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Electro-hydrostatic actuator of asymmetric pump-controlled asymmetric hydraulic cylinder

An electro-hydrostatic, asymmetric technology, applied in fluid pressure actuation devices, fluid pressure actuation system testing, fluid pressure actuation system components, etc. and other issues to achieve the effect of improving layout flexibility, improving utilization, and increasing bandwidth

Active Publication Date: 2018-09-07
BEIHANG UNIV
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Problems solved by technology

[0003] Traditional asymmetric hydraulic cylinders mostly use hydraulic pipelines for energy transmission and valve-controlled hydraulic cylinders to control actuation loading, but due to throttling losses, energy consumption is relatively large; ordinary pump-controlled asymmetric hydraulic cylinders are The cavity volume is asymmetrical, which will greatly limit the dynamic bandwidth of the system, and it is difficult to meet the design requirements in high dynamic application scenarios
[0004] In view of the above problems, the present disclosure proposes an electric hydrostatic actuator controlled by an asymmetric pump to control an asymmetric hydraulic cylinder, which uses cables instead of hydraulic pipelines for energy transmission, and the asymmetric hydraulic pump directly controls the asymmetric hydraulic cylinder for loading. The actuator has the advantages of high dynamics, flexible layout, and high energy utilization rate. It is a solution to the existing valve-controlled hydraulic cylinder system. good way

Method used

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  • Electro-hydrostatic actuator of asymmetric pump-controlled asymmetric hydraulic cylinder
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  • Electro-hydrostatic actuator of asymmetric pump-controlled asymmetric hydraulic cylinder

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Embodiment Construction

[0038] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only parts related to the present disclosure are shown in the drawings.

[0039] It should be noted that, in the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.

[0040] Such as Figure 1-4 As shown, the electric hydrostatic actuator of the asymmetrical pump controlling the asymmetrical hydraulic cylinder includes the servo motor, the asymmetrical hydraulic pump, the asymmetrical hydraulic cylinder, the force sensor and the controller; ...

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Abstract

The invention provides an electro-hydrostatic actuator of an asymmetric pump-controlled asymmetric hydraulic cylinder. The actuator comprises a servo motor, an asymmetric hydraulic pump, the asymmetric hydraulic cylinder, a force sensor and a controller; the servo motor drives the asymmetric hydraulic pump to perform forward rotation and reverse rotation to control the action of the asymmetric hydraulic cylinder; the asymmetric hydraulic cylinder is connected with the force sensor; the force sensor detects the magnitude of the acting force output by the asymmetric hydraulic cylinder, and a force feedback signal is generated according to the magnitude of the acting force, and the force feedback signal is sent to the controller; and the controller generates a motor control signal according to the force feedback signal, and sends the motor control signal to the servo motor.

Description

technical field [0001] The present disclosure relates to the technical field of electro-hydraulic servo control, in particular to an electro-hydrostatic actuation system in which an asymmetric hydraulic pump controls an asymmetric hydraulic cylinder. Background technique [0002] Hydraulic actuators are widely used in industry, especially asymmetric hydraulic cylinders have more obvious advantages due to their more compact structure. For example, asymmetric hydraulic cylinders are required in fields such as structural loading tests, industrial robots, machine tools and exoskeleton robots. The actuator is loaded. [0003] Traditional asymmetric hydraulic cylinders mostly use hydraulic pipelines for energy transmission and valve-controlled hydraulic cylinders to control actuation loading, but due to throttling losses, energy consumption is relatively large; ordinary pump-controlled asymmetric hydraulic cylinders are The asymmetric cavity volume will greatly limit the dynamic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B1/02F15B11/08F15B13/04F15B19/00F15B21/00
CPCF15B1/02F15B11/08F15B13/0401F15B19/00F15B21/001
Inventor 尚耀星孙华旺吴帅焦宗夏
Owner BEIHANG UNIV
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