outline the foundamental difference between errors that can be largely eliminateed and errors that can not be eliminated
Theory and Design for Mechanical Measurements
Measurement is a term that refers to analyzing a manufactured component regarding the degree of accuracy for dimensions, tolerances, geometric profile, roundness, flatness, smoothness, etc. Measurement always involves comparing the manufactured component or the prototype with a standard specimen whose dimensions and other parameters are assumed to be perfect and do not undergo changes with respect to time.Precisely in mechanical engineering the branch that deals with the application of scientific principles for measurements is known as metrology. The domain of metrology in general deals with various measurements like mechanical, chemical, thermodynamic, physical, and biological measurements. In mechanical engineering, the measurements are limited to mechanical specific such as length, mass, surface profile, flatness, roundness, viscosity, heat transfer, etc.
Basic principles of engineering metrology
Metrology is described as the science of measurement, precision, and accuracy. In other words, it is a method of measurement based on units and predefined standards.
outline the foundamental difference between errors that can be largely eliminateed and errors that can not be eliminated
Error- The difference between the true value and the measured value is called error. Errors are not always due to mistakes, it may be due to the coincidence.
There are two types of errors: random and systematic.
Random error : These are occurs by chance. It is due to the variation in measurement. Random errors generally caused by fluctuations in an instrument, the environment, or the way a measurement taken. It may be same or different.
Systematic error gives measurements that are consistently different from the true value in nature, often due to limitations of either the instruments or the procedure.
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