Characteristics of Hydraulic and Electric Servo Motors

Sakama, Sayako; Tanaka, Yutaka; Kamimura, Akiya

doi:10.3390/act11010011

Cited by 22 publications

(10 citation statements)

References 31 publications

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“…On the other hand, Current results demonstrate that the selected servo motor is capable of folding the system while being compact enough to be integrated inside of the structure. As stated in the classification presented by, 23 the selected servomotor displays exceptional characteristics, boasting a power density of 66.67 W/Kg that ranks it among the top performers within its class.…”

Section: Performance Evaluationmentioning

confidence: 92%

Actuation study of self-reconfigurable bistable robots based on Kresling tower

Hu,

Roux,

Marionnet

et al. 2024

Active and Passive Smart Structures and Integrated Systems XVIII

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Origami, an ancient Japanese paper art, has inspired diverse fields, leading to modern origami-inspired engineering, notably origami robots known for outstanding versatility across scales. Recent advancements in the field of origami robots have ushered in improved performance through the implementation of innovative actuation methods and the incorporation of non-rigid origami. The latter, known for its energy-efficient approach utilizing multi-stabilities, facilitates shape-changing and shape-locking. Nevertheless, non-rigid origami in robotics remains in its formative stages, marked by persistent challenges, notably the intricate task of achieving precise actuation while managing the bistability-reconfiguration trade-off. This article aims to develop a multifunctional mesoscale reconfigurable robot based on the Kresling tower pattern, characterized by advanced mechanical properties such as rapid shape-changing, shape-blocking capabilities, and adjustable structural behavior. To this end, we present the development of a polypropylene (PP)-based origami robot based on the 'Kresling' pattern. An in-body actuation mechanism is developed to facilitate the robot's bistable shape-changing capabilities. Furthermore, we provide a comprehensive mechanical performance assessment of the origami robot.

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Section: Performance Evaluationmentioning

confidence: 92%

Actuation study of self-reconfigurable bistable robots based on Kresling tower

Hu,

Roux,

Marionnet

et al. 2024

Active and Passive Smart Structures and Integrated Systems XVIII

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“…Servo motors are widely used in various automation control systems [23,24]. The flow standard device controls the servo motor to move the piston back and forth, driving the piston to perform water intake and discharge actions, thereby providing a stable flow source.…”

Section: Design Of the Piston Devicementioning

confidence: 99%

Automatic Piston-Type Flow Standard Device Calibration System

Song,

Wang,

2023

Mathematics

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Measurement of flow is crucial for assuring product quality, increasing manufacturing effectiveness, and promoting the development of science and technology. With the advancement of calibration and automation, standard devices using the mass method, volumetric method, and master meter method have limitations, such as low calibration efficiency and automation, large size, and complex operation. Innovations in this area are desperately needed. To realize the automation of calibrating ultrasonic water meters, a piston-type flow standard device calibration system with a high degree of automation, high calibration efficiency, small size, and easy operation was designed. A piston-type flow standard device was designed, the standard device was modeled, the selection of the main hardware and the design of the automated control of the hardware parts were completed; an automation control system adapted to the flow standard device was developed; and, furthermore, a water meter flow point calibration algorithm integrating the start–stop method and the dual-time method, as well as a water meter flow correction algorithm, was devised to improve the efficiency of ultrasonic water meter calibration. An uncertainty assessment of the designed system was completed; the standard uncertainty and expanded uncertainty of the device were 0.013% and 0.026%. Meanwhile, flow calibration tests were conducted, validating the rationality of the automated calibration algorithm for ultrasonic water meters. The results show that ultrasonic water meters calibrated with flow correction have a flow error within ±3% in the “low flow range” and within ±2% in the “high flow range”, with a repeatability of less than 0.05%. This indicates that a piston-type flow standard device, coupled with an automation calibration control system, can efficiently, accurately, and conveniently perform water meter calibration, and the system has good practical value.

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“…Sayako 5 has demonstrated that the achievable torque density difference between the HMs and PMSM is still significant. Therefore, it is necessary to optimize the EM to minimize the total space needed while designing EHUs.…”

Section: Introductionmentioning

confidence: 99%

Design methodology for an integrated axial piston-type electrohydraulic unit

Sarode

Shang

Vacca

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper proposes a design methodology for power-dense and high-efficient electrohydraulic units (EHUs) that can be used to select design specifications for the electric machine (EM) for a given hydraulic machine (HM) architecture. The proposed method evaluates EHU performance considering both electric and hydraulic power losses. The compactness of the EHU is achieved by integrating an axial piston unit as HM inside a permanent magnet EM. The paper provides a sensitivity analysis for important EHU design specifications and discusses the best choices for reducing total mass and energy loss. The study finds that greater aspect ratios promote power-to-weight ratio, while high voltage promotes energy efficiency. The paper also discusses the choice of fixed versus variable displacement HMs, with the finding that a variable displacement unit helps address low efficiency limits of low-speed operation, particularly for low voltage electric machines. Additionally, variable displacement can also be used to reduce EM losses when meeting a flow-pressure demand. The proposed methodology has applications in fields such as off-road vehicles.

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Characteristics of Hydraulic and Electric Servo Motors

Cited by 22 publications

References 31 publications

Actuation study of self-reconfigurable bistable robots based on Kresling tower

Actuation study of self-reconfigurable bistable robots based on Kresling tower

Automatic Piston-Type Flow Standard Device Calibration System

Design methodology for an integrated axial piston-type electrohydraulic unit

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