RU169722U1 - DIGITAL DEVICE FOR CALCULATING TRAJECTOR PARAMETERS OF GROUP BALLISTIC OBJECTS - Google Patents

Abstract

The digital device comprises a series-connected unit 1 processing radar information review (RLIO) and block 2 inter-review processing radar information (RLIM). Block 1 of the RLIO at the input is connected to the output of the secondary processing device of the radar station radar station (RLS) and contains block 1.3 for calculating the geometric centers of subsets (RGCP), as well as a series-connected block 1.1 of dividing the set of marks into subsets (ROMP) and block 1.2 ranking. The first output of ranking block 1.2 is connected directly to the first input 2.1 of block 2 of the RLIM, and the second output of block 1.2 through block 1.3 of calculating the geometric centers of subsets (RGCP) is connected to the second input 2.2 of block 2 of the RLIM. Block 2 RLIM, in turn, contains a block 2.3 identification of subsets (OPM), a memory device 2.4 reference points of trajectories (ZUOTT) and block 2.5 calculation of trajectory parameters (VTP). Moreover, the signal input 2.1 of block 2 of the RLIM through block 2.3 of the PFM is connected to the first input of ZUOTT 2.4, the second input of which is connected to the second input of block 2 of the RLIM. The output of ZUOTT 2.4 through the 2.5 VTP block is connected to the indicator display device of the radar image. The display device is made in the form of a display mounted on an automated workstation (AWS) of a radar operator. AWP is made on the basis of an industrial electronic computer (EV) equipped with a control panel in the form of a typesetting field and a manual manipulator of the “mouse” type. The device reduces the likelihood of the formation of false trajectories of group ballistic objects (HBO) issued to the radar user by taking into account the individual characteristics of the trajectories movements of HBO groups, spatial rarefaction and condensation of these groups and resolved ballistic objects in them. 1 s.p. f-ly, 4 ill.

Description

The utility model relates to computing, specifically to digital devices for calculating the trajectory parameters of group ballistic objects (HBO), including the trajectory parameters of individual elements and clusters of elements in the HBO.

Known tools / 1-15 / for calculating the trajectory parameters of HBO containing software and algorithmic calculators for primary and secondary processing of radar information (RLI), based on the strobe / 2, p. 294-297 / processing of radar signals.

A disadvantage of the known means is the increased likelihood of the formation of false HBO trajectories issued to the radar user.

It is desirable to reduce this probability by taking into account the internal spatial structure of HBO.

Means that provide a solution to this problem in the prior art on the indicated principle have not been identified.

The objective of the utility model is to reduce the likelihood of the formation of false HBO trajectories issued to the radar user.

The technical result that provides the solution to this problem is the creation of a digital device for calculating the trajectory parameters of HBO with a reduced number of false paths by taking into account the individual characteristics of the trajectories of the HBO groups, spatial rarefaction and thickening of these groups and resolved ballistic objects in them.

Achieving the claimed technical result and, as a result, solving the problem is characterized by the fact that the digital device for calculating the trajectory parameters of group ballistic objects (HBO) contains serially connected review radar information processing unit and radar information inter-review processing unit.

In turn, the review radar information processing unit contains a series-connected unit for dividing the set of marks into subsets, a ranking unit, a calculation unit for the geometric centers of the subsets, the ranking unit being connected at the second output to the subset identification unit.

The inter-survey radar information processing unit contains successively included subset identification unit, a storage device for reference points of the trajectories, and a unit for calculating the trajectory parameters.

This embodiment of the series-connected unit for processing the radar information of the review and the unit for inter-review processing of the radar information makes it possible to take into account the spatial structure (accumulation and rarefaction) of HBO. This accounting allows to reduce the likelihood of false paths.

In general, these technical advantages allow us to solve the problem and achieve the claimed technical result, which consists in reducing the likelihood of false.

In FIG. 1 shows a functional diagram of a digital device for calculating the trajectory parameters of group ballistic objects (HBO), in FIG. 2 is a matrix for partitioning a plurality of marks into subsets, in FIG. 3 is a matrix explaining the principle of forming subsets of a plurality of HBO elements shown in the example of FIG. four.

The digital device for calculating the trajectory parameters of group ballistic objects contains sequentially connected unit 1 processing radar information review (RLIO) and block 2 inter-review processing radar information (RLIM). Block 1 of the RLIO at the input is connected to the output of the secondary processing device of the radar station radar station (RLS) and contains block 1.3 for calculating the geometric centers of subsets (RGCP), as well as a series-connected block 1.1 of dividing the set of marks into subsets (ROMP) and block 1.2 ranking. The first output of ranking block 1.2 is connected directly to the first input 2.1 of block 2 of the RLIM, and the second output of block 1.2 through block 1.3 of calculating the geometric centers of the subsets (RGCP) is connected to the second input 2.2 of block 2 of the inter-survey radar information processing (RLIM). Block 2 RLIM, in turn, contains a block 2.3 identification of subsets (OPM), a memory device 2.4 reference points of trajectories (ZUOTT) and block 2.5 calculation of trajectory parameters (VTP). Moreover, the signal input 2.1 of block 2 of the RLIM through block 2.3 of the PFM is connected to the first input of ZUOTT 2.4, the second input of which is connected to the second input of block 2 of the RLIM. The output of ZUOTT 2.4 through the 2.5 VTP block is connected to an indicator display device for radar information (not shown). The display device is made in the form of a display mounted on an automated workstation (AWS) of a radar operator. AWP is made on the basis of an industrial electronic computer (COMPUTER) equipped with a control panel in the form of a typesetting field and a manual mouse-type manipulator.

Block 1.1 of dividing the set of marks into subsets (ROMP) of the RLIO block is made in the form of a matrix calculator (Fig. 2) of the distribution of the set of marks found into subsets during the current review from the formula for calculating fuzzy membership relations by coordinates:

- функция принадлежности отметки х_j тому же подмножеству, что и x_i;Where

- membership function of the mark x _j to the same subset as x _i ;

x _i - designation of the selected marks of the current review in the rows of the generated matrix;

x _j - designation of the selected marks of the current survey in the columns of the generated matrix;

r _vn is the distance between the selected marks x _i and x _j ;

r _ex - the distance between the most distant marks;

Δ is the systematic error in determining the coordinates (determined by the test results).

The ranking block 1.2 is made in the form of a digital shaper of a ranked Boolean matrix (Fig. 3) according to the number of significant functions of μ (x) membership with simultaneous compression of radar information by absorbing the highest rank row of the Boolean matrix of its lower rows with a single membership function. Moreover, significant membership functions are functions whose significance level is higher than the threshold β determined by the operator AWP. Membership functions whose value is above the specified threshold are assigned the value “1”, the value of which is below the specified threshold - “0”.

Block 1.3 calculation of the geometric centers of the subsets (RSGP) is made in the form of a calculator of the geometric center according to the formulas:

where x _i , y _i , z _i are the coordinates of the detected marks of the subset in a fixed geocentric coordinate system;

x _Hz , y _Hz , z _Hz - coordinates of the geometric center of the subset;

N is the number of marks assigned to a subset.

The subset identification block 2.3 is made in the form of a calculator of the smallest distance between the standards of the subsets selected in neighboring surveys:

- эталон k-го подмножества текущего обзора;Where

- the standard of the k-th subset of the current review;

- эталон l-го подмножества предыдущего обзора;

- the standard of the l-th subset of the previous review;

K is the number of subsets highlighted in the current overview.

The storage device 2.4 of the reference points of the trajectories is configured to generate and output to the block 2.5 an array of reference points along the trajectories that are on the track.

Block 2.5 calculation of trajectory parameters (ETC) is made in the form of a calculator that implements the method of curve reconstruction using the regularization function according to the Kepler equation. In this block 2.5, the minimization method is implemented - the least squares method, the minimization function is the sum of the squared coordinate errors. The Levenberg-Marquardt algorithm, the minimization function, was chosen as the optimization algorithm for the least squares method:

- значения координат, полученные от запоминающего устройства 9.2.4,Where

- coordinate values received from the storage device 9.2.4,

- расчетное значение координат по алгоритму минимизации, t₀ - метка времени первого обзора, Т - длительность наблюдения.

is the calculated value of the coordinates according to the minimization algorithm, t ₀ is the timestamp of the first review, T is the duration of the observation.

рассчитываются по уравнению Кеплера с применением численного интегрирования по формулам:

are calculated according to the Kepler equation using numerical integration using the formulas:

Similarly:

- проекция скорости центра подмножества соответственно на оси х, у, z в момент времени t-dt, dt - шаг интегрирования по времени,

- расстояние от объекта до центра Земли,

- ускорение свободного падения для этого расстояния.Where

- the projection of the velocity of the center of the subset, respectively, on the x, y, z axis at the time t-dt, dt is the time integration step,

- the distance from the object to the center of the earth,

- acceleration of gravity for this distance.

where G≈6.67384⋅10 ^-11 H⋅m ² / kg ² is the gravitational constant, M _З ≈5.9726⋅10 ²⁴ kg is the mass of the Earth.

All elements of blocks 1-2 are made on separate reprogrammable integrated microcontrollers connected to each other and to the AWP by 4 interface communication lines and equipped with the corresponding function calculation program sewn into their memory (1-12).

A digital device for calculating the trajectory parameters of group ballistic objects works as follows.

When the system is turned on with the radar AWS, an accumulated array of detected marks for the radar survey period for calculating the trajectory parameters of group ballistic objects is received at the input of block 1.1. In block 1.1, in accordance with expressions (1, 2), a matrix of the membership function of the detected marks to one subset is formed. The resulting matrix is transferred to block 1.2 for ranking the matrix by the rank of significant membership functions for each object. Significant membership functions are functions whose significance level is higher than the threshold β determined by the workstation operator. Membership functions whose value is above the specified threshold are assigned the value “1”, the value of which is below the specified threshold “0”. The significance threshold level β by the operator is selected on the basis of the necessary degree of detail and available computing power. Next, the ranked matrix is transmitted simultaneously to block 1.3 for calculating the geometric centers of the subsets and block 2.3 for identifying the subsets. In block 1.3, in accordance with formulas (3-5), the geometric centers of the selected subsets of HBO are calculated, and in block 2.3, the identification of the subsets is performed in accordance with formula (6). The results of the calculations in block 1.3 and in block 2.3 are transferred to the storage device (memory) 2.4. In memory 2.4, the reference points of the trajectories are stored, which are accompanied by subsets of marks from HBO. Then, data from memory 2.4 is transferred to block 2.5. In block 2.5, trajectory parameters are calculated in accordance with formulas (7-12). The results of the calculations of block 2.5 are transmitted to the display device 3 AWP 4. The operator AWP 4, observing the results of the display of information radar information, makes a decision on the transfer of adequate radar information to the consumer through appropriate means of communication.

A digital device for calculating the trajectory parameters of group ballistic objects is made in the form of a bench model and software and algorithmic support for its functioning. When testing the bench model, the deviation of the scattering center of the calculated points of incidence of HBO elements under various noisy conditions and the likelihood of false paths were estimated.

The simulation results showed the possibility of reducing the standard deviation of the scattering center of the calculated points of incidence of HBO elements by at least 10-15% and reducing the probability of false paths by at least 2-4 times.

Information sources

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Claims (2)

1. A digital device for calculating the trajectory parameters of group ballistic objects, characterized in that it contains a radar information processing processing unit (RLIO) and a radar information inter-review processing unit (RLIM) connected in series to the communication interface line, the RLIO unit contains a subset geometric center calculation unit (RGPC) ), a block for splitting the set of marks into subsets (ROMP) and a ranking block, and a block for RLIM - a block for identifying subsets (OP), a storage device for reference points of trajectories (ZUOTT) and a block for calculating trajectory parameters (HTP), where the ROMP block and the ranking block are connected in series, the first output of the ranking block is connected through the OP block to the first input of the ZUOTT block, the second input of which is connected through the RGCP block to the second output of the ranking block, the output of the ZUOTT block through the VTP block is connected to the output of a digital device for calculating the trajectory parameters of group ballistic objects. 2. The digital device according to claim 1, characterized in that its blocks are made on reprogrammable integrated microcontrollers interconnected by interface communication lines.

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