One potential limitation of the PETC approach compared to other control strategies is the need to carefully design the triggering mechanism to ensure system stability and performance. The periodic evaluation of the triggering function may introduce delays in the control action, which can impact the system's response time. To address this limitation, the triggering conditions can be optimized to minimize the delay while maintaining stability. By fine-tuning the parameters of the triggering function and adjusting the sampling rate, the PETC approach can mitigate the effects of delays and improve the overall control performance.
Another drawback of the PETC approach is the sensitivity to parameter variations and uncertainties in the system. Changes in the system parameters or external disturbances can affect the triggering mechanism and lead to suboptimal control performance. To overcome this limitation, robust control techniques, such as robust event-triggered control or adaptive event-triggered control, can be implemented within the PETC framework. These methods can enhance the system's robustness to uncertainties and variations, ensuring reliable control in the presence of disturbances.