Servo drive
In general : Drive elements activated by an amplifying auxiliary force (e.g. power steering, servo brake). In fluid technology : Collective term for an automatic drive system, which contains a power a
Polymer materials
Macromolecular materials whose molecules are made up of simple, repeated molecular units (blocks). Their number determines the level of polymerisation. The materials used in fluid technology in terms
Small signal range
The input signal U E for a device (e.g. high response proportional valve) or a system (e.g. control circuit) generally covers a range of U E = 0->U Nominal (max. signal). For high response proportiona
Angular corner frequency ω E
Given by the corner frequency f E as:
Control cylinder
Cylinder to trigger a control function (e.g. to actuate a limit switch in a pressure switch ).
Programming methods
Describes the methodical and systematic approach to generating programs . A distinction can be made between direct and indirect programming methods ( Figure P 17 ): In addition to manual programming,
Electrohydraulic torque amplifier
Hydraulic drive unit operated electrically using a stepper motor or DC motor with integrated control unit ( following control valve ) and integrated, mostly mechanical feedback . The following control
Shaft load in a displacement machine
Size (possibly limit value) of the axial and/or radial load of the shaft of hydraulic pumps or hydraulic motors .
Safety control circuits
Circuit arrangement to prevent undesired actuations or to protect against overloading. The safety elements required for this, such as valves with a redundant design, electrical monitoring of switching