Dynamical system of a time-delayed ϕ6-Van der Pol oscillator: a non-perturbative approach

Abstract

A remarkable example of how to quantitatively explain the nonlinear performance of many phenomena in physics and engineering is the Van der Pol oscillator. Therefore, the current paper examines the stability analysis of the dynamics of ϕ6-Van der Pol oscillator (PHI6) exposed to exterior excitation in light of its motivated applications in science and engineering. The emphasis in many examinations has shifted to time-delayed technology, yet the topic of this study is still quite significant. A non-perturbative technique is employed to obtain some improvement and preparation for the system under examination. This new methodology yields an equivalent linear differential equation to the exciting nonlinear one. Applying a numerical approach, the analytical solution is validated by this approach. This novel approach seems to be impressive and promising and can be employed in various classes of nonlinear dynamical systems. In various graphs, the time histories of the obtained results, their varied zones of stability, and their polar representations are shown for a range of natural frequencies and other influencing factor values. Concerning the approximate solution, in the case of the presence/absence of time delay, the numerical approach shows excellent accuracy. It is found that as damping and natural frequency parameters increase, the solution approaches stability more quickly. Additionally, the phase plane is more positively impacted by the initial amplitude, external force, damping, and natural frequency characteristics than the other parameters. To demonstrate how the initial amplitude, natural frequency, and cubic nonlinear factors directly affect the periodicity of the resulting solution, many polar forms of the corresponding equation have been displayed. Furthermore, the stable configuration of the analogous equation is shown in the absence of the stimulated force.

Different controllers for suppressing oscillations of a hybrid oscillator via non-perturbative analysis

“…For the amplitude of the control vibration, when the values of are improved, the peak of the curve grows up as illustrated in Fig. 16 b on FRC curves earlier 15 , 24 , 25 , 37 , 38 , 41 .…”

“…By making use of the modified HPM, the stability analysis of the perturbed pendulum motion was investigated 22 . In accordance with He’s frequency formulation, throughout the areas of fluid mechanics and dynamical system; two recent works were provided 23 , 24 . Vibration alleviation and energy collecting in a dynamical system of a spring-pendulum were performed 25 .…”