An Electricity Generator Based on the Interaction of Static and Dynamic Magnets

Rubio, José de Jesús; Aguilar, Arturo; Meda-Campaña, J. A.; Ochoa, Genaro; Balcazar, Ricardo; López, Jesús Eduardo Rivera

doi:10.1109/tmag.2019.2911051

Cited by 16 publications

(9 citation statements)

References 30 publications

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“…Generate the searching direction by equation 11) (4Calculate the right-left antenna position and by equations (12) and 13) (5Calculate the Lévy flight length s by equation 19) (6Calculate the step size of searching by equation 21) (7Calculate the next position of the ith beetle by equation 22) (8Calculate the function value f(x k n )of ith beetle. (9) if f(x k n )is better than f best (10) x…”

Section: Lbas-pid Controllermentioning

confidence: 99%

“…In an electrohydraulic system, force generation and amplification are achieved through the force servo control system. Because of its superior load adaptability in the complex stress environments, the force servo control system plays a major role in engineering fields including electricity generator [10], flight simulator [11], gas turbine [12], robotic arm [13], and vehicles [14]. With the development of the electrohydraulic system, the force servo control system has been one of the hottest topics in engineering research.…”

Section: Introductionmentioning

confidence: 99%

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Improved Beetle Antennae Search Algorithm-Based Lévy Flight for Tuning of PID Controller in Force Control System

Fan

Shao

Sun

et al. 2020

Mathematical Problems in Engineering

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To enhance the anti-interference capability of an electrohydraulic force servo control system and increase the efficiency of the PID controller, this paper proposes a LBAS-PID controller. In LBAS, the random step created by the Lévy flight trajectory was used in the original algorithm to enhance the diversity of the population and convergence speed. In the force servo control system, LBAS-PID can enhance the performance of the system. First, the basic mathematical model of an electrohydraulic force servo control system was built based on theoretical analysis. The transfer function model was obtained by identifying the system parameters. Second, the introduced Lévy flight beetle antennae search algorithm was introduced and applied to ten benchmark functions, and the results were compared with those of other algorithms. Then, the proposed algorithm was applied in the PID controller to tune PID parameters in the force servo control system. To comprehensively evaluate performances of an electrohydraulic force servo control system that is controlled by the LBAS-PID controller, the frequency response analysis and temporal response analysis were obtained. The numerical analysis results indicate that an electrohydraulic force servo control system with an LBAS-PID controller could substantially increase the control characteristics of the system and restrain the external disturbances when different interference signals are examined.

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Section: Lbas-pid Controllermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improved Beetle Antennae Search Algorithm-Based Lévy Flight for Tuning of PID Controller in Force Control System

Fan

Shao

Sun

et al. 2020

Mathematical Problems in Engineering

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“…Fractional differential equations have obtained a remarkable reputation among the mathematicians due to rapid development which is applicable in many fields such as mathematics, chemistry, and electronics. For more details, we refer to [10][11][12][13][14][15][16]. e coupled systems of fractional differential equations are mainly significant because such systems occur frequently in various scientific applications (see [17][18][19]).…”

Section: Introductionmentioning

confidence: 99%

Coupled System of Nonlinear Fractional Langevin Equations with Multipoint and Nonlocal Integral Boundary Conditions

Salem

Alzahrani

Alnegga

2020

Mathematical Problems in Engineering

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is research paper is about the existence and uniqueness of the coupled system of nonlinear fractional Langevin equations with multipoint and nonlocal integral boundary conditions. e Caputo fractional derivative is used to formulate the fractional differential equations, and the fractional integrals mentioned in the boundary conditions are due to Atangana-Baleanu and Katugampola. e existence of solution has been proven by two main fixed-point theorems: O'Regan's fixed-point theorem and Krasnoselskii's fixed-point theorem. By applying Banach's fixed-point theorem, we proved the uniqueness result for the concerned problem. is research paper highlights the examples related with theorems that have already been proven. HindawiMathematical Problems in Engineering Volume 2020, Article ID 7345658, 15 pages https://doi.org/10.1155/2020/7345658

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“…There are several control approaches, such as the statespace method in modern control (Rubio et al, 2019a), and its successful application in electric vehicle control (Gao et al, 2020), perturbations attenuation (Rubio et al, 2019b) and manipulator control (Rubio, 2018). Admittance algorithms in classical control are often used and successfully applied in many rehabilitation systems for active training.…”

Section: Introductionmentioning

confidence: 99%

Development of an Improved Rotational Orthosis for Walking With Arm Swing and Active Ankle Control

Zhang

Yang

et al. 2020

Front. Neurorobot.

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Based on interlimb neural coupling, gait robotic systems should produce walking-like movement in both upper and lower limbs for effective walking restoration. Two orthoses were previously designed in our lab to provide passive walking with arm swing. However, an active system for walking with arm swing is desirable to serve as a testbed for investigation of interlimb neural coupling in response to voluntary input. Given the important function of the ankle joint during normal walking, this work aimed to develop an improved rotational orthosis for walking with arm swing, which is called ROWAS II, and especially to develop and evaluate the algorithms for active ankle control. After description of the mechanical structure and control schemes of the overall ROWAS II system, the closed-loop position control and adjustable admittance control algorithms were firstly deduced, then simulated in Matlab/Simulink and finally implemented in the ROWAS II system. Six able-bodied participants were recruited to use the ROWAS II system in passive mode, and then to estimate the active ankle mechanism. It was showed that the closed-loop position control algorithms enabled the ROWAS II system to track the target arm-leg walking movement patterns well in passive mode, with the tracking error of each joint <0.7 • . The adjustable admittance control algorithms enabled the participants to voluntarily adjust the ankle movement by exerting various active force. Higher admittance gains enabled the participants to more easily adjust the movement trajectory of the ankle mechanism. The ROWAS II system is technically feasible to produce walking-like movement in the bilateral upper and lower limbs in passive mode, and the ankle mechanism has technical potential to provide various active ankle training during gait rehabilitation. This novel ROWAS II system can serve as a testbed for further investigation of interlimb neural coupling in response to voluntary ankle movement and is technically feasible to provide a new training paradigm of walking with arm swing and active ankle control.

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An Electricity Generator Based on the Interaction of Static and Dynamic Magnets

Cited by 16 publications

References 30 publications

Improved Beetle Antennae Search Algorithm-Based Lévy Flight for Tuning of PID Controller in Force Control System

Improved Beetle Antennae Search Algorithm-Based Lévy Flight for Tuning of PID Controller in Force Control System

Coupled System of Nonlinear Fractional Langevin Equations with Multipoint and Nonlocal Integral Boundary Conditions

Development of an Improved Rotational Orthosis for Walking With Arm Swing and Active Ankle Control

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