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177 articles for “Under actuation”
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Design of Thermal Actuator for Correcting Misalignment in Optics of Space Telescopes
Abstract: There are two types of actuators such as: linear actuator and rotary actuator. Basically, linear actuators are used for the actuation such as lifting, switching, moving etc. But when we use the actuator for the correction of misalignment, it requires precision in output. Recently there are many types of actuators available in market such as brushless DC motors, stepper motors, shape memory alloys, hydraulic and pneumatic actuators, piezoactuator, thermal actuators …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 6, Issue 1, 2017 · pp. 1–4 Read article
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Experimental Characterization of Amplified Piezo Stack Actuator for Controlled Actuation of Microgrippers
Abstract: This paper presents the results of experimental characterization of an Amplified Piezoelectric Actuator (APA) under quasi-static operation. The data obtained from the study will be used for designing a control system for a microgripper which will be actuated using the APA. An improved measurement method suited for static force measurement was devised. The study identified relation between force applied by the piezo-actuator in relation to the applied voltage and resultant …
Published in Trends in Machine design · Vol. 2, Issue 1, 2015 · pp. 59–65 Read article
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Design and Development of an Under-actuated Mechanism for Grasping and Grabbing of Objects
Abstract: Abstract: An under-actuated mechanism is designed and developed for robotic hand application suitable for handling both regular and irregular shaped objects. The hand consists of three fingers and use two actuators to control 6 degree-of-freedoms (DOFs) and proves to be versatile for material handling in small to large scale application. A rotary actuator is used and grasping of object is done by actuating three fingers on a sliding base. In …
Published in Journal of Mechatronics and Automation · Vol. 1, Issue 2, 2014 · pp. 67–76 Read article
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Hydraulic vs. Electric: A Comparative Review of Brake and Clutch Actuation Systems
Abstract: This review article compares hydro and electric actuation systems for clutches and brakes in detail, examining their design concepts, characteristics, and probable uses. Long-used in the automotive sector, hydraulic appliances use fluid pressure transmission to function. They are dependable and easy to use, but they have drawbacks such fluid leaks and complicated systems. On the other hand, electromechanical actuators serve their purpose in electric actuation systems, which provide benefits including …
Published in International Journal of Machine Systems and Manufacturing Technology · Vol. 1, Issue 2, 2023 · pp. 20–27 Read article
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A Constraint-Driven Generative Design Methodology for Modular Actuated Robotic Components in Decentralized Manufacturing
Abstract: This work formalizes a constraint-driven generative design framework for actuator-integrated robotic components intended for decentralized additive manufacturing. Conventional topology optimization typically prioritizes structural efficiency while treating actuator integration, modular interfaces, and fabrication constraints as secondary considerations. In contrast, the proposed methodology encodes these requirements as first-order geometric and mechanical constraints prior to automated material redistribution. The framework defines preserved actuator geometry, bounded design envelopes, representative loading abstractions, and manufacturability-aware domains …
Published in International Journal of Robotics and Automation in Mechanics · Vol. 4, Issue 1, 2026 · pp. 1–12 Read article
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Finite Element Modeling of Active Twist in Rotor Blades using IDE-PFC Actuators
Abstract: Blade Vortex Interaction in rotating helicopter blades contributes significantly to the instability and high vibration levels during its operations. It is therefore essential to evolve a mechanism to reduce unwanted vibration. Several methods/devices, like the smart trailing edge flap actuators, active blade twist, etc are suggested. Active blade twist concept deals with changing the angle of attack and thereby reducing vibration and noise. The piezoelectric actuators are the promising devices …
Published in Journal of Experimental & Applied Mechanics · Vol. 5, Issue 2, 2014 · pp. 1–13 Read article
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Modeling and Analysis of a Diaphragm Micropump with Annular Actuation Using Bond Graphs
Abstract: Micropumps have been around for a while and are utilized for many things, including electrical cooling and biomedical applications. Numerous researchers have experimented with varying the chamber, diaphragm, pumping mechanism, or actuation mechanism materials to improve the device's performance. Despite this, the micropumps employed in the practical applications mentioned above fall short of meeting the necessary flow rates and pressure. In this study, annular actuation is proposed to enhance performance. …
Published in International Journal of Machine Systems and Manufacturing Technology · Vol. 2, Issue 2, 2024 · pp. 34–48 Read article
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Development of a Heat Actuator Using Liquid-Vapor Phase Change of R134a
Abstract: AbstractLarge volume changes can be produced by liquid-vapor phase change of working fluids which can be used in actuators as the driving power source. The temperature range of working of such actuators depends on the characteristics of the phase change working fluid. In this paper we discuss the concept and design of a heat actuator which uses liquid-vapor phase change of its working fluid for actuation of a piston. The …
Published in Journal of Thermal Engineering and Applications · Vol. 6, Issue 1, 2019 · pp. 1–4 Read article
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Advancements in Polymer-Based Sensors and Actuators for Structural Health Monitoring in Aerospace: A Comprehensive Review of Emerging Trends
Abstract: Structural health monitoring (SHM) has emerged as a critical aspect of aerospace engineering, aiming to ensure the safety and reliability of aircraft structures throughout their operational lifespan. In aerospace engineering, structural health monitoring is one of the most important aspects of aerospace engineering. It aims to ensure that aircraft structures are safe and reliable over their entire service life. Polymer-based actuators and sensors have attracted a lot of attention because …
Published in Journal of Polymer & Composites · Vol. 12, Issue 4, 2024 · pp. 173–193 Read article
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Dielectric Elastomers in Actuation and Energy Applications: Material Behavior and Design Strategies
Abstract: Dielectric elastomers (DEs), a class of electroactive polymers, have attracted significant attention for their ability to undergo large, reversible deformations under electric stimulation. This unique capability makes them highly suitable for a range of actuation and energy harvesting applications, especially in the emerging fields of soft robotics, flexible electronics, artificial muscles, and sustainable power generation systems. DEs offer compelling advantages such as low weight, mechanical flexibility, high energy density, and …
Published in International Journal of Electro-Mechanics and Material Behaviour · Vol. 3, Issue 1, 2025 · pp. 13–18 Read article
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Optimization of Control Parameters Based on Genetic Algorithm Technique for Integrated Electrohydraulic Servo Actuator System
Abstract: Electrohydraulic servo systems have been used in industry in a wide number of applications. Its dynamics are complex and highly nonlinear, these features significantly add uncertainty to the controller design procedure. Therefore, it is a demanding task to obtain a precise mathematical model of controlled servo systems. The present paper presents the development of a detailed non-linear mathematical model of the ISA and a computer simulation program using MATLAB/SIMULINK package. …
Published in Journal of Mechatronics and Automation · Vol. 6, Issue 3, 2019 · pp. 24–41 Read article
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Theoretical and Experimental Investigation of Non-linear Vibration Response of an IPMC Actuator Subjected to Alternating Electric Potentialf
Abstract: The precise predication of stable and unstable zone for an applied excitation voltage and frequency is of importance in many micromechanical systems utilizing ionic polymer metal composite (IPMC) as the actuator. A linear dynamic model thus will no longer be valid for IPMC actuator having low thickness and thus more flexible. In this article, non-linear vibration characteristics of a silver (Ag) based IPMC actuator is studied under alternating electric potential …
Published in Journal of Mechatronics and Automation · Vol. 1, Issue 1, 2014 · pp. 11–26 Read article
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Soft Robotic Actuators in Corporeal Assistive Devices
Abstract: The following paper discusses various applications of soft robotic actuators mainly in the form of corporeal assistive devices i.e., devices for assisting various parts of the human body. Being inexpensive, light weight, soft, non-restrictive and easy to use they are replacing the conventional rigid actuators in every application. Soft actuators are pneumatically powered and consist of compliant elastomeric materials. This paper reviews the use of soft robotic actuators in assistive …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 6, Issue 1, 2018 · pp. 17–21 Read article
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Integration of Smart Sensors and Actuators for a Fully Automated 360° Fire Suppression System
Abstract: In today’s modern era fire safety continues to be a major concern. Therefore, creating a dependable fire safety system is essential. This abstract represents an innovative solution: a 360-degree rotating fire protection system. This system is designed to revolutionise fire suppression by offering comprehensive coverage of enclosed spaces and it also reduces the damage done to surroundings during fire suppression as well as reduces the risk of human life. This …
Published in Journal of Microelectronics and Solid State Devices · Vol. 11, Issue 3, 2024 · pp. 25–32 Read article
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Advancements in Electromechanical Modeling for Energy Harvesting and Actuators in Robotics and Design Engineering
Abstract: This article examines the expanding field of electromechanical modeling, highlighting the integration of energy harvesting, actuator behavior, and magnetic/electromagnetic analyses in the design and production of electromechanical systems. It discusses the application of the Galerkin method for modeling intricate vibrations and torque generation, with a particular focus on its use in actuators for robotics and induction motors. Significant advancements in energy harvesting methods, especially those utilizing mechanical vibrations, have led …
Published in International Journal of Electro-Mechanics and Material Behaviour · Vol. 2, Issue 2, 2024 · pp. 21–25 Read article
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Development of a Novel Hybrid Precision Positioning Table Utilizing Stepper Motor and Amplified Piezo Actuator
Abstract: This research paper presents a unique actuating method for a single-axis precise positioning system using a combination of stepper motor and amplified piezo actuator (APA). The adopted method is to employ combination of two separate stages one above the other to achieve the precise positioning. The bottom stage uses a stepper motor (SM) coupled to a fine lead screw for coarse positioning stage (CPS). The secondary stage (SS) is mounted …
Published in Trends in Machine design · Vol. 2, Issue 1, 2015 · pp. 26–33 Read article
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Model Based Controller Design for Position Control of Servo Controlled Hydraulic Actuator against Air Entrainment
Abstract: Position control is important for numerous industrial and aircraft applications. Electro-hydraulic actuators are used for position control for advantages they provide over other actuation systems. The hydraulic fluid used for actuation, though desired to be incompressible, has some compressibility in practice. Entrainment of air in the fluid increases compressibility effect by reducing the effective bulk modulus. Reduced bulk modulus makes position control difficult. The paper studies the effect of effective …
Published in Journal of Mechatronics and Automation · Vol. 3, Issue 2, 2016 · pp. 25–35 Read article
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Experimental design and FEA Evaluation of Vibration-based Actuator
Abstract: AbstractCircuit breakers are mostly used in power distribution systems. Adornments of electrical switch extend and supplement its capacity. Essentially, circuit breakers are utilized in circumstance where current stock surpasses characterized cutoff points or short out in this way, which lead to component failure. Mechanical life test, operational dependability test, spillage module activity test, under voltage and shunt discharges test, assistant and caution contacts test are significant in the electrical switch …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 2, 2020 · pp. 33–40 Read article
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Design, Modeling and Simulation of a 2-DOF Microgripper using Piezoelectric Actuator
Abstract: Aiming at the micro-assembly and micromanipulation of micro structures, a monolithic compliant-flexure based microgripper is introduced. This paper presents the design, modeling and simulation of a 2 DOF monolithic microgripper. In the proposed microgripper 2 piezoelectric stack actuators are used to obtain the tip displacement and the gripping force. The relationship between the gripping force, tip displacement in horizontal and vertical direction, input force and input displacement of the piezoelectric …
Published in Recent Trends in Electronics Communication Systems · Vol. 2, Issue 1, 2015 · pp. 10–18 Read article
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Design and Fabrication of a Piezo Actuated Flapping Mechanism for a Micro Aerial Vehicle
Abstract: The main purpose of this work was to spear head research and development in Micro Aerial Vehicles (MAVs) especially in the development small flapping wing systems which can greatly be used for defense as well as surveillance purposes. This project focused on the development of a flapping wing mechanism with a wing span of just 3 cm using a piezoelectric bimorph actuator. Keywords: Micro Aerial Vehicles, MAV, Piezoelectric, Bimorph, Actuator, …
Published in Journal of Aerospace Engineering & Technology · Vol. 7, Issue 1, 2017 · pp. 28–33 Read article