Transcription of Second Order Differential Equations
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3 Second Order Differential EquationsWe now turn to Second Order Differential Equations . Suchequations involve the Second derivative,y (x). Let s assume that we canwrite the equation asy (x) =F(x,y(x),y (x)).We would like to solve this equation using Simulink. This is accomplishedusing two integrators in Order to outputy (x)andy(x).input outputy y (b)input outputyy (a) outputyy input y (c) : Basic schemes for usingIntegrator blocks for solving secondorder Differential shown in (b), sendingy (x)into theIntegratorblock, weget outy (x). This is similar to usingy (x)to gety(x)in (a). Asshown in (c), combining twoIntegratorblocks, we can inputy (x) =F(x,y,y )and get outyandy.
second order differential equations 45 x 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 y 0 0.05 0.1 0.15 y(x) vs x Figure 3.4: Solution plot for the initial value problem y00+ 5y0+ 6y = 0, y(0) = 0, y0(0) = 1 using Simulink. Recall the solution of this problem is found by first seeking the
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