The positioning error between forward scan and backward scan. A closed-loop control is an ideal solution for the problem. Capacitance sensors are normally used in nPoint's nanopositioners to provide feedback signals. It is a non-contact displacement measurement technique, which is hysteresis free.
A characteristic of materials, sensors and sometimes instruments to make their behavior dependent on the immediate history to which they have been subjected. Typically the final settling point is different when approached from above to when it is approached from below
Hysteresis is a measurement of an electrical component's change in performance as a result of continued operation. When a component is operated for the first time (for example, a temperature sensor reading temperature from cool to warm), it will follow a particular curve. When you then move the system in the opposite direction (say, change the temperature back to cool), the component will follow a similar curve back to its original state, but slightly displaced from the original curve, like so: More details