Structural Schemes and Structural-Parametric Models of Electroelastic Actuators for Nanomechatronics Systems

2019 ◽  
Vol 20 (4) ◽  
pp. 219-229
Author(s):  
S. M. Afonin
Keyword(s):  
Wave Equation ◽  
Control Systems ◽  
Dynamic Characteristics ◽  
Transfer Functions ◽  
Piezoelectric Effect ◽  
Parametric Model ◽  
Parametric Models ◽  
Physical Parameters ◽  
Static And Dynamic Characteristics ◽  
Automatic Control Systems

The parametric structural schemes, structural-the parametric models and the transfer functions of the electroelastic actuators for the nanomechatronics systems are obtained. The transfer functions of the piezoactuator are determined under the generalized piezoelectric effect. The changes in the elastic compliance and the stiffness of the piezoactuator are found, taking into account the type of control. The decision wave equation and the structural-parametric models of the electroelastic actuators are obtained. Effects of the geometric and physical parameters of the electroelastic actuators and the external load on its static and dynamic characteristics are determined. The parameteric structural schemes for the electroelastic actuators for the nanomechatronics systems are obtained. The transfer functions are determined. For calculation of the automatic control systems for the nanometric movements with the electroelastic actuators are obtained the parametric structural schemes and the transfer functions of actuators. Static and dynamic characteristics of the electroelastic actuators are determined. The application of electroelastic actuators solves problems of the precise matching in microelectronics and nanotechnology, compensation of temperature and gravitational deformations, atmospheric turbulence by wave front correction. By solving the wave equation with allowance for the corresponding equations of the piezoelectric effect, the boundary conditions on loaded working surfaces of the electroelastic actuator, the strains along the coordinate axes, it is possible to construct the structural parametric model of the actuator. The transfer functions and the parametric structural schemes of the electroelastic actuator are obtained from the equations describing the corresponding structural parametric models and taking into account the opposed electromotive force of the electroelastic actuator for the nanomechatronics systems.

scholarly journals Structural-Parametric Model Electroelastic Actuator of Mechatronics Systems for Nanotechnology and Nanomedicine

2018 ◽  
Vol 3 (1) ◽  
Keyword(s):  
Wave Equation ◽  
Control Systems ◽  
Dynamic Characteristics ◽  
External Load ◽  
Transfer Functions ◽  
Parametric Model ◽  
Physical Parameters ◽  
Schematic Diagram ◽  
Piezoelectric Effects

Structural-parametric model, decision of wave equation, parametric structural schematic diagram, transfer functions of the electroelastic actuator of mechatronics systems for nanotechnology and nanomedicine are obtained. Effects of geometric and physical parameters of the piezoactuator and the external load on its dynamic characteristics are determined. The parametric structural schematic diagram and the transfer functions of the piezoactuator for the transverse, longitudinal, shift piezoelectric effects are obtained from the structural-parametric model of the piezoactuator. For calculation of the control systems for nanotechnology with the piezoactuator its the parametric structural schematic diagram and the transfer functions are determined. The generalized parametric structural schematic diagram of the electroelastic actuator is constructed.

Structural-parametric model of an electroelastic actuator for nanomechanics

2020 ◽  
pp. 3-11
Author(s):  
S.M. Afonin
Keyword(s):  
Transfer Function ◽  
Piezoelectric Actuator ◽  
Transfer Functions ◽  
Piezoelectric Effect ◽  
Parametric Model ◽  
Elastic Compliance ◽  
Parametric Models ◽  
Piezo Actuator ◽  
Structural Scheme ◽  
Model Transfer

Structural-parametric models, structural schemes are constructed and the transfer functions of electro-elastic actuators for nanomechanics are determined. The transfer functions of the piezoelectric actuator with the generalized piezoelectric effect are obtained. The changes in the elastic compliance and rigidity of the piezoactuator are determined taking into account the type of control. Keywords electro-elastic actuator, piezo actuator, structural-parametric model, transfer function, parametric structural scheme

scholarly journals A Block Diagram of Electromagnetoelastic Actuator for Control Systems in Nanoscience and Nanotechnology

2020 ◽  
Vol 8 (4) ◽  
pp. 23-33
Author(s):  
Sergey Mikhailovich Afonin
Keyword(s):  
Control Systems ◽  
Transfer Functions ◽  
Piezoelectric Effect ◽  
Block Diagram ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Linear Ordinary Differential Equation ◽  
Nanoscience And Nanotechnology ◽  
Direct Piezoelectric Effect ◽  
Piezoelectric Effects

The block diagram and the transfer functions of the electromagnetoelastic actuator are received for control systems in nanoscience and nanotechnology. The block diagram of the electromagnetoelastic actuator is reflected the transformation of electrical energy into mechanical energy, in contrast to Cady’s and Mason’s electrical equivalent circuits of piezotransducer. The electromagnetoelasticity equation and the second order linear ordinary differential equation with boundary conditions are solved for calculations the block diagram of the electromagnetoelastic actuator. The block diagram of the piezoactuator is obtained with using the reverse and direct piezoelectric effects. The back electromotive force is determined from the direct piezoelectric effect equation. The transfer functions of the piezoactuators are obtained for control systems in nanoscience and nanotechnology.

scholarly journals Ordinary differential equations for the dynamic characteristics of heating boilers

2018 ◽  
Vol 194 ◽  
pp. 01024
Author(s):  
Sergei Khaustov ◽  
Olga Guk ◽  
Igor Razov
Keyword(s):  
Differential Equations ◽  
Ordinary Differential Equations ◽  
Control Systems ◽  
Dynamic Characteristics ◽  
Solid Fuel ◽  
Computational Time ◽  
One Dimensional ◽  
Automatic Control Systems ◽  
Set Up

The paper presents ordinary differential equations for the dynamic characteristics of a solid fuel boiler that can be combined into one-dimensional nonstationary mathematical model for simulating long-term dynamics of a solid fuel boiler. This model requires less computational time for a qualitative simulation of boiler’s operation than known CFD-solutions. The long-term dynamic model presented can help to determine annual costs, to set up automatic control systems and to detect dangerous deviations in the project.

Modeling and Identification of Gas Journal Bearings: Self-Acting Gas Bearing Results

2002 ◽  
Vol 124 (4) ◽  
pp. 716-724 ◽  
Author(s):  
G. Belforte ◽  
T. Raparelli ◽  
V. Viktorov
Keyword(s):  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Transfer Functions ◽  
Analytical Data ◽  
Journal Bearings ◽  
Rotating Shaft ◽  
Static And Dynamic Characteristics ◽  
Gas Bearings ◽  
Wide Range ◽  
Analytical Relations

A mathematical model is elaborated with analytical relations for transfer functions and for gas-film stiffness and damping coefficients for self-acting and externally pressurized gas journal bearings with four supply orifices positioned at the center plane for rotating shaft displacements near the bearing center. Averaging and corrective coefficients are elaborated. In this paper static and dynamic characteristics of self-acting gas bearings are investigated. Results derived using the developed mathematical model are compared with the results derived from numerical computations of a non-linear distributed parameter model of the gas bearings. The results obtained demonstrate that analytical data are in good agreement with the numerical data for wide range of parameters and the mathematical model developed makes the simple calculation of static and dynamic characteristics of self-acting gas bearings possible. Derived analytical relations for transfer functions and for gas-film coefficients of gas bearings provide an efficient means for designing rotor-bearing systems.

scholarly journals NEUROIDENTIFICATION WITH NEURO-SELF Tuning TO ENSURE THE OPERATION OF THE CURRENT LOOP OF THE ELECTRIC DRIVE WITH THE DESIRED STATIC ANDDYNAMIC CHARACTERISTICS

2018 ◽  
Vol 15 (30) ◽  
pp. 513-519
Author(s):  
V. M. BUYANKIN
Keyword(s):  
Control Systems ◽  
Dynamic Characteristics ◽  
Electric Drive ◽  
Reference Model ◽  
Control Object ◽  
Current Loop ◽  
Static And Dynamic Characteristics ◽  
Electric Drives ◽  
Self Tuning ◽  
Model Training

The synthesis of neural regulators for control systems of electric drives is considered in the article. The stable work and features of the application of neural regulators in closed circuits are analyzed. Neuroregulators self-adjust when changing the parameters of the control object. Information on the change in the parameters of the control object is compared with the optimal desired characteristics of the reference model, training signals are generated for the neuroregulators, which provide the necessary optimal static and dynamic characteristics of electric drive.

scholarly journals Identification of UAV model parameters from flight and computer experiment data

2021 ◽  
pp. 12-22
Author(s):  
Serhii Kochuk ◽  
Dinh Dong Nguyen ◽  
Artem Nikitin ◽  
Rafael Trujillo Torres
Keyword(s):  
Mathematical Models ◽  
Automatic Control ◽  
Control Systems ◽  
Transfer Functions ◽  
Parametric Identification ◽  
Model Parameters ◽  
Identification Methods ◽  
Automatic Control Systems ◽  
Dynamic Objects ◽  
Structural And Parametric Identification

The object of research in the article is various well-known approaches and methods of structural and parametric identification of dynamic controlled objects - unmanned aerial vehicles (UAVs). The subject of the research is the parameters of linear and nonlinear mathematical models of spatial and isolated movements, describing the dynamics and aerodynamic properties of the UAV and obtained both from the results of flight experiments and using computer object-oriented programs for 3-D UAV models. The goal is to obtain mathematical models of UAV flight dynamics in the form of differential equations or transfer functions, check them for reliability and the possibility of using them in problems of synthesis of algorithms for automatic control systems of UAVs. Tasks to be solved: evaluation of the analytical (parametric), direct (transient), as well as the identification method using the 3-D model of the control object. Methods used structural and parametric identification of dynamic objects; the determination of static and dynamic characteristics of mathematical models by the type of their transient process; the System Identification Toolbox package of the MatLab environment, the Flow Simulation subsystem of the SolidWorks software and the X-Plane software environment. The experimental parameters of UAV flights, as well as the results of modeling in three-dimensional environments, are the initial data for the identification of mathematical models. The following results were obtained: the possibility of analytical and computer identification of mathematical models by highly noisy parameters of the UAV flight was shown; the mathematical models of UAVs obtained after identification is reliable and adequately reproduce the dynamics of a real object. A comparative analysis of the considered UAV identification methods is conducted, their performance and efficiency are confirmed. Conclusions. The scientific novelty of the result obtained is as follows: good convergence, reliability and the possibility of using the considered identification methods for obtaining mathematical models of dynamic objects to synthesize algorithms for automatic control systems of UAVs is shown.

scholarly journals Optimal Control of Systems with Distributed Parameters

2019 ◽  
pp. 903-915
Author(s):  
Nikolay D. Demidenko ◽  
Lyudmila V. Kulagina ◽  
Artyom A. Pyanykh
Keyword(s):  
Numerical Method ◽  
Control Systems ◽  
Distributed Control ◽  
Transfer Functions ◽  
Control Object ◽  
Automatic Control Systems ◽  
Control Functions ◽  
Distributed Parameters ◽  
The Time Domain ◽  
Optimization Transfer

The article presents outcomes of optimizing a distributed control system for objects with distributed parameters. Variational method was applied while optimization. Transfer functions are obtained for main channels of disturbances and controls. To describe processes in the time domain, a Laplace numerical method of inverting the transform is used. Numerical experiment for heat exchange systems of a counterflow heat exchanger is demonstrated. Various controllers have been tested in automatic control systems. Efficiency of distributed control of aeon of single-circuit and double-circuit control systems is shown. In this case, acceleration curves were obtained at the output of the control object. Distributed control functions are also highlighted. The numerical method provides an iterative calculation process with a fairly small number of iterations

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