美国麻省理工大学：Estimation and Control of Aerospace Systems（航空系统的估计与控制）：l25

Handout 16: Describing functions, More Eric Feron April 7, 2004 Continuing on the switch nonlinearity 1 G(s) = (s + 1) 3 Equation for the existence of sustained oscillations: 1 Another case: 1 G(s) = s(s + 1) Can there exist sustained oscillations? 2 Computing describing functions for sinusoidal signals Example: Switch nonlinearity Now for the real Math 3 More real math! - Hopefully not too many mistakes 4