For industrial, automotive, and aeronautical applications, hydraulic actuators and hydraulic valves have an essential role to deliver and regulate forces and moments. The evolution of hydraulic systems to cover the demands of Industry 4.0 through the digitation of hydraulic valves makes the automatic control of hydraulic actuators crucial for production lines and processes. This book focus on automatic control algorithms for hydraulic actuators (robust tracking controllers, flatness-based control approach, optimized fuzzy sliding mode controllers, neural network and nonlinear disturbance observers)