Adaptive Event-based Design of Nonlinear Systems with Unknown control Directions

This paper provides an adaptive design based on event-based control with unknown control directions. Nussbaum-type functions are used to address the problems associated with nonlinear systems' unknown control directions. An event-triggered mechanism, which is based on the measurement error defined by the control signal, is presented to reduce the number of controller updates and save transmission resources. The dynamic surface control is incorporated into the controller architecture to prevent the complexity explosion. Finally, the effectiveness of the designed strategy is assessed using the simulation.