Tune PID controller with H∞ Designer and significantly improve performance and robustness of process control
PID H∞ Designer is the first advanced tool for analysis, design and tuning of optimal PI and PID controllers with respect to integral criteria IE, IAE, ITAE and H∞ robustness constraints on the four weighted sensitivity functions i.e. sensitivity function, complementary sensitivity function, input and output sensitivity function.
For a long time, the development of PID controller design methods has been the goal of the control community. Despite that a manual model-free tuning of controllers is still the most commonly used PID design method in the industry.
A rational way to design a controller is to derive a process model and a collection of requirements on the closed loop. PID controller design is a trade-off between conflicting criteria, such as load disturbance attenuation, set-point tracking, robustness, and noise sensitivity. It would be desirable to have a design method which capture engineering criteria such as load disturbance response, robustness to model uncertainties, rejection of measurement noise, and set point tracking. Traditional tuning rules in PID control do not consider all of these aspects in a balanced way which is a considerable drawback.
To address all these drawbacks, an original tool has been developed. It is called PID H∞ Designer or PID Hinf Tuner.
M. Brabec and M. Schlegel, "Analytical Design of a Wide Class of Controllers with Two Tunable Parameters Based on H∞ Specifications," 24th International Conference on Process Control (PC), Štrbské Pleso, Slovakia, 2023, pp. 221-226, doi: 10.1109/PC58330.2023.10217459.
M. Brabec and M. Schlegel, "Analytical Design of Controllers with Two Tunable Parameters Based on H∞ Specifications for Dead-Time Systems," 25th International Conference on Process Control (PC), Štrbské Pleso, Slovakia, 2025, pp. 1-6, doi: 10.1109/PC65047.2025.11047354.
Main advantages and benefits
PID H∞ Designer is applicable to a wide range of systems: unstable, non-minimal phase, time-delay and arbitrary order systems are supported.
PID H∞ Designer uses the original model based H∞ design method. For the PI controller it provides a complete solution to the design problem: either it finds all suitable controllers and highlights the optimal one or determines that no controller of the required properties exists.
PID H∞ Designer is compatible with the common two or three-parameter model from step response and also with the moment model set provided by PID autotuner (PIDMA) from REX Controls.
Supported design specifications reflect the essence of real control problems i.e. optimization of integral criteria IE, ISE, IAE, ITAE under H∞ constraints is supported for both load disturbance attenuation and set-point tracking problems.
Designing of PI and PID controllers with typical specifications using PID H∞ Designer is an intuitive procedure that does not require deeper knowledge of control theory from the user.
With more skill and effort from the user it is be possible to design high performance PID controllers extended with any suitable linear compensator: Smith predictor, resonant controller, repetitive control, … .
PID H∞ Designer is available interactively online with a standard web browser, no need to install anything locally.
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