Relevant bibliographies by topics / Binary Actuation

Academic literature on the topic 'Binary Actuation'

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Published: 4 June 2021
Last updated: 21 February 2023

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Journal articles on the topic "Binary Actuation"

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Zhao, Yuejun, Fangjie Liu, and Chuan-Hua Chen. "Thermocapillary actuation of binary drops on solid surfaces." Applied Physics Letters 99, no. 10 (September 5, 2011): 104101. http://dx.doi.org/10.1063/1.3632041.

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Ottaviano, E., G. Carbone, and M. Ceccarelli. "Workspace analysis and performance of a binary actuated parallel manipulator with flexural joints." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 217, no. 3 (March 1, 2003): 313–30. http://dx.doi.org/10.1243/095440603762869984.

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In this paper the design of a miniaturized parallel architecture is investigated in terms of basic performances concerning mobility and workspace characteristics. The miniature requirements have been achieved with a milli-scaled parallel manipulator requiring flexural joints and binary actuation with shape memory alloy wires or small pneumatic pistons. The mechanical design is analysed by considering the mobility of the flexural joints in order to size them and model the kinematics of the joints. The reachability is analysed through a suitable formulation of the direct kinematics by also taking into account binary actuation. Workspace performance has been determined in terms of position and orientation capabilities.
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Owusu-Danquah, Josiah S., and Atef F. Saleeb. "Detwinning of preloaded martensite in shape memory alloys and its effect on the cyclic behavior of NiTi cylindrical actuators." Journal of Intelligent Material Systems and Structures 28, no. 19 (May 3, 2017): 2835–52. http://dx.doi.org/10.1177/1045389x17704062.

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A multi-mechanism material model is used to investigate the effect of the degree of martensitic detwinning/reorientation occurring at the end of mechanical preloading, on the performance of shape memory tubular and solid cylindrical actuators. A high-temperature ternary Ni50.3Ti29.7Hf20 alloy, showing almost complete transformation behavior, and an ordinary binary Ni49.9Ti50.1 material, depicting incomplete martensitic transformation, are used. The results indicated a clear correlation between the shape memory cyclic actuation behavior and the martensitic deformation character of the selected alloy. More specifically, while the actuation strokes produced by the Ni50.3Ti29.7Hf20 systems consistently followed a direct pattern for the different geometries and torque magnitudes, the results for the Ni49.9Ti50.1 cases indicated a behavior that is counterintuitive to what may be expected under pure mechanical loading conditions. In particular, when subjected to the same, high preload torques, Ni49.9Ti50.1 solid actuator under lesser stresses generated higher twist strokes than a tubular counterpart experiencing higher stresses.
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Chirikjian, G. S. "Kinematic Synthesis of Mechanisms and Robotic Manipulators With Binary Actuators." Journal of Mechanical Design 117, no. 4 (December 1, 1995): 573–80. http://dx.doi.org/10.1115/1.2826721.

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Binary actuators have only two discrete states (denoted “0” and “1”), both of which are stable without feedback. As a result, binary mechanisms and manipulators have a finite number of states. Major benefits of binary actuation are that extensive feedback control is not required, task repeatability can be very high, and two-state actuators are generally very inexpensive (e.g., solenoids, pneumatic cylinders, etc.), thus resulting in low cost robotic mechanisms. This paper develops algorithms for the optimal synthesis of binary manipulators and mechanisms for discrete tasks such as pick-and-place operations.
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Bonfante, G., T. Roux-Marchand, M. C. Audry-Deschamps, L. Renaud, P. Kleimann, A. Brioude, and M. Maillard. "Polarization mechanisms of dielectric materials at a binary liquid interface: impacts on electrowetting actuation." Physical Chemistry Chemical Physics 19, no. 44 (2017): 30139–46. http://dx.doi.org/10.1039/c7cp06052a.

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Kunti, Golak, Anandaroop Bhattacharya, and Suman Chakraborty. "Alternating current electrothermal modulated moving contact line dynamics of immiscible binary fluids over patterned surfaces." Soft Matter 13, no. 37 (2017): 6377–89. http://dx.doi.org/10.1039/c7sm00684e.

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In this paper, we report the results of our numerical study on incompressible flow of a binary system of two immiscible fluids in a parallel plate capillary using alternating current electrothermal kinetics as the actuation mechanism for flow.
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Giacobassi, Cassie A., Daniela A. Oliveira, Cicero C. Pola, Dong Xiang, Yifan Tang, Shoumen Palit Austin Datta, Eric S. McLamore, and Carmen L. Gomes. "Sense–Analyze–Respond–Actuate (SARA) Paradigm: Proof of Concept System Spanning Nanoscale and Macroscale Actuation for Detection of Escherichia coli in Aqueous Media." Actuators 10, no. 1 (December 23, 2020): 2. http://dx.doi.org/10.3390/act10010002.

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Foodborne pathogens are a major concern for public health. We demonstrate for the first time a partially automated sensing system for rapid (~17 min), label-free impedimetric detection of Escherichia coli spp. in food samples (vegetable broth) and hydroponic media (aeroponic lettuce system) based on temperature-responsive poly(N-isopropylacrylamide) (PNIPAAm) nanobrushes. This proof of concept (PoC) for the Sense-Analyze-Respond-Actuate (SARA) paradigm uses a biomimetic nanostructure that is analyzed and actuated with a smartphone. The bio-inspired soft material and sensing mechanism is inspired by binary symbiotic systems found in nature, where low concentrations of bacteria are captured from complex matrices by brush actuation driven by concentration gradients at the tissue surface. To mimic this natural actuation system, carbon-metal nanohybrid sensors were fabricated as the transducer layer, and coated with PNIPAAm nanobrushes. The most effective coating and actuation protocol for E. coli detection at various temperatures above/below the critical solution temperature of PNIPAAm was determined using a series of electrochemical experiments. After analyzing nanobrush actuation in stagnant media, we developed a flow through system using a series of pumps that are triggered by electrochemical events at the surface of the biosensor. SARA PoC may be viewed as a cyber-physical system that actuates nanomaterials using smartphone-based electroanalytical testing of samples. This study demonstrates thermal actuation of polymer nanobrushes to detect (sense) bacteria using a cyber-physical systems (CPS) approach. This PoC may catalyze the development of smart sensors capable of actuation at the nanoscale (stimulus-response polymer) and macroscale (non-microfluidic pumping).
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Scheidl, Rudolf, and Simon Mittlböck. "A mathematical analysis of a hydraulic binary counter for hydraulic exoskeleton actuation." International Journal of Hydromechatronics 1, no. 2 (2018): 153. http://dx.doi.org/10.1504/ijhm.2018.092724.

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Mittlböck, Simon, and Rudolf Scheidl. "A mathematical analysis of a hydraulic binary counter for hydraulic exoskeleton actuation." International Journal of Hydromechatronics 1, no. 2 (2018): 153. http://dx.doi.org/10.1504/ijhm.2018.10014038.

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Ottaviano, E., M. Ceccarelli, J. Di Giorgio, and M. Varone. "Design and Evaluation of a Discretely Actuated Multi-Module Parallel Manipulator." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 220, no. 4 (April 1, 2006): 513–26. http://dx.doi.org/10.1243/09544062c08305.

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In this paper, a new discretely actuated spatial parallel manipulator is presented as designed with binary pneumatic actuation. It has been used as a basic module for the construction of a multi-module parallel manipulator. Major benefits of discretely actuated manipulators are high repeatability, relatively low cost, and no need for feedback control. In addition, hyper-redundancy allows executing tasks even when some actuators fail. Binary actuators can have only two stable states denoted by (0) and (1). In this paper, kinematic and static analyses have been reported to obtain design constraints that have been used to build a first prototype. A performance evaluation is carried out and the prototype has been built for experimental tests.
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Dissertations / Theses on the topic "Binary Actuation"

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Gomez, Teresa M. "Binary actuation of solar mirrors." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68528.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 42).
This thesis explores the use of binary actuators to adjust the shape of an array of mirrors. To explore this concept, an experimental system was refurbished and recalibrated. This experimental system was used to explore the range of possible configurations that could be reached by a simple binary actuated system. System models are required for accurate control of these binary actuated structures. This thesis develops and tests the accuracy of two different modeling approaches, linear and iterative. The linear model assumes that each actuator contributes a constant value to the angle of the center mirror, and that this value is not dependent on the other actuator positions. The actuator contributions are summed to find the angle of the center mirror. These contributions are found two ways: by taking a relevant single data point for each actuator, and by using a least squares fitting of a large subset of data. The iterative model assumes that each actuator adds some constant value, similar to the previous model, and that it also adds some portion of the current angle. A multiplication and shift are therefore found for each actuator, and these multiplications and shifts successively applied, starting with the initial angles, to find the final angular position. While the linear model with measured values for the actuator contributions predicted the data poorly, the linear model with the least squares fitted values performed much better. The iterative model initially produced large errors, but these errors were found to be readily correctable and once removed, the iterative model predicted the data better than the linear model.
by Teresa M. Gomez.
S.B.
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Küc̦ük, Artun C. "Bipedal locomotion ; a binary-decision approach to its control and actuation." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63363.

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Yang, Po-hua. "Design and control of bundles of binary actuators for manipulator actuation /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486400446365734.

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Bayram, Atilla. "Modeling And Control Of A Hyper Redundant Manipulator." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611653/index.pdf.

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The hyper redundant manipulators (HRMs) have excessively large degrees of freedom. As a special but practicable subset, the binary HRMs use binary (on-off) actuators with only two stable states such as pneumatic cylinders and solenoids. Such actuators are simple, cheap, and easy to control. Therefore, a binary HRM has been studied in this thesis. The thesis work covers the conceptual design of a spatial binary HRM together with its controlled motion simulations. The manipulator consists of many modules, each of which has the same constructive characteristics and consists of three submodules which are two cascaded variable geometry truss structures working in mutually orthogonal planes and a discrete twister. The manipulator is assumed to be powered with pneumatic on-off actuators. Because of the discrete nature of the binary actuators, a small but continuously actuated manipulator with six degrees of freedom is installed as the last module of the HRM in order to compensate the discretization errors. To solve the inverse kinematics problem of the HRM, three methods have been presented. These are the spline fitting, the extended spline fitting, and the workspace filling methods. The spline fitting method is based on forcing the spine (i.e. the center line) of the manipulator to approximate a spatial reference spline which is specified as a desired curve. In the extended spline fitting method, the result found in the first method is improved by using a genetic algorithm. In the work space filling method, the workspace of the manipulator is filled randomly with a sufficiently large finite number of discrete configurational samples. If it is desired to have concentration on a particular region of the work space, then that region is filled by using a genetic algorithm. After the filling stage, the sample closest to the desired configuration is determined by a suitable search algorithm. Finally, in order to simulate the motion of the HRM between two successive configurational steps, the equations of motions of the HRM are obtained in terms of the pressure forces generated by the binary pneumatic actuators. Then, the necessary simulations are carried out to demonstrate the performance of the HRM in some typical applications.
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Daverman, R. Dodge (Robert Dodge). "A novel binary actuator using shape memory alloy." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32363.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.
Includes bibliographical references (p. 95-96).
In situations that demand the use of the high-bandwidth, high-quality sense of vision for interactions with the physical world it would be beneficial to have a wearable tactile display that takes advantage of touch to communicate information to the user without causing visual distractions. This thesis presents the design and development of a novel actuator that can be configured into thin, flexible arrays to meet this need for wearable tactile displays. The actuator presented uses the strain recovery property of the martensitic transformation of Nitinol, a Shape Memory Alloy (SMA), to generate the actuation force. A compliant bistable mechanism provides the restoring force that pre- strains the martensitic Nitinol, and thus makes the actuator binary. Binary actuation alleviates some of the problems that would otherwise limit the effectiveness of Nitinol in wearable haptic systems. To increase the potential for commercial success, manufacturability issues are considered throughout the development cycle to ensure the potential for economical large scale production. The paper concludes with the presentation of three different prototypes. Their successes and failures are discussed along with recommendations for future work.
by R. Dodge Daverman.
S.M.
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Selden, Brian A. 1980. "Segmented binary control of shape memory actuator systems." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30307.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.
Includes bibliographical references (p. 51).
A new approach to the design and control of shape memory alloy (SMA) actuators is presented. SMA wires are divided into many segments and their thermal states are controlled individually as a group of finite state machines. Instead of driving a current to the entire SMA wire and controlling the wire length based on the analogue strain-temperature characteristics, the new method controls the binary state (hot or cold) of individual segments and thereby the total displacement is proportional to the length of the heated segments, i.e. austenite phase. Although the thermo-mechanical properties of SMA are highly nonlinear and uncertain with a prominent hysteresis, Segmented Binary Control is robust and stable, providing characteristics similar to a stepping motor. However, the heating and cooling of each segment to its bi-stable states entail longer time and larger energy for transition. An efficient method for improving speed of response and power consumption is developed by exploiting the inherent hysteresis of SMA. Instead of keeping the extreme temperatures continuously, the temperatures return to intermediate "hold" temperatures closer to room temperature but sufficient to keep constant phase. Coordination of the multitude of segments having independent thermal states allows for faster response with little latency time even for thick SMA wires. Based on stress dependent thermo-mechanical characteristics, the hold temperature satisfying a given Stress Margin is obtained. The new control method is implemented using the Peltier effect thermoelectric devices for selective segment-by-segment heating and cooling. Experiments demonstrate effectiveness of the proposed method.
by Brian A. Selden.
S.M.
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Abolfathi, Peter Puya. "Development of an Instrumented and Powered Exoskeleton for the Rehabilitation of the Hand." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/3690.

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With improvements in actuation technology and sensory systems, it is becoming increasingly feasible to create powered exoskeletal garments that can assist with the movement of human limbs. This class of robotics referred to as human-machine interfaces will one day be used for the rehabilitation of paralysed, damaged or weak upper and lower extremities. The focus of this project was the development of an exoskeletal interface for the rehabilitation of the hands. A novel sensor was designed for use in such a device. The sensor uses simple optical mechanisms centred on a spring to measure force and position simultaneously. In addition, the sensor introduces an elastic element between the actuator and its corresponding hand joint. This will allow series elastic actuation (SEA) to improve control and safely of the system. The Hand Rehabilitation Device requires multiple actuators. To stay within volume and weight constraints, it is therefore imperative to reduce the size, mass and efficiency of each actuator without losing power. A method was devised that allows small efficient actuating subunits to work together and produce a combined collective output. This work summation method was successfully implemented with Shape Memory Alloy (SMA) based actuators. The actuation, sensory, control system and human-machine interface concepts proposed were evaluated together using a single-joint electromechanical harness. This experimental setup was used with volunteer subjects to assess the potentials of a full-hand device to be used for therapy, assessment and function of the hand. The Rehabilitation Glove aims to bring significant new benefits for improving hand function, an important aspect of human independence. Furthermore, the developments in this project may one day be used for other parts of the body helping bring human-machine interface technology into the fields of rehabilitation and therapy.
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Abolfathi, Peter Puya. "Development of an Instrumented and Powered Exoskeleton for the Rehabilitation of the Hand." University of Sydney, 2008. http://hdl.handle.net/2123/3690.

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Doctor of Philosophy (PhD)
With improvements in actuation technology and sensory systems, it is becoming increasingly feasible to create powered exoskeletal garments that can assist with the movement of human limbs. This class of robotics referred to as human-machine interfaces will one day be used for the rehabilitation of paralysed, damaged or weak upper and lower extremities. The focus of this project was the development of an exoskeletal interface for the rehabilitation of the hands. A novel sensor was designed for use in such a device. The sensor uses simple optical mechanisms centred on a spring to measure force and position simultaneously. In addition, the sensor introduces an elastic element between the actuator and its corresponding hand joint. This will allow series elastic actuation (SEA) to improve control and safely of the system. The Hand Rehabilitation Device requires multiple actuators. To stay within volume and weight constraints, it is therefore imperative to reduce the size, mass and efficiency of each actuator without losing power. A method was devised that allows small efficient actuating subunits to work together and produce a combined collective output. This work summation method was successfully implemented with Shape Memory Alloy (SMA) based actuators. The actuation, sensory, control system and human-machine interface concepts proposed were evaluated together using a single-joint electromechanical harness. This experimental setup was used with volunteer subjects to assess the potentials of a full-hand device to be used for therapy, assessment and function of the hand. The Rehabilitation Glove aims to bring significant new benefits for improving hand function, an important aspect of human independence. Furthermore, the developments in this project may one day be used for other parts of the body helping bring human-machine interface technology into the fields of rehabilitation and therapy.
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Book chapters on the topic "Binary Actuation"

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Plante, Jean-Sébastien, and Steven Dubowsky. "The Calibration of a Parallel Manipulator with Binary Actuation." In Advances in Robot Kinematics: Analysis and Design, 391–98. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8600-7_41.

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Plante, Jean-Sébastien, and Steven Dubowsky. "BINARY ACTUATION." In Dielectric Elastomers as Electromechanical Transducers, 270–78. Elsevier, 2008. http://dx.doi.org/10.1016/b978-0-08-047488-5.00026-5.

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Spaggiari, A., G. Scire, and E. Dragoni. "Optimum Mechanical Design of Binary Actuators Based on Shape Memory Alloys." In Smart Actuation and Sensing Systems - Recent Advances and Future Challenges. InTech, 2012. http://dx.doi.org/10.5772/50147.

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Conference papers on the topic "Binary Actuation"

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Plante, Jean-Se´bastien, Matthew Santer, Steven Dubowsky, and Sergio Pellegrino. "Compliant Bistable Dielectric Elastomer Actuators for Binary Mechatronic Systems." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85576.

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In this paper, a new all-polymer actuation approach for binary mechatronic systems is demonstrated. The technology consists of using Dielectric Elastomer actuators in a binary fashion by coupling them with a properly designed compliant structure. Here, a bistable actuator based around the “flip-flop” concept is implemented in which two antagonistic actuators switch a compliant truss between two stable positions. This prototype shows promising performance with output forces ranging from 1 to 3.5 N and displacements of 30% of the actuator dimension.
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Mathijssen, Glenn, Raphael Furnemont, Elias Saerens, Dirk Lefeber, and Bram Vanderborght. "Discrete binary muscle-inspired actuation with motor unit overpowering and binary control strategy." In 2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). IEEE, 2017. http://dx.doi.org/10.1109/iros.2017.8206029.

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Lee, Seung J., Amy M. Bilton, and Steven Dubowsky. "On the Kinematics of Solar Mirrors Using Massively Parallel Binary Actuation." In ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-28875.

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Precision mirrors are required for effective solar energy collectors. Manufacturing such mirrors and making them robust to disturbances such as thermal gradients is expensive. In this paper, the use of parallel binary actuation to control the shape of mirrors for solar concentrators is explored. The approach embeds binary actuators in a compliant mirror substructure. Actuators are deployed in a specified pattern to correct the mirror shape. The analysis for binary-actuated compliant mirror structures is presented. Analytical models are developed for one-dimensional and two-dimensional compliant structures with embedded binary actuators. These analytical models are validated using finite element analysis and experimental studies. The models and experiments demonstrate the capabilities of binary actuated mirrors. System workspace is explored, the principle of superposition required for their control is demonstrated, as is the mirror ability to correct its figure.
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Huo, Qiong, Bo Dong, and Subir Biswas. "Self-organized pulse switching for binary sensing and actuation." In SPIE Defense, Security, and Sensing, edited by Sohail A. Dianat and Michael D. Zoltowski. SPIE, 2013. http://dx.doi.org/10.1117/12.2017975.

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Sun, Shufeng. "Research of Nanometer Positioning Stage With Six Degree of Freedom Based on Binary Actuation Principle." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21429.

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To adapt the miniaturized development tendency of nanometer positioning devices, a new type of micro-displacement stage with six degree of freedom, which can implement nanometer-level ultra-precision positioning without feedback control is designed. It takes a group of piezoelectric ceramics actuators (PZTAs) connected in series as actuation unit, takes flexure hinges as elastic guide rail. To overcome the non-linearity and hysteresis of PZTAs, binary actuation principle is adopted to control a group of actuators that work together to output many discrete, repeatable displacements. If these displacements are distributed within a scope of several microns, only simple on and off actuator commands may obtain nanometer-level repeatable positioning without feedback control. Theoretical calculation and finite element analysis (FEA) are used to design and simulate the stage. Expressions of rigidity and stress are obtained by theoretical calculation. FEA and experimental results verify the rationality and feasibility of the stage.
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Pikus, Aaron, Israel Sebastiao, Andrew Strongrich, and Alina Alexeenko. "DSMC simulation of microstructure actuation by Knudsen thermal forces including binary mixtures." In 30TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS: RGD 30. Author(s), 2016. http://dx.doi.org/10.1063/1.4967596.

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Lees, David S., and Gregory S. Chirikjian. "An Efficient Trajectory Planning Method for Binary Manipulators." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/mech-1161.

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Abstract Binary manipulators have actuators with only two stable states. Therefore, they can reach only a finite number of locations. Compared to a manipulator built with continuous actuators, a binary manipulator provides reasonable performance, robustness, and is relatively inexpensive (up to an order of magnitude cheaper). The number of states attainable by a binary manipulator grows exponentially with the number of actuators. This makes brute force calculation of the inverse kinematics impossible for binary manipulators with many actuators. This paper presents a combinatorial method for planning trajectories for a binary manipulator while reducing the search space to a manageable size. Despite the discrete nature of binary actuation, it also creates motions that follow a specified trajectory accurately (in both position and orientation) without large deviations of the end-effector from the specified path.
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Lee, Joshua E. Y., and Ashwin A. Seshia. "Binary Excitation of a High-Q Bulk Acoustic Microresonator by Actuation Polarity Inversion." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67695.

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We present a technique for independently exciting two resonant modes of vibration in a single-crystal silicon bulk mode microresonator using the same electrode configuration through control of the polarity of the DC actuation voltage. Applications of this technique may include built-in temperature compensation by the simultaneous selective excitation of two closely spaced modes that may have different temperature coefficients of resonant frequency. The technique is simple and requires minimum circuit overhead for implementation. The technique is implemented on square plate resonators with quality factors as high as 3.06 × 106.
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Fietzke, Benjamin, Rudibert King, Jan Mihalyovics, and Dieter Peitsch. "Binary Repetitive Model Predictive Active Flow Control Applied to an Annular Compressor Stator Cascade With Periodic Disturbances." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-58744.

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Abstract Novel pressure gain combustion concepts invoke periodic flow disturbances in a gas turbine’s last compressor stator row. This contribution presents studies of mitigation efforts on the effects of these periodic disturbances on an annular compressor stator rig. The passages were equipped with pneumatic Active Flow Control (AFC) influencing the stator blade’s suction side, and a rotating throttling disc downstream of the passages inducing periodic disturbances. For steady blowing, it is shown that with increasing actuation amplitudes Cμ, the extension of a hub corner vortex deteriorating the suction side flow can be reduced, resulting in an increased static pressure rise coefficient Cp of a passage. The effects of the induced periodic disturbances could not be addressed intrinsically, by using steady blowing actuation, Considering a corrected total pressure loss coefficient ζ*, which includes the actuation effort, the stator row’s efficiency decreases with higher cμ due to the increasing costs of the actuation mass flow. Therefore, a closed-loop approach is presented to address the effects of the disturbances more specifically, thus lowering the actuation cost, i.e., mass flow. For this, a Repetitive Model Predictive Control (RMPC) was applied, taking advantage of the periodic nature of the induced disturbances. The presented RMPC formulation is restricted to a binary control domain to account for the used solenoid valves’ switching character. An efficient implementation of the optimization within the RMPC is presented, which ensures real-time capability. As a result, Cp increases in a similar magnitude but with a lower actuation mass flow of up to 66%, resulting in a much lower ζ* for similar values of cμ.
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Mollaei, Mohammadreza, and Stephen Mascaro. "Optimal Control Algorithm for Multi-Input Binary-Segmented SMA Actuators Applied to a Multi-DOF Robot Manipulator." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-4094.

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In this paper, we present an optimal design and control algorithm for multi-input binary-segmented Shape Memory Alloy (SMA) actuator arrays applied to a multi-degree-of-freedom (DOF) robot manipulator as it tracks a desired trajectory. The multi-DOF manipulator used for this paper is a 3-DOF-robot finger. A multi-input binary-segmented SMA actuator drives each DOF. SMA wires are embedded into a compliant vessel, such that both electric and fluidic (hot/cold) input can be applied to the actuators. By segmenting the SMA actuators, each segment can be controlled in a binary fashion (fully contracted/extended) to create a set of discrete displacements for each joint of the manipulator. To design the number of segments and length of each segment, an algorithm is developed to optimize the workspace. To optimize the workspace, it is desired to have a uniform distribution of reachable points in Cartesian space. Moreover, the number of neighbors (points that can be reached just by one control command from the current configuration) and the computational cost are important in workspace optimization. Graph theory search techniques based on the A* algorithm are employed to develop the control algorithm. A path-cost function is proposed to optimize the cost, which is a combination of actuation time, energy usage, and kinematic error. The kinematic error is estimated as the deviation between the actual and desired trajectory. The performance of the search algorithm and cost function are validated through simulation.
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You might also be interested in the extended bibliographies on the topic 'Binary Actuation' for particular source types:
Journal articles
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