The Identification of Nonlinear Systems Using 𝐶_(𝑡)-𝐾_(𝑡) Plane Coordinates

Figure 8

Using the time-domain displacement response for the simulation experiment to solve the 𝐶_(𝑡), 𝐾_(𝑡) values, which are both functions of time. (a) The time-domain displacement response is 𝑥. (b) The velocity response is 𝑣, which is the numerical differential of 𝑥. (c) The acceleration response is 𝑎, which is the numerical differential of 𝑣. (d) The characteristic trajectory of the motion formula on the 𝐶_(𝑡)-𝐾_(𝑡) plane. (e) The coefficient of stiffness is solved as graph, 𝐾_(𝑡), 𝐾_(𝑡), and is not constant. (f) The coefficient of viscous damping is solvedas graph, 𝐶_(𝑡), 𝐶_(𝑡), and is not constant.

(a)

(b)

(c)

(d)

(e)

(f)