SU486327A1 - Device for checking blocks of non-linear functions - Google Patents

Description

one

The invention relates to analog computing and can be used to automatically check blocks of nonlinear functions (BNF).

A device for testing blocks of non-linear functions is known, which contains a random signal generator, the outputs of which are connected through the block of non-linear functions to the inputs of the results calculation unit, and the other inputs of the latter are connected to the outputs of the tolerance setting unit.

However, such a device does not provide the possibility of determining reliable values of the BNF errors and the confidence probability of the values obtained.

The proposed device, for the purpose of expanding the functionality, contains an hit determination unit and a unit for specifying the coordinates of the point being studied, the outputs of which are connected to the inputs of the result calculating unit and the hit determination unit. Other inputs: the hit detection unit is connected to the outputs of the random signal generator, and the output is connected to the input of the result calculation unit.

The block diagram of the device shown in the drawing.

The device contains a generator of 1 random signals, a block 2 of nonlinear functions, a block 3 for calculating results, a block 4 for determining the point of entry, a block 5 for setting tolerances and a block 6 for specifying the corodinate of the point being examined.

The device works in the following way. The signals at the outputs of block 6 define the points of the space of input variables, in which the error of the block 2 of nonlinear functions is determined. These signals set the sample values of the output variables of the block of nonlinear functions corresponding to the point being studied. At the moment of getting to the point under study, i.e., at the moments when the values of all input variables of block 2 are simultaneously equal to the values supplied from the outputs

the coordinate setting unit 6 to the hit determination unit 4, a pulse is input to the input of the result calculation unit 3. As a result, in block 3, the tolerance control of the instantaneous values of the signals on

each of the outputs of the block of nonlinear functions immediately for each of the donuts specified from the outputs of block 5.

The results of the tolerance control for all hits to the test point are processed in block 3 of calculating the results according to the specified criteria for estimating the error and at the same time the confidence probability is determined. The test results are obtained as granularities of the error and

confidence probability of obtaining them. So

As random signals are taken as test signals, then the error values at each hit at the test point are also random and the Bernoulli theorem applies, according to which the value of P is determined by the formula

p - a --- Rd)

L (1 - RD) + 1

where N is the number of hits at the studied point; RD is the confidence probability (P- 0.954-0.99).

If it is also specified by the value of P, then the required number of hits in the test point is determined from this formula, and the end of the test is reached when the number of hits is reached.

Acceleration of the verification process at various points in the space of input variables can be accomplished using an auxiliary block of nonlinear functions that reproduces exemplary values of output variables and operates in a static mode. To do this, its inputs should be connected to the outputs of block 6, specifying the coordinates of the point being studied, connected with the inputs of block 4, and its outputs - with the inputs of block 3 calculating the results, instead of the outputs of block 6.

Subject invention

A device for testing nonlinear function blocks, comprising a random signal generator, whose outputs through a block of nonlinear functions are connected to the inputs of a result calculation unit, the other inputs of which are connected to the outputs of a tolerance setting unit, characterized in that

In order to extend the functionality, it contains an hit determination unit and a coordinate point setting unit whose outputs are connected to the inputs of the results calculating unit and an hit detection unit, the other inputs of which are connected to the outputs of the random signal generator, and the output of the hit detection unit are connected to the input of the calculating unit results.