SU962856A2 - Digital program control system - Google Patents

Description

(54) DIGITAL PROGRAM MANAGEMENT SYSTEM

12

The invention relates to a regulating and controlling system 1M of general purpose, in particular, to digital software control systems, and can be used to control lazy stacker cranes, elevators, elevators and other mobile ones. objects with a certain number of address points.

According to the main author. St. A well-known digital software control system comprising a sequentially connected converter code-voltage, a feedback control unit and an adder, the second input of which is connected to the output of the program setting block, and the higher-order outputs of which are connected to the OR element, the logical block of the higher-order bit. , one input of which is connected to the output of the OR element, and the other inputs of which are connected to the corresponding outputs of the lower bits of the adder, and the outputs of which are connected to the corresponding inputs reobrazovatel code - A voltage.

The known system allows with high accuracy to automatically control a moving object, and, when approaching a given

 It is possible to smoothly slow down the object by reducing the control voltage applied to the control unit.

A disadvantage of the known system is the inability to implement a smooth acceleration of the object. This is due to the fact that when the object is launched, the code — the voltage from the logical block of the higher-order selection — is supplied to the high-order / GD. the difference code of the current and specified addresses of the position of the moving object and the output of the transducer body code - voltage is the voltage corresponding to the maximum velocity of the object.

Thus, acceleration is carried out with the maximum attainable moving object of accelerations. The acceleration that occurs during acceleration can significantly exceed the permissible for a given moving object or transportable load, which leads to a decrease in the reliability and service life of the object. In addition, if the operator is on a moving object and moves with it, the resulting

30 during acceleration, acceleration can significantly exceed the permissible human norms. . The purpose of the invention is to expand the functionality of the system, i.e. getting the opportunity to implement Lpavny programmable acceleration of a moving object. The goal is achieved by the fact that in a digital program system a multi-control program containing serially connected transducers. Code - voltage, amplifier, control unit, feedback sensor and adder, the input of which is connected to the output of the program setting unit The sum of the torus is connected to the inputs of the OR element, the logic block for allocating the higher bit, one input of which is connected to the output of the element: OR, and the other inputs are connected to the corresponding outputs of the lower digits of the adder, the outputs the higher allocation unit is connected to the corresponding inputs of the code-voltage converter, a comparison circuit, a switch, a buffer register and an initial sdres register connected by the first input to the output, a feedback sensor, and the second input to the second output of the task block are entered the program, and the output to the first input of the switch, connected by the second input to the third output of the program setting block, the output to the third input of the adder, and the third input to the first output of the program setting block and the first buffer register tra ,, second inputs connected to respective outputs of the adder, and the output - to the first input of a comparison circuit, a second input coupled with the output of the feedback sensor, and output - with an input block specifying program. The drawing is a block diagram of the system. The system contains a higher-order allocation logic 1, a code-voltage converter 2, an amplifier 3, a control unit 4, a feedback sensor 5, an adder b, an element OR 7; the register 8 of the initial address, the buffer register 9, the circuit 10, the switch 11, the program setting block 12. The system works in the following way. After the set address has been set and the Start command is sent from the program setting block 12, a command is sent to the initial address register, and the code of the object's initial address is written to the register 8 of the start address. On the second command coming from the program 12, the program is programmed. The x "1 switch 11, the adder 6 and the buffer register 9, the inputs of the adder 6 are supplied with the code values of the initial address Ad from the feedback sensor 5 and, from the program setting unit 12 via the switch 11, the code values of the specified address B. Formed in To the torus 6, the address code from the path (-2.) is recorded and stored in the buffer register 9. After this, the program setting unit 12 issues a command that sends the value of the starting address code .AO from the register 8 of the starting address to the input of the adder 6 . At the output of the adder 7, a difference is generated between the code of the current address A from the feedback sensor 5 and the code of the initial address of the AO from the register 8 of the starting address and the resulting difference is added one: AO + 1. Since at the moment of the beginning of the movement the code of the current starting address is equal, To the input of the converter 2, a code is a voltage through the logical block 1 of the higher-order allocation, the low-order bit of the difference code formed on the adder 6 is applied. Transducer 2 code - the voltage across the amplifier 3 outputs a voltage corresponding to the minimum speed by moving the object. On the control unit 4, moving the object. When an object moves, the code of the current address supplied to the input of the adder 6 from the feedback sensor 5 changes, and the difference between the codes supplied from the output of the adder 6 through the high-order logic block 1 to the input of the converter 2 code - voltage increases, As a result, the converter 2 codes the voltage alternately through the amplifier 3 to the control unit 4, the increasing voltage, forming a histogram of the law of acceleration of the device. ; Acceleration of the device continues until m + 1 bits appear in the difference code of the current and starting addresses. Since the bits from m + 1 to m + n are fed to the logical block 1 of the higher bit, through the element OR 7 , the voltage at the output of the converter 2 code - the voltage in the presence of any of these bits becomes maximum. In this case, the device moves at a constant maximum speed. In comparison circuit 10, a midpoint path address code stored in buffer register 9 and a current address code received from feedback sensor 5 are compared.

If these codes match, the comparison circuit 10 generates a signal applied to the prpciMMH task unit 12. According to this signal, the block 12 of the rear program issues a command to the switch 11 g adder 6. On this command, the switch 11 switches and the code of the specified address is supplied to the third input of the adder 6 from the program set block 12. The adder 6 generates the difference code of the given and current addresses.

If there is a bit difference in the received code, large t, the device continues to move with a constant maximum speed, since these bits are fed from the adder b to the higher-order logical block 1 through the element OR 7. When the object further moves, the difference code of the specified and current addresses are reduced. As soon as the t least significant bits remain in it, the object is braked. The higher-order logical unit 1 in turn outputs the higher-order address-difference bits to the code-voltage converter 2, which in turn outputs the specified voltages forming the histogram. the law of inhibition of the object.

Thus, the indicated combination of features allows to expand the functional capabilities of the system, i.e. perform smooth progrshoduemye acceleration of a moving object.

which improves the quality of the rolling object.

Compared with the known devices, the proposed digital software control system allows avoiding overclocking of the moving object acting on the load and the operator during acceleration, which ultimately leads to the expansion of the device application area.

Claims (1)

Invention Formula Digital software control system for aut. St. 624210, characterized in that, in order to expand the functionality of the capabilities, a comparison scheme, a switch, a buffer — a register and a register of the initial address,, connection are introduced into it; First entrance to exit the feedback sensor, the second input to the second output of the program setting block, and the output to the first input of the Switch, connected by the second input to the third output of the program setting block, the output to the third. {input cyNMaTopa, and the third input with the first output of the program setting block and with the first input of the buffer register connected by the second inputs to the corresponding outputs of the adder, and the output to the first input of the comparison circuit connected by the second input to the output of the feedback sensor, and the output - with the input of the program task block. Start