Hysteresis in a piezoelectric actuator must be compensated for, and this compensation constitutes the main challenge high-precision motion control of piezo-actuated stages. This paper presents an output-feedback sliding-mode (SMC) scheme to suppress unknown nonlinearity; scheme, hysteresis behavior is considered external disturbance, complex models are thus not required. The functions absence t...

Controlling heating, ventilation and air-conditioning (HVAC) systems is crucial to improving demand-side energy efficiency. At the same time, thermodynamics of buildings uncertainties regarding human activities make effective management challenging. While concept model-free reinforcement learning demonstrates various advantages over existing strategies, literature relies heavily on value-based ...

This paper establishes a model-free finite-time tracking control of nonlinear robotic manipulator systems. The proposed controller incorporates both time delay estimation (TDE) and an enhanced terminal sliding mode (TSMC). improved TSMC scheme is devised using fractional-order (FOTSMC) proportional-integral-derivative (PID) to obtain robust high performance. TDE designed estimate the unknown dy...

This paper proposes a novel online measurement-based Wide-Area Voltage Control (WAVC) method using Phasor Measurement Unit (PMU) data in power systems with Flexible AC Transmission System (FACTS) devices. As opposed to previous WAVC methods, the proposed does not require any model knowledge or participation of all buses and considers both active reactive perturbations. Specifically, exploits re...