SU1341511A2 - Device for exciting impact momenta - Google Patents

Abstract

The invention relates to test equipment devices. In order to expand the range of the frequency of the shock impulses by increasing the efficiency of damping their aftereffect into the device containing the power source 1, battery 2 capacitors, electromechanical force-generator 3, measuring vibration transducer 4, phase-sensitive element 5, phase inverter 6, elements 7, 8 OR, trigger 9, inverters 10, 11 NOT, charge switches 12 and 13, different. Row keys 14 and 15, elements 16, 17 AND, multivibrator 18, adder 19, shaper 22 square pulses, inverter 24, pulse generators 25, 26, delay line 27, inverter 28, a damping circuit -. The differentiator unit 21, amplifier 23, the output of which is connected to the first input of the adder 20. The circuit allows you to generate a signal that compensates for the impact of shock pulses, which in turn makes it possible to use a higher frequency power supply of the electro-mechanical energizer. 2 Il. C ® (L 14) IC.G

Description

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The invention relates to devices for testing equipment and can be used for testing products for shock loads using electromechanical force actuators, is an improvement of the device according to the author. St. No. 1155890.

The purpose of the invention is to expand the range of the frequency of the following pulses due to an increase in the quenching efficiency.

FIG. 1 shows a block diagram of the device; in fig. 2 - diagrams explaining his work. .

The device contains a source of 1 pi-ti, a battery of 2 capacitors, an electromechanical energizer 3, a measuring vibration transducer 4, phase-sensitive element 5, a phase-inverter 6, elements 7 and 8 OR, trigger 9, elements 10 and 11 NOT, charging switches 12 and 13, bit switches 14 and 15, elements 16 and 17 And, multivibrator 18, adders 19 and 20, differentiating unit 21, shaper 22 rectangular pulses, amplifier 23, inverter 24, generators 25 and 26 pulses, delay line 27, inverter 28.

The power source 1 through the first and second charging switches 12 and 13, respectively, are connected to the inputs of the battery 2 of the capacitors, the output of which is through the first bit switch. 14 and the first element 7 OR is connected to the input of the Electromechanical Energizer 3 with the vibrator 4 mounted on its moving system, the output of the latter through the phase-sensitive element 5 connected in series, the phase inverter 6, the first adder 19 and the second charge key 15 are connected to the second input of the first element 7 OR, and the second input of the first adder 19 is connected to the output of the vibration transducer 4 through a serially connected differentiating unit 21, an amplifier 23, a second adder 20, the second input of which is connected to the output house vibration transducers 4, rectangular generator 22 and inverter 24 pulses.

The device works as follows.

When turned on from the generator 26. the multivibrator 18 opens element 16 AND or element 17 AND depending on the polarity of the excited

five

five

0 5 o

five

five

0

five

P shock pulse. Battery 2 is charged with a capacitor through switch 12 (positive polarity) or 13 (negative polarity). At the output of line 27, a signal appears with a certain delay S associated with the charge time T of the battery of capacitors 2 (i i Tj). The impulse from the generator 25 includes a trigger 9, the signal from which through the element 8 OR closes the discharge key 14. A current pulse is applied to the winding of the moving part of the electromechanical energizer 3, due to the discharge of the battery 2 capacitors. In this case, at the output, the first element 10 is NOT signal. Therefore, the keys 12 (or 13) and 15 are open, and the closed state of the key 14, even if there is no signal from the output of the trigger 9, is due to the absence of a signal at the output of element 10 NOT and its presence at the outputs of elements 11 NOT and 8 OR. When the voltage of the capacitor 2 battery reaches the threshold of the element 10, a signal does not appear at its output, which causes the switches 12 (or 13) and 15 to close. The battery of the capacitors 2 from the power supply 1 through the closed switch 12 (or 13), the bit circuit is open due to the open state of the key 15.

Closing key 15 leads to the formation of closed parallel quenching circuits: the winding of the moving system of the electromechanical force-exciter 3 — the vibrator 4 and the first damping circuit1 phase-sensitive element 5, the phase inverter 6, parallel to the second damping circuit: the amplifier and the driver and the amplifier; 20, to the second input of which the output signal of the vibrating converter 4, the shaper 22 of the rectangular signals and the inverter 24 (the signal of these circuits are summed on the first adder 19) is provided - a key 15, ent IISH 7, input mobile system energizer coil 3.

A closed loop formed by blocks 3-6, 19, 15 and 7, operates in the mode of self-oscillations with damping. The winding of the moving system of the exciter 3 is closed to the source of EMF; with internal resistance R (R is the output resistance of the channel, la, forming) j due to, 13415

signal from the inverter 4. Due to the operation of this circuit, there is some damping of the signal's after-effects (Fig. 2.6) as compared to the original (Fig. 2a).

The second damping circuit, consisting of differentiating unit 21, amplifier 23, second adder 20, to the second input of which a signal is output from the output of the vibrator 4, shaper 22 of square-wave pulses and inverter 24 supplies a signal of opposite polarity to the energizer (FIG. 26), the beginning of which is 15 ahead of the zero movement value by time T, (at X + KX O, fig 2 g), corresponding to a delay in the processing of this signal by mechanical and electrical feedback elements. This signal returns the moving system to its original position, thereby accelerating the process of quenching (FIG. 2 d), t, e, increasing its efficiency. .25

A second damping circuit stops operation when the output voltage

20

5 5

0

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the second adder 20 becomes lower than the trigger level of the square driver 22.

The transition pulse shock excitation occurs again only when the key 14 from the trigger 9 is closed through the element 8 of the IPD.

Claims (1)

Invention Formula A device for the excitation of shock pulses according to the author, St. No. 1155890, characterized in that, in order to expand the frequency range following shock impulses, a differentiating unit, an amplifier and a second adder are inserted into it, the output of the measuring vibration converter through a serially connected differentiating unit and the amplifier is connected to the first input of the second adder, whose stroke is connected to the input a square pulse former; the output of the measuring vibration transducer is connected to the second input of the second adder. Xl and x2 3 Compiled by A. Podol n Editor L, Povhan Tehred A. Kravchuk Proofreader A. Tsko Order 4428/46 Circulation 776 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