This paper presents a set of autotuners for single input-output systems with time delay. Autotuners represent a combination of relay feedback identification and some control design method. In this contribution, models with up to three parameters are estimated by means of a single asymmetrical relay experiment. Then a stable low order transfer function with a time delay term is identified. Contr...

This paper investigates the robustness of a time delayed system controlled by a PI controller with a Smith Predictor used to compensate the dead time. A heat exchanger process is used as a test bed for the proposed control structure. Feed-forward control is used to compensate for the disturbance effect. The effectiveness of the design procedure is tested using Matlab-Simulink models and frequen...

The objective of this work is to formulate and demonstrate the methodology of multi-models for improving the performance of existing advanced control strategies. Multiple models are used to capture the nonlinear process dynamics relating to gain and time constant variations. The multi-model strategy was implemented on several controllers such as Smith-Predictor using PI (Proportional-Integral) ...

This paper deals with a novel method of continuous-time model-predictive control for nonlinear time-delayed systems. The problems relating to time delays are solved by incorporating the Smith-predictor scheme in a control-law derivation. A nonlinear-mapping approximation, employing either continuous piece-wise linear functions or a fuzzy system, is also an integral part of the control scheme, a...

Congestion control is a fundamental building block in packet switching networks such as the Internet due to the fact that communication resources are shared. It has been shown that the plant dynamics is essentially made of an integrator plus time delay and that a proportional controller plus a Smith predictor defines a simple and effective controller. It has been also shown that the today runni...

When a mobile robot uses vision for self-localization and obstacle avoidance, the results of image processing become available after a variable computational delay. If the robot keeps moving during image processing, results become available after the robot has left the position where the image was taken. This is the problem of control in presence of intermittent delayed feedback. This paper pro...