Phase shift
Refers to the shift, expressed as the angle φ, between two sinusoidal variables or signals with the same angular frequency ω such as the input and for a transfer element . The phase shift is described
Mechanical feedback
the moving part of the device to be controlled for the purpose of . Example: Two stage servo valve with flapper-nozzle system : here, a feedback spring (tube) is stretched while the valve control spool
Load-holding valve
In accordance with ISO 1219-1 load-holding valves are classed in the group of pressure control valves. They prevent double-acting consumers (such as hydraulic cylinders and hydraulic motors) that have
Measurement uncertainty
DIN 1319). Figure M 16 shows these relationships based on the example of possible errors associated with a position measurement system.
Filter disposition
some circumstances a pressure filter to protect a servo valve and a matched breather filter . Along with the considerations in relation to the installation location, also considerations on the filter size
Single acting cylinder
single-acting cylinders have only one effective piston area. Single acting cylinders are mostly equipped with plunger pistons . However they can also be formed by the single sided application of pressure to a
Three chamber valve
4/3 directional valve with three annular channels in the housing for the three ports A, B and P (Figure D 42) . The 4th port T is to the spring chambers F1 and F2 that are connected together via a connecting
Operating system
1. program in a digital computer system that together with the characteristics of the computer system forms the basis for the possible operating modes of the digital computer system and in particular controls
Filter efficiency
by: It is superfluous if the β value is used. The efficiency of the complete filter includes, along with the efficiency of the filter element, also the flow losses, if necessary including the bypass valve
Bode diagram (frequency characteristics)
. Based on the Bode diagram for a controlled subsystem it is straightforward to find a controller with which a stable control circuit can be assembled.