Academic literature on the topic 'Servomechanism Simulation methods'
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Journal articles on the topic "Servomechanism Simulation methods"
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Muraru, Vergil, Constantin Calinoiu, Sebastian Muraru, Ana Dulgheru, and Cornelia Muraru-Ionel. "Mathematical modelling and numerical simulation of linear electro-hydraulic servomechanism with stepper motor." E3S Web of Conferences 180 (2020): 04005. http://dx.doi.org/10.1051/e3sconf/202018004005.
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The paper presents the results of research on the performance of linear electro-hydraulic servomechanisms with stepper motor, evaluated by mathematical modelling and numerical simulation with the AMESIM software package. These servomechanisms have a great potential for application, including for agricultural technical equipment. Servomechanisms of various types are used for the rapid and high precision operation of the various systems. In practice, electro-hydraulic servomechanisms have been required in the case of the systems requiring high forces or moments. These equipment are automatic hydraulic tracking systems and can be analysed with methods specific to automatic systems. The paper contains a structural description of an electro-mechanical servomechanism with stepper motor, its operation, mathematical model and its performances obtained by numerical simulation. The mathematical modelling of the electro-hydraulic servomechanism is based on the relations between the input sizes and output sizes of the equipment in its structure as well as the connection relations between these equipment. Based on the obtained results it is demonstrated that the analysis and synthesis of electro-hydraulic servomechanisms with stepper motor can be determined by numerical simulation using the AMESIM simulation software.
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Pellicciari, Marcello, Giovanni Berselli, Mirko Ori, and Francesco Leali. "The Role of Co-Simulation in the Integrated Design of High-Dynamics Servomechanisms: An Experimental Evaluation." Applied Mechanics and Materials 278-280 (January 2013): 1758–64. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.1758.
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This paper reports about the design and modeling process of high performance servo-actuated mechanisms for automatic machines. Besides being a delicate and time consuming process, coupled simulations based on virtual prototyping finally offer the chance to integrate engineering methods proper of control system engineering and mechanical design. In particular, the main target of this work is to investigate how different virtual prototyping approaches, each having increasing level of detail, can contribute to the appropriate prediction of the expected machine performance. These results are then compared with experimental data obtained on a real servomechanism prototype. The comparison quantitatively demonstrate the improvement on torque prediction and position error reduction when detailed models of the controller and the electric motor dynamics are coupled with the mechanical system model.
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Aguiar, Renato, and Izabella Sirqueira. "Fuzzy Control of a Servomechanism: Practical Approach using Mamdani and Takagi- Sugeno Controllers." International Journal of Fuzzy Logic Systems 11, no. 04 (October 30, 2021): 19–33. http://dx.doi.org/10.5121/ijfls.2021.11402.
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The main objective of this work is to propose two fuzzy controllers: one based on the Mamdani inference method and another controller based on the Takagi- Sugeno inference method, both will be designed for application in a position control system of a servomechanism. Some comparations between the methods mentioned above will be made with regard to the performance of the system in order to identify the advantages of the Takagi- Sugeno method in relation to the Mamdani method in the presence of disturbances and nonlinearities of the system. Some results of simulation and practical application are presented and results obtained showed that controllers based on Takagi- Sugeno method is more efficient than controllers based on Mamdani method for this specific application.
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Vu, Truong Nguyen Luan, Vo Lam Chuong, Nguyen Tam Nguyen Truong, and Jae Hak Jung. "Analytical Design of Fractional-Order PI Controller for Parallel Cascade Control Systems." Applied Sciences 12, no. 4 (February 21, 2022): 2222. http://dx.doi.org/10.3390/app12042222.
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The fractional-order proportional-integral (FOPI) controller tuning rules based on the fractional calculus for the parallel cascade control systems are systematically proposed in this paper. The modified parallel cascade control structure (PCCS) with the Smith predictor is addressed for stable, unstable, and integrating process models with time delays. Normally, the PCCS consists of three controllers, including a stabilized controller, for a class of unstable and integrating models, a disturbance rejection controller in the secondary loop, and a primary servomechanism controller. Accordingly, the ideal controller is obtained by using the internal model control (IMC) approach for the inner loop. The proportional-derivative (PD) controller is suggested for the stabilized controller and is designed based on a stability criterion. Based on the fractional calculus, the analytical tuning rules of the FOPI controller for the outer loop can be established in the frequency domain. The simulation study is considered for three mentioned cases of process models and the results demonstrate the flexibility and effectiveness of the proposed method for the PCCS in comparison with the other methods. The robustness of the proposed method is also justified by perturbed process models with ±20% of process parameters including gain, time constant, and delay time.
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Hubinský, Peter, and Peter Häuptle. "Reducing Oscillations During Positioning of A Servomechanism Having Flexibility." Journal of Electrical Engineering 63, no. 4 (July 1, 2012): 201–12. http://dx.doi.org/10.2478/v10187-012-0030-x.
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Reducing Oscillations During Positioning of A Servomechanism Having FlexibilityThis contribution describes the method of harmonic modulation of a velocity set-point signal in control to reduce undesirable oscillations. Especially the combination of this method with the well known input shaping method is of interest. Such a solution seeks for instance to a control structure used for servomechanisms equipped with a gear-box or namely mechatronic drives (MDs); where undesirable oscillations in transient- as well as semi-steady-states could arise. The combination of the methods has been proofed under real conditions in an experimental setup. Based on this, simulations regarding different industry demands and the proper choice of the modulation signal types will be introduced. Further it will be discussed which modulation signal should be used for the correspondingieindustrial demands. Both proposed methods are in the category of feed-forward-control which led to a practical implementation where no additional sensor (for measuring these undesirable effects) is needed to improve the system dynamics.
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Choi, Hyun-Taek, Bong Keun Kim, Il Hong Suh, and Wan Kyun Chung. "Design of Robust High-Speed Motion Controller for a Plant With Actuator Saturation." Journal of Dynamic Systems, Measurement, and Control 122, no. 3 (August 25, 1998): 535–41. http://dx.doi.org/10.1115/1.1286520.
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A robust high-speed motion controller is proposed. The proposed controller consists of the proximate time optimal servomechanisms (PTOS) for high-speed motion, disturbance observer (DOB) for robustness, friction compensator, and saturation handling element. In the proposed controller, DOB basically provides the chance to apply PTOS to nondouble integrator systems by drastically reducing disturbances as well as unwanted signals due to difference between real system and the double integrator model. But, in DOB-based systems, if control input is saturated due to control input of PTOS and/or DOB, overall system stability cannot be guaranteed, which is first found and analyzed in this paper. To solve this problem, robust stability and internal stability conditions of DOB-based system are derived. It is also shown that DOB could violate the internal stability, when the control input is saturated. Eventually, a simple saturation handling element is inserted to maintain internal stability of overall system. Also, we explain that our two saturation handling methods, i.e., Additional Saturation Element (ASE) and Self Adjusting Saturation (SAS) are the equivalent solutions of saturation problem to maintain internal stability. The stability and performances of the proposed controller are verified through numerical simulations and experiments using a precision linear motor system. [S0022-0434(00)01103-5]
Dissertations / Theses on the topic "Servomechanism Simulation methods"
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DeVore, Scott Lawrence. "Simulation methods for optical disk drive functions." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184474.
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Computer simulations of the optical servo functions of optical disk drives are developed and compared with experimental results. The focus control servo is investigated first, with emphasis on the astigmatic focus detection method. A paraxial ray trace, enhanced to allow tolerance studies of tilted and decentered surfaces, is used to calculate the size and orientation of an astigmatic blur on a quadrant photodetector as a function of focus error. The resulting irradiance distribution is integrated over the detector elements and processed to yield typical focus servo signals. A method for simulating generalized astigmatic focus systems, independent of a particular design, is also shown. The simulation results are used to derive normalized tolerance curves for detector misalignment and spot motion. Alignment diagnostics based on the servo signals are also presented. A wavefront aberration model is also developed and used to investigate the focus servo's performance in the presence of common aberrations. Simulations based on diffraction theory are used to investigate the radial tracking servo. Both scalar and vector diffraction theories are considered. The scalar theory is found to be adequate in most cases, while offering a large advantage in computational efficiency. A model for computing the signals detected by scanning the microscopic features of the disk is developed using the optical cross transfer function that describes the imaging characteristics of partially coherent systems. This model is used to investigate push-pull and three beam tracking. Aberrations, data patterns, detector misalignment, and pregroove profile are all examined for their effects on the servo signals. Crosstalk between the focus and tracking error detection is also briefly considered, and a possible extension of the radial tracking servo model to investigate this phenomenon is suggested.
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Hermini, Helder Anibal 1968. "Uma contribuição ao estudo de não-linearidades na modelagem e controle de manipuladores." [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265033.
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Orientador: João Mauricio RosarioDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-07-21T12:17:51Z (GMT). No. of bitstreams: 1 Hermini_HelderAnibal_M.pdf: 23638216 bytes, checksum: 10e5b83880a18ac1bd17625ea99de153 (MD5) Previous issue date: 1996
Resumo: Este trabalho analisa a nível teórico e de simulação as Não-Linearidades presentes na modelagem e controle de robôs. Ao mesmo tempo é apresentado um estudo detalhado sobre sistemas Não-Lineares envolvendo o desenvolvimento de Controladores Não-Lineares para Manipuladores Industriais. As simulações são realizadas a partir do desenvolvimento do modelo dinâmico de manipuladores de até dois graus de liberdade, considerados rígidos, podendo ser futuramente estendidos a outros graus de liberdade e ao caso de manipuladores flexíveis. A partir dos resultados apresentados na simulação, pode-se mostrar vantagens e inconvenientes da utilização desses controladores em relação aos controladores tradicionais
Abstract: This work analyses the theory and simulation of Non-Linearitys found in the equations and robots control with one and two degrees of freedom. Simultaneously it is presented a detailed work on non linear system involving the development of Non Linear Controls for Industrial Manipulators. This process is moré advantageous than the classical linear controls. Extension to other related works including Flexible Manipulators are also Suggested.
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
Book chapters on the topic "Servomechanism Simulation methods"
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Vasiliu, Nicolae, Daniela Vasiliu, Constantin Drăgoi, Constantin Călinoiu, and Toma Cojocaru-Greblea. "Hybrid Steering Systems for Automotive Applications." In Automotive System Engineering - New Methods and Optimal Solutions [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94460.
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The paper presents the results of the researches performed in order to find out the static and dynamic performances of some recent types of hybrid electrohydraulic servomechanisms. The new concept was generated by the needs of the modern aerospace technology called “flight by wire”, directed to the use of compact actuators composed mainly by a brushless motor driving a hydrostatic pump connected in a close loop with a hydraulic cylinder. The numerical simulations performed with Simcenter Amesim language pointed out the possibility of saving a lot of energy with this new concept, already used on civil airplanes and fighters. The new wave of autonomous driving generated a lot of combinations of electric and hydraulic components, according the peculiarities of applications. The authors studied the accuracy of the hybrid steering system of an articulated tractor based on a digital industrial servo valve combined with an ORBITROL standard unit. The structure of the last generation of the trucks hybrid steering systems was also studied, taking into account the real performances of each component. Finally, the effect of the strong penetration of the hybrid servo systems in the automotive manufacturing systems is assessed.
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Caldwell, Barrett S., Megan Nyre-Yu, and Jordan R. Hill. "Advances in Human-Automation Collaboration, Coordination and Dynamic Function Allocation." In Advances in Transdisciplinary Engineering. IOS Press, 2019. http://dx.doi.org/10.3233/atde190141.
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Effective integration of humans and automation in control systems engineering has been an ongoing effort since the original publication of McRuer’s descriptions of human operators in servomechanism systems in 1959. Over the past 60 years, increasing capabilities of automation and computer systems have resulted in changing considerations of function allocation and human-automation interaction since Fitts’ “Humans are better at / Machines are better at” descriptions of the early 1950s. The processes of distributed autonomy and dynamic function allocation in modern human-automation and human-robotic interactions benefit from increased computing capabilities, resulting in systems with potentially fluid (and sometimes conflicting) boundaries for human vs. automation control. Using examples from human and robotic spaceflight, robotics can demonstrate significant autonomy (automated “safe-moding” and restart by Mars rovers), and humans may have limited autonomy (when astronauts conducting extravehicular activity rely on and wait for ground controllers to create or modify procedures to complete required tasks). Proposed future advances in human-automation interaction and coordination include the development of “centaur” teams of humans interacting with sophisticated software and robotic agents as team members (rather than fixed allocations as human-controlled servos or automation-controlled autonomous systems). Approaches within the authors’ lab include qualitative research of process and cognitive task demands to create functional architecture for AI applications in cyber security. Another method uses agent-based modeling to incorporate individual thinking style and interpersonal interactions in task performance simulations, effectively creating more robust hybrid systems incorporating cognitive and social factors in complex settings.