SU1226496A1 - Device for simulating pulse interference - Google Patents

Abstract

The invention relates to analog computing simulators and is primarily intended to investigate the influence of impulse noise in the power supply circuits on the performance of the equipment under test. The purpose of the invention is to increase the frequency range and improve the accuracy of modeling interference. This is achieved by introducing into the device of a shaper a pulse width, a shaper of the front and a slice of the pulses, a group of limiting amplifiers and a load made in the form of a variable divider with corresponding functional connections between them and known blocks of the device. 1 il. i (Л С tN 1чЭ с: 4 (Art.

Description

The invention relates to analog computing simulators, primarily intended to investigate the effect of impulse noise in the power supply circuits on the performance of the equipment under study.

The purpose of the invention is to expand the frequency range and improve the accuracy of modeling interference.

The drawing shows a block diagram of the proposed device "

The device contains a power supply source 1, a filter 2, test equipment 3, a unit 4 for setting operating modes, a control pulse generator 5, a pulse width driver 6, a switch 7, a pulse distributor 8, a pulse front and cut driver 9, a group of driver amplifiers 10, active regulated load 1.

The device works as follows.

To generate simulated impulses in the form of a drawdown of rectangular or trapezoidal shape from the outputs of the generator 5, two pulses shifted in time arrive at the inputs of the generator 6 of the impulse duration (rectangular interference Mbi), and this time can be smoothly adjusted. The first pulse controls switching on and the second one by switching off the imaging unit 6 as a result of which a pulse is formed at its output (square-shaped noise) 5 whose duration is equal to the time shift between the first and second pulses coming from the generator outputs 5. When the next pair of pulses arrives Ppulse output by shaper 6 is repeated. Shaper 6, representing, for example, an optoelectronic relay of direct current, is used for galvanic isolation of generator 5 from other units of the device.

The generated pulses from the output of the imaging unit 6 are fed to the information input of the key 7, the control input of which receives the enabling pulses from the output of the D-block of the mode, the duration and frequency of which can be continuously adjusted. At the output of the switch 7, a packet of pulses (rectangular shape) is obtained, the number of pulses in the packet and the repetition rate of the packs are determined by the duration and repetition frequency of the resolution pulses from the output of block 4, respectively.

The formed packet of pulses (square-shaped noise) is fed to the input of the distributor 8 pulses. Depending on what kind of pulses (rectangular or trapezoidal) are required to be modeled, the device can operate in one of two modes: the mode of issuing impulses of rectangular-shaped interference or the increment mode of trapezoidal impulses.

When the device is operating in the rectangular pulse generation mode, the modulated interference signal from the second output of the pulse distribution unit 8 is fed to the inputs of the driver-shaper amplifiers whose outputs

Combine Eene and work for a total active regulated load 11. Block 9 of the formation of the front and slice of impulses is disconnected. All the amplifier-shapers 10 are made identical. Each provides the same maximum current.

By varying the load value 11 and the number of the included amplifiers 10, it is possible to regulate the amount of current over a wide range, and directly connecting the load to the common minus bus of the filter and the equipment under test expands the frequency range of the simulated noise.

When the device is in mode

issuing trapezoidal pulses, the signal from the first output of the distributor 8 pulses is fed to the input of the front and cut pulse shaper 9, which makes it possible to adjust the pulse and cut pulse durations both separately and jointly. The formed trapezoidal pulse packet arrives on

the inputs of all amplifier shapers, and then the work is similar to the first.

Claims (1)

Invention Formula A device for simulating impulse noise, containing a source of supply voltage, the outputs of which are connected via outputs to the outputs device, the job setting unit, currently in the form of a pulse generator, the output of which is connected to the control input of the key, the output of which connected to the control input of the pulse distributor, control pulse generator, which is so that, in order to improve the accuracy of modeling and expanding the frequency range, it additionally contains a pulse width driver, a driver the front and cutoff of pulses, a group of amplifiers-formers and a load made in the form of a variable resistor, the first koToporo view is connected to the outputs of amplifiers-formers of a group. The second output and the moving contact are combined and connected to minus 6496 The second bus of the filter and group shaping amplifiers, the positive power bus of which is connected to the positive bus of the filter, the outputs of the control pulse generator 5 are connected respectively to the inputs of the pulse width generator, the output of which is connected to the information input of the switch, the first output of the pulse distributor 10 is connected to the start input the front and pulse cutters, the output of which and the information inputs of the amplifiers forming the group are combined and connected to the second you (impulse distributor 5 turn) owls. Compiled by V.Fukalov Editor O. Bugir Tekhred L.Oleinik Proofreader 0.Lugova Order 2136/50 Circulation 671 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4