Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 4 of 4 for “"Hydraulic Actuation Systems"”.
-
Investigation of Acceleration Dependent Nonlinear Lubricated Friction in Hydraulic Actuation Systems
Lubricated friction issues are central to all hydraulic actuation systems undergoing motion and any in-depth understanding of the nature of lubricated friction will advance future component design. The classic friction models of hydraulic actuation systems under steady state conditions and their …
-
Developement of Piezo-Hydraulic Actuation Systems Technology for use on a Helicopter Trailing Edge Flap
… the performance requirements necessary for actuation of a trailing edge flap for a helicopter main rotor blade. Due to extremely small displacements produced by piezoelectric actuators, their output is amplified several times in order to produce the required displacement for this device. The …
-
Brake-Actuated Steering of Heavy Goods Vehicles
… this, but they rely on heavy and costly electro-hydraulic actuation systems. This dissertation describes the development of a ‘brake-actuated steering’ (BAS) concept to actively steer articulated heavy good vehicles (HGV) using low-cost and lightweight steering technology. The system actuation is …
-
Achieving Efficient Control of Hydraulic Systems Using On/Off Valves
Hydraulic systems offer a range of benefits, such as high power density, ruggedness, linear actuation, and low cost, which have led to the use of hydraulic actuation systems throughout a wide range of industries. However, they also typically suffer from lower efficiency than competing methods of …