SU203008A1 - RDDYOSHCHNONNY SIMULATOR - Google Patents

Description

At present, simulators of the effect of the antenna pattern in a radar simulator are known, in which the simulation is performed only in the horizontal plane.

The proposed simulator of the influence of the directivity pattern in the radar simulator makes it possible to simulate the radar pattern at positive and negative angles of inclination with respect to the horizon and differs from those known in that the input of the sawtooth generator that simulates a zero angle of antenna position with respect to the horizon is connected via the limiter of the pulse duration to the flight altitude sensor and to the transmitter of the angle of inclination of the antenna relative to the horizon, and the inputs of two other generators P1Sh00 (3 times a voltage simulating a positive slope and otrinatelny antenna otno (sheniyu to the horizon, connected to the output of the calculator directly with the outputs of the aforementioned generators are connected to the adder.

The drawing shows the block diagram of the device.

The radar picture is influenced by the angle of inclination of the antenna with respect to the horizon and the height of the flight of the aircraft, which are determined by means of a controlled generator 1 sawtooth current. The discharge of capacitance in this generator is carried out through a current generator, to the input of which the ratio

where A is the antenna tilt angle with respect to the horizon, H is the altitude of the aircraft. The division of 4 by H is carried out in node 2. The sawtooth voltage from the generator 1 is fed to the limiting amplifier 3, where it is converted into a rectangular pulse, the duration of which determines the maximum visible distance.

The sawtooth generator generates a pulse that determines the pulse shape of the temporal adjustment of the gain of the reflectivity signal at angles close to zero,

As indicated above, as the negative angle increases, the distance to the point of illumination of the beam with the maximum intensity decreases, and the signal amplitude increases. To imitate the dependence of the increase in the intensity of the reflected signal on the growth of the negative angle I: a sawtooth voltage generator 5 is designed. A voltage proportional to the negative angle / 3 is supplied to this generator. The generator forms a sawtooth pulse, the slope of which is proportional to the angle of inclination of the antenna with respect to the horizon. The pulse removed from this generator enters the amplifier adder b, where it is summed with the pulse from generator 4. A pulse is removed from the amplifier of the adder, the slope of which varies depending on the antenna tilt angle. As this angle increases, the slope of the tip of the temporal gain control pulse changes from falling to increasing. The duration of this pulse is determined by the pulse duration of the maximum radar vision, which from limiter 3 is fed to the generators 4.5 and

The formation of a pulse of variable gain control at positive antenna tilt angles with respect to the horizon is carried out using a sawtooth voltage generator 7. This generator, which receives voltage from a shock-sensitive rectifier with positive angles of tilt, forks a pulse with an exponential increase in pressure. The rate of increase in voltage is proportional to the value of april coming from a phase-sensitive rectifier. The exponential growth of

Neither the pulse of this generator is necessary to reduce the echo signal more quickly at small distances. From the output of the generator 7, the pulse enters the amplifier cooler b, where the voltage of this pulse is subtracted from the voltage of the pulse generator 4. The amplitude of the pulse of the time-controlled gain control depending on the flight altitude is also changed. voltage depending on the height of the simulated flight.

From the output of the amplifier of the adder, the pulses of the temporal gain control go to the modulator where the signal level of the reflectivity changes temporarily.

BACKGROUND OF THE INVENTION

A radar simulator, c6i holding a pulse generator with a maximum irradiation range, a flight height sensor, three sawtooth voltage generators, which generate pulses of a temporary gain control of simulated signals, at zero, positive and negative antenna tilt angles with respect to the horizon, and an adder that differs in , in order to imitate the radar picture, taking into account the diagrams above; idleness, the input of the sawtooth generator, imitating the antenna zero angle with respect to the horizon, is connected via a pulse width limiter to the flight height sensor and to the antenna tilt angle calculator with respect to the horizon, and the inputs of the other two: a sawtooth generator, imitating: the positive and negative tilt of the antenna with respect to the horizon are connected to the output of the same calculator directly, and the outputs of the above generators are connected to the adder.