Onboard-Elektronik
hydraulic valves receive their own electronic control onboard and thus their own intelligence, they can work completely independently and also offer numerous additional functions. The electronic control [...] which reduces data exchange to a minimum and significantly reduces the risk of system overload. The CAN-BUS is often used for networking in mobile machines. In stationary applications in industrial environments
State controller
jointly optimised ( Figure Z 10 ). If the state variables cannot be measured for technical reasons, they can be introduced by status monitors . In the case of the closed loop position control systems in fluid [...] pilot control behaviour and interference response ( Figure Z 11 ). The observer control technology can also be used in the case of non-linear controllers ( Figure Z 12 ).
Accumulator drive
peaks. This can be used to select the flow rate Q 1 of the pump according to the average consumption V N during a working cycle t S: ( accumulator consumption diagram ). Multiple consumers can be operated
Special gear pump
bushings (Figure B 25) . At the same time the bearing load becomes smaller because the suction chamber can be increased in size. At pressures of around 150 to 200 bar special gear pumps still have good efficiency
Grooved ring seal
Oldest form of elastic seals . They can be used as two lip seals for sealing at the inner and outer ring (Figure N 9 a) or as a single-lip ring with an adhesive section for single-sided sealing. The sealing
Selsyn rotary position encoder
windings and with an output voltage that corresponds to the angular position of the rotor. The stator can comprise three separate windings offset by 120° (synchro) or two windings offset by 90° in relation
Surface filter
filter element. Surface filters are designed with pores (gap) of a similar size, which means they can retain certain sizes of particle almost completely. However, they only have a small dirt holding capacity
Control concept in fluid technology
Controls can be designed in very different ways and with highly different controller structures to achieve a certain pilot control behaviour . It then becomes a case of control concepts. The control concepts
Internal feedback control
position of the control element in the device. During this process mechanical or electrical feedback can be provided. Similar device-internal feedback controls are also used in flow valves or pump adjustments
Linearity error
lines) and the actual characteristic curve for the measuring instrument. The size of the deviation can be determined in various ways ( Figure L 22 ): Fixed point method: both end points are connected to