micro pump working principle

This report also discusses a new actuator which has dual cylindrical structure. The deformation of such a huge spherically shaped reflector into different transient parabolic shapes is achieved by using 2225 hydraulic actuators which change the position of the 2225 nodes through the connected down tied cables. The printed soft parallel actuator is then immersed into NaOH solution with specific voltage applied to it via two contactless electrodes. Ainla, Alar; Verma, Mohit S; Yang, Dian; Whitesides, George M. This article describes a soft pneumatic actuator that generates cyclical motion. Fabrication, characteristics and performance of the cellulose EAPap and its hybrid EAPap materials are illustrated. McGovern, S. T.; Spinks, G. M.; Xi, B.; Alici, G.; Truong, V.; Wallace, G. G. Small, highly-mobile "swimming" robots are desired for underwater monitoring operations, including pollution detection, video mapping and other tasks. The actuator remains in a latched state/shape after the electrical field is no longer present. Performance Comparison of Sweeping/Steady Jet Actuators, Hirsch, Damian; Mercier, Justin; Noca, Flavio; Gharib, Morteza. The morphing wing prototype designed for subsonic cruise flight conditions (Mach 0.2 0.3; angle of attack - 1 +2), combines three principal subsystems: (1) flexible extrados, (2) rigid intrados and (3) an actuator group located inside the wing box. Energy efficiency, lightweight and scalability are key features for actuators in applications such as valves, pumps or any portable system. We demonstrate that the actuation is directly related to the fibre microstructure and its biochemical composition. For any very precise and small amplitudes of motion, micromachined electrostatic actuation may be used because it is the most compact in size, with low power consumption and has more straightforward sensing and control options.less, Simulation of fluid-structure interaction in micropumps by coupling of two commercial finite element programs. Biomimetic photo-actuation: sensing, control and actuation in sun-tracking plants. 15. In addition, the modified actuator generates four different types of flow fields, namely: a non oscillating downward jet, a non oscillating upward jet, a non oscillating straight jet, and an oscillating jet. The possibility of silkworm (Bombyx mori) protein as a base material of biomimetic actuator was investigated in this paper. The proposed microdevice provides an advanced genetic analysis platform in terms of multiplexity, simplicity, and portability in the fields of biomedical diagnostics. The elastomeric film can be made of many elastomeric materials such as, for example, but not limited to, acrylic, silicone and latex. Results from the simulation model and from the in vivo counterpart show that the pulsatile pump provides higher cardiac output, left ventricular unloading, cardiac pulsatility, and aortic valve flow as compared with the continuous flow model at the same level of support. The concept is examined and demonstrated in two proprioceptive flexible fluidic actuators (FFAs) that use conductive liquids as their working fluids: a linear actuator and a bending actuator. At a temperature above temperature Tg material is soft and can be easily reshaped into another configuration. The scaling behaviour discussed indicates significant future improvement on actuator deflection. Refreshable Braille can help visually impaired persons benefit from the growing advances in computer technology. Electric power is applied simultaneously to the elements. As the width of the valves increases, its tendency for bending decreases. Lima, Marcelo B; Barreto, Inak S; Andrade, Stfani Iury E; Almeida, Luciano F; Arajo, Mrio C U. Chen, Jianguo; Liu, Guoxi; Cheng, Jinrong; Dong, Shuxiang. Fast bender actuators for fish-like aquatic robots. These characteristics are desirable in many applications including legged robots, exoskeletons for human performance amplification, robotic arms, haptic interfaces, and adaptive suspensions. This paper presents the development of a SPEA using the MACCEPA principle with a self-closing mechanism. Bucky gel actuators optimization towards haptic applications, Bubak, Grzegorz; Ansaldo, Alberto; Ceseracciu, Luca; Hata, Kenji; Ricci, Davide. Kholwadwala, Deepesh K [Albuquerque, NM; Johnston, Gabriel A [Trophy Club, TX; Rohrer, Brandon R [Albuquerque, NM; Galambos, Paul C [Albuquerque, NM; Okandan, Murat [Albuquerque, NM. Osmotic actuation is a ubiquitous plant-inspired actuation strategy that has a very low power consumption but is capable of generating effective movements in a wide variety of environmental conditions. Electroactive polymers seem to be a potential actuation technology that could satisfy these requirements. In order to measure the chloride ion concentration, a measurement system is needed which can detect this concentration for prolonged times reliably. by hopping over) obstacles that are large in size relative to the robot and, are capable of operation in unpredictable terrain over long range. With the use of the attack angle and the length of the valves as design parameters, the studied design shows promising results. Therefore, there is a need for a reliable control system, which includes H infinity controller along with redundant actuators. The displacement range is preferably the stroke of the actuator. First step to demonstrate the feasibility of the LOM technique for the torsional actuator device fabrication is to make near net shape segments. Actuators with a deep initial encapsulated electrode are able to induce the highest velocities as they can operate at higher voltages without breakdown of the dielectric. The work presented are intended in developing a model to be used in CFD flow control simulations. Actuator parameters used in the models were chosen based on the results of a parametric study. Development of novel textile and yarn actuators using plasticized PVC gel.

PMID:24385868. The applications of the wearable sensors towards motion detection and health monitoring are investigated. A quasi-static analytical model distills the underlying mechanics down to the three effects of friction, bending, and binding, which enables prediction of the behavior of generic spool-packaged SMA actuators with specifiable geometric, loading, frictional, and SMA material parameters. The evolution of the actuation properties as the strain and the output force have been characterized as well. As a result of the curing and attachment to a flat surface, the two-dimensional stress state inside the piezoceramic layer leads to an expected increase of around 51% for the longitudinal piezoelectric strain constant. In this paper, a small-scale yet powerful MR actuator was designed to build a multi-finger interface for the 6 DOF haptic device. Two types of flexures were studied including a cantilever beam that is fixed on one end, and free on the other. The energy and space requirements of the whole system inhibit portability and contribute to costs. The proposed modification could also be applicable to other pressure-actuated joints of similar configuration. To confirm this result, we reconsider the experimental results of the actuation moment measurement of the LIPCA and bare lead zirconium titanate. Design of a piezoelectric-hydraulic pump with active valves. High-Force Dielectric Electroactive Polymer (DEAP) membrane actuator, Hau, Steffen; York, Alexander; Seelecke, Stefan. Laboratory and flight tests of these applications indicate that actuator and sensor placement methods are effective and important. The vane actuators were robust. Analytical analysis of a circular unimorph piezoelectric actuator in the range of low voltages and pressures. The diameter of the piezoelectric layer is smaller than the attached glass. Magnet filler-polymer matrix composites (Magpol) are an emerging class of morphing materials. % The work output of Magpol was also calculated using the work loop method. Luong, Tuan Anh; Cho, Kyeong Ho; Song, Min Geun; Koo, Ja Choon; Choi, Hyouk Ryeol; Moon, Hyungpil. Brailovski, V.; Terriault, P.; Georges, T.; Coutu, D. An experimental morphing laminar wing was developed to prove the feasibility of aircraft fuel consumption reduction through enhancement of the laminar flow regime over the wing extrados. Baycan, C. M.; Utku, S.; Das, S. K.; Wada, B. K. Actuator placement in adaptive truss structures is to cater to two needs: displacement control of precision points and preloading the elements to overcome joint slackness. The measured packaging loss was 0.2 dB and the return loss was 33.6 dB at 5 GHz. If you have any questions when using the

Some embodiments of the disclosed subject matter also include methods for operating the disclosed robotic systems. Kim, Baek-Chul; Kim, Hyunseok; Nguyen, H. C.; Cho, M. S.; Lee, Y.; Nam, Jae-Do; Choi, Hyouk Ryeol; Koo, J. C.; Jeong, H.-S. The characteristic of discharge and flow control effect of annular-circular plasma synthetic jet actuator has been studied by means of of numerical simulation and experiment. This article details the next step in the development of the micro hydraulic actuator - fluid transport driven by exergonic Adenosine triphosphate (ATP) hydrolysis reaction in the presence of ATP. In addition, as the LIM is compact, portable, and easily integrated into any liquid, it might be utilized as an essential component in advanced hand-held drug delivery devices. Mn-Zn ferrite fillers with different saturation magnetizations (Ms) were synthesized. In this work, a pneumatic actuator is modeled as an elastic element with controllable stiffness and equilibrium point, both of which are functions of air masses in the two chambers. Those studies have been updated to incorporate the results of static rig, flow duct, and wind tunnel tests. Electroactive polymer (EAP) actuatorsBackground review. Various embodiments of the motor are disclosed, and the rotor element may be moved linearly or arcuately. Garner, L. J.; Wilson, L. N.; Lagoudas, D. C.; Rediniotis, O. K. The development of a biomimetic active hydrofoil that utilizes shape memory alloy (SMA) actuator technology is presented. The model was validated against existing experimental data. The control effect largely depends on the excitation method, including the number and locations of actuators. Piezoelectric micromachined ultrasonic transducers and micropumps: from design to optomicrofluidic applications, Khazaaleh, Shadi; Saeed, Numan; Taha, Inas; Madzik, Mateusz T.; Viegas, Jaime. ; Silva, E.C.N. Moses, Robert W.; Wieseman, Carol D.; Bent, Aaron A.; Pizzochero, Alessandro E. Ongoing research in buffet loads alleviation has provided an application for recently developed piezoelectric actuators capable of higher force output than previously existing actuators could provide and that can be embedded within the vehicle s structure. Theoretical and simulated results show that the pseudo-three-layer actuator offers higher performance than the two-layer and three-layer actuators with regard to the two most important characteristics of actuators, namely, driving force and theoretical stroke. The variable area nozzle also includes a plurality of return mechanisms deforming the SMA actuator when the SMA actuator is in its martensitic state. Here we show that hydraulic actuations of hydrogels with designed structures and properties can give soft actuators and robots that are high-speed, high-force, and optically and sonically camouflaged in water. The principle of operation of these devices is rather simple. Operational testing of the LPMA demonstrated that the actuator is capable of various types of load functions. The complete research and development processes further confirm the feasibility of developing a new type of inchworm actuator with high performance based on PZT actuation and ERFs control technology, which provides a reference for the future development of a new type of actuator. Finite element analysis of multilayer DEAP stack-actuators, Kuhring, Stefan; Uhlenbusch, Dominik; Hoffstadt, Thorben; Maas, Jrgen. Especially, the soft actuators can response at a very small temperature difference ( T 2.3 C); therefore, even skin touch can quickly drive the actuator, which greatly broadens its applications in daily life. In this paper, the systematic development of an electro-optically actuated zoom-lens will be discussed. TagThe composition of [, Accoto, D.; Nedelcu, O.; Carrozza, M.; Dario, P. Theoretical analysis and experimental testing of a miniature piezoelectric pump. Besides that, the pump actuators exhibited excellent stability under cyclic actuation tests. Haptic devices with multi-finger input are highly desirable in providing realistic and natural feelings when interacting with the remote or virtual environment. Measured results show that the actuation voltage of the switch is under 7V for electro-thermal added electrostatic actuation. Flow-splitting and flow-mixing thermally actuated spool valves have been developed for controlling flows of a heat-transfer fluid in a temperature-regulation system aboard the Mars Science Laboratory (MSL) rover. Malvandi, A.; Ganji, D. Magnetohydrodynamic mixed convective flow of Al2O3water nanofluid inside a vertical microtube. The grouping procedure is then used to determine actuator groups that improve overall interior noise reductions by 5.3 to 15 dB, compared to the baseline experimental configuration. Piezoelectric actuators for active optics. Utilising a transformer cascade, a variety of input voltages are studied for their effect. The testing stations age with time and repeated use; and with aging comes maintenance; and with maintenance comes expense. Herein, we present our approach, based on the use of parylene-C coating. Ionogel electrolytes can be fabricated for electrochemical actuators with many desirable advantages, including direct low-voltage control in air, high electrochemical and thermal stability, and complete silence during actuation. The presented extensive investigation of mechanical performance for soft actuators with varying geometric parameters demonstrates the practical application of the design tool, and the robustness of the actuator hardware design, towards diverse soft robotic systems for a wide set of assistive wearable technologies, including replicating the motion of several parts of the human body. Frequency tuning and parametric actuation are also studied. Using composite blades the distribution of strain energy is defined using a Finite Element model with imposed rotor-dynamic and aerodynamics loads. Performance range of SMA actuator wires and SMA-FRP structure in terms of manufacturing, modeling and actuation. The obtained results emphasize the importance of the devised rational produce in designing beam-actuator systems with minimal elastic distortions. If you need an account, pleaseregister here. An artificial muscle actuator for biomimetic underwater propulsors.

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