detected operating part and pressure information on pressure oil for operati...
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JP2001003902A |
To relax a trangent in switching to a mechanical back up mode and to ensure a predetermined actuator speed in the mechanical back up mode.A restriction means 40 which can restrict a switching speed of a directional control valve 33 is pr...
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JP2000337305A |
To avoid collision of a piston to its end of stroke.A hydraulic cylinder operation control device is arranged so that a movable element 105 is moved under control inside a hydraulic motor 110 and includes a lever device 125 to generate a...
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JP2000304148A |
To increase current distribution for an electric-pneumatic conversion module by providing a variable impedance circuit having low impedance in a DC area and having high impedance in a digital communication frequency band, the electric-pn...
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JP2000301067A |
To make it possible to embody the more excellent reproducibility of exciting waveforms by compensating the change in the dynamic characteristics of a hydraulic cylinder which is the exciting source of a hydraulic exciting machine. The hy...
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JP2000276205A |
To compensate stability so as not to make the maximal value of a gain great so much while improving quick responsiveness in control for the steering surface of an airplane or the like. Concerning the feedback controller provided with a c...
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JP2000250636A |
To provide a hydraulic system and its starting method which can minimize the shaking of a hydraulic actuator that is caused when the hydraulic system is started. A hydraulic system 10 includes a hydraulic unit 20, a hydraulic cylinder 40...
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JP3086395B2 |
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JP2000234978A |
To provide a differential-pressure detecting device which can be miniaturized easily and which is of high reliability and to provide a fluid-pressure actuator which uses the detecting device and which is of high reliability. In this diff...
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JP2000234601A |
To provide an electrical hydraulic servo actuator with redundancy suitable for fail safe. In a redundant control system, a logic crossing coupling is arranged between independent servo actuators 101A and 101B that have hydraulic actuator...
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JP3076743B2 |
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JP2000218453A |
To clamp one of members to be butted against each other while automatically centering the same with respect to the other of the member without changing a clamp force with the use of a simple structure. A pair of cylinders 4, 5 are oppose...
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JP2000213502A |
To provide a compact and highly reliable electrohydraulic servo motor having reduced shaft length despite the adoption of a spool valve. This electrohydraulic servo motor is provided with a first helical gear 44 connected with an output ...
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JP2000213501A |
To provide an electrohydraulic servo motor having compact structure by improving the arrangement of a spool valve. This electrohydraulic servo motor is provided with a main spool valve 54, which is arranged normal to an output shaft 34 a...
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JP2000213503A |
To provide a device capable of largely reducing spool fluctuation causing micro-vibration (background vibration) of a hydraulic actuator. A micro-vibration reducing device consists of a hydraulic pump 21, a supply pressure (electric) fee...
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JP2000205202A |
To provide an electro-hydraulic servo motor having a compact structure by devising the arrangement of a control valve. This servomotor comprises a first helical gear 49 connected to an output shaft 34, second helical gears 52, 53 screw c...
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JP2000199242A |
To allow a lockout state to be an overriding state by a control unit temporarily by making a lockout state in response to the signal of a sensor for detecting and indicating an operation state, and also making the lockout state into an o...
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JP2605420Y2 |
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JP2000194420A |
To provide a directly driving type electro-hydraulic servo valve with high controllability and also a servo controlling system which is excellent in controllability, has high reliability and is inexpensive. This system is provided with a...
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JP2000192901A |
To provide a hydraulic servo actuator system being high in reliability and capable of expecting a sufficient force fight compensating effect without entailing any drop in output resolution. This system servo controls two hydraulic actuat...
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JP2000186348A |
To provide a hydraulic controller for a working 4 vehicle capable of improving the working efficiency by enhancing the excavation capacity even though the excavated soil is hard and of improving the wear resistance of tire. This controll...
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JP2000170704A |
To increase stability by providing an error exclusion section adding or averaging and feeding-back the differential pressure between hydraulic actuators with their output rods constrainedly operated together.Stationary cylinders 6a, 6b g...
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JP3044189B2 |
PURPOSE: To suppress excessive acceleration of a tilling apparatus and to perform smooth control of lifting motion. CONSTITUTION: This lift controlling apparatus is provided with a positional deviation detection means A to get the deviat...
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JP2000120603A |
To provide an intelligent hydraulic actuator, in which control facilities are distributed around devices to be controlled, the processing performance of the system can be improved, and both reliability and flexibility can be enhanced, by...
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JP2000110802A |
To control the position of a cylinder at high stopping accuracy only by an air source in a place having no hydraulic source and to be used under a high-temperature atmosphere by constituting a drive source of a cylinder of a pneumatic dr...
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JP3028943B2 |
To provide an automatic tracking system provided with an infrared wide angle sensor for improving the influence of noise generated by the separation from a device main body of a point to be measured capable of omitting work for initial c...
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JP2000087907A |
To stably control an extrusion rate with high accuracy by determining a control gain in a control system for adjusting a delivery of a hydraulic pump based on a mathematical model expression, using the mathematical model expression repre...
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JP3026173B2 |
To provide a driving control device which can sufficiently restrain oscillation characteristic in a resonance system and can stably work a mold oscillation device in a desired operation waveform. In a control device 60 according to a com...
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JP3026174B2 |
To stably work an oscillation device by restraining the oscillation characteristic. A control device 30 contains a driving waveform generating means 34 for generating a command value of spool position and the command speed of the spool f...
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JP2000081003A |
To facilitate control of the vibration amplitude and the advance/retreat position of a single rod type cylinder. This control device comprises a hydraulic pump 15 connected to an oil pressure chamber 12 on the rod side, a first solenoid ...
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