SU363069A1 - W / BTOr - Google Patents

Description

one

The invention can be used in automatic control systems for correction with simultaneous conversion of a DC signal to an alternating current (modulated carrier frequency) signal.

Known corrective devices, which have an amplitude-frequency characteristic that decreases with increasing frequency of the input signal in the absence of delays or phase advance, and contain inertial units, detectors, modulators and limiting amplifiers, are characterized by low sensitivity and low dynamic range of the input signal, so how the detection turns out to be linear only with significant a: 1) amplitudes of the input signals.

The proposed device differs from the known ones in that it comprises a second amplifier-limiter and a third modulator, the input of which is connected to the output of the inertial link, the output is connected to the output of the device, and the input voltage through the second amplifier-limiter is connected to the output of the first modulator whose input is connected to the inertia link course.

This increases the sensitivity of the device and expands the dynamic range of the input signals.

 FIG. 1 shows a block diagram of the proposed correction device; on

FIG. 2 - time diagrams that show his work.

The device contains an inertial element, a forcing element 2, the first 3, the second 4, the third 5 modulators, the first 6 and the second 7 limiter amplifiers.

The input of the correction device through the inertial element / connected to the input of the third modulator 5, forming the output

the signal of the device and the input of the modulator 3, whose output through the limiting amplifier 7 is connected to the input voltage of the modulator 5. The input of the device through the boost link 2, the modulator 4 and the limiting amplifier 6 is connected to the input voltage of the module torus 3. The input voltage reference voltage of the modulator is connected to the terminals of the network; current The device works as follows.

The input signal U- is supplied to the inertial link / and the forcing link 2, at the output of which the signal U is formed, having an amplitude-frequency characteristic and a phase delay leading to an increase in the frequency of the input signal . The t / g signal is converted by modulator 4 into an alternating current signal t / 5 with an oscillation frequency determined by the mains frequency (signal U) and a phase determined by the polarity of the signal Ls. T / g signal

through the amplifier-limiter 6 as a reference signal f / e is fed to the modulator. The latter transforms the signal Uz into an alternating current signal UT, the voltage phase of which is determined by the polarity of the signals lJ- and ultrasonic. The signal Uj is fed through a limiting amplifier as a reference signal t / g to modulator 5, which fortifies the output signal of a correction device t / g, which is proportional to the amplitude of the signal at the output of the inertial link, and the phase corresponding to the polarity of the signal at the output of the forming link.

and 3 is a device, the input of which is connected with

the input of the device, and the first modulator, the input of the reference voltage of which is connected to the input of the device through serially connected first amplifier-limiter,

the second modulator and the forcing element, wherein the reference voltage input of the second modulator is connected to a power source, characterized in that, in order to increase the sensitivity of the device and expand the dynamic range of the input signals, it comprises a second amplifier-limiter and a third modulator , the input of which is connected to the output of the inertial link, the output is connected to the output of the device, and the input of the reference voltage

through the second limiting amplifier connected to the output of the first modulator, the input of which is connected to the output of the inertial link.

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