System identification applied to stiction
quantification in industrial control loops: a comparative study, Journal of Process Control 46: 11-23.
The results show that the use of a disturbance observer significantly reduces torque tracking errors due to stiction
and model uncertainty.
Q I know that stiction
can cause problems in pneumatic valves and cylinders, but what causes the
A higher dimensional accuracy reportedly contributes to a reduction of stiction
errors in the packaging process.
Operators concerned about cross-contamination will appreciate the pipettes' reduced stiction
(piston stickiness), which helps eliminate splash up.
By communicating the actual valve position, process engineers are able to check for valve stiction
, which can increase operating costs and compromise process quality.
On the other hand, as the temperature of the gas in the cylinder decreases, the volumetric efficiency can also decrease as a result of the delay in the opening of the suction valve due to the combined effect of refrigerant outgassing from the lubricant oil and valve stiction
(Khalifa and Liu 1998).
In very small objects, this force can cause moving parts to stick together, an effect known as stiction
Diamond films are less prone to failure because they are low energy surfaces and are not prone to stiction
The type of metal used for the contacts affects eventual degradation and on-resistance and, to a degree, stiction
, backlash and dead band, stiction
is one of the most common and long-standing problems in process industries.
As shown in Figure 2, most CAPM programs, such as Matrikon's ProcessDoctor, will convert real-time measurements of controller operating mode, present value, set point and output into daily indicators such as variance index, oscillation index, valve stiction
index, utilization index, economic performance index, etc.