Electro-hydraulic servo actuator capable of implementing long-stroke and high-frequency loading, and control method
US11867207B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2022 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Mar 18, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7733
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The disclosure discloses an electro-hydraulic servo actuator capable of implementing long-stroke and high-frequency loading and a control method. The actuator includes: a long hydraulic cylinder with a piston, a short hydraulic cylinder with a piston, a fixed-end rod, low frequency and high frequency electro-hydraulic servo valves, a left rod chamber, a right rod chamber, a force applying end head, and a force applying end rod. With this structure, the displacement of the piston of the short hydraulic cylinder is a combination of small-displacement and high-frequency movement and large-displacement and low-frequency movement, so as to realize the generation of large-displacement and high-frequency movement. Therefore, a target large-displacement and high-frequency excitation is applied to the specimen under load test. The actuator can output high-frequency and large-displacement target excitation of 0.1 Hz to 200 Hz and 0 mm to 1500 mm, and has a simple mechanical structure, advanced control process, and good practicability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.