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manual operation) or as 3-piston pumps for pressurised water operation . Pumps with banked pistons/in-line piston pump with multiple pistons are now worthless.

are linear relationships within the . As well as the controller (linear controller), the model ( model of open loop system ) for the controlled subsystem must also behave in a linear manner. Linear control [...] mathematical description of the transfer function of controlled subsystems and . Linear control theory may only be applied to non-linear relationships therefore if at the operating point linearisation has already

Filter to be installed into the return line of a system. The housing is designed for pressures of around 20 to 30 bar. Return line filters – regardless of the size of the pump flow rate – must be selected

and operating speed), while the number of steps define the position. With such electro-hydraulic linear amplifiers position accuracies between 0.002 and 0.01 mm can be achieved.

Hydraulic fluid line for control tasks.

between input variables (system variables) and output variables ( correcting variables ) is a linear one. Linear regulators also include both single loop controllers (P, PI, PID controllers and the like) [...] controllers , cascaded (multi loop) control systems ). (see also controller types ) Opposite: non-linear control system .

which accommodate continuous lines. As a rule, the collective line includes the feed line and return line as well as the overflow oil line. In addition, there may also be control lines .

Device which generates a linear movement directly. This is the hydraulic cylinder as hydraulic linear motor and the solenoid or electric linear motor in electric drives.

A transfer element may be referred to as linear if the law of superposition (superposition principle) applies. Linear elements may therefore be split into parallel elements whose output signals are added [...] proportionality between input and output signal. Linear elements are ideal, for example, as gear transmissions or potentiometers. The typical characteristics of a linear transfer element are independent of the

ic curve ), whose course deviates continuously or intermittently from a straight, line is approached by straight line at a certain operating point. Success depends on what is still permitted in terms of [...] curve ( Figure L 20 ). Of a function : Non-linear functions are tending to be supplanted — particularly for calculations within a specific interval — by linear functions (or even by simple mathematical [...] element with a non-linear characteristic curve is supplemented to such a degree by the addition of further transfer elements that a new transfer element emerges with an overall linear characteristic curve