PID H∞ Designer

PID H∞ Designer is the first advanced, easy-to-use web-based tool for the analysis and analytical design of a wide class of controllers, including PI, PD, PID, PR (proportional–resonant), Lead–Lag, RC (repetitive control), SP (Smith predictor), and many other industrial controllers, all based on H∞ performance and robustness constraints. The designed controller can also be improved using a preselected compensator in either series or parallel connection. In the parallel case, it offers a way to iteratively improve the resulting solution. It also supports model sets derived from commonly used identification experiments, including the moment model set provided by the PIDMA autotuner. Another option to obtain the system transfer function is to use experiment input–output datasets and identify the corresponding transfer function.

The principles of this tool rest on an analytical method based on H∞ specifications for the design of fixed-structure controllers with two tunable parameters. Unlike conventional design approaches that rely on numerical optimization, it employs an analytical computational procedure to transform various H∞ design constraints into the boundary of the H∞ region in the controller’s parametric plane. The H∞ specification can also be extended with requirements related to the damping of resonant modes (σ-stability, ξ-damping). By intersecting regions in the parametric plane, both single- and multi-model designs can be performed while simultaneously enforcing several constraints. The design procedure can be carried out iteratively, which improves the controller’s performance and may increase its order.

Detailed information can be found at: www.pidlab.com. The subscription for PID H∞ Designer can be purchased from our e-shop.