Part 2. Estimation of uncertainty of the results of indirect measurements of the amplitude information signal.

A. The purpose of the work

1.1. To study the main types of uncertainties of the results of indirect measurements of physical quantities, a methodology for assessing the uncertainty of type A and type B.

1.2. As a result of an experiment to evaluate the uncertainty of the amplitude coefficient type A and type B (to define a standard, and the total extended uncertainty).

2.Key positions

2.1 Initial data for calculation of H A Type A statistical series are measured input variables: {x q} (where q = 1,..., m). Standard uncertainty of type A of indirect measurements of PV is determined according to expression (2) and (3).

2.2 The overall standard uncertainty (H c A) in the case of uncorrelated estimates of indirect measurements of ejection fraction determined by the formula (4).

2.3 Assessment of the uncertainty of indirect measurements of type B (H Su) in the case of uncorrelated estimates x 1,..., x m is given by (13).

2.4 In the case of correlated estimates of the calculations are performed using the formula (5).

2.5 The resulting standard uncertainty is determined by H and H with A to B by the formula (14).

The expanded uncertainty of 2.6 H p is given by multiplying the resulting standard uncertainty of the measurement result by k (equation (15)), where k - enrollment ratio (numerical factor used as a multiplier when combined standard uncertainty for the expanded uncertainty). To this end, enrollment ratio k in accordance with the expression:

,

where v eff - the effective number of degrees of freedom, defined by the formula:

.