show that the nonlinear example dy/dt = y2 s solved by y = C/(1-CI) for every...
1. Identify each of the following equations as linear or nonlinear and also determine their order dy (a) y = t 3 3 (b) ( dy + (c) sin t (d) (1y) sin t ( cos2 t 1 y sin(t)= 0 (e) Int +3etdy dt (f) 2y'-y2 =e (g) y"(t2 1)y+cos(t (h) y"sin(ty)y(t21)y 0 = 0
1. Identify each of the following equations as linear or nonlinear and also determine their order dy (a) y = t 3 3 (b)...
Question 410 marks Consider the nonlinear system ェ=(1-y)2(4-12), ỳ=(1-z)y(y2-4) (0<x<2, o<y<2), which has a single fixed point at (1,1) (a) Show that the following expression for K(x, y) is a constant of motion for this system: K(x, y)- 2 ln(ry) + Inl( 2)(y- 2)]-3In(2)(y+2)]. (b) Use the constant of motion to show that the fixed point is a centre of the nonlinear system.
Solve IVP
23·-=-5x-y dt dy = 4x-y dt x(1) = 0, y(1) = 1
Calculate and sign the tax multiplier (dY/dt) in the following model. Y = C[(1-t)Y] + I[ i ] + G M = L[i, (1-t)Y]
Solve for y(t). dy/dt + 2x = et dx/dt-2y= 1 +t when x(0) = 1, y(0) = 2
(1 point) It can be helpful to classify a differential equation, so that we can predict the techniques that might help us to find a function which solves the equation. Two classifications are the order of the equation -- (what is the highest number of derivatives involved) and whether or not the equation is linear Linearity is important because the structure of the the family of solutions to a linear equation is fairly simple. Linear equations can usually be solved...
Example: Consider the system Y(s) =G(s) =s2 d'y dt y-u()U(s) and determine the feedback gain to place the closed-loop poles at s--1ti. Therefore, we require that α2-2. With xrV and x-dy/dt, the matrix equation for the system and αι G(s) is dy d2y 2dt2 Dorf and Bishop, Modern Control System Problem: Given the plant G(s)-20(s+5)/s(s+1)(s+4) design a state-feedback controller to yield 9.5% overshoot and a settling time of 0.74 sec. Solution: 1) Determine phase-variable state-space representation:
2 + COS- 2.ry dy d 1+y2 = y(y + sin x), 7(0) = 1. 3. [2cy cos(x+y) - sin x) dx + x2 cos (+²y) dy = 0. 4. Determine the values of the constants r and s such that (x,y) = x'y is an Integrating Factor for the following DE. (2y + 4x^y)dr + (4.6y +32)dy = 0. 2. C = -1 You need to find the solution in implicit form. 3. y = arcsin (C-cos) 4. r=...
(Example 7.2.4) Use the Laplace transform to solve the initial-value problem 6. dy + 3-13 sin 2t, dt y(0)-6
Solve the system of differential equations dx/dt = x-y, dy/dt = 2x+y subject to the initial conditions x(0)= 0 and y(0) = 1.