RU2011120218A

RU2011120218A - METHOD FOR MAKING TRAJECTORY OBJECTIVES AND RADAR STATION FOR ITS IMPLEMENTATION

Info

Publication number: RU2011120218A
Application number: RU2011120218/28A
Authority: RU
Inventors: Валентин Иванович Кисляков; Сергей Назарович Лужных; Сергей Яковлевич Прудников
Priority date: 2011-05-19
Filing date: 2011-05-19
Publication date: 2012-11-27
Also published as: RU2470318C1

Abstract

1. Способ сопровождения траектории цели, включающий излучение в каждом направлении строба сопровождения зондирующих сигналов, прием сигналов от отражающих объектов, отбор в стробе сопровождения сигналов от сопровождаемой цели, вычисление сглаженных параметров траектории сопровождаемой цели, отличающийся тем, что отбор сигналов от сопровождаемой цели в стробе сопровождения осуществляют с использованием системы селекции движущихся целей (СДЦ) и некогерентного накопителя (НКН), при этом в направлениях строба сопровождения излучают зондирующие сигналы, состоящие не менее чем из трех импульсов, принятые от отражающих объектов импульсы обрабатывают в системе СДЦ и в НКН, амплитуду сигнала на выходе НКН Ав каждом (i-м) элементе строба сопровождения сравнивают с порогом обнаружения, установленным исходя из заданного уровня ложных тревог, в элементах строба, в которых указанная амплитуда превышает указанный порог, определяют отношение:где А- измеренная амплитуда сигнала на выходе системы СДЦ в i-м элементе строба сопровождения, превышающая уровень шума, i=1, … n, где n - количество элементов строба сопровождения, полученное отношение Ксравнивают с пороговым значением К, установленным исходя из сглаженной радиальной скорости сопровождаемой цели, ошибок ее измерения, амплитудно-скоростной характеристики применяемой системы СДЦ, при этом сигналы, для которых выполняется условиеК>Ксчитают сигналами, отраженными от сопровождаемой цели, остальные сигналы относят к случайно попавшим в строб сопровождения целям и пассивным помехам.2. Способ по п.1, отличающийся тем, что в качестве системы СДЦ применяют трехимпульсную р1. The method of tracking the target path, including radiation in each direction of the strobe tracking the probing signals, receiving signals from reflecting objects, selecting in the strobe tracking signals from the target, calculating the smoothed path parameters of the tracking target, characterized in that the selection of signals from the tracking target in the strobe escorts are carried out using a moving target selection system (SDC) and an incoherent storage device (NKN), while a probe is emitted in the directions of the tracking strobe The generating signals, consisting of at least three pulses, the pulses received from the reflecting objects, are processed in the SDS system and in the NKN, the amplitude of the signal at the output of the NKV Av for each (ith) element of the tracking strobe is compared with a detection threshold established based on a given level of false alarms, in the strobe elements in which the specified amplitude exceeds the specified threshold, determine the ratio: where A is the measured amplitude of the signal at the output of the SDS system in the i-th element of the tracking strobe, exceeding the noise level, i = 1, ... n, where n is the number elements of the tracking strobe, the obtained ratio Ks is compared with the threshold value K established on the basis of the smoothed radial speed of the target being tracked, errors in its measurement, the amplitude-speed characteristics of the applied SDC system, and signals for which the condition K> Ks are satisfied are the signals reflected from the target, the remaining signals are attributed to targets and passive interference that accidentally fall into the tracking gate. 2. The method according to claim 1, characterized in that a three-pulse p is used as the SDC system

Claims

1. The method of tracking the target path, including radiation in each direction of the strobe tracking the probing signals, receiving signals from reflecting objects, selecting in the strobe tracking signals from the target, calculating the smoothed path parameters of the tracking target, characterized in that the selection of signals from the tracking target in the strobe escorts are carried out using a moving target selection system (SDC) and an incoherent storage device (NKN), while a probe is emitted in the directions of the tracking strobe pulsating signals consisting of at least three pulses, the pulses received from the reflecting objects are processed in the SDS system and in the ICH, the amplitude of the signal at the output of the _ICH A _ННi in each (ith) tracking gate element is compared with the detection threshold established based on the specified the level of false alarms, in the strobe elements in which the specified amplitude exceeds the specified threshold, determine the ratio:

where A _SDCi is the measured amplitude of the signal at the output of the SDC system in the i-th element of the tracking strobe, exceeding the noise level, i = 1, ... n, where n is the number of elements of the tracking strobe, the obtained ratio K _{Andi is} compared with the threshold value K _P established based on the smoothed radial velocity of the target being tracked, errors in its measurement, amplitude-velocity characteristics of the applied SDC system, and signals for which the condition

K _i > K _P

consider signals reflected from the target being followed, the rest of the signals are attributed to goals and passive interference that accidentally fall into the tracking strobe.

2. The method according to claim 1, characterized in that the three-pulse time-difference time-difference system of the SDC is used as the SDC system, for which the threshold value K _{P is} calculated in accordance with the formula:

,

where Vr is the smoothed radial velocity of the target being tracked;

σ _V is the standard error of the determination of the smoothed radial velocity of the target;

V _C is the value of the first non-zero “blind” speed of the SDS system;

k _nk is the NKN accumulation coefficient calculated as the ratio of the amplitude of the signal at its output to the amplitude of one received pulse.

3. A radar station (radar) comprising an antenna, an antenna switch, a receiver, a signal selection unit from the target in the tracking strobe, a unit for checking the criteria for resetting the trajectory from the tracking unit, a block for smoothing the path parameters, an extrapolation unit for the target path parameters, a unit for computing the tracking strobe boundaries, a transmitter, a synchronizer, while the signal input-output of the antenna is connected to the input-output of the antenna switch, the output of which is connected to the input of the receiver, the signal selection unit from the target in the strobe the line is connected to the block for smoothing the parameters of the target path, the block for extrapolating the parameters of the target path and the block for calculating the gate boundaries, the output of the transmitter is connected to the input of the antenna switch, the second output of the signal selection block from the target in the tracking strobe is connected to the input of the block for checking the criteria for resetting the track from tracking, the output of which is connected to the second input of the unit for smoothing the parameters of the target path, the output of the unit for smoothing the parameters of the target path is the radar output, output b The eye for calculating the boundaries of the tracking gate is connected to the information input of the antenna and the second input of the block for selecting signals from the target in the tracking strobe, the first, second, third, and fourth outputs of the synchronizer are connected to the clock inputs of the receiver, the block for selecting signals from the target in the tracking strobe, block for calculating the borders of the strobe and transmitter, respectively, a signal selection unit from a target in the tracking strobe, including a comparison unit with a detection threshold and a unit for checking a signal selection condition from a target, characterized in that in the selection of signals from the target in the tracking strobe introduced a system of selection of moving targets (SDC), an incoherent storage device (NKN), a second unit for comparison with the detection threshold, a memory device for the coordinates of the elements of the tracking strobe, a memory device for smoothed radial velocity of the target, while the system inputs are interconnected SDC and NKN form the first input of the signal selection block from the target in the tracking strobe, the inputs of the memory of the coordinates of the elements of the tracking strobe and the smoothing memory of the radial velocity of the target are respectively the second and third inputs of this block, the output of the SDS system is connected to the input of the comparison block with a detection threshold, the output of the ICH is connected to the input of the second comparison block with a detection threshold, the outputs of the comparison block with the detection threshold, the SDS system, the second comparison block with a detection threshold, a storage device for the coordinates of the elements of the tracking strobe, a storage device for a smoothed radial velocity, the targets are connected to the first, second, third, fourth, respectively m and the fifth inputs of the block for checking the conditions for selecting signals from the target, the first and second outputs of the block for checking the conditions for selecting signals from the target are respectively the first and second outputs of the block for selecting signals from the target in the tracking strobe, and the output of the block for smoothing the parameters of the target path is connected to the third input of the block selection of signals from the target in the tracking strobe.