Observer Design for a Core Circadian Rhythm Network

Figure 4

(a) State trajectories of systems (3) and (8) with step input signal 𝑢(𝑡). (b) The error dynamics of system (11). Here, 𝑦(𝑡)=𝑐𝑥₁(𝑡),𝑘=2.5,𝑐=2,and𝑢(𝑡)=0 for 𝑡≤50 and 𝑢(𝑡)=0.1 for 𝑡>50.

(a)

(b)