I thought I would ask you a question as I have been having some questions in creating a block diagram using MPC controller in simulink. My predecessor in my research put (target value - output from control target) plus (-1/s) into md (measurement disturbance), but I don't understand what this process is doing. If anyone can help me, I would appreciate an answer. If it is easier to understand if you provide a detailed block diagram or other information, I will provide it later. Thank you in advance for your cooperation in this matter.