SU999070A1 - Physical field simulating device - Google Patents

Description

(k) DEVICE FOR MODELING PHYSICAL

one

The invention relates to analog computing and can be used to solve field theory problems. The invention can be applied in the study of physical fields with small gradients.

A device for solving physical fields is known, which contains a block for specifying boundary conditions, a mesh model .Cl 1 However, such a device is not effective for modeling fields with small gradients.

Closest to the invention is a model comprising a block of boundary conditions, the output of which is connected to the nodes of the first grid model and the second grid model 2.

A disadvantage of the known model is the lack of accuracy of modeling.

The purpose of the invention is to improve the accuracy of modeling.

of fields

This goal is achieved by the fact that a block of operating forces is entered into a device for modeling physical fields, which contains a block of boundary conditions, the output of which is connected to the boundary nodes of the first grid model, and a second grid model; castles, the outputs of which are connected to the corresponding boundary nodes of the second grid model, block inputs

10 operational amplifiers are connected respectively to the internal nodes of the first grid model, which are located along the contour of the studied area.

15

The drawing shows a block diagram of a device for modeling physical fields.

Claims (1)

The device contains the first grid model 1, boundary nodes 2, circuit 3, the second grid model 4, block 5 of operational amplifiers, operational amplifier 6, area under study 7, base points biv, block 9 of boundary conditions. On the grid model 1, on the border. 2 of which boundary conditions are specified, select the contour 3, which covers the region 7 of the desired differences and is at a sufficiently close distance from it, so that the voltage drops are still clearly distinguishable. This area is modeled using a separate grid model k. In this case, the range of variation of the boundary conditions is assumed to be equal to the range of setting the boundary conditions at the boundary 2 of the network model 1. The boundary conditions are set. Thus, the maximum differential of the boundary conditions corresponds to the maximum differential. The magnitude of the boundary conditions for the remaining drops is determined using direct forwarding and. (,) Dumox — the current value of the voltage of the boundary conditions of the first kind; maximum voltage for setting boundary conditions of the first kind; voltage drop across the region; maximum voltage drop. Due to the change in the magnitude of the scale factor KdeyT, the drop in physical magnitude, the values of the parameters of the new grid model will be different, although the step may remain the same as on the grid model 1. This modeling method implements some electrical expansion of the model area under investigation to the maximum possible boundary conditions. At the same time, increased voltage perapadas on the grid model l correspond to the same differences of physical quantity, which are modeled by the area bounded by circuit 3. In the proposed device for block proportional voltage drop across circuit 3 amplifiers transfer coefficients are set in accordance with the above method, K C gv-c JNVOKC 9 04 In this case, formula (1) will have the form u, k -or, from the outputs, the voltage gains go to the boundary points of the grid model t, Then The boxes lying on contour 3 and the boundary points of the grid model are in one-to-one correspondence. Points 8 and 8 are basic. With respect to point 8, voltage drops are set at the inputs of the amplifiers. Point 8 is connected to the smallest source of setting boundary conditions. Since in most cases the lowest value of the voltage for setting the boundary conditions is zero, point 8 can be connected to the bus of zero potential. The boundary conditions along contour 2 of grid model 1 are specified by a block of 9 boundary conditions. Thanks to the entered block and the new links between the blocks, the accuracy of modeling has increased. . An apparatus for modeling physical fields, comprising a block of boundary conditions, the output of which is connected to the boundary nodes of the first grid model, and a second grid module, characterized in that, in order to improve the accuracy, operational amplifiers are introduced into the device, the outputs of which are connected to the corresponding boundary nodes of the second grid-model, the inputs of the block of operational amplifiers are connected respectively to the internal nodes of the first grid model, located along the contour of the area under study. Sources of information taken into account in the examination of 1, Nikolaev N, S. and others. Analog mathematical machine USM-1 for solving boundary problems of equations of mathematical physics. M., Mashgiz, 1Eb2, p. 235-239. 2, Volynsky B. A, and Bulman V, N. Models for solving boundary value problems. M ,, Fizmatgiz, 1969, s, (prototype). If. 71