Question 1 A linear process is controlled by means of a P controller. In an experiment on the closed loop, the reference changes from 20% to 45% at t = 5 s. The actuator output and the process output are measured, the results are represented in figure 1 (all signals are given in % FSD of sensor or actuator). 70 60 65 55 60 50 55 on 245 50 40 45 35 40 35 0 2 6 8 10 12 30 0 14 2 6 8 10 12 14 t t Figure 1: Results of the experiment performed on the closed loop. Questions: (a) What are the values of the bias and the proportional band of the used P controller? (b) Draw the static process and control characteristic for the case where the reference value is equal to the one for which this bias was chosen. Use one of the graphs on the back of this page! (e) if the maximally allowed steady state error is 10% FSD, which values the reference can take on if all other parameters and the disturbances remain the same? Question 1 A linear process is controlled by means of a P controller. In an experiment on the closed loop, the reference changes from 20% to 45% at t = 5 s. The actuator output and the process output are measured, the results are represented in figure 1 (all signals are given in % FSD of sensor or actuator). 70 60 65 55 60 50 55 on 245 50 40 45 35 40 35 0 2 6 8 10 12 30 0 14 2 6 8 10 12 14 t t Figure 1: Results of the experiment performed on the closed loop. Questions: (a) What are the values of the bias and the proportional band of the used P controller? (b) Draw the static process and control characteristic for the case where the reference value is equal to the one for which this bias was chosen. Use one of the graphs on the back of this page! (e) if the maximally allowed steady state error is 10% FSD, which values the reference can take on if all other parameters and the disturbances remain the same