Relevant bibliographies by topics / Servo actuators

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Servo actuators'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Servo actuators"

1

Krivts, Igor L. "New Pneumatic Cylinders for Improving Servo Actuator Positioning Accuracy." Journal of Mechanical Design 126, no. 4 (2004): 744–47. http://dx.doi.org/10.1115/1.1737380.

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Positioning accuracy of pneumatic servo actuators depends on parameters of the actuator and control system, and also on the friction force. This paper reports on new constructions of the pneumatic cylinders, which are the integral part of the servo actuator. Experimental examination of these servo actuators has shown that they could provide improved accuracy performance over the system with ordinary pneumatic cylinder.
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Vayalali, Praneet, Michael McKay, Jayanth Krishnamurthi, and Farhan Gandhi. "Horizontal Stabilator Utilization for Post Swashplate Failure Operation on a UH-60 Black Hawk Helicopter." Journal of the American Helicopter Society 65, no. 2 (2020): 1–13. http://dx.doi.org/10.4050/jahs.65.022009.

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A flight simulation model for the UH-60 Black Hawk, based on Sikorsky's GenHel model, is modified to simulate a locked failure of a main rotor swashplate servo actuator, which is compensated by using the stabilator as a redundant control effector. Steady-state trim analysis is performed to demonstrate feasibility of trimmed flight in various conditions with different locked servo actuator positions for the forward, aft, and lateral actuators. A model-following, linear dynamic inversion controller is implemented and modified to account for locked actuator position. Postfailure, the controls are reconfigured to partially reallocate the control authority in the longitudinal axis from the main rotor longitudinal cyclic to the stabilator. This is done by manipulation of only the control allocation relating pilot stick inputs to servo actuator positions, whereas the feedback control gains and mechanical rigging between servo actuators and rotor pitch controls remain identical to the baseline. Flight simulation results demonstrate the ability of this reallocation to compensate for locked failure of the forward main rotor swashplate servo actuator, as well as the ability of the aircraft to decelerate from cruise at 120 kt to 50 kt, slower than the published safe rolling landing speed of 60 kt. A similar range of locked positions of the forward and aft actuators is demonstrated to be feasible for aircraft recovery using control of the stabilator. Feasibility of aircraft recovery for locked positions of the lateral servo actuator is also considered, as well as the effect of variation in gross weight, speed of actuator locking, and delays in fault detection and identification.
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Liu, S., and J. E. Bobrow. "An Analysis of a Pneumatic Servo System and Its Application to a Computer-Controlled Robot." Journal of Dynamic Systems, Measurement, and Control 110, no. 3 (1988): 228–35. http://dx.doi.org/10.1115/1.3152676.

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Pneumatic actuators are capable of providing high power output levels at a relatively low cost. In addition, they are clean, lightweight, and can be easily serviced. The difficulty of achieving a high-bandwidth, stable, pneumatic control system has limited its use in robotic position control applications. For open-loop control applications, such as many robot grippers, pneumatic actuators are often used. In this paper, direct-drive pneumatic servo-actuators are examined for their potential use in robotic applications. A complete mathematical model of the actuator is derived, and several control algorithms are tested numerically and experimentally. Our analysis shows that pneumatic systems are practical for use in servo-control applications. The main limitation is that of the system response time, which is determined by the valve flow characteristics and supply pressure. Large output forces can be obtained and accurately controlled with the servo-valve and differential pressure transducer used in the experiments.
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Miyagawa, Toyomi, Kohei Hori, Yukihisa Hasegawa, Koichi Suzumori, and Hajime Sudo. "Micro SCARA Robot for Miniature Parts Assembling." Journal of Robotics and Mechatronics 9, no. 5 (1997): 341–47. http://dx.doi.org/10.20965/jrm.1997.p0341.

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In this report, application of newly developed ultra-small servo actuators to a micro SCARA robot is presented. An ultra-small servo actuator consists of a miniature brushless DC motor, a reduction gear, and an optical encoder for monitoring the rotation of the motor. Two prototypes of different sizes were developed: one is 3mm in diameter and 10mm in length, and the other is 5mm in diameter and 18mm in length. Including the vertical positioning of the hand the robot has three degrees of freedom. First, the structure of the ultra-small servo actuator is shown and then the output characteristics of the 3mmdiameter and the 5mm diameter servo actuators are described, respectively. Next, the structure and control system of the micro SCARA robot, which has a 24.5mmlong arm, are described. Finally, flexible micro actuators, combined in parallel and acting a miniature handling system, are reported. They enable the gentle handling of small, fragile objects. The prototype of this micro SCARA robot enables the assembly of miniature objects in a small space. In the future, we expect this robot to find application as an inspection robot in narrow spaces, such as in small-diameter pipelines.
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McClamroch, N. H. "Displacement Control of Flexible Structures Using Electrohydraulic Servo-Actuators." Journal of Dynamic Systems, Measurement, and Control 107, no. 1 (1985): 34–39. http://dx.doi.org/10.1115/1.3140704.

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A general approach to the displacement or position control of a nonlinear flexible structure using electrohydraulic servo actuators is developed. Our approach makes use of linear feedback of measured structural displacements plus linear feedback of the actuator control forces; a nonlinear feedforward function of the displacement command is also used for control. Based on a mathematical model of the closed loop, general conditions for closed loop stability are obtained. In the special case that the feedback is decentralized the stabilization conditions are stated in terms of simple inequalities; moreover, the stabilization conditions are robust to structural uncertainties since the conditions do not depend on explicit properties of the structure. Such robustness is a direct consequence of use of force feedback rather than, for example, acceleration feedback. Conditions are also developed for selection of the feedforward control to achieve zero steady state error; but this condition does depend on explicit properties of the structure. The theoretical results developed in the paper should provide a framework for advanced applications of control of mechanical systems using electrohydraulic servo-actuators.
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Aziz, Sarmad, and Gary M. Bone. "Automatic tuning of pneumatic servo actuators." Advanced Robotics 13, no. 6 (1998): 563–76. http://dx.doi.org/10.1163/156855399x01800.

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Heinken, Helge, Stephan Ulrich, Rainer Bruns, and Steffen Schneider. "High-response electrorheological servo valve." Journal of Intelligent Material Systems and Structures 31, no. 2 (2019): 297–307. http://dx.doi.org/10.1177/1045389x19873427.

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The demand of more powerful and high-dynamic hydraulic actuators gives the servo valve as a control member an increasingly important role. The valve should provide the hydraulic actuator with sufficient volume flow over wide frequency range to achieve large strains at high operating frequencies. Here, the electrorheological effect as an electrohydraulic valve drive offers great potential. It converts the electrical input signal directly into a controlling mechanical quantity within a few milliseconds and provides theoretically unlimited strain. Thus, the electrorheological effect has the ability to increase the performance of conventional hydraulic systems. This work presents a two-stage servo valve with an electrorheological pilot stage. Furthermore, it introduces a model to describe the static and dynamic properties of the system. The model is validated on the basis of measurement results.
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Valdiero, Antonio Carlos, Carla Silvane Ritter, Cláudio Fernando Rios, and Marat Rafikov. "Nonlinear Mathematical Modeling in Pneumatic Servo Position Applications." Mathematical Problems in Engineering 2011 (2011): 1–16. http://dx.doi.org/10.1155/2011/472903.

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This paper addresses a new methodology for servo pneumatic actuators mathematical modeling and selection from the dynamic behavior study in engineering applications. The pneumatic actuator is very common in industrial application because it has the following advantages: its maintenance is easy and simple, with relatively low cost, self-cooling properties, good power density (power/dimension rate), fast acting with high accelerations, and installation flexibility. The proposed fifth-order nonlinear mathematical model represents the main characteristics of this nonlinear dynamic system, as servo valve dead zone, air flow-pressure relationship through valve orifice, air compressibility, and friction effects between contact surfaces in actuator seals. Simulation results show the dynamic performance for different pneumatic cylinders in order to see which features contribute to a better behavior of the system. The knowledge of this behavior allows an appropriate choice of pneumatic actuator, mainly contributing to the success of their precise control in several applications.
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Kovari, Attila. "Influence of Internal Leakage in Hydraulic Capsules on Dynamic Behavior of Hydraulic Gap Control System." Materials Science Forum 812 (February 2015): 119–24. http://dx.doi.org/10.4028/www.scientific.net/msf.812.119.

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In hot rolling mills the plastic deformation of the strip is realized at high force and plastic strain speed controlled by electro-hydraulic servo actuators. These hydraulic servo actuators - hydraulic capsules – are capable to adjust the rolling gap at great rolling force dynamically. The dynamic behaviour of the rolling mill’s AGC (automatic gap adjustment) system mainly depends on the correct operation of hydraulic actuators and servo valves. These equipments are great value, planned maintenance is essential for reliable correct operation. The maintenance includes the refurbish of damaged, worn surfaces inside the cylinder and replacement of worn out seals. In the study a laboratory hydraulic positioning system was used to examine the effect of hydraulic actuator internal leakage to dynamic behaviors of the positioning system. Because the laboratory test system is similar to the hydraulic gap adjustment system therefore the laboratory test results can be extended to the rolling mill’s Hydraulic Gap Control system.
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Ranjith Pillai, R., and Ganesan Murali. "Modified PID like fuzzy servo control applied to smart actuator based miniature Parallel Robot." Journal of Intelligent & Fuzzy Systems 41, no. 1 (2021): 735–55. http://dx.doi.org/10.3233/jifs-202572.

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Miniature flexible parallel robots, popularly used for micro positioning application demands the use of non conventional actuators. Shape memory alloys (SMA) are popular smart actuators because of its light weight, integration compatibility, ease of actuation and high power density. Inclusion of shape memory alloy actuators to the parallel robot brings in control challenges due to its nonlinearity, coupling effects and cocontraction of antagonistic pair of actuators in the mechanism in order to achieve bi directional motion. In this paper, a PID like fuzzy controller is designed and applied to a nonlinear SMA spring actuator connected to a symmetric 2 DOF miniature parallel robot. The fuzzy rules are designed from the general response plot and modified to be applied to a parallel mechanism which involves cocontraction of antagonistic actuators. The paper has also presented the control and electrical circuit design used in the experimental set up. The fuzzy control is implemented in the hardware controller with model based position feedback and tested for the trajectory tracking characteristics of the end effector with disturbances. Experimental results are presented with quantitative analysis to show the effectiveness of the proposed controller in handling nonlinearities and disturbances compared to the conventional PID control and nonlinear Sliding mode control (NSMC). The test results has demonstrated the superior nature of proposed control over other controllers in the trajectory tracking with disturbances and also linearizing the hysteresis of controlled system.
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Dissertations / Theses on the topic "Servo actuators"

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Rogers, Graham George. "Modular production systems : a motion control scheme for actuators." Thesis, Loughborough University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258362.

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Ning, Shu Bone Gary M. "Theoretical and experimental study of pneumatic servo motion control systems." *McMaster only, 2004.

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Thienen, Stefan, and Thomas Gellner. "Flexible and easy to engineer servo-hydraulic actuators using 3D printing manufacturing process." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71208.

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Already since some time, Bosch Rexroth offers solutions as compact servo hydraulic actuators (SHA). Because there are lot of requests from the market, we thought about reducing the inquiry processing time and delivery time by designing a kit system for the SHA solutions. This system should be flexible enough to cover different technical solutions (e.g. cylinder), functionalities and design styles [... aus dem Text]
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Jesus, Sidney Nogueira Pereira de. "Controlador de posição linear hidro-pneumático." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-30052008-125213/.

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Nessa pesquisa é apresentada uma inovação tecnológica em aplicações de controle de posição em máquinas e/ou dispositivos: o Controlador de Posição Linear Hidro- Pneumático. Para os casos nos quais têm-se grandes esforços combinados com pequenos deslocamentos, normalmente esse trabalho é feito com o uso de Sistemas Servo-Hidráulcos nos quais, devido às características mencionadas do nicho de mercado visado pela presente proposta, representam um custo elevado quando comparado com a solução Hidro-Pneumática aqui descrita. Salienta-se a simplicidade da infra-estrutura requerida para a instalação dessa alternativa, e também a redução do desperdício energético com relação à tecnologia tradicional com a Servo-Hidráulica. Observou-se nos testes com o protótipo, um excelente desempenho do sistema em termos de rapidez de resposta, como ainda no quesito resolução de posicionamento cujos valores encontrados apresentam-se na casa de 0,05 segundos e 0,01 mm, respectivamente. O pequeno tamanho físico obtido com essa nova tecnologia é outro item relevante, permitindo-se o seu emprego em locais de reduzido espaço disponível. . Resultados de simulações numéricas e de testes experimentais são apresentadas, bem como perspectivas de desenvolvimentos futuros.<br>This research presents a technological innovation for applications in machine / device position control: the Hydro-Pneumatic Linear Position controller. In cases where great efforts are combined with small dislocations, this task is normally accomplished by means of Servo Hydraulic Systems that, due to particular characteristics of the market envisaged by the present proposition, represent elevated costs, when compared to those of the hydro-pneumatic solution described here. This work presents an analytical numerical model for the devise as well as an experimental prototype. It worth noting the infra-structure simplicity required for this alternative implementation, and also the reduction in energy waste when compared to the traditional servo-hydraulic technology. The prototype experimental tests demonstrated the system excellent behavior in what concerns answer speed and position resolution whose values were respectively in range 0.05 s and 0,01 mm. The small physical size obtained with this technology is another relevant item, which allows the device use in places of reduced available space. Numerical simulation and experimental test results are presented as well as perspectives of future developments
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Hochwallner, Martin. "On Motion Control of Linear Incremental Hydraulic Actuators." Doctoral thesis, Linköpings universitet, Industriell Produktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-142264.

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Linear Incremental Hydraulic Actuators combine one or more short-stroke cylinders, and two or more engaging/disengaging mechanisms into one actuator with long, medium, or even unlimited stroke length. The motion of each single short-stroke actuator concatenated by the engaging/disengaging mechanisms forms the motion of the linear incremental hydraulic actuator. The patterns of how these motions are concatenated form the gaits of a specific linear incremental hydraulic actuator. Linear incremental hydraulic actuators may have more than one gait. In an application, the gaits may be combined to achieve optimal performance at various operating points. The distinguishing characteristic of linear incremental hydraulic actuators is the incremental motion. The term incremental actuator is seen as analogous to the incremental versus absolute position sensor. Incremental actuators realize naturally relative positioning. Incremental motion means also that the behavior does not depend on an absolute position but only on the relative position within a cycle or step. Incremental actuators may realize discrete incremental or continuous incremental motion. Discrete incremental actuators can only approach discrete positions, whereby stepper drives are one prominent example. In contrast, continuous incremental actuators may approach any position. Linear electric motors are one example of continuous incremental actuators. The actuator has no inherent limitation in stroke length, as every step or cycle adds only to the state at the beginning of the step or cycle and does not depend on the absolute position. This led to the alternative working title Hydraulic Infinite Linear Actuator. Linear incremental hydraulic actuator provides long stroke, high force, and linear motion and has the potential to decrease the necessary resource usage, minimize environmental impact, e.g. from potential oil spillage, extend the range of feasible products: longer, stiffer, better, etc. This thesis presents an analysis of the characteristics and properties of linear incremental hydraulic actuators as well as the gaits and possible realizations of some gaits. The gait for continuous, smooth motion with two cylinders is comprehensively studied and a control concept for the tracking problem is proposed. The control concept encapsulates the complexity of the linear incremental hydraulic actuator so that an application does not have to deal with it. One other gait, the ballistic gait, which realizes fast, energy-efficient motion, enabling energy recuperation is studied.
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Oliver, Danielle Simonette. "Power Requirements of Control Surface Actuators Towards Active Aeroelastic Control Using the Method of Receptances." Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami159601703575348.

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Thomas, Michael Brian. "Advanced servo control of a pneumatic actuator." Connect to this title online, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1070373448.

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Thesis (Ph. D.)--Ohio State University, 2003.<br>Title from first page of PDF file. Document formatted into pages; contains xix, 222 p.; also includes graphics (some col.) Includes bibliographical references (p. 215-222). Available online via OhioLINK's ETD Center
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Ozturan, Ahmet. "Modeling And Experimental Evaluation Of An Electrohydraulic Pitch Trim Servo Actuator." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614156/index.pdf.

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The pitch trim actuator is a hydraulic powered electro-mechanical flight control device of UH-60 helicopters which converts a mechanical input and an electrical command into a mechanical output with trim detent capabilities. In this thesis study, pitch trim actuator is investigated and a mathematical model is developed. From these mathematical equations, the actuator is modeled in MATLAB Simulink environment. While constructing the mathematical model, pressure losses in hydraulic transmission lines and compressibility of hydraulic oil are considered. To achieve a more realistic model for valve torque motor, particular tests are carried out and the torque motor current gain and the stiffness of torque motor flexure tube and the flapper displacement are obtained. Experimental data to verify the Simulink model is acquired with KAM-500 data acquisition system. A test fixture is designed for acquiring the experimental data. This test fixture can also be used to test the pitch trim actuator during depot level maintenance and overhaul. To verify the consistency of Simulink model, acquired experimental data is implemented in Simulink environment. The output of Simulink model simulation and the experimental data are compared. The results of comparison show that the model is good enough to simulate the steady state behavior of the actuator.
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Prechtl, Eric Frederick. "Development of a piezoelectric servo-flap actuator fro helicopter rotor control." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11731.

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Sverzuti, Victor. "Sistema de posicionamento manual servo-assistido por freio." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-30122014-110151/.

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Máquinas manuais são utilizadas em diversos processos, como na usinagem mecânica. Apesar da existência de máquinas automatizadas, com boa precisão e conformidade, as máquinas manuais de usinagem possuem baixo custo inicial e alta flexibilidade de produção, sendo empregadas para produção de lotes pequenos ou peças únicas, como protótipos ou peças empregadas em pesquisas científicas. O operador humano possui mais flexibilidade que qualquer sistema automatizado por ter a capacidade de tomar decisões. O posicionamento da ferramenta de usinagem através de uma mesa linear com parafuso e porca, acionada manualmente com um manípulo, exige perícia do operador e impacta no custo final das peças produzidas. Um dispositivo robótico acoplado ao mecanismo de posicionamento poderia trabalhar em cooperação com o operador humano, sendo utilizado como um recurso optativo para auxiliá-lo na tarefa de posicionamento. Atuadores passivos do tipo freio são seguros para a manipulação humana direta e naturalmente estáveis ao manter uma posição estática, além de baratos e simples. Sendo controlado por computador e com a posição desejada facilmente programável, o freio eliminaria a preocupação do operador com o posicionamento crítico, permitindo concentrar-se em outros detalhes do trabalho de usinagem ao delegar a tarefa de posicionamento ao freio. Literatura ou índices de desempenho escassos e iniciais foram encontrados sobre a utilização de freios neste contexto. Desta forma, este trabalho estuda os mecanismos típicos de máquinas manuais de usinagem e de freios por atrito, propondo então algoritmos de controle e avaliando seu desempenho. Desenvolveu-se dois tipos de controladores para lidar com as fortes não linearidades do atrito e fatores estocásticos do mesmo: um primeiro que utiliza pré-alimentação de um modelo do atuador e um segundo que tenta diminuir a influência de perturbações no posicionamento final diminuindo a velocidade do sistema nas imediações da posição desejada de frenagem. Um protótipo foi montado e permitiu avaliar experimentalmente os algoritmos, que apresentaram bons índices de desempenho que confirmam seu potencial de utilização, baseados em trabalhos anteriores e normas técnicas de tolerâncias gerais.<br>Manual machines are those with minimum or non-existent automation, being employed in many processes, like in the mechanical machining, where the operator have the task to position a machining tool to manufacture pieces. Despite the existence of automated machines, with good precision and production regularity in its produced pieces, the manual machines has low initial cost and high production flexibility, being used for the production of small or unique batches, like prototypes or pieces for scientific research. The human operator has greater flexibility than any automated system as it has the ability to make decisions. The positioning of the machining tool, thru a linear work table with screw and nut, manually operated by a hand wheel, requires operator skills which impacts the final cost of the manufactured pieces. A robotic device coupled to the positioning mechanism would work in cooperation with the human operator, being used as a resource to help with the task of positioning. Passive actuators, like brakes, are safe for human direct manipulation and naturally stable to maintain a position, despite being simple and cheap. Being computer-controlled, with the desired position easily programmable, the brake would eliminate the operators worry with the positioning task, leaving it to the brake. This work studies typical machine mechanisms of manual machines and friction brakes, leading to the development and evaluation of control algorithms. Two main types of feedback controllers were developed to deal with the brakes hard nonlinearities of friction and stochastic factors: one that uses a feedforward model to compensate for modeled disturbances and a second that tries to lower the disturbances influence by lowering the velocity nearby the desired position. A prototype were built and allowed to experimentally evaluate the proposed algorithms, which presented good performance in relation to early works and tolerance standards.
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Books on the topic "Servo actuators"

1

Ramakrishna, P. Developments of water hydraulic servo actuators. Bhabha Atomic Research Centre, 2004.

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Shaver, Charles. Development of an interface for an ultrareliable fault-tolerant control system and an electronic servo-control unit. National Aeronautics and Space Administration, Ames Research Center, 1986.

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The 2006-2011 World Outlook for Aerospace-Type Linear and Rotary Electrical-Input Hydraulic Servo-Actuator Assemblies. Icon Group International, Inc., 2005.

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The 2006-2011 World Outlook for Aerospace-Type Linear and Rotary Mechanical-Input Hydraulic Servo-Actuator Assemblies. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Aerospace-Type Linear and Rotary Electrical-Input Hydraulic Servo-Actuator Assemblies. ICON Group International, Inc., 2006.

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Parker, Philip M. The 2007-2012 World Outlook for Aerospace-Type Linear and Rotary Mechanical-Input Hydraulic Servo-Actuator Assemblies. ICON Group International, Inc., 2006.

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Book chapters on the topic "Servo actuators"

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Uchino, Kenji. "Servo Displacement Transducer Applications." In Piezoelectric Actuators and Ultrasonic Motors. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4613-1463-9_7.

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Stückler, Jörg, and Sven Behnke. "Compliant Task-Space Control with Back-Drivable Servo Actuators." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-32060-6_7.

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Zhu, Xinglong, Jiping Zhou, and Jianhua Zhou. "Optimization Design of Hydraulic Servo Actuators with 3-D.O.F. and Motion Decoupling." In Perspectives from Europe and Asia on Engineering Design and Manufacture. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2212-8_45.

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Angelov, Ilcho, Konstantin Kamberov, Alexander Mitov, and Tsvetozar Ivanov. "Implementation of Piezoelectric Actuators for Pilot Valve of High Response Hydraulic Servo Valve." In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23976-3_28.

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Hirose, S., K. Ikuta, and Y. Umetani. "A New Design Method of Servo-actuators Based on the Shape Memory Effect." In Theory and Practice of Robots and Manipulators. Springer US, 1985. http://dx.doi.org/10.1007/978-1-4615-9882-4_36.

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Chen, Ben M., Tong H. Lee, and Venkatakrishnan Venkataramanan. "Design of a Piezoelectric Actuator System." In Hard Disk Drive Servo Systems. Springer London, 2002. http://dx.doi.org/10.1007/978-1-4471-3712-2_8.

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Chen, Ben M., Tong H. Lee, and Venkatakrishnan Venkataramanan. "Track Following of a Single-Stage Actuator." In Hard Disk Drive Servo Systems. Springer London, 2002. http://dx.doi.org/10.1007/978-1-4471-3712-2_6.

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Chen, S. T., B. Z. Chen, and J. J. Tsai. "A PLC-based pseudo-servo hydraulic actuator system." In Computer Applications in Production Engineering. Springer US, 1995. http://dx.doi.org/10.1007/978-0-387-34879-7_78.

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Buciakowski, Mariusz, and Marcin Witczak. "Adaptive Actuator Fault Estimation for DC Servo Motor." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-23180-8_9.

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Schwarz, Max, and Sven Behnke. "Compliant Robot Behavior Using Servo Actuator Models Identified by Iterative Learning Control." In RoboCup 2013: Robot World Cup XVII. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-44468-9_19.

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Conference papers on the topic "Servo actuators"

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Mišljen, Petar, Miloš Pavić, Nikola Radostavljević, and Katarina Nestorović. "Continuous Controlling of Electro-Pneumatical Servo Actuators." In 32nd International Congress on Process Engineering. Union of Mechanical and Electrotechnical Enigeers and Technicans of Serbia (SMEITS), 2019. http://dx.doi.org/10.24094/ptk.019.32.1.83.

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Banfield, Ilka, Roque J. Saltaren, Lisandro J. Puglisi, and Rafael Aracil Santonja. "Hybrid Position-Force Control of Climbing Parallel Robot Using Electrohydraulic Servo Actuators." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48349.

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An Hybrid Position-Force control scheme for hydraulic actuators is proposed for a Climbing Parallel Robot (CPR) based on a Stewart-Gough mechanism. The hydraulics actuators are modeled, and expressed as state-space variables. The parameter identification is based on experimental data and the box-grey identification procedure, using a minimization prediction error criterion. A cascade control strategy with feedback linearization and state estimation based on two control loops is used for each hydraulic actuator. The control strategy proposed for the hydraulic actuator is implemented in a real prototype, considering a position tracking task. The model of the actuators are included in the dynamic model of the CPR obtained via the virtual work formulation, which considers the thirteen bodies that composes the Stewart-Gough robot. The proposed controller is simulated and implemented on the CPR to test the limits of its performance and the real effects of friction. The results obtained from simulation and experiments are presented and discussed.
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Dinca, Liviu, and Jenica Ileana Corcau. "Fuzzy logic controllers for electro-hydraulic servo-actuators." In 2012 International Conference on Applied and Theoretical Electricity (ICATE). IEEE, 2012. http://dx.doi.org/10.1109/icate.2012.6403462.

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Hirayama, T., K. Sasaki, R. Mizuno, et al. "Pneumatic Servo Bearing Actuator for Ultraprecise Positioning: Basic Performances of Prototype Model." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44101.

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Advances in various areas of precision mechanics, such as semi-conductor manufacturing equipment, MEMS/NEMS, biomechanics, nano-imprint and nano-technology, have required ultraprecise positioning techniques with nanometer scale accuracy to be developed. To meet such specific needs, many different kinds of actuator capable of ultraprecise motions have recently been produced. However, each actuator has some inherent problems; for example, actuators containing piezoelectric elements have been reported to cause hysteresis errors, thermal drifts, deterioration, and destruction. Based on this background, highly reliable and accurate actuators are strongly required.
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Meyer, Klaus. "The Importance of LVDT Calibration in Servo Hydraulic Actuators." In SAE World Congress & Exhibition. SAE International, 2009. http://dx.doi.org/10.4271/2009-01-0075.

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Martinez-Rosas, Juan C., Luis Alvarez-Icaza, and Daniel Noriega-Pineda. "Dynamic friction compensation in velocity control of servo-actuators." In 2009 IEEE International Conference on Control Applications (CCA). IEEE, 2009. http://dx.doi.org/10.1109/cca.2009.5281001.

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Martens, Mirco, Thomas Seel, and Ivo Boblan. "A Decoupling Servo Pressure Controller for Pneumatic Muscle Actuators." In 2018 23rd International Conference on Methods & Models in Automation & Robotics (MMAR). IEEE, 2018. http://dx.doi.org/10.1109/mmar.2018.8486045.

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Govindarajan, Ramesh K., and Giri Venkataramanan. "Servo control of solenoid actuators using augmented feedback linearization." In 2017 IEEE 18th Workshop on Control and Modeling for Power Electronics (COMPEL). IEEE, 2017. http://dx.doi.org/10.1109/compel.2017.8013284.

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Wu, Lianjun, and Yonas Tadesse. "Humanoid Robot Hand With SMA Actuators and Servo Motors." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39326.

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This paper describes the design of a child humanoid robot hand with SMA actuators and servo motors. Human hands can grasp and manipulate complicated objects relying on its flexible structure and real-time control. However, it is difficult to replicate an exact human hand using rigid structures because of intricate biomechanical structure. In human hand, one metacarpal and three phalanges make up each finger, except for the thumb which only has two phalanges. Each finger except the thumb is composed of 3 joints: the metacarpophalangeal (MCP), the proximal interphalangeal (PIP) and distal interphalangeal joints (DIP). The DIP and PIP joints are always moving simultaneously, while the MCP joint can move independently. The child-sized robot hand is developed which replicates a seven year-old child’s hand in its fundamental structure. The robot hand has five fingers and all the fingers consist of 3 links. Servo motors and shape memory alloy actuators were used as a drive mechanism for the fingers and mathematical model of the SMA actuators are described to study the finger dynamics. A prototype humanoid robot hand was fabricated using 3D printing techniques and experimental results are presented.
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Bybee, J. L. "Computer Aided Diagnostic Testing of Installed Flight Control Servo- Actuators." In Aerospace Technology Conference and Exposition. SAE International, 1993. http://dx.doi.org/10.4271/932584.

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Reports on the topic "Servo actuators"

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Montesanti, Richard Clement. High Bandwidth Rotary Fast Tool Servos and a Hybrid Rotary/Linear Electromagnetic Actuator. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/891383.

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