Over a series of articles, we generated step test data from a heat exchanger process simulation and then explored details of how to perform a graphical analysis of the plot data to compute values for a first order plus dead time (FOPDT) dynamic model. The claim has been that the parameters from this FOPDT model […]
Step 3 of our controller design and tuning recipe is to approximate the often complex behavior contained in our dynamic process test data with a simple first order plus dead time (FOPDT) dynamic model. In this article we focus on process dead time, Өp, and seek to understand what it is, how it is computed, […]
Step 3 of our controller design and tuning recipe is to approximate the often complex behavior contained in our dynamic process test data with a simple first order plus dead time (FOPDT) dynamic model. In this article we focus on process time constant, Tp, and seek to understand what it is, how it is computed, […]
Step 3 of our controller design and tuning recipe is to approximate the often complex behavior contained in our dynamic process test data with a simple first order plus dead time (FOPDT) dynamic model. In this article we focus on process gain, Kp, and seek to understand what it is, how it is computed, and […]
A previous article presented the first order plus dead time (FOPDT) dynamic model and discussed how this model, when used to approximate the controller output (CO) to process variable (PV) behavior of proper data from our process, yields the all-important model parameters: ▪ process gain, Kp (tells the direction and how far PV will travel) […]