Nonlinear systems

This study proposes a constitutive mechanical law to model the behavior of the interface between a microcracked viscoelastic medium and an undamaged elastic body based on the homogenization method. The interface is modeled by a layer of zero thickness. The coupling between the homogenization technique and the Griffith’s theory is used to provide the effective behavior of the micro-cracked medium.

15p vithomson 02-07-2024 2 0   Download

Part 1 of ebook "Friction dynamics: Principles and applications" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Vibrations and advanced dynamics; Chapter 3 - Friction;...

165p tuongmothua 11-07-2024 0 0   Download

Part 2 of ebook "Methods of mathematical modelling: Continuous systems and differential equations" provides readers with contents including: Chapter 5 - Self-similar scaling solutions of differential equations; Chapter 6 - Perturbation methods; Chapter 7 - Boundary layer theory; Chapter 8 - Long-wave asymptotics for PDE problems; Chapter 9 - Weakly-nonlinear oscillators; Chapter 10 - Fast/slow dynamical systems; Chapter 11 - Reduced models for PDE problems;...

186p daonhiennhien 03-07-2024 1 1   Download

This paper aims to propose a design of a type-2 fuzzy cerebellar model articulation controller for uncertain nonlinear systems, which achieves high stability and accuracy for controlling magnetic levitation systems.

10p viwalton 02-07-2024 2 1   Download

This paper presents an improved method of direct torque control (DTC) for three–phase asynchronous motors with squirrel cage rotors. The improved method of DTC uses three sliding mode controllers to control torque and flux independently.

13p viwalton 02-07-2024 1 1   Download

In this paper, we propose a wavelet type-2 fuzzy brain imitated controller (WT2FBIC) for nonlinear robotic systems. The suggested method combines a wavelet type-2 fuzzy system (WT2FS) and a brain imitated controller (BIC) to improve learning efficiency.

11p viwalton 02-07-2024 2 1   Download

The paper proposed a method to reduce the effect of nonlinear distortion in 16-APSK OFDM system, which is a pilot-based automatic phase shift at the receiver. Transmitted pilot is inserted during the OFDM modulation process in the transmitter. When the pilot passes through the HPA, information about the nonlinear distortion of the HPA will be carried

8p visergeyne 18-06-2024 4 0   Download

Part 1 book "Hybrid systems, optimal control and hybrid vehicles - Theory, methods and applications" includes content: Introduction, introduction to nonlinear programming, hybrid systems and hybrid optimal control, the minimum principle and hamilton - jacobi - bellman equation; discretization and integration schemes for hybrid optimal control problems; dynamic programming; indirect methods for optimal control.

257p dianmotminh03 11-06-2024 2 1   Download

Part 2 of ebook "Device applications of nonlinear dynamics" provides readers with contents including: signal processing and applications; suprathreshold stochastic resonance mediated by multiplicative noise; noise for health, phage-based rapid bacterial identification method; parametric resonance near hopf-turing instability boundary; recurrent neural networks in rainfall–runoff modeling at daily scale; distributed data acquisition system for environment monitoring nonlinear processes;...

99p dongmelo 26-05-2024 4 3   Download

Part 1 of ebook "Device applications of nonlinear dynamics" provides readers with contents including: opening plenary talk; nonlinear dynamics, materials and sensing devices; noise induced switching between oscillation states in a nonlinear micromechanical oscillator; nonadiabaticity in modulated optical traps; signal processing and control in nonlinear nanomechanical systems; signal modulation by martensitic control of shape memory alloy thin film actuator architectures;...

146p dongmelo 26-05-2024 3 2   Download

Part 1 of ebook "Complex nonlinearity: Chaos, phase transitions, topology change and path integrals" provides readers with contents including: Chapter 1 - Basics of nonlinear and chaotic dynamics; Chapter 2 - Phase transitions and synergetics; Chapter 3 - Geometry and topology change in complex systems;...

435p dongmelo 20-05-2024 5 1   Download

This paper attempts to improve the load-carrying capacity of FG-CNTRC cylindrical shells by proposing the design options of the spiral FG-CNTRC stiffener system. By using the anisotropic beam theory and the transformation technique, a homogenization technique for the spiral FG-CNTRC stiffeners is developed and the nonlinear buckling behavior of spirally stiffened cylindrical shells is analysed.

10p dathienlang1012 03-05-2024 2 0   Download

In this paper, geometrical nonlinear flutter analysis of functionally graded carbon nanotubes reinforced composite plates is presented. The governing equations of the system are obtained using the Mindlin plate theory and von Karman geometric nonlinearity. The linear piston theory is utilized to determine the aerodynamic pressure. Applying the Hamilton principle, equations of motion of a system are derived in the matrix form, and then the finite element method is used to obtain the discretized equations.

11p dathienlang1012 03-05-2024 5 0   Download

The paper "Dynamic analysis of stiffened functionally graded composite plates reinforced by carbon nanotubes under blast loading" presents a study of the geometrical nonlinear dynamic of stiffened functionally graded composite plates reinforced by carbon nanotubes (SFG-CNTRC) subjected to blast loading. The governing equations of the system are obtained using the Mindlin plate theory and von Karman geometric nonlinearity.

11p dathienlang1012 03-05-2024 1 0   Download

The nonlinear buckling behaviors of the functionally graded graphene platelet reinforced composite (FG-GPLRC) doubly curved shallow shells under external pressure in the thermal environment are introduced and investigated in this paper. The Donnell shell theory and the strain-displacement relationship of von Karman are used. At the bottom surface of FG-GPLRC doubly curve shallow shells, the FG-GPLRC stiffener system in the transverse, longitudinal, or/and oblique directions is installed to increase the bearing capacity of the shallow shells.

10p dathienlang1012 03-05-2024 0 0   Download

An analytical approach of nonlinear buckling and postbuckling analysis of core-corrugated functionally graded carbon nanotubes reinforced composite (FG- CNTRC) cylindrical panels under axial compression is presented in the present study. A homogenization technique is applied for the corrugated core with thermal effects. The nonlinear stability equation system of panels is formulated by using the Donnell thin shell theory with the von Kármán geometrical nonlinearities.

9p dathienlang1012 03-05-2024 2 0   Download

Lecture Artificial intelligence: Artificial neural network. This lecture provides students with content including: computing systems inspired by biological neural networks; consists of several processing elements that receive inputs and deliver outputs; "learn" to perform tasks by considering examples; be able to model nonlinear processes;... Please refer to the detailed content of the lecture!

47p codabach1016 03-05-2024 2 0   Download

The purpose of the field-oriented control (FOC) is therefore to create a tool that allows the decoupling control of the flux and torque-producing current components from the three-phase AC currents flowing in the coil. The FOC drive system is a system based on the principle of decoupling the above power components thanks to the stator current feedback control (the innermost circuit of the drive system). The FOC-type control method belongs to the class of vector control methods for electrical machines.

22p dianmotminh02 03-05-2024 2 1   Download

This paper presents a method for establishing the exact receptance function of a tapered axially functionally graded (AFG) beam with nonlinear ratios of properties using the Adomian method. In current papers, the Adomian method was applied for linearly tapered beams where the geometric series was used conveniently.

22p dianmotminh02 03-05-2024 3 2   Download

Part 1 book "Wind energy system - Control engineering design" includes content: Introduction, introduction to QFT, miso analog QFT control system, discrete quantitative feedback technique, diagonal mimo QFT, non diagonal mimo QFT93, 97, 102, QFT for distributed parameter systems 115; nonlinear switching control techniques 140; introduction to wind energy systems; standards and certification for wind turbines; wind turbine control objectives and strategies; aerodynamics and mechanical modeling of wind turbines.

330p dianmotminh00 22-04-2024 4 3   Download