This paper presents the design of a robust controller using the Quantitative Feedback Theory technique for an asymmetric hydraulic cylinder electro-hydraulic servo system based upon a linear, parametrically uncertain model in which some of the uncertainties reflect the variation of the parameters, and taking the external disturbance into account. After the derivation of a realistic nonlinear di...

Electro-hydraulic servo-actuators (EHSAs) are currently considered the state-of-the art solution for control of primary flight systems civil and military aircraft. Combining expected service life a commercial aircraft with fact that electro-hydraulic technology is employed in vast majority in-service planned to be used on future platforms as well, development an effective Prognostic Health Mana...

Electro-Hydraulic Servo-Actuators (EHSAs) are mainly used to command primary flight control surfaces in military and commercial aircraft. Since these devices crucial for vehicle stability maneuverability, a correct assessment of their health status is mandatory. Within this framework, joint research project (HyDiag), held by Politecnico di Torino Lufthansa Technik AG (LHT), aims provide more ef...

High servo control response and high energy-efficiency are requested in hydraulic servo systems of current hydraulic machines. This investigation concurrently implements energy-saving control and velocity-force control for simultaneously realizing high velocity-force control response and high energy-efficiency for hydraulic valve-controlled cylinder systems. The velocity-force control of the hy...

In the bilateral hydraulic servo control system of a construction tele-robot with in-situ force sensing, the p-f type force feedback architecture is liable to result in an impact on the operator hand, and its high amplitude will cause the control unstable. In order to solve this problem an improved force feedback control method with the feature of a T-S fuzzy feedback coefficient, which could b...