FLUID PRESSURE DRIVE CONTROL SYSTEM, CONTROL METHOD OF FLUID PRESSURE DRIVE DEVICE

• Main Authors: NAKAMURA TETSUJI, SHIMIZU JURI, ASHLIH DAMEITRY, ONO SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 30.09.2021
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

To provide a fluid pressure drive control system which has capacity of holding a working pressure for a long time, and which can stably control a fluid pressure with high accuracy, and to provide a control method of the fluid pressure drive device.SOLUTION: A fluid pressure drive control system includes: a cylinder 3 for, by adjusting a piston position, controlling a fluid pressure of the system; an encoder 46 for detecting the piston position of the cylinder 3; a pressure sensor 5 for measuring a pressure state of the system; and a controller. The controller determines a stroke end condition of the cylinder 3 by detecting whether a piston 433 has exceeded a predetermined threshold value, based on the detection value of the encoder 46 and the pressure sensor 5, and in the case where it is detected that the piston 433 has exceeded the predetermined threshold value, a pressure value measured by the pressure sensor 5 is recorded, an actuator valve 2 is closed, a supply valve 1 is opened, and the piston 433 is moved to an initial position, and then, the supply valve 1 is closed, the piston 433 is returned until becoming the recorded pressure value, the actuator valve 2 is opened, and the actuation of an actuator 9 is continued.SELECTED DRAWING: Figure 1 【課題】作動圧力を長時間保持する能力を有し、高精度かつ安定した液圧制御が可能な液圧駆動制御システム及び液圧駆動装置の制御方法を提供する。【解決手段】ピストン位置を調整することにより、システムの液圧を制御するシリンダ３と、シリンダ３のピストン位置を検出するエンコーダ４６と、システムの圧力状態を測定する圧力センサ５と、エンコーダ４６および圧力センサ５の検出値に基づき、ピストン４３３が所定の閾値を超えたか否かを検出することによりシリンダ３のストロークエンド条件を判定し、ピストン４３３が所定の閾値を超えたことを検出した場合、圧力センサ５により測定した圧力値を記録し、アクチュエータ弁２を閉じ、供給弁１を開き、ピストン４３３を初期位置に移動させた後、供給弁１を閉じ、記録した圧力値になるまでピストン４３３を戻し、アクチュエータ弁２を開いてアクチュエータ９の作動を継続する。【選択図】図１