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JP3468963B2 |
To highly precisely position a work without being affected by the fluctuation of weight and the like by displacing a piston to a target position in a state where balance pressure is held under the operation of a rotary driving source so ...
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JP2003329003A |
To give a damping action on each joint of a robot and accomplish simultaneously lightweight and high power output of the robot having a tendency being large in scale.A gas pressure type actuator operates a movable portion 1 by opening an...
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JP2003308101A |
To allow a user to be released from analyzing data, and to easily judge which parameter should be considered although there are a lot of evaluation parameters.An off-line diagnostic system is provided with a self- characteristic measurin...
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JP2003285797A |
To provide a method and a device for driving power steering for a ship to suppress an engine output loss by steering a ship with a necessary and sufficient hydraulic drive force by a hydraulic cylinder, highly efficiently driving the hyd...
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JP2003278703A |
To eliminate the need for using a ball screw and a ball nut and to inexpensively configure an electro-hydraulic servo cylinder in the electro- hydraulic servo cylinder having a valve structure for switching an oil channel inside a piston...
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JP3447481B2 |
To reduce the number of workers and transceivers in the case of performing a loop check. A liquid crystal display part 7G is provided in an electropneumatic positioner 7. A flow value Qpv from a flow meter 4 is fed to the electropneumati...
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JP3447487B2 |
To provide a compound type hydraulic actuator suited for intake/ exhaust valve open/close timing control of an internal combustion engine having sufficient drive force, good responsiveness and a wide control range. An actuator comprises ...
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JP2003524763A |
A loading assembly for applying a load to a test specimen includes a container having a volume of compressible fluid for providing a spring. A cylinder having a bore operably connected to the container. A piston is slidable in the bore a...
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JP3437603B2 |
PURPOSE: To accurately locate a rod controlling the real moving position of the rod by a motor position command signal designated to decrease a difference value between the position command signal for indicating a specified position to l...
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JP2003194003A |
To provide a servo motor for keeping a difference between the rotating speed of a fluid motor and a rotating speed instructed by an input signal smaller than conventional, even when torque generated by a fluid motor is smaller than loadi...
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JP2003194013A |
To improve the controllability of a spool for a switching control valve and improve the responsiveness of a spool to a pull allowance signal for a speed lever for a remote operator by reducing the poor influences of a dither signal.This ...
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JP2003167604A |
To accurately estimate disturbance by accurately identifying the control parameter of a control system.A position control signal u is inputted to a real controlled object 10, and hydraulic equipment (a valve 12) is operated, and position...
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JP2003167629A |
To provide a simple and inexpensive position controller capable of executing positioning with high position precision.The stroke of a piston rod 12 of a cylinder 10 in which a A chamber and B chamber on the both ends of a piston 11 commu...
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JP2003156003A |
To provide a control device for a hydraulic machine for improving a tracking performance and stability of control.The control device 1 of the hydraulic device comprises a means 6 for preparing a desired value to be controlled of a contro...
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JP2003148404A |
To release surplus hydraulic oil generated in stopping the drive without excess energy.This electro-hydraulic motor is provided with a spool valve 110 for switching between a driving position 111, 112 connecting a main oil passage 230 an...
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JP2003148402A |
To realize a hydraulic control system capable of performing feedback control based upon a detected value related to hydraulic drive in a stable state.This hydraulic control system includes a liquid pressure circuit for controlling the hy...
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JP2003139101A |
To provide a servo cylinder reducing total length as compared with conventional one.An electrohydraulic servo cylinder 100 is provided with: an electric motor 110 rotating a driving shaft 111; a cylinder 121; a piston 122; a driving part...
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JP3406095B2 |
PURPOSE: To provide the fluid pressure cylinder which can switch an oil pressure source to high/low pressure so as to reduce the energy consumption, and spontaneously performs these switches according to a load so that a control system c...
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JP2003113801A |
To apply a mechanical feedback control and to return a spool valve to a neutral position when a machine or the like is stopped, in a cylinder with an electric servo.The spool valve 4 is provided at the bottom 14 of a hydraulic cylinder 1...
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JP3391655B2 |
To perform zero and span adjustment easily and in a short time without requiring operating of a valve stem by air supply and without requiring any measuring instrument. A valve opening setting mechanism 50 is established in a feedback me...
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JP2003074504A |
To make it possible to control operating speed of a hydraulic pressure actuator and enlarge a design choice for control of the operating speed.An actuator operating unit comprises a hydraulic pressure- generating unit 14 generating hydra...
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JP2003509628A |
A method and device for the transmission of control and/or sensor signals between an electronic control and/or data receiving means and a pneumatic device, which are connected together by means of a pneumatic line of flexible plastic mat...
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JP3383968B2 |
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JP2003065301A |
To enable change of the operational characteristics of a hydraulic actuator according to an operator's desire as to a hydraulic controller of a construction equipment.A desired speed table 4 memorizing the desired action speed of a hydra...
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JP2003048599A |
To ensure a reliable operation of a trim control system for a fully hydraulic horizontal stabilizer in a fixed wing type aircraft. The control system uses hydraulic power only in controlling a trim control surface 8 of the horizontal sta...
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JP3374976B2 |
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JP2003010916A |
To provide an automatic control device for a multi-directional bending machine capable of performing by a hydraulic servo cylinder all the sliding transfers of a plurality of pressing slide dies including wire material feeding and materi...
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JP3367252B2 |
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JP2002370893A |
To easily perform operation by reducing operation force of an operation lever. A crane is provided with a hydraulic actuator 16, and a directional control valve 20 of the hydraulic actuator operated by the operation lever 18. The directi...
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JP2002364516A |
To provide a variable blade device of a windmill for preventing a secondary trouble. In this variable blade device of the windmill having a blade 1 for rotating a rotor by wind force and a hydraulic actuator 3 for varying the pitch angle...
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JP2002361308A |
To provide a hydraulic drafting device of a rolling mill capable of overcoming instability with the influence of mutual cylinders since the rod side pressure room of each cylinder communicates with each other in the hydraulic drafting de...
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JP2002357201A |
To reduce load of a compressed fluid equipment by effectively using supplied compressed fluid in self-weight compensation by means of a fluid cylinder used for a positioning system and the like moving toward a gravity direction. A contro...
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JP2002349507A |
To provide an actuator position sensor connected to a hydraulic circuit for sensing the position of an actuator by sensing the flow of a working oil supplied to the actuator. The actuator position sensor 9 is equipped with an oil passage...
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JP3344916B2 |
To quickly move an actuator and stop it to a target value by automatically correcting the deviation of the return position, to be generated on a control valve mechanism caused by the ambient temperature and the manufacturing error. In a ...
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JP2002316300A |
To provide a method of controlling a hydraulic cylinder which is capable of improving productivity by generating a high pressure in spite of a fluctuation in load and the method of controlling the hydraulic cylinder in a press brake.A di...
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JP2002313144A |
To provide a servo-motor system which realizes curtailment of wiring man-hours and lowering of cost by simplifying connection structure between a servo-driver and a servo-motor.Three encoder signal lines 101, 102, 103 each sending encode...
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JP3335568B2 |
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JP2002276535A |
To provide a variable vane mechanism capable of reducing rotating resistance.A servo actuator 10 is composed of a hydraulic cylinder 11 capable of changing the pitch angle of a blade 2, a two-way pump 30 connecting both discharging port ...
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JP2002266803A |
To realize a structure capable of preventing the reaction force of the load from an output shaft side, from being transmitted to an input shaft side by a single torque generator.In this torque generator TG1 comprising an input shaft 110 ...
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JP3320907B2 |
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JP2002525515A |
A control system for controlling position of an object includes an integrated actuation package utilizing an electric motor driven servopump (3) to control actuator (4) position. The electric motor (2) operates at a constant direction an...
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JP2002522231A |
A device for hydraulic adjustment of rollers of strand guiding segments of a strand casting device has hydraulic cylinders which are separated by a piston with piston rod into a cylinder chamber and an annular cylinder chamber, respectiv...
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JP3294383B2 |
PURPOSE: To secure the closing performance of a control valve, etc., by the mechanical and structural improvement of a positioner and with no dependence on the adjustment of the positioner span. CONSTITUTION: The opening degree of a cont...
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JP2002149204A |
To provide such a control device that the correspondence relation among parameters to be adjusted for multiple control specifications can be easily recognized and the response waveform of a controlled system can be easily and visually ad...
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JP2002147405A |
To provide a hydraulic driver controlling speed driven by a hydraulic actuator so as to fluctuate it in accordance with fluctuation of load force acting on the hydraulic actuator and providing an optimal speed control to the fluctuation ...
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JP2002130202A |
To supervise the malfunctions of a servo valve, in a servo valve control that gives command for the spool travel of the servo valve by performing a proportional control and an integral control with the input of a deviation between a cont...
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JP3274219B2 |
PURPOSE: To miniaturize an auxiliary force generating source by way of eliminating a centering spring by furnishing a locking piston to hold the other end side of a summing lever at a specified position at the time when no auxiliary forc...
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JP2002106506A |
To make a communication valve compact and facilitate structure for an apparatus of communication and releasing from the communication by reducing the number of ports in the communication valve.An inflow port of pressured fluid in either ...
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JP2002106508A |
To widen space in an operating compartment and to facilitate constitution of a hydraulic circuit by making it possible to exhaust pilot pressured oil of high pressure without employing a shuttle valve and a pressure sensor.A flow directi...
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JP3273109B2 |
PURPOSE: To provide a method for carrying out feed back control so as not to cause control error by change in temperature when lifting and lowering control of reaping pretreating apparatus in a general purpose combine is carried out by p...
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