Strain and stress are the result when it comes to external forces that are applied to a non-moving object. Strain is defined as the amount of deformation that an object experiences compared to its original size and shape (the ratio of increase in length regarding original length) .
Vibration can be considered to be the oscillation or repetitive motion of an object around an equilibrium position. Vibrations usually occur because of the dynamic effects of manufacturing tolerances, clearances, rolling and rubbing contact between machine parts and out-of-balance forces in rotating and reciprocating members.
Electricity is very hard to imagine because we can not see if a voltage is present or if a current is flowing. If we want water to flow out of a pipe we need some water pressure which is achieved with a water pump. In electricity, our flow is the current, water pressure is the voltage and pump is the battery. This means that the voltage is the cause of the current.
An angular position sensor measures the position of a shaft and converts the position to an analog or digital signal. It calculates the orientation of an object in regards to a specified reference position. There are many different kinds of angular position sensors that are categorized by supply voltage, output type, sensing range, operating temperature range, packaging type and supply current.
GNSS (Global navigation satellite system) is a term used for constellation of satellites providing signals from space. GNSS receivers determine location by using the timing and positioning data encoded in the signals coming from space.