SU949637A2 - Device for measuring parameters of control system inertia stages - Google Patents

Description

The invention relates to the field of automatic regulation.

By main auto No. 622058 known device containing per. an integrator with an adder, the first input of which is connected to the first input of the device, a measuring unit, two scaling units, a second integrator with an adder and two voltage dividing units, the first inputs of which are connected to the output of the first and the input of the second scaling units and the second input of the first adder , the output of the first integrator is connected to the first input of the second adder, to the second input of which the output of the second scaling unit and the second input of the first voltage dividing unit are connected, the output of the second integrator and connected to a second input of the second voltage divider outputs a voltage dividing blocks connected to respective inputs of the measuring unit and the first input of scaling unit coupled to the second input device [1J.

1.5

The purpose of the invention is the expansion of the functionality of the device.

This goal is achieved by the fact that a third scaling unit is added to the device, connect? -. the input to the output of the second adder, and the output to the first input of the third adder, the second input of which is connected to the output of the first adder, and the outputs of the second and third adders are connected to the corresponding inputs of the measuring unit.

The drawing shows a functional diagram of the proposed device.

The device contains an inertial link 1, the first adder 2, the first and second scaling units 3 and 4, the first integrator 5, the second adder 6, the first and second voltage dividing units 7 and 8, the third scaling unit 9, the third adder 10, the second integrator 11 and measuring unit 12.

The device operates as follows.

The signal taken from the input of the inertial link 1 is fed to the first input of the first adder 2 (input a), 30 and to the second input (B) with the opposite

A disadvantage of the known device is that it does not allow to determine the first and second derivative of the output signal of the object.

sign, the signal e of the first block 3 scaling connected to the output of the investigated inertial event. The output of the first adder 2 is connected to the first input (Q) of the third adder 10 and through the first 5 integrator 5 to the first input (g) of the second adder 6. The output of the first mash-block 3 through the second scaling unit 4 is connected to the second input (b) of the integrator 6 s 10 opposite sign. The signal taken from the output of the scaling unit 3 is supplied to one of the two inputs of each of the division blocks 7 and 8 (divider). To the second input of block .7 of division 15, a signal is output from the output of block 4 of mae, stacking, and to the second input of block '' 8 of division through integrator 11, the signal from the output of adder 6. Moreover, i through the output of block 7 of division ^ corresponds to coefficient at the first derivative of the differential equation of the link under study, the signal at the output of block 8 of dividing the value of the coefficient at the second pro-25 and the signal at the output of adder 6 is the first derivative of the output signal of the inertial link 1. The signal from the output of adder 6 through the third scale iruyuschy amplifier 9 is supplied to the second input of the third adder 10 with the opposite sign (subtrahend). The signal at the output of the adder 10 corresponds to the value of the second derivative of the output signal of the investigated link

1. This signal, as well as the output signals of blocks 7 and 8 of the division and the adder 6 are recorded by the measuring unit 12.

The measurement process consists of two operations.

1. Setting transmission coefficients of integrators 5 and 11 amplification elements of the stacking units.

2. Direct link parameters.

The coefficients are set as follows. In the steady state, changing the transfer coefficient of the adder 2 at the input a, achieve the maximum? voltage at the output of the integrator 5 (in the mode of setting the coefficients, the integrators * 5 and 11 operate in large-scale and the coefficients are 3, 4 and 9, and mass measurement). Then, by changing the gain of the scaling unit 3, the signal level at the output of the integrator 5 is set to zero. After which, putting the integrator 5 in the integration mode and the circuit is returned to its original state, it is necessary to apply an jump-like signal to the output of the studied link 1 in the steady state, changing the transfer coefficient the adder 6 at the input δ set the maximum voltage at the output of the integrator 1. Then, by changing the gain of the scaling unit 4, achieve a zero signal level at the output of the integrator 11. The gain of the third scaling unit 9 is set equal to the ratio of the signals at the outputs of the dividers 7 (divisible) and 8 (divider). In this case, the transmission coefficients at the inputs of the adder 10 are set equal to unity.

After these operations, the proposed device is calibrated and, putting the integrator 11 in the integration mode, you can begin to determine the parameters of the investigated link. For this, it is necessary, by applying a signal to the input of link 1, using the measuring unit 12 to determine the coefficients of the equations and the first and second derivatives of the output value of the investigated link.

Claims (1)

This invention relates to the field of automatic control. According to the basics 4th auth. W 622058 a device is known that contains a first integrator with an adder, the first input of which is connected to the first input of the device, a measuring unit, two scaling units, a second integrator with an adder and two voltage dividing units, the first inputs of which are connected to the output of the first and the second input scaling and the second input of the first adder, the output of the first integrator is connected to the first input of the second adder, to the second input of which the output of the second scaling unit is connected and the second input of the first block is divided and voltage, the output of the second integrator is connected to the second input of the second voltage dividing unit, the outputs of the voltage dividing units are connected to the corresponding inputs of the measuring unit, and the input of the first scaling unit is connected to the second input of the device And the disadvantage of the known device is that it does not allow to determine the first and second derivatives from the output signal of the object. The purpose of the invention is to expand the functionality of the device. This goal is achieved by the fact that the device additionally introduced the third scaling unit, podkl: -. A second adder connects its input to the output of the second adder, and the output to the first input of the third adder, the second input of which is connected to the output of the first adder, and the outputs of the second and third adders are connected to the corresponding inputs of the meter. The drawing shows a functional diagram of the proposed device. The device contains an inertial link 1, the first adder 2, the first and second blocks 3 and 4 of scaling, the first integrator 5, the second adder b, the first and second blocks 7 and 8 of the division, the third block 9 of scaling, the third adder 10, the second integrator 11 and measuring unit 12. The device operates in the following manner. The signal taken from the input of the inertial link 1 is fed to the first input of the first adder 2 (input a), and to the second input (B) with the opposite sign, a signal is sent from the first scaling unit 3 connected to the output of the inertial even under test. The output of the first adder 2 is connected to the first input (9) of the third adder 10 and through the first integrator 5 to the first input (d) of the second adder b. The output of the first scaling unit 3 through the second scaling unit 4 is connected to the second input (b) of the integrator 6 with the opposite sign. The signal removed from the output of the scaling unit 3 is fed to one of the two inputs of each of the blocks 7 and 8 of the division (divider). The second input of the .7 division unit is given a signal from the output of the 4 May stacking unit, and the second input of the 8 division unit through the integrator 11 is a signal from the output of the adder 6. At the same time, the output signal of the 7 division unit corresponds to the value of the first derivative of the differential equations of the studied link, the signal at the output of block 8 to the value of the coefficient at the second derivative, and the signal at the output of adder 6 is the first derivative of the output signal of the inertial link 1. The signal from the output of the adder b through thirds is the scaling gain Itel 9 is fed to the second input of the third adder 10 with the opposite sign (subtracted). In this case, the signal at the output of the adder 10 corresponds to the magnitude of the second derivative of the output signal of the link under study 1. This signal, as well as the output signals of blocks 7 and 8 of the division and adder b, are recorded by the measuring unit 12. The measurement process consists of two operations. 1. Set the transfer factors of integrators 5 and 11 and the gain factors of blocks 3, 4 and 9 of scaling. 2, Direct measurement of link parameters. The coefficients are set as follows. In the steady-state mode, by changing the transfer coefficient of the adder 2 at the input a, the maximum voltage is reached at the output of the integrator 5 (in the coefficient setting mode, the integrators 5 and 11 operate in the scale mode). Then, changing the gain factor of the scaling unit 3, setting the zero level of the signal at the output of the integrator 5. After that, converting the integrator 5 to the integration mode and returning the circuit to the initial state, it is necessary to feed a jump signal to the output of the link 1 under test and change the coefficient transmitting adder b at input b sets the maximum voltage at the output of integrator 1. Then, changing the gain of scaling unit 4, achieve a zero signal level at the output of the int gratora 11. The gain of the third unit 9 is set to a scaling ratio of the signals at the outputs of dividers 7 (dividend) and 8 (the divisor). In this case, the transfer coefficients for the inputs of the adder 10 is set equal to one. After these operations, the proposed device is calibrated and, by converting the integrator 11 into the integration mode, one can proceed to the determination of the parameters of the studied link. To do this, it is necessary, applying the signal 1 to the input of the link, to produce the determination of the coefficients of the equations and the first and second derivatives of the output value of the studied link using measuring unit 12. The invention The device for measuring the parameters of the inertial units of the control systems according to the author. 622058, characterized in that, in order to expand the functionality, a third scaling unit is inserted in it, connected by its input to the output of the second adder, and output to the first input of the third adder, the second input of which is connected to the output of the first adder, and the outputs of the second and The third adders are connected to the corresponding inputs of the measuring unit. Sources of information taken into account during the examination 1. USSR author's certificate 622058, cl. G 05 B 23/02, 1978 (prototype).