Electro Hydrostatic Actuator
Electro Hydrostatic Actuator - Related Videos
06:45
Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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2022
In this paper, an adaptive filter based on a normalized least mean square (NLMS) algorithm and a rotational speed estimation method are introduced to detect the electrical and hydraulic faults of the electro-hydrostatic actuator (EHA). The efficacy and feasibility of the aforementioned methods are verified through simulations and experiments.
09:04
A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
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2022
A simulation model specifically supporting the preliminary design of an electro-variable displacement pump (EVDP) is developed and partially verified by experiments. The control performance, life, reliability, etc., can all be evaluated using the proposed model, which covers the main performance requirements under the EVDP preliminary design task.
08:17
Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale
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2016
Here, we fabricate 3D polymeric micro/nano structures in which both the shape and the molecular alignment can be engineered with nanometer scale accuracy by the use of direct laser writing. Light induced deformation of several types of liquid crystalline elastomer microstructures can be controlled in the microscopic scale.
08:59
Modeling and Experimental Analysis of the Single-Shaft Coaxial Motor-Pump Assembly in Electrohydrostatic Actuators
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Cited by 1 •
2022
We built a simulation model to evaluate pump flow characteristics and performance of the single-shaft coaxial motor-pump assembly in electrohydrostatic actuators and investigate the overall efficiency in a wide set of working conditions of the motor-pump assembly experimentally.
01:30
Applications of Integration to Find Hydrostatic Pressure
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2026
Hydrostatic force is a fluid's total force at rest on a surface. For a horizontal surface submerged at a fixed depth, the pressure is constant and calculated as the product of fluid density, gravitational acceleration, and depth. In the case of a vertical dam wall submerged in water, this force is not evenly distributed due to the increasing pressure with depth. This variation arises from the cumulative weight of the water above each point. Integration is used to account for the continuous...
FAQs
The electronic command sets the intended motion, while the electric motor drives the hydraulic pump. As the pump pressurizes fluid, valves regulate its movement and sensors provide information for controlling position and load response. The local reservoir keeps fluid management within the actuator, allowing these components to coordinate without relying on a centralized hydraulic circuit.
Electrical input drives the motor, and the motor supplies the pump with mechanical power. Pump pressurization creates the hydraulic conditions needed to produce controlled force or displacement, while electronic commands determine the desired response. Valve regulation and sensing help match fluid movement to the commanded position and the load acting on the actuator.
An EHA places the pump, reservoir, valves, and sensors near the motion-producing element instead of depending on an external centralized circuit. This arrangement can reduce external plumbing and simplify system integration. It also combines hydraulic power density with electrical control, supporting electrified designs that seek improved efficiency, reliability, and flexibility.
The main influencing factors are the electronic command, motor-driven pump operation, fluid pressurization, valve regulation, sensor information, and the applied load. Together, these elements determine whether the actuator produces the intended force or displacement and reaches the required position. Their coordination is especially important when the application demands precise, high-power movement.
Operation begins with an electronic motion command. The electric motor responds by driving the hydraulic pump, which pressurizes fluid locally. Valves regulate the resulting fluid movement, while sensors monitor information relevant to position and load response. The actuator then uses these coordinated functions to deliver controlled motion without requiring a separate external hydraulic circuit.
EHAs suit applications that require precise, high-power movement within compact or electrified architectures. The provided examples include aerospace flight controls, industrial machinery, robotics, and other systems moving away from centralized hydraulic arrangements. Their local hydraulic power and electrical control can support simpler integration where reducing external plumbing and maintaining flexible actuation are important.