Relevant bibliographies by topics / Actuator Orientation

Contents

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

Academic literature on the topic 'Actuator Orientation'

Author: Grafiati
Published: 4 June 2021
Last updated: 21 February 2023

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Journal articles on the topic "Actuator Orientation"

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Wetherhold, Robert, Markus Messer, and Abani Patra. "Optimization of Directionally Attached Piezoelectric Actuators." Journal of Engineering Materials and Technology 125, no. 2 (April 1, 2003): 148–52. http://dx.doi.org/10.1115/1.1555653.

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A directionally attached piezoelectric (DAP) actuator is one method to control the twisting vibration of a plate with high authority. Although insuring proper performance for DAP actuators has been discussed in terms of the control law used, the optimization of the mechanical details of the actuator itself has received little attention. There is an interaction between the actuator and the controlled structure because more actuator material on the structure adds actuation power but also stiffens the structure. The effects of DAP actuator geometric parameters and material properties are explored in a systematic way for the case of a cantilever beam and it is shown that significant improvements in performance are possible. The material property study indicates that an optimum point exists whereby the weight and thus cost can be lowered while improving structure response by using a composite actuator. The actuator thickness, width, orientation angle, and offset from the clamped end have significant effects on structure response. In order of importance, the geometric parameters are: actuator thickness, orientation angle, width and offset. A study of the modal distribution for the structure shows that if the input disturbance that is to be suppressed is modally well characterized, the structure can be efficiently controlled by using more than one independent actuation voltage.
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Wang, Jinsong, Jun Wu, Tiemin Li, and Xinjun Liu. "Workspace and singularity analysis of a 3-DOF planar parallel manipulator with actuation redundancy." Robotica 27, no. 1 (January 2009): 51–57. http://dx.doi.org/10.1017/s0263574708004517.

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SUMMARYThis paper deals with the position workspace, orientation workspace, and singularity of a 3-degree-of-freedom (DOF) planar parallel manipulator with actuation redundancy, which is created by introducing a redundant link with active actuator to a 3-DOF nonredundant parallel manipulator. Based on the kinematic analysis, the position workspace and orientation workspace of the redundantly actuated parallel manipulator and its corresponding nonredundant parallel manipulator are analyzed, respectively. In the singularity analysis phase, the relationship between the generalized input velocity and the generalized output velocity is researched on the basis of the theory of singular value decomposition. Then a method to investigate the singularity of parallel manipulators is presented, which is used to determine the singularity of the redundantly actuated parallel manipulator. In contrast to the corresponding nonredundant parallel manipulator, the redundant one has larger orientation workspace and less singular configurations. The redundantly actuated parallel manipulator is incorporated into a 4-DOF hybrid machine tool which also includes a feed worktable to demonstrate its applicability.
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Kittinanthapanya, Rasheed, Yusuke Sugahara, Daisuke Matsuura, and Yukio Takeda. "Development of a Novel SMA-Driven Compliant Rotary Actuator Based on a Double Helical Structure." Robotics 8, no. 1 (February 18, 2019): 12. http://dx.doi.org/10.3390/robotics8010012.

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This paper proposes a new shape memory alloy (SMA)-driven compliant rotary actuator that can perform both passive and self-actuated motions. This SMA actuator is suitable as a redundant actuation part in a parallel robot joint to assist with singularity postures where the robot might lose the ability to maintain the position and orientation of the end effector. The double helical compliant joint (DHCJ) was chosen as a candidate mechanism; it can act in soft compliance with linear characteristics and a wide range of motion. The experimental results validated that the proposed model can be used to simulate the DHCJ behavior. The use of this mechanism exhibits advantages such as one-axis rotational motion, linear behavior even for a compliant mechanism, stiffness in the other axes of motion, and compact size. SMA leaves (strips) were used as actuation parts, and a single SMA leaf was tested before combining with the double helical frame as an SMA actuator. The prototype was fabricated, and necessary parameters such as deflection angle, temperature, torque, and stress–strain were collected to define the model for a controller. This actuator is controlled by a feedforward controller and provides rotational motion for both forward and reverse sides with a maximal range of 40 degrees.
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Kino, Hitoshi, Akihiro Kiyota, Nobuyoshi Miyamoto, Takumi Inadomi, Tomonori Kato, and Hiroyuki Fujioka. "Basic Study of Heating Response Measurement for Nanosheet Particle/Polymer Composite Gel Actuator with Anisotropic Contraction." Key Engineering Materials 804 (May 2019): 17–21. http://dx.doi.org/10.4028/www.scientific.net/kem.804.17.

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A soft actuator is expected to be applied in the next generation of robotics. This study focuses on soft gel actuators hybridized with nanosheet liquid crystals. The resulting soft actuator has a highly hydrophilic property, and is suitable for underwater use. When the gel in water is heated to more than the transition temperature, the gel contracts; conversely, it swells when it is cooled. This gel actuator remarkably has an anisotropic contraction characteristic because the orientation of the nanosheets is uniformly arranged. However, little is known about its dynamic characteristics of the thermal contraction. As a basic analysis, this paper investigates the heating step response through experiments, and reveals the variation of the time constant against the dimensions.
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Kang, Tey Wei, Lim Thol Yong, Yeong Che Fai, and Eileen Su Lee Ming. "Design and Development of an Omnidirectional Mobile Robot." Applied Mechanics and Materials 432 (September 2013): 494–99. http://dx.doi.org/10.4028/www.scientific.net/amm.432.494.

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Most mobile robots use differential-drive concept, where they are equipped with two actuators that permit only single-direction rotation at a time. This concept limits the robots navigation because its orientation must always change according to the direction of movement. This paper presents the development of an omnidirectional mobile robot that uses three actuators, aligned in 120 degrees separation and each attached to an omniwheel. By manipulating actuator speed, the robot can navigate to any direction without changing its orientation. UsingNIsbRIO9632xtas the main controller, navigation algorithm is implemented in LabVIEW, integrated with PID controller to fine-tune robot movements.
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Chen, Wei Hai, Liang Zhang, Fang Hong Guo, and Jing Meng Liu. "Design and Modeling of a Spherical Actuator with Three Dimensional Orientation Measurement System." Advanced Materials Research 317-319 (August 2011): 1088–97. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.1088.

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This paper presents the design and modeling of a permanent magnet spherical actuator which consists of a rotor with eight cylindrical permanent magnet (PM) poles and a stator with twenty-four air-core coils. Torque and dynamic model of this PM spherical actuator are formulated analytically. An optimal design procedure is proposed to achieve a high torque output, and significant design parameters of the actuator are discussed. As there is no effective method for three dimensional orientation measurement of the spherical actuator currently, a novel orientation measurement system is proposed. Finally, experimental works are carried out, and the experiment results demonstrate the effectiveness of the proposed orientation measurement system.
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Ericson Rajagukguk. "Perbaikan Sistem Pelacakan Panel Surya Menggunakan Penyesuaian Posisi Massa Tambahan." JURNAL TEKNIK MESIN, INDUSTRI, ELEKTRO DAN INFORMATIKA 1, no. 1 (March 12, 2022): 07–15. http://dx.doi.org/10.55606/jtmei.v1i1.463.

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This study aims to obtain an effective solar panel tracking mechanism using energy-efficient electric actuators. Furthermore, we designed and implemented a semi-active solar tracking system. A tracking system is proposed to control solar panel orientation using a moving mass, a spring system, and an actuator. The weight of the moving mass and the spring constant are optimized to reduce actuator size. A stepper motor was used for this case. This electric drive is not the prime mover of the solar tracker; hence, it works against mass elements lighter than solar panel weight as used in the active solar tracker. Experimental results suggest that the average power required by the stepper motor is 0.21% of the energy generated by the solar tracking system. The results indicate that the proposed solar panel tracker works satisfactorily to control solar panel orientation.
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Firmani, Flavio, Alp Zibil, Scott B. Nokleby, and Ron P. Podhorodeski. "FORCE-MOMENT CAPABILITIES OF REVOLUTE-JOINTED PLANAR PARALLEL MANIPULATORS WITH ADDITIONAL ACTUATED BRANCHES." Transactions of the Canadian Society for Mechanical Engineering 31, no. 4 (December 2007): 469–81. http://dx.doi.org/10.1139/tcsme-2007-0034.

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The force-moment capabilities of revolute-jointed planar parallel manipulators (PPMs) are presented. A previously developed analysis that determines explicitly the force-moment capabilities of parallel manipulators is considered and the formulation is improved. This analysis is based upon properly adjusting the actuator outputs to their maximum capabilities. The force-moment capabilities of two actuation layouts are investigated: the non-redundant 3-RRR PPM and the redundantly actuated 4-RRR PPM, where the underline indicates the actuated joint. Four studies of force-moment capabilities are presented: maximum force with a prescribed moment, maximum applicable force, maximum moment with a prescribed force, and maximum applicable moment. These studies are performed for constant payload orientation of the mobile platform throughout the manipulator’s workspace. It is concluded that the manipulator with the additional actuated branch shows an improvement of the force-moment capabilities at the expense of reducing its workspace.
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Firmani, Flavio, Alp Zibil, Scott B. Nokleby, and Ron P. Podhorodeski. "Wrench capabilities of planar parallel manipulators. Part II: Redundancy and wrench workspace analysis." Robotica 26, no. 6 (November 2008): 803–15. http://dx.doi.org/10.1017/s0263574708004396.

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SUMMARYThis part of the paper investigates the wrench capabilities of redundantly actuated planar parallel manipulators (PPMs). The wrench capabilities of PPMs are determined by mapping a hypercube from the torque space into a polytope in the wrench space. For redundant PPMs, one actuator output capability constrains the wrench space with a smaller polytope that is contained inside the overall polytope. Performance indices are derived from six study cases. These indices are employed to analyze the wrench workspace for constant orientation of the mobile platform of the non-redundant 3-RRR PPM, and actuation redundant 4-RRR and 3-RRR PPMs, where the underline indicates the actuated joints. A comparison of the results shows that both of the redundantly-actuated PPMs give better wrench capabilities than the non-redundant PPM. However, it is shown that scaled for the operational cost (wrench capabilities divided by total actuation output) the non-redundant 3-RRR PPM provides the highest maximum reachable force, the 3-RRR PPM produces the highest isotropic force, and the 4-RRR yields the highest reachable moment.
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Sokhanvar, S., A. Zabihollah, and R. Sedaghati. "INVESTIGATING THE EFFECT OF THE ORTHOTROPIC PROPERTY OF PIEZOELECTRIC PVDF." Transactions of the Canadian Society for Mechanical Engineering 31, no. 1 (March 2007): 111–25. http://dx.doi.org/10.1139/tcsme-2007-0007.

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The applications of the piezoelectric Polyvinylidene Fluoride, PVDF, integrated with the beams, plates, and membranes, performing as sensor, actuator or combination have been received considerable attention in the recent years. However, not much work has been reported on the influence of the PVDF’s orthotropic behavior, particularly the effect of the orientation of the PVDF film in the host structure, on the performance of the system. In the present study, the effect of the piezoelectric PVDF film orientation on the output voltage, the actuation force, and the dynamic response of the integrated structures has been studied using the finite element method. In the sensory mode, the difference between the output voltages obtained from the biaxial piezoelectric PVDF film and uniaxial one, when the orientation of the film varies from 0 to 90 degree, is investigated. In each case the proportion contributions of the involved piezoelectric coefficients including d31, d32 and are studied. Alternatively, in the actuation mode, the effect of orthotropic behavior of the actuator on the nodal displacements has been taken into consideration. The influence of the material orthotropic property of the transducer on the free undamped response of the system is also investigated. Moreover an effective Young’s modulus and effective Poisson ratio for the uniaxial PVDF film has been introduced using an optimization procedure to minimize the error caused by isotropic assumption of uniaxial PVDF film.
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Dissertations / Theses on the topic "Actuator Orientation"

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Rossouw, Jacques Stefan. "Modelling and evaluation of adaptive control techniques in satellite orientation during large actuator gain changes." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50023.

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Thesis (MScEng)--University of Stellenbosch, 2004.
ENGLISH ABSTRACT: Improvements in the area of satellite orientation control in the presence of large actuator gain changes are investigated. Gain changes primarily originate from actuator failures, but may also result from intermittent sensor availability and geomagnetic field effects. The stability and performance of a classic LQR control solution under these conditions is analyzed through simulation, and two adaptive schemes are developed to improve the response. The adaptive schemes mix elements from bang-bang control to increase performance, and banded control to increase robustness. These control schemes are thoroughly tested through simulation and the results are compared with those obtained for the classic solution. Extensive modelling of the system in the MATLAB™ environment is done to support the analysis of the controllers, and hardware sensors are built to provide realistic orientation measurements to the controllers.
AFRIKAANSE OPSOMMING: Verbeterings in die veld van satelliet oriëntasie beheer in die gevalle waar die aktueerders groot veranderinge in aanwins toon, word ondersoek. Aanwins veranderinge word primêr veroorsaak deur aktueerder falings, maar kan ook deur diskontinue sensor metings en magneetveld effekte van die aarde veroorsaak word. Die stabiliteit en gehalte van 'n klassieke LQR beheer strategie onder hierdie omstandighede word ondersoek deur simulasie, en twee aanpasbare beheer strategieë word ontwikkelom die oordrag te verbeter. Die aanpasbare beheer strategieë meng elemente van "bang-bang" beheer om die gehalte te verbeter, en gebande beheer tegnieke om die robuustheid van die stelsel te verbeter. Hierdie beheer strategieë is deeglik in simulasies getoets en die resultate is vergelyk met dié van die klassieke beheerder. Ekstensiewe modelleering van die stelsel is in die MATLAB™ omgewing gedoen om die beheerders te analiseer, en hardeware sensore is gebou om realistiese orientasie metings aan die beheerders te verskaf.
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Son, Hungsun. "Effects of magnetic field models on control of electromagnetic actuators." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/26616.

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Thesis (Ph.D)--Mechanical Engineering, Georgia Institute of Technology, 2008.
Committee Chair: Lee, Kok-Meng; Committee Member: Bill Singhose; Committee Member: David G. Taylor; Committee Member: Eric Johnson; Committee Member: Nader Sadegh. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Chee, Clinton Yat Kuan. "STATIC SHAPE CONTROL OF LAMINATED COMPOSITE PLATE SMART STRUCTURE USING PIEZOELECTRIC ACTUATORS ©." Thesis, The University of Sydney, 2000. http://hdl.handle.net/2123/709.

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The application of static shape control was investigated in this thesis particularly for a composite plate configuration using piezoelectric actuators. A new electro-mechanically coupled mathematical model was developed for the analysis and is based on a third order displacement field coupled with a layerwise electric potential concept. This formulation, TODL, is then implemented into a finite element program. The mathematical model represents an improvement over existing formulations used to model intelligent structures using piezoelectric materials as actuators and sensors. The reason is TODL does not only account for the electro-mechanical coupling within the adaptive material, it also accounts for the full structural coupling in the entire structure due to the piezoelectric material being attached to the host structure. The other significant improvement of TODL is that it is applicable to structures which are relatively thick whereas existing models are based on thin beam / plate theories. Consequently, transverse shearing effects are automatically accounted for in TODL and unlike first order shear deformation theories, shear correction factors are not required. The second major section of this thesis uses the TODL formulation in static shape control. Shape control is defined here as the determination of shape control parameters, including actuation voltage and actuator orientation configuration, such that the structure that is activated using these parameters will conform as close as possible to the desired shape. Several shape control strategies and consequently algorithms were developed here. Initial investigations in shape control has revealed many interesting issues which have been used in later investigations to improve shape controllability and also led to the development of improved algorithms. For instance, the use of discrete actuator patches has led to greater shape controllability and the use of slopes and curvatures as additional control criteria have resulted in significant reduction in internal stresses. The significance of optimizing actuator orientation and its relation to piezoelectric anisotropy in improving shape controllability has also been presented. Thus the major facets of shape control has been brought together and the algorithms developed here represent a comprehensive strategy to perform static shape control.
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Nicoli, Edoardo. "Characterization of Mixed-Mode Fracture Testing of Adhesively Bonded Wood Specimens." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/28372.

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The primary focus of this thesis was to investigate the critical strain energy release rates (G) for mixed-mode (I/II) fracture of wood adhesive joints. The aims of the study were: (1) quantifying the fracture properties of two material systems, (2) analyzing the aspects that influence the fracture properties of bonded wood, (3) refining test procedures that particularly address layered orthotropic systems in which the layers are not parallel to the laminate faces, of which wood is often a particular case, and (4) developing testing methods that enhance the usefulness of performing mixed-mode tests with a dual-actuator load frame. The material systems evaluated experimentally involved yellow-poplar (Liriodendron tulipifera), a hardwood of the Magnoliaceae family, as adherends and two different adhesives: a moisture-cure polyurethane (PU) and a phenol/resorcinol/-formaldehyde (PRF) resin. The geometry tested in the study was the double cantilever beam that, in a dual-actuator load frame, can be used for testing different levels of mode-mixity. The mixed-mode loading condition is obtained by applying different displacement rates with the two independently controlled actuators of the testing machine. Characteristic aspects such as the large variability of the adhesive layer thickness and the intrinsic nature of many wood species, where latewood layers are alternated with earlywood layers, often combine to confound the measures of the critical values of strain energy release rate, Gc. Adhesive layer thickness variations were observed to be substantial also in specimens prepared with power-planed wood boards and affect the value of Gc of the specimens. The grain orientation of latewood and earlywood, materials that often have different densities and elastic moduli, limits the accuracy of traditional standard methods for the evaluation of Gc. The traditional methods, described in the standards ASTM D3433-99 and BS 7991:2001, were originally developed for uniform and isotropic materials but are widely used by researchers also for bonded wood, where they tend to confound stiffness variations with Gc variations. Experimental analysis and analytical computations were developed for quantifying the spread of Gc data that is expected to be caused by variability of the adhesive layer thickness and by the variability of the bending stiffness along wooden beams.
Ph. D.
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Chee, Clinton Yat Kuan. "STATIC SHAPE CONTROL OF LAMINATED COMPOSITE PLATE SMART STRUCTURE USING PIEZOELECTRIC ACTUATORS �." University of Sydney. Aeronautical Engineering, 2000. http://hdl.handle.net/2123/709.

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The application of static shape control was investigated in this thesis particularly for a composite plate configuration using piezoelectric actuators. A new electro-mechanically coupled mathematical model was developed for the analysis and is based on a third order displacement field coupled with a layerwise electric potential concept. This formulation, TODL, is then implemented into a finite element program. The mathematical model represents an improvement over existing formulations used to model intelligent structures using piezoelectric materials as actuators and sensors. The reason is TODL does not only account for the electro-mechanical coupling within the adaptive material, it also accounts for the full structural coupling in the entire structure due to the piezoelectric material being attached to the host structure. The other significant improvement of TODL is that it is applicable to structures which are relatively thick whereas existing models are based on thin beam / plate theories. Consequently, transverse shearing effects are automatically accounted for in TODL and unlike first order shear deformation theories, shear correction factors are not required. The second major section of this thesis uses the TODL formulation in static shape control. Shape control is defined here as the determination of shape control parameters, including actuation voltage and actuator orientation configuration, such that the structure that is activated using these parameters will conform as close as possible to the desired shape. Several shape control strategies and consequently algorithms were developed here. Initial investigations in shape control has revealed many interesting issues which have been used in later investigations to improve shape controllability and also led to the development of improved algorithms. For instance, the use of discrete actuator patches has led to greater shape controllability and the use of slopes and curvatures as additional control criteria have resulted in significant reduction in internal stresses. The significance of optimizing actuator orientation and its relation to piezoelectric anisotropy in improving shape controllability has also been presented. Thus the major facets of shape control has been brought together and the algorithms developed here represent a comprehensive strategy to perform static shape control.
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Neužil, Ondřej. "Řízení orientace družice - laboratorní úloha." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-377016.

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This diploma thesis is about the basics of satellite systems, about their sorting, usage and technologies. An important part is the description of the principles controlling and stabilization of the small experimental CubeSat type satellites. The main point is the proposition and construction of the laboratory model of the CubeSat type satellite that should simulate the chosen methods of controlling and stabilization in laboratory conditions. The thesis describes the construction of the electronic parts of the model, the controlling software of the satellite’s processor and user software for easy controlling by PC.
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Zhou, Debao. "Design and analysis of a three-degree-of-freedom optical sensor for real-time orientation measurement." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/17582.

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Unterholzner, Alois Verfasser], Hans-Joachim [Akademischer Betreuer] [Wünsche, and León Fernando [Akademischer Betreuer] Puente. "Sensor Orientation Selection and Adaptive Control of an Actuated Sensor Platform for Autonomous Vehicles / Alois Unterholzner. Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik. Betreuer: Hans-Joachim Wünsche. Gutachter: Hans-Joachim Wünsche ; Fernando Puente León." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2015. http://d-nb.info/1099961084/34.

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Unterholzner, Alois Verfasser], Hans-Joachim [Akademischer Betreuer] Wünsche, and León Fernando [Akademischer Betreuer] [Puente. "Sensor Orientation Selection and Adaptive Control of an Actuated Sensor Platform for Autonomous Vehicles / Alois Unterholzner. Universität der Bundeswehr München, Fakultät für Luft- und Raumfahrttechnik. Betreuer: Hans-Joachim Wünsche. Gutachter: Hans-Joachim Wünsche ; Fernando Puente León." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2015. http://d-nb.info/1099961084/34.

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Gobbalipur, Ranganath Jayanth. "Multi-axis probing system for nano-metrology." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1229908979.

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Books on the topic "Actuator Orientation"

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Magnetically actuated propellant orientation experiment, controlling fluid motion with magnetic fields in a low-gravity environment: (MSFC Center Director's Discretionary Fund final report, project no. 93-18). [Marshall Space Flight Center], Ala: National Aeronautics and Space Administration, Marshall Space Flight Center, 2000.

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B, Holt J., and George C. Marshall Space Flight Center., eds. Magnetically actuated propellant orientation experiment, controlling fluid motion with magnetic fields in a low-gravity environment: (MSFC Center Director's Discretionary Fund final report, project no. 93-18). [Marshall Space Flight Center], Ala: National Aeronautics and Space Administration, Marshall Space Flight Center, 2000.

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Book chapters on the topic "Actuator Orientation"

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Yan, Liang, I.-Ming Chen, Chee Kian Lim, Guilin Yang, and Kok-Meng Lee. "Three Degree-of-freedom Optical Orientation Measurement." In Design, Modeling and Experiments of 3-DOF Electromagnetic Spherical Actuators, 133–51. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1646-9_6.

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Cheng, Chuan. "Experimental Verification II: Substrate Grain Orientation-Dependent Self-ordering." In Electro-Chemo-Mechanics of Anodic Porous Alumina Nano-Honeycombs: Self-Ordered Growth and Actuation, 75–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-47268-2_5.

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Schulz, Stefan, Arthur Seibel, and Josef Schlattmann. "Assembly Modes of General Planar 3-RPR Parallel Mechanisms when Using the Linear Actuators’ Orientations." In Advances in Mechanism and Machine Science, 279–88. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20131-9_28.

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Wu, Guanglei, Ning Zhang, Chuangchuang Cui, Huiping Shen, and Xuping Zhang. "Kinematics and Orientation Workspace of a 3-DOF Parallel Robotic Wrist Actuated by Spherical Four-Bar Linkages." In Advances in Robot Kinematics 2020, 268–76. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-50975-0_33.

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Schulz, Stefan, Arthur Seibel, and Josef Schlattmann. "Solution for the Direct Kinematics Problem of the General Stewart-Gough Platform by Using only Linear Actuators’ Orientations." In Advances in Robot Kinematics 2018, 56–64. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93188-3_7.

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Chelliah, Pethuru Raj. "Envisioning the Paradigm of Service Oriented Hydrology Intelligence (SOHI)." In Green Technologies, 1610–36. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-60960-472-1.ch706.

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Hydrology is an increasingly data-intensive discipline and the key contribution of existing and emerging information technologies for the hydrology ecosystem is to smartly transform the water-specific data to information and to knowledge that can be easily picked up and used by various stakeholders and automated decision engines in order to forecast and forewarn the things to unfold. Attaining actionable and realistic insights in real-time dynamically out of both flowing as well as persisting data mountain is the primary goal for the aquatic industry. There are several promising technologies, processes, and products for facilitating this grand yet challenging objective. Business intelligence (BI) is the mainstream IT discipline representing a staggering variety of data transformation and synchronization, information extraction and knowledge engineering techniques. Another paradigm shift is the overwhelming adoption of service oriented architecture (SOA), which is a simplifying mechanism for effectively designing complex and mission-critical enterprise systems. Incidentally there is a cool convergence between the BI and SOA concepts. This is the stimulating foundation for the influential emergence of service oriented business intelligence (SOBI) paradigm, which is aptly recognized as the next-generation BI method. These improvisations deriving out of technological convergence and cluster calmly pervade to the ever-shining water industry too. That is, the bubbling synergy between service orientation and aquatic intelligence empowers the aquatic ecosystem significantly in extracting actionable insights from distributed and diverse data sources in real time through a host of robust and resilient infrastructures and practices. The realisable inputs and information being drawn from water-related data heap contribute enormously in achieving more with less and to guarantee enhanced safety and security for total human society. Especially as the green movement is taking shape across the globe, there is a definite push from different quarters on water and ecology professionals to contribute their mite immensely and immediately in permanently arresting the ecological degradation. In this chapter, we have set the context by incorporating some case studies that detail how SOA has been a tangible enabler of hydroinformatics. Further down, we have proceeded by explaining how SOA-sponsored integration concepts contribute towards integrating different data for creating unified and synchronized views and to put the solid and stimulating base for quickly deriving incisive and decisive insights in the form of hidden patterns, predictions, trends, associations, tips, etc. from the integrated and composite data. This enables real-time planning of appropriate countermeasures, tactics as well as strategies to put the derived in faster activation and actuation modes. Finally the idea is to close this chapter with an overview of how SOA celebrates in establishing adaptive, on-demand and versatile SOHI platforms. SOA is insisted as the chief technique for developing and deploying agile, adaptive, and on-demand hydrology intelligence platforms as a collection of interoperable, reusable, composable, and granular hydrology and technical services. The final section illustrates the reference architecture for the proposed SOHI platform.
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Conference papers on the topic "Actuator Orientation"

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Cao, Lin, and Wenjun (Chris) Zhang. "Integrated Design of Compliant Mechanisms and Embedded Rotary Actuators and Bending Actuators for Motion Generation." In ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59012.

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This paper presents an integrated design approach, a new topology optimization technique, to simultaneously synthesizing the optimal structural topologies of compliant mechanisms (CMs) and actuator placement — bending actuators and rotary actuators — for motion generation. The approach has the following salient features: (1) the use of bending actuators and rotary actuators as the actuation of CMs, (2) the simultaneous optimization of the CM and the location and orientation of the actuator that is embedded in the CM, (3) the guiding of a flexible link from an initial configuration to a series of desired configurations (including precision positions, orientations, and shapes), and (4) a new connectivity checking scheme to check whether the regions of interest in a design candidate are well connected. A program was employed for the geometrically nonlinear finite element analysis of large-displacement CMs driven by either bending actuators or rotary actuators. Two design examples were presented to demonstrate the proposed approach. The design results were 3D printed, and they all achieved desired shape changes when actuated.
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2

Bedillion, Mark D., Deepak Parajuli, and Randy C. Hoover. "Distributed Sensing in Actuator Array Manipulation." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62499.

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Actuator arrays are planar distributed manipulation systems that use multiple two degree-of-freedom actuators to manipulate objects with three degrees of freedom (x, y, and θ). This paper describes methods of sensing the position and orientation of objects on an actuator array using only binary object sensors at each actuator. The object sensor information, when combined, forms a binary image of the object which may be processed to recover object pose. The methods’ effectiveness for rectangular objects is verified via simulation.
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3

Torres, Steffi, Julio San Martin, Brittany Newell, and Jose Garcia. "Simulation and Validation of Fully 3D Printed Soft Actuators." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2240.

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Abstract Flexible actuators are a growing class of devices implemented in soft robotic applications, medical devices and processes involving food and pharmaceutical products. Such actuators have traditionally been manufactured using casting processes or other conventional methods requiring more than one fabrication step. The arrival of flexible 3D printing materials and 3D printing techniques has facilitated the creation of these flexible actuators via additive manufacturing. The work presented in this article displays the analytical characterization and experimental validation of two materials and two actuator designs. The first case presents a finite element analysis (FEA) simulated model of a bellows actuator using a photocurable flexible resin (TangoPlus FLX930) and studies the effect of printing orientation on the simulation. The simulation used a 5 parameter Mooney-Rivlin model to predict the strain behavior of the actuator under hydrostatic pressure. A second case is presented where a Thermoplastic Polyurethane actuator was 3D printed and simulated using the same FEA model and a second calibration of the Mooney-Rivlin 5 parameter model. In both cases experimental data was used to calibrate and validate the simulation. The resulting simulated strain was consistent when the printing orientation of actuators was parallel (0 degrees) to the strain direction of the actuators. Results were less consistent when a print orientation of 45 degrees was applied.
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4

Guo, Fanghong, Xingming Wu, Weihai Chen, and Jingmeng Liu. "Dynamic control of a spherical actuator with orientation measurement feedback." In 2012 7th IEEE Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2012. http://dx.doi.org/10.1109/iciea.2012.6360698.

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5

Lim, Chee Kian, I.-Ming Chen, Liang Yan, Zhiqiang Luo, and Chao Bi. "A Novel Approach in Instantaneous Orientation Sensing of Spherical Actuator." In 4th Asia International Symposium on Mechatronics. Singapore: Research Publishing Services, 2010. http://dx.doi.org/10.3850/978-981-08-7723-1_p187.

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6

Cheeseman, Bryan A., Baoxing Chen, Ahmad Safari, Stephen C. Danforth, and Tsu-Wei Chou. "Design and Analysis of Piezoelectric Actuators Produced by Solid Freeform Fabrication." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1832.

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Abstract Solid Freeform Fabrication (SFF) techniques permit the ready manufacture of ceramic actuators possessing unusual and complex shapes. These actuator designs allow for the optimization of material orientation, poling direction and applied potential direction, which can result in increased displacement. Examples of such designs are detailed in this paper and include a dome shaped actuator possessing tangentially alternating poling and a spiral shaped actuator.
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7

Parajuli, Deepak, Mark D. Bedillion, and Randy C. Hoover. "Actuator Array Manipulation Using Low Resolution Local Sensing." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37147.

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An actuator array is a planar distributed manipulation system that uses multiple two degree-of-freedom actuators to manipulate objects with three degrees of freedom (x, y and θ). This paper presents an accurate method of estimating position and orientation of an object using local sensing and communication. In this method, each of the distributed modules contains a number of binary sensors, weight sensors, and two planar actuators. The binary sensors combined together give a binary image and analog sensors in each module combined together form a grayscale image representation of the weight distribution of the object under manipulation. Additive normalization has been used to combine binary and grayscale distributed sensing images together to come up with increased precision estimates of the position and orientation of an object. A distributed sensing simulation has been developed in Simulink and the effectiveness of this method has been verified for rectangular and circular objects using the Simulink model.
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8

Ac¸ıkalın, Tolga, Ioan Sauciuc, and Suresh V. Garimella. "Piezoelectric Actuators for Low-Form-Factor Electronics Cooling." In ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems collocated with the ASME 2005 Heat Transfer Summer Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/ipack2005-73288.

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The cooling performance of piezoelectric actuators is evaluated for low-form-factor electronics in this work. A piezoelectric actuator is a cantilever made from metal or plastic with a piezoelectric material bonded to it. Under an alternating electrical current, the piezo actuator oscillates back and forth, generating airflow. Compared to conventional fans, these actuators have the advantages of low power consumption, low noise, and smaller dimensions. The parameters investigated in the experiments are actuator orientation, actuator-to-heat source distance, and actuator amplitude. For an actuator power consumption of 31 mW, the heat source temperature was lowered by more than 25°C compared to natural convection conditions (for a 2.45 W heater power dissipation). Performance comparisons against axial fans and natural convection heat sinks show that the piezo actuators perform significantly better in terms of power consumption and cooling volume. This paper was also originally published as part of the Proceedings of the ASME 2005 Heat Transfer Summer Conference.
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9

Zelei, Ambrus, La´szlo´ L. Kova´cs, and Ga´bor Ste´pa´n. "Computed Torque Control Method for Under-Actuated Manipulator." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86409.

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The paper presents the dynamic analysis of a crane-like manipulator system equipped with complementary cables and ducted fan actuators. The investigated under-actuated mechanical system is described by a system of differential-algebraic equations. The position/orientation control problem is investigated with respect to the trajectory generation and the fine positioning of the payload. The closed form results include the desired actuator forces as well as the nominal load angle corresponding to the desired motion of the payload. Considering a PD controller, numerical simulation results and also experiments demonstrate the applicability of the concept of using complementary actuators for controlling the swinging motion of the payload.
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10

Wu, Xingming, Fanghong Guo, Jingmeng Liu, and Weihai Chen. "Bounded control of a spherical actuator based on orientation measurement feedback." In 2011 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2011. http://dx.doi.org/10.1109/robio.2011.6181372.

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