13 skills found
snowztail / Irs Aided Swipt Joint Waveform Active And Passive Beamforming Design Under Nonlinear Harvester ModelReconfigurable intelligence surfaces can improve the spectral and energy efficiencies for wireless information and power transfer.
ardiloot / NonlinearTMMTransfer-matrix method (TMM) is powerful analytical method to solve Maxwell equations in layered structures. However, standard TMM is limited by infinite plane waves (e.g no Gaussian beam excitation) and it is only limited to linear processes (i.e calculation of second-harmonic, sum-frequency, difference-frequency generation is not possible). The aim of this package is extand standard TMM to include those features. The physics of those extensions are described in the follwoing publications, first extends the standard TMM to nonlinear processes and the second extends to the beams with arbritary profiles.
kenoticpurge / Corotational Beam ElementsYou ever just wanted to do some large deformation, nonlinear analysis of beams?
vfceball / RC FIAPThe open virtual platform RC-FIAP, developed in Python, with the analysis library OpenSeesPy at its core, is presented to evaluate the seismic vulnerability of different archetypes of reinforced concrete frames, including ACI318 compliant structures. The platform is a tool for educational performance-based earthquake engineering, including research capabilities for risk assessment. In the first phase of the platform presented here, the fragility assessment is carried in a few seconds from conception to pushover analysis, including design and construction of the nonlinear model. Input variables include number of stories and spans, material properties (steel, concrete), dimensioning of beams and columns, gravity loading, seismic design parameters per ASCE 7-16, and choice of design detailing per ACI318-19. The GUI-based platform allows studying the impact of these variables in the performance of frames, by including ASCE/SEI 41-17 acceptance criteria.
QuincyHoward / ABCDRez本代码包（ABCDRez）是基于MATLAB语言的激光光束传输（Laser Beam Propagation）及激光谐振腔仿真（Laser Resonator Simulation）代码包。文章使用高斯光束（Gaussian Beam）描述激光，简单介绍了热效应（Thermal Effect）、腔内非线性变换（Nonlinear Frequency Transformation），主要介绍了光束的调节与匹配（Beam Adjusting and Matching）、驻波谐振腔（Standing Stable Resonator）、行波谐振腔（Traveling Stable Resonator）相关内容。用接近数学表达式的自然化语言，使用户更易学习、掌握及灵活运用。
attaoveisi / Hybrid Fuzzy Kalman FilterMixed Kalman-Fuzzy Sliding Mode State Observer in Disturbance Rejection Control of a Vibrating Smart Structure Atta Oveisi*1, Tamara Nestorović1 1Ruhr-Universität Bochum, Mechanik adaptiver Systeme, Institut Computational Engineering, D-44801, Bochum, Germany. E-Mail: atta.oveisi@rub.de ABSTRACT In the controllers that are synthesized on a nominal model of the nonlinear plant, the parametric matched uncertainties and nonlinear/unmodeled dynamics of high order nature can significantly affect the performance of the closed-loop system. In this note, owing to the robust character of the sliding mode observer against modeling perturbations, measurement noise, and unknown disturbances and due to the non-fragile behavior of the Kalman filter against process noise, a mixed Kalman sliding mode state-observer is proposed and later enhanced by the addition of an intelligent fuzzy agent. In light of the proposed technique, the chattering phenomena and the conservative boundary neighboring layer of the high gain sliding mode observer are addressed. Then, a robust active disturbance rejection controller is developed by using static feedback of the estimated states using direct Lyapunov quadratic stability Theorem. The reduced order plant for control design purposes is subjected to some simulated square-integrable disturbances and is assumed to have mismatch uncertainties in system matrices. Finally, the robust performance of the closed-loop scheme with respect to the mentioned perturbation signals and modeling imperfections is tested by implementing the control system on a mechanical vibrating smart cantilever beam. Keywords: Fuzzy system; Nonlinear control; Active disturbance rejection; Kalman Filter; Vibration suppression.
gnotomista / FemFinite element method for linear and nonlinear beams and plates
madhavanunni / Nonlinear BeamformingRepository to share scripts and functions for Nonlinear Beamforming for Ultrasound Flow Imaging.
THREAD-3-2 / Flyingspaghetti VendyVelocity-based finite element formulation for nonlinear dynamic analysis of beams
OpenWECD / HawtC.PublicA Open-Source Horizontal axis-Aero-Wave-Turbulence Coupling(HawtC) Tool for dynamic simulation of floating offshore wind turbine(FOWT).And supports the dynamic coupling simulation of the tuned mass damper and tuned mass inertia damper for wind turbine blades and towers
shm-unesp / ADELEADELE is a dataset of vibration in a beam that exhibits nonlinear behavior even in the healthy condition, and it is exposed to a type of damage that causes the structure to display a nonlinear behavior with a different nature than the initial one. This experiment was conducted by the SHM lab at the University of California San Diego with collaboration at SHM Lab UNESP/Ilha Solteira.
guybaruch / 2DNLHCode for solution of scalar Nonlinear Helmholtz equation for modeling collapsing optical beams.
KRproject-tech / Elastica Vs Euler Beam MATLABComparisons between Elastica beam (considering geometrical nonlinearity) model and Euler beam model (linear) under the pure bending problem.
