Normal pressure
pressure range in hydraulics is referred to as the medium pressure range , although this is associated with higher pressure levels.
Integral hydrostatic transmission
Hydrostatic transmission involving a pump combined with a motor in a block design. In general, stationary forms of hydrostatic transmission are designed as an integral hydrostatic transmission whereby
Programming
Covers the activities associated with devising, coding and testing a computer program (EDIN 19 226, Part 5). In a narrower sense therefore, the word describes the creation of a detailed algorithm in a
Driver
Functional element, which converts a low-voltage signal into a signal with a higher power. That applies both to the power section and the signal processing, where a voltage signal is converted into a current
Quantisation
variable into a discrete representation. In general, therefore, this means quantising an amplitude, with the amplitude area divided into smaller subsections. The process is known as digitalisation and uses
Null range of a proportional spool valve
With proportional spool valves, the overlap/underlap at the individual control edges of the valve (overlap/underlap conditions) determine the flow rate signal characteristic curve ( Figure N 6 ) and the
Errors in a control
definition of a dangerous error in a control can only be derived from the interaction of the control with the device to be controlled. Here both active errors (e.g. unintended placing in operation) and also [...] long as both circuits work, the failure is not noticed, however if one circuit fails the other fails with it.
Programmable logic controller (PLC)
be equipped with control units which work by bits or by words (EDIN 19 226 T 5). In contrast to the hard-wire programmed control, the PLC has application-independent standard hardware with application
Rate of pressure rise
bar/s and defines, e.g. on pumps, the amplitude of the pressure pulsation-induced oscillations and with it also the amount of noise.
Geared pump/motor
Hydraulic pump/motor with two or more gears working together in one housing. They may take the form of an external geared pump/motor , an internal geared pump/motor or an annular gear pump/motor .