SU822147A2 - Centralized control system - Google Patents

Description

The invention relates to automatic control, in particular, to systems of automatic centralized control of a group of objects in which the choice of an object switched with a control device is carried out according to the probabilistic principle, and for example, the control of heating units of a rolling mill and pipe rolling mill can be used. production. According to the main author. St. Ms 55538 O. The known system contains key elements, functional converters, memory elements, first blocking blocks from the second group of blocking blocks by the number of control objects, clock generator, zero-organ, threshold element, threshold voltage driver, switchgear and a switchboard, united in the distribution unit, the respective inputs and outputs of which are connected to the respective outputs and inputs of the control objects, respectively. The output of each first blocking unit from the first group of blocking units is connected to the corresponding input of the threshold element, to the corresponding input of the notJOg voltage generator, and to the first inlet of the corresponding first blocking unit from the second group of blocking units whose output is connected to an appropriate distribution unit. The outputs of the threshold element are connected to the inputs of the zero-organ and to the first outputs of the blocking blocks from the second group of blocking blocks, for which the third inputs are connected to the output of the nullorgan and the fourth to one of the outputs of the clock generator. The second and third inputs of the clock pulse generator are connected to the second inputs of the first blocking blocks and to the first inputs of the key elements, respectively, the second inputs of which are connected to the outputs of the corresponding control objects, and the output of each key element through a connected and functional memory element and the storage element to the third input of each first blocking block from the first group of blocking blocks. The output of the threshold voltage generator of the system is keys to one of the inputs, the threshold element iT. However, in this centralized control system, only a probabilistic choice of an object switched with a control device (command block) is provided, since with such a choice an object may be left without control, about which state information about all objects The management becomes aware that he is in the worst condition. This makes the system of centralized management of a group of objects unreliable and reduces its efficiency. The purpose of the invention is to increase the reliability of the centralized control system with the probabilistic principle of selecting an Object. The goal is achieved by the fact that the second and third threshold elements, a sawtooth generator, a delay element and the second functional converters, the second storage elements, the second blocking blocks in the first block of blocking units, the second blocking blocks are introduced into the centralized control system. the blocks in the second group of blocking blocks and the second key elements, the outputs of each of which are connected through the corresponding second functional series in series The former and the second storage element are connected to the fourth input of the corresponding second block 11. The first block of the first group of blocking blocks and the corresponding input of the second threshold element, the output of which is connected to the first inputs of the second key elements, to one of the inputs third of its threshold element and to the first input generator sawtooth voltage, the output and second input of which is connected to one of the inputs of the second threshold element and the output of the delay element, respectively, whose input is connected En to one of the outputs of the clock pulse generator, the other output of which is connected to the second inputs of the second blocking blocks of the first group of blocking blocks and to the second inputs of the second blocking blocks of the second group of blocking blocks, output, the fourth, third and first inputs of each of which are connected to the corresponding input switchgear, to the output of the corresponding second blocking block of the first group of blocking blocks, to the first input of the corresponding first blocking block of the first group of block respectively, the corresponding inputs of which are connected to the first inputs of the second blocking blocks of the first group of blocking blocks, the third inputs of which are connected to one output of the third threshold element, the other outputs and corresponding inputs of which are connected to the inputs of the switch and the output of the second key elements, respectively, the second input of each of which is connected to the output of the corresponding storage element. In the drawing, a block diagram of a centralized control system is shown. The centralized control system contains key elements 1, second functional converters 2, functional converters 3, second storage elements 4, storage elements 5, second blocking blocks 6 of the first group of blocking blocks, first blocking blocks 7 of the first group of blocking blocks, threshold voltage generator 8, second threshold element 9, second key elements 10, third threshold element 11, sawtooth voltage generator 12, delay element 13, clock pulse generator 14, threshold the first element 15, the zero-body 16., the second blocking blocks 17 of the second Block of blocking units, the first blocking blocks 18 of the second group, switchgear 19, switch 2O, block 21 of commands, control objects 22. The first, second and third outputs of the generator 14 clock pulses are connected respectively to one of the inputs of the second threshold element 9 through the consequently connected, 13 delays and sawtooth voltage generator 12 to the second inputs of the first 7 and second 6 blocking blocks from the first group and the second group of blocking blocks 18 and 17 and to the inputs of the key elements 1, the other input of each of which is connected to the output of the corresponding control object 22, and the output through the positive side. The coupled functional converter 3 and the storage element 5 are connected to the fourth input of the corresponding first block 7 of the first group of blocking blocks and to the input of the corresponding second key element 1 and 10, and through the connected in series the second functional converter 2 and the storage element 4 are connected to the fourth input of the corresponding the second blocking block 6 of the first group of blocking blocks and the corresponding input of the second threshold element 9, the outputs of which combined and connected to the first input of the generator 12 of the sawtooth voltage, to the other inputs of the second key elements 10 and to one of the inputs of the third threshold element 11 ,. one outputs of which are connected to the switch 2O inputs, and another output connected to the third inputs of each first 7 and second 6 blocking blocks of the first rpynip blocking blocks, the first inputs of which are combined and connected to the third inputs of the first and second blocking blocks from the first group of blocking blocks 18 and 17, respectively, the outputs of which are connected to the inputs of the switchgear 19, the other input of which is connected to the output of the threshold voltage generator 8, the inputs and the other output of which are connected respectively to the outputs of the first 7 and second 6 blocking blocks of the first group of blocking blocks and to the input of the threshold element 15, the other inputs and outputs of which are connected to the outputs of the first blocking blocks 7 of the first group of blocking blocks and to the first inputs of the first and second blocking blocks 7. and 6 of the first group and blocks 18 and 17 of the second group of blocking blocks, respectively, and the inputs of the null organ 16, the output of which is connected to the first inputs of the first 18 and second 17 blocking blocks of the second group of blocking blocks whose outputs are connected to each other the inputs of the switchgear 19, the outputs of which are connected to the inputs of the switch 20, one of the inputs and one of. the outputs of which are corresponding to the output and to the INPUT of the command unit 21, respectively, and the other inputs and outputs, respectively, are connected to the outputs and inputs of the corresponding control objects 22.

The system works as follows.

At some time moment i, preceding the moment of switching of one of the control objects 22 with a block of 21 commands, a single impulse coming from the generator 14 clock pulses, the key elements 1 are switched, and their switching time.

"&

where L is the interval

neither

time between two adjacent clock pulses. At the same time, with the same clock pulse, the first and second blocking blocks of the first and second groups of blocking blocks 7 and 6, 18 and 17 are transferred to the locked state. As a result of switching key elements 1, information about the states of control objects 22, for example, in the form of mismatch signals

.KaCtJ, ..., XnltV, where n is the number of control objects 22 arrives at the input of the functional converters 3 and the second functional converters 2. In the functional converters 3 and secondly the functional converters 2, the values are converted to new non-negative values a j Itoin a (to (-j 1, n, respectively, and moreover;, 1о)), j,

where K5, -1 1; X511o) 1u) l

Claims (1)

- the predicted values of the local criterion of the efficiency of the control object 22 of the control, aimed at the subsequent moment of switching if the j -th control object 22 is not controlled by the command block 21, and a to (ioV, i.e. it is assumed that the purpose of the control object 22 is to minimize the corresponding local criterion. The information thus converted is recorded in the storage elements 5 and in the second storage elements 4 and further from the second storage elements 4 in the form of co sponding level voltage is applied to the inputs of the second threshold element 9. The threshold level in the threshold member 9 is given a voltage value U It). supplied to one of its inputs from the output of the generator 12 of the sawtooth voltage, which varies in proportion to the momentum elapsed since (i ./ (tg start of the generator 12 of the sawtooth current) and is determined by the following function Uo. ki, npHt ibT; Uo oi | Mi M ,, Uo, hertz K is a coefficient proportional to the stress determined by the angle of the curvature voltage to the time axis (); T is the oscillation period of the sawtooth generator (). Starting the generator 12 sawtooth the momentum is effected by a pulse and one of the Q inputs is delayed by time 1C 4 (&} equal to the delay time of delay element 13). The amount of time (determined by the time required for converting 3 It-oU. 1 values a) .0 ji (j T) and storing the latter. At the time point when the threshold level of the second threshold element 9 reaches the maximum value of Oi, a signal at the output of the element is equal to a g tio "iaxajlt at 1, which sets the threshold value for the third threshold element 11. At the same time same signal g generator of the sawtooth 12 vernets to its original state and -b and {a). and the second key elements are 1Q at the time of the switch. In this case, from the storage elements 5, the inputs of the third threshold element 11 will receive information on the quantities a j ItoU j-Mi). and then in the same threshold element, a j (to) (i T7n) is compared with the value of aort aav (o) If for all jsI.n, then j output tert its threshold element 11 will turn into an excited state. As a result, block 21 of commands is connected via switch 20 to the jo -m to control object 22. If at least one of the values of 01 (to) turns out to be (to xaf (to), then at one of the outputs of the third threshold element 11 connected to the first group of blocking blocks 6 and 7, there is an impulse that translates these blocks into The unlocked state to the fully transformed information about the state of the control objects 22 will go to the threshold voltage generator 8, in which the zero threshold value HociUol NT 3 is formed qiiioVqtl or ie: J Qilio-a lto) de O is a set of indexes and elements equal to By and tio - the number of the first 7 and second 6 bloir yushik blokovpervoy group blokiruschih blocks, finding schihs in deblokiroannom state (in this case coincides with P As). The resulting value of V is set-. the value of the threshold in the threshold element W; Further, in the threshold element 15 pr “c & b9 compare the values of a j Itg) received by it from the outputs of the first blocking bohochs 7 -... of the rudimentary group of blocking blocks, with the value of the threshold EQ (check Qli () condition) portions of the outputs of this element produce non-zero signals (threshold element 15 passes signals for which the allio condition is satisfied) Vo, translating the first and second blocks to the outputs corresponding to these outputs. crowning blocks 7 and 6 from the first group of blocking blocks in the unlocked state. Thereafter, new threshold values V, ° CLM are formed in the threshold voltage driver 8. . .Z.-W. . . J.e3; aj iol qj (io), o, j l4 -a; itol where | - a set of indices with the number of elements equal to n c, with the number of the first 7 or second-6 blocking blocks of the first group of blocking blocks remaining in the unlocked state, and the above described blocking operation of some blocks 6 and 7 of the first group of blocking blocks is repeated in view of the new threshold value, a similar process of blocking the first 7 and second 6 blocking blocks from the first group of blocking blocks. will continue until for all remaining at the (k-1) -th step of the quantities a j c i tp) the condition is satisfied where YI / is the k-th step) V "threshold value Q. ltoV" Kito) keC | k) where jk is the set of jadexes jc with the number of elements equal to A, and h is the number of the first 7 or second 6 blocking blocks of the first group of blocking blocks remaining in a locked state. At the time of completing the process of searching for the final threshold value Vn, which stopped the insensitivity level of the centralized control system, the first 18 and second 17 blocking blocks of the second group of blocking blocks are transferred to zero block by the signal from the zero authority 16. This leads to the fact that part of the converted information about the state of the control objects hobjects 22, left after the dropout, produced by blocking part of the blocking blocks 7 and 6 of the first group of blocking blocks, goes to switchgear 19. The same device also receives information about: final threshold value V | i. Then, in the switchgear 19., the distribution function is formed, in accordance with which random occurrence of one of the outputs occurs, for example j | th, this device. With this block. 21 commands through the switch 2O are connected to the i -th control object 22. The application of the proposed system of price management allows, for some states of controlled objects, to select from a set a control object that is obviously in the worst state. The condition q Oj for all j 1, g means that even when applying to a JQ control object, the predictive values of its local criterion are not less than the predicted values of the criteria of other objects to which no controlling influence is given, i.e. needs to be controlled. Therefore, the inclusion of a command block in the control loop of a j ″ object reduces the possibility of an emergency occurring in a group of controlled objects and thereby makes centralized control more reliable. The invention is centralized control system for aut. St. X 555380, about tl and -. with what purpose increase the reliability of the system, it contains the second and third threshold elements, reltepaTop sawtooth voltage, the delay element and the number of control objects, the second functional converters, the second storage elements, the second blocking blocks in the first group of blocking blocks, the second blocking blocks in the second group of blocking blocks and the second key elements, the outputs of each of which are connected in series through the corresponding second functional converter and the second storage element of the connection s to the fourth input of the corresponding second blocking block of the first group of blocking blocks and to the corresponding input of the second threshold element, whose output is under the keys to the first inputs of the second key elements, to one of the inputs of the third threshold element, and to the first input of the sawtooth generator the input of which is connected respectively to one of the inputs of the second threshold element and to the output of the delay element, the input of which is connected to one of the outputs of the clock generator, is different whose output is connected to the second inputs of the second blocking blocks of the first group of blocking blocks and to the second inputs of the second blocking blocks of the second group of blocking blocks, the output, the fourth, third and first inputs of each of which are respectively connected to the input of the switchgear, to the output of the corresponding second blocking the block of the first group of blocking blocks, to the first input of the corresponding first blocking block of the first group of blocking blocks and to the output of the null organ, the corresponding inputs s podklyucheny- whose first inputs of the second blocks of the first blocking blocking group blocks the third inputs of which are connected to one. to the input of the third threshold element, the other inputs and the corresponding inputs of which are connected respectively to the switch goings and to the output of the second key elements, the second BXOD of each of which is connected to the output of the corresponding storage element. Sources of information taken in charge during examination 1. USSR author's certificate Ms 555380, cl. Q 05 B 15 / O2, .75 (prototype).