Kepka, JNonlinear system analysisCompute and draw phase portraits using Matlab or other simulation software of one or more of the following nonlinear dynamical systems: buckling beam (eq. 1.17 Sastry), pendulum (eq. 1.16 Sastry), violin string (eq. 1.21 Sastry), or other interesting example found in the literature. Vary parameters of chosen system in order to obtain meaningful features, like: obtain stable and unstable equilibrium points, obtain limit cycles, etc. Explain in detail shown results and justify results and your conclusions. pendulumnonlinear systemphase portraittrajectory20082008-06-06