The hydraulic piston cylinder device is a fundamental component of many motion control systems. Hydraulics can generate large forces over large distances, which is necessary for big motion platforms...

The hydraulic piston cylinder device is a fundamental component of many motion control systems. Hydraulics can generate large forces over large distances, which is necessary for big motion platforms such as flight simulators. The ideal form of the device shown is a transformer, as indicated in the bond graph.

An actual device has inertia, friction, leakage past the piston, and compliance of the volumes of oil on both sides of the piston. For the realistic effects shown, construct a bond graph model and assign a power convention.