5 FAQs about Actuator equipment energy storage

What are electro-hydrostatic actuators?

Electro-hydrostatic actuators (EHAs) with high efficiency and energy recovery are emphasized in aerospace, engineering machinery, vehicles, and robotics . The application of EHAs enhances the energy efficiency of the whole machine . In addition, energy recovery provides novel potential for further increasing energy savings and range, .

What materials are used to make actuators?

Dielectric elastomers [10 ], liquid-crystal elastomers [ 19 ], hydrogels [ 11 ], carbon-based materials [ 20] and paper-based materials [ 16] have been used for fabricating actuators driven by humidity [ 20 ], organic vapor [ 21 ], light [ 22 ], electricity [ 14, 17, 18] and multi-stimuli [ 15, 16].

What is a hydraulic cylinder actuator (EHA)?

The EHA is a linear actuator comprising a hydraulic cylinder as the actuator, which represents a crucial branch of the pump-controlled system, as illustrated in Fig. 1. The structure is an integrated unit with a motor-pump, valve block, and hydraulic cylinders.

What is a four quadrant actuator?

Four-quadrant operating principle The actuator of an EHA is subjected to forces in both the push and pull directions. In addition, the speed direction of the actuator includes both extension and retraction. The vector relationship between speed and force forms a planar coordinate system with four quadrants.

What is gp4 paper based actuator?

Based on the above-mentioned fascinating characteristics of GP paper-based materials and inspiration from electric fish, a multi-functional actuator made with GP4 paper is elaborately designed, which integrates the functions of actuator and supercapacitor in a single device. The fabrication is summarized as follow.

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