Incremental encoder
Increments are delivered in the form of electrical pulses and are added together with the same preceding sign in accordance with the direction of movement. What the counter shows is indicative therefore of
Viscosity index (VI)
Characterises the Viscosity/temperature characteristic of a fluid. The smaller the change in viscosity with respect to temperature, the higher the VI (CETOP RP 100). The VI is mathematically calculated (DIN [...] (DIN ISO 2909) and for the "conventional" mineral oils it lies between 95 and 100 and for oils with a flat VT curve ( HV oils ) it is around 160 and above.
Leakage compensation
oil leaking out. This is achieved, for example, using a pump with a pressure controller or a small pump or even a hydraulic accumulator , with the dimensions of both reflecting the amount of oil being leaked
Electric signal technology
Signal area in which the signal input , signal linking and signal processing are with electrical components. These are predominantly switches, relays and contactors. Electric signal processing has become [...] elements contain moving parts that are subject to wear and also require relatively long switching times with a large space envelope.
Acceleration feedback
Is used to stabilise closed circuit position control systems and together with velocity feedback has an optimal action in these circuits. On poorly damped drives (such as hydraulic drives) acceleration [...] possible significantly higher loop gain than P controllers . However, this advantage drops off quickly with increasing damping. Acceleration feedback requires a control element that is as fast as possible.
Equivalent time constant
to the intersection of the inflection line with the abscissa and the Settling time T g as the time defined by the intersections of the inflection tangent with the abscissa and the value in the steady state
Adaptive control
tools with the objective of safeguarding and optimising the process. It is characteristic that fluctuations in process variables that cannot be predicted in advance are measured in parallel with the process
Standard cylinder
Hydraulic cylinder mass-produced in accordance with the relevant standards. These are the nominal pressures as per ISO 3322, diameter of cylinder bores and piston rods as per DIN ISO 3320, surface ratios [...] 7181. In addition, DIN ISO 4313 sets out a preferred range for piston strokes, although compliance with these is not always possible.
Paraffin base oil
aromatic content; they are associated with good lubricating performance and favour high loads during continuous operation. They only cause materials for seals with a low acrylonitrile content (typically
Separate circuit hydraulic
on simple drives and in systems with several drive elements, if malfunctions are to be expected due to mutual interaction. Other hydraulic systems: fluid power systems with main pipe , centralised hydraulic