Figure 11

From: Digital Signal Processing and Control for the Study of Gene Networks

Figure 11

(A) Block diagram representation of Eq. 37. X(z) is the input, Y(z) is the output, and H(z) is the transfer or system function that processes the input to produce the output. (B) Since the system may have other inputs than X(z) we can redefine H(z) as Hy(z) such that it includes only py, which is independent of X(z). (C) When a system receives desired input signal in the presence of unwanted input or disturbance, the output is affected by both inputs. (D) The effect of such disturbance on the output can be reduced by adding a negative feedback loop and a controller to the system. (E,F) The same mechanism shown in D can be used to reduce of the disturbance effect on yprotein levels. (G) Block diagram representation of Eqs 47 and 48. (H) Steady-state error (the difference or error between target and actual steady-state levels as time goes to infinity) depends on disturbance.