SU660029A1 - Ratio control device - Google Patents

Description

C) mmators, the outputs of the sensors of the first and second parameters are connected to the inputs of the second ratio controller and the inputs of the first adder connected to one input of the controller of the sum of parameters, the second input of which is connected to the setpoint device, and the output to the first inputs of the second and third adders , the second inputs of which are connected to the outputs of the Ratio regulators, and the outputs of the second and third adders are connected to the inputs of the actuators. The device contains an adder 1, a setting device 2, a regulator of the sum of parameters 3, an adder 4, an actuator 5 with regulator, body 6, an object 7, a parameter sensor 8, a regulator of ratio 9, an adder 10, an actuator 11 with a regulating organ. 12, obgkt 13, the sensor of parameter 14, the ratio controller 15. Consider the operation of the proposed device. Here, the adder I sums the signals from the sensors 8 and 14 of the controlled parameters and provides the total signal to the controller input of the sum of the parameters 3, where the signal is compared with the reference from the setpoint 2 to the total value of the controlled parameters. The output of controller 3 is fed to the inputs of adders 4 and 10 in the parameter control circuits. The inputs of the adders are fed to the signals from the ratio controllers 15 and 9, which are installed in the control parameters. Output signals of the adders via actuators 5, 1Г;: regulators 6, 12 affect objects 7, 13, respectively. The output parameters of the objects are recorded by sensors 8 and 14, the signals from which are fed both to the inputs of the adder 1 and to the inputs of the regulators of the correlation side 15 and 9. Moreover, the signal from the sensor 8 is fed to the controller 15 as variable and to the input of the controller 9, and the signal from the sensor is 14-to-regulator 15 as a variable and pa the setpoint input of the controller 15. The operation of the circuit proceeds as follows. In the unarranged state, r / 1 s (, 1 u.2-a.h and at i /, - jj / 2 J / L3. If any of the parameters deviate (y or ijz) from the nominal, mismatch signals appear at the inputs of all three For example, the signal from sensor 8 became rapep i / i + Ayi. At the inputs of the ratio controls 9 and 15, mismatches occur because i / i-4-Az / iai r / 2 "2; and at the input of the regulator 3 , since У | + Dg / 1-b1 / 2 th r /. W. Let Dg / 1 be a positive quantity. Then the controller 15 will begin to reduce the output signal Zi, since the difference of the task and the variable a, 7, - a, KI - a , D Y,: .-. - (, LC (Similarly, regulator 9 will start at amplify the output signal Z, AS a, G, + a, DG, -a,.} -,., LG, 0. Effects of Z and Z are caused by the deviation of the ratio of the output signals of the sensors from the specified l / i / l / 2 a2 / a At the same time, the regulator 3 will begin to reduce the output signal V, since, -, y, DG, -G, -DU, 0. The influence of Y is caused by the deviation of the sum of variables from the specified value. Thus, the control actions t / i and f / 2 for both parameters are formed depending on both the deviation of the ratio of the controlled parameters from the given one, and 1 from the deviation of the sum of these parameters from the specified value. In the above case, the intensity of the control action U, which reduces the spontaneously increasing value of the parameter g /, increases due to the simultaneous reduction of its components / i and U. At the same time, the intensity of the control action U decreases because the change in V has the sign , inverse of the change in zz. The effectiveness of the organization of control actions Hi and Uz and consistency are achieved by choosing the settings of the regulators 3, 9, 15. In the general case, the described scheme has the advantages that, first, it is symmetrical and equally effectively suppresses perturbations through any channel parameter and. secondly, it equally effectively suppresses deviations of both the ratio and the parameter values from the specified ones. Ph o rumula and 3 a b a r s i n A device for controlling the ratio, containing sensors iervo1-o and the second parameters, connected to the inputs of the first regulator of the ratio, the setting device and the first and second actuators connected to the corresponding Zuyup1, they regulate them, by their bodies, about the fact that, in order to improve the dynamic characteristics of the device, it contains a second ratio controller, a parameter sum controller and adders, and the outputs of the first and second sensors parameters are connected to the inputs of the second The controller of the matching and the inputs of the first summator connected to one input of the regulator of the sum of parameters, the second input of which is connected to the setpoint generator, and the output of the first inputs of the second and third adders, the second inputs of which are connected to the outputs of the ratio regulators, and the outlets of the second and third sumo are connected to the inputs of the external mechanisms.

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Sources of information, Melyushev. Fundamentals of automation and automata into consideration in the examination of chemical plants. M., “Masha. A.V. Kazakov, M.V. Kulakov, Yu.K. nestration, 1970. p. 321.

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