CN103676709B - A Multifunctional Parameterized Solenoid Valve Group Control Method - Google Patents

Abstract

A multifunctional parameterized solenoid valve group control method, since the control of various solenoid valves on the ground system level test platform puts forward the requirements of feedback control and cycle control on the basis of sequential control, and requires parameterization to meet Test requirements for different products and different working conditions. The multifunctional parameterized solenoid valve group control method of the present invention integrates various control requirements, and designs a solenoid valve group control method based on multiple conditions to judge the output, which not only meets the previous timing control requirements, but also realizes feedback control and Cycles control the simultaneous execution of multiple functions.

Description

A Multifunctional Parameterized Solenoid Valve Group Control Method

technical field

The invention relates to a multifunctional parameterized solenoid valve group control method for a ground test system, belonging to the field of solenoid valve automatic control.

Background technique

With the deepening of the ground test of the pressurized delivery system of the launch vehicle, the system-level test has become an important means to verify the comprehensive performance and dynamic matching of the pressurized delivery system, and the various requirements for the system-level test platform are increasing. The higher the pressure, especially the more stringent requirements for automatic control, the various control solenoid valves in the test system not only put forward sequential control requirements, but also put forward the requirements for synchronous pressure feedback control and cycle control, and require the applicability of control methods Strong, can meet the test requirements of different models and different working conditions at the same time.

In the past PLC-based control system program design methods, most of the timer output is compared with the set value, and the pressure feedback value is compared with the set value to realize the switch control of the solenoid valve group, and the cycle is realized by repeatedly executing a fixed program. Control, in general, can only meet unilateral control requirements. According to the traditional programming method, it is difficult to realize the integration of multiple functions of sequential control, pressure feedback control and loop control, and the function of parameter setting is not easy to realize. Therefore, it is very necessary to study a multi-functional, parameterized and wide-ranging electromagnetic valve control method.

Contents of the invention

The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide a multifunctional parameterized electromagnetic valve group control method, which not only meets the requirements of the solenoid valve group sequence control, but also realizes the synchronization of multiple functions of feedback control and cycle control It is mainly used on the pressurized conveying system test platform to meet the diverse requirements for automatic control of large-scale and complex ground tests.

Technical solution of the present invention is:

A method for controlling a multifunctional parameterized solenoid valve group, the steps are as follows:

(1) Set the control parameters of the solenoid valve group, the control parameters include solenoid valve sequence control mode, solenoid valve feedback control mode, start value and end value of solenoid valve working time, solenoid valve opening pressure value and closing pressure value , the start value and end value of the cycle time period, and the number of cycles; the solenoid valve sequence control method includes automatic and manual, and the solenoid valve feedback control method includes automatic and manual;

(2) Send a start command to the solenoid valve group, and start the timer at zero when the start command is sent, and set the cycle number value to 1, and the timing value of the timer is used as the time reference for the sequential control of the solenoid valve group, and then Execute step (3);

(3) Perform state judgment on each solenoid valve in the solenoid valve group in turn to determine the current opening and closing state of each solenoid valve. The state judgment of each solenoid valve includes time judgment and pressure judgment, and the time judgment is performed first and then the pressure judgment is performed. Make pressure judgments;

(4) If the state judgment of all solenoid valves in the solenoid valve group has been completed, then perform step (5);

(5) Power on all open solenoid valves in the solenoid valve group, and power off all closed solenoid valves in the solenoid valve group;

(6) Determine whether the number of cycles has reached the set number of cycles. If the number of cycles has not reached the preset number of cycles, execute step (7) to judge the cycle time. If the number of cycles has reached, execute step (8);

(7) Determine whether the timer time value is greater than or equal to the cycle time end value set in step (1), if the condition is not met, then directly execute step (8); if the condition is met, set the timer time value to the set value The initial value of the specified cycle time, and add 1 to the value of the cycle number, and then perform step (8);

(8) Control the solenoid valve group according to whether the stop command is sent to the solenoid valve group. If the stop command is not sent, skip to step (3); if the stop command is sent, the timer time value is set to 0, and the The number of cycles is set to 1.

In the step (3), the state of each solenoid valve in the solenoid valve group is judged in turn to determine the current open and close state of each solenoid valve as follows:

(2.1) Time judgment: when the solenoid valve timing control mode is manual, maintain the current state of the solenoid valve, and directly enter step (2.2) to judge the pressure of the solenoid valve; when the solenoid valve timing control mode is automatic, judge the timing Whether the time value of the solenoid valve is between the starting value and the ending value of the working time of the solenoid valve set in step (1), if the condition is met, it is determined that the current state of the solenoid valve is open, and then enter step (2.2) to continue the operation of the solenoid valve Pressure judgment, otherwise determine that the current state of the solenoid valve is closed, and continue to judge the state of other solenoid valves;

(2.2) Judging the pressure: When the feedback control mode of the solenoid valve is manual, maintain the current state of the solenoid valve, and then continue to judge the status of other solenoid valves. When the feedback control mode of the solenoid valve is automatic, judge according to the following principles: If the pressure feedback value is greater than the closing pressure value of the solenoid valve set in step (1), then determine that the current state of the solenoid valve is closed; if the pressure feedback value is less than the set solenoid valve opening pressure value, then determine that the current state of the solenoid valve is open , in other cases, maintain the current state of the solenoid valve, and continue to judge the state of other solenoid valves.

The beneficial effect of the present invention compared with prior art is:

(1) Through the optimization of the judgment algorithm, the integration of the three functions of sequential control, feedback control and loop control is realized;

(2) The control parameters of the solenoid valve group can be set according to actual needs, which greatly improves the applicability and flexibility of the method.

Description of drawings

Fig. 1 is the flow chart of the present invention.

detailed description

Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

The control of various solenoid valves on the ground test platform of the booster delivery system of the launch vehicle puts forward the requirements of feedback control and cycle control on the basis of sequential control, and requires parameterization to meet the test requirements of different products and different working conditions. The multifunctional parameterized electromagnetic valve group control method of the present invention integrates various control requirements, not only meets the previous sequential control requirements, but also realizes the synchronous execution of multiple functions of feedback control and cycle control.

As shown in Figure 1, a multifunctional parameterized electromagnetic valve group control method, the implementation steps are as follows:

(1) Set the control parameters of the solenoid valve group, the control parameters include solenoid valve sequence control mode, solenoid valve feedback control mode, start value and end value of solenoid valve working time, solenoid valve opening pressure value and closing pressure value , the start value and end value of the cycle time period, and the number of cycles; the solenoid valve sequence control method includes automatic and manual, and the solenoid valve feedback control method includes automatic and manual;

(2) Send a start command to the solenoid valve group, and start the timer at zero when the start command is sent, and set the cycle number value to 1, and the timing value of the timer is used as the time reference for the sequential control of the solenoid valve group, and then Execute step (3);

(3) Perform state judgment on each solenoid valve in the solenoid valve group in turn to determine the current opening and closing state of each solenoid valve. The state judgment of each solenoid valve includes time judgment and pressure judgment, and the time judgment is performed first and then the pressure judgment is performed. Make pressure judgments;

Specifically:

(3.1) Time judgment: when the solenoid valve timing control mode is manual, maintain the current state of the solenoid valve, and directly enter step (3.2) to judge the pressure of the solenoid valve; when the solenoid valve timing control mode is automatic, judge the timing Whether the time value of the solenoid valve is between the starting value and the ending value of the working time of the solenoid valve set in step (1), if the condition is met, it is determined that the current state of the solenoid valve is open, and then enter step (3.2) to continue the operation of the solenoid valve Pressure judgment, otherwise determine that the current state of the solenoid valve is closed, and continue to judge the state of other solenoid valves;

(3.2) Judgment of pressure: When the feedback control mode of the solenoid valve is manual, maintain the current state of the solenoid valve, and then continue to judge the status of other solenoid valves. When the feedback control mode of the solenoid valve is automatic, judge according to the following principles: If the pressure feedback value is greater than the closing pressure value of the solenoid valve set in step (1), then determine that the current state of the solenoid valve is closed; if the pressure feedback value is less than the set solenoid valve opening pressure value, then determine that the current state of the solenoid valve is open , in other cases, maintain the current state of the solenoid valve, and continue to judge the state of other solenoid valves.

(4) If the state judgment of all solenoid valves in the solenoid valve group has been completed, then perform step (5);

(5) Power on all open solenoid valves in the solenoid valve group, and power off all closed solenoid valves in the solenoid valve group;

(6) Determine whether the number of cycles has reached the set number of cycles. If the number of cycles has not reached the preset number of cycles, execute step (7) to judge the cycle time. If the number of cycles has reached, execute step (8);

(7) Determine whether the timer time value is greater than or equal to the cycle time termination value set in step (1), if the condition is not met, then directly execute step (8); if the condition is met, set the timer time value to the set value The initial value of the specified cycle time, and add 1 to the value of the cycle number, and then perform step (8);

(8) Control the solenoid valve group according to whether the stop command is sent to the solenoid valve group. If the stop command is not sent, skip to step (3); if the stop command is sent, the timer time value is set to 0, and the The number of cycles is set to 1.

Example:

It is assumed that the ground test system includes a booster solenoid valve, an exhaust solenoid valve and a simulated tank, the booster solenoid valve controls the passage of the gas medium into the simulated tank, and the exhaust solenoid valve controls the passage of the gas medium out of the simulated tank, When more gaseous medium enters the simulated tank than exits the simulated tank, the pressure of the simulated tank increases.

(1) Set the control parameters of the booster solenoid valve: the timing control mode of the booster solenoid valve is automatic, the start value and end value of the working time of the booster solenoid valve are 0s and 10s respectively, and the feedback control mode of the booster solenoid valve is automatic , the opening pressure value of the booster solenoid valve is 0.5MPa, and the closing pressure value of the booster solenoid valve is 0.6MPa;

Set the control parameters of the exhaust solenoid valve: the timing control mode of the exhaust solenoid valve is automatic, the start value and end value of the exhaust solenoid valve working time are 1s and 15s respectively, and the feedback control mode of the exhaust solenoid valve is manual;

Set the start value and end value of the cycle time period as 0s and 15s respectively, and the number of cycles as 3 times;

(2) Send a start command to the solenoid valve group, the time when the start command is sent is zero to start the timer, and set the number of cycles to 1;

(3) Assume that the status of the solenoid valve group is judged at 0.5s after the start command is sent, and the pressure feedback value at this time is 0.3MPa;

First, judge the state of the booster solenoid valve, and the timing control mode of the booster solenoid valve is automatic, then judge whether the time value of the timer (0.5s) is at the initial value of the working time of the booster solenoid valve set in step (1) ( 0s) and the end value (10s), if the condition is satisfied, the pressure judgment of the booster solenoid valve will continue. The feedback control mode of the booster solenoid valve is automatic, and the solenoid valve will be opened according to the pressure feedback value (0.3MPa) less than the set value. Pressure value (0.5MPa), then determine the current state of the booster solenoid valve is open.

Then judge the state of the exhaust solenoid valve, and the timing control mode of the exhaust solenoid valve is automatic, then judge whether the timer time value (0.5s) is at the initial value of the exhaust solenoid valve working time set in step (1) ( 1s) and the end value (15s), if the condition is not met, it is determined that the current state of the exhaust solenoid valve is closed.

(4) The status judgment of the booster solenoid valve and the exhaust solenoid valve has been completed, then perform step (5);

(5) According to the current state of the boost solenoid valve is open, power on the boost solenoid valve; according to the current state of the exhaust solenoid valve is closed, power off the exhaust solenoid valve;

(6) Judging whether the current number of cycles (1 time) reaches the set number of cycles (3 times), if the condition is not met, then execute step (7);

(7) Determine whether the timer time value (0.5s) is greater than or equal to the cycle time termination value (15s) set in step (1), if the condition is not met, then directly execute step (8);

(8) If no stop command is sent, jump to step (3).

In the same way, it can be seen that within the time period from 0s to 10s, if the feedback pressure of the simulated tank is greater than or equal to 0.6MPa, the booster solenoid valve is closed, and if the feedback pressure of the simulated tank is less than 0.5MPa, the booster solenoid valve is opened In the rest of the time period, the boost solenoid valve is closed; in the time period from 1s to 15s, the exhaust solenoid valve is always in the open state, in the rest of the time period, the exhaust solenoid valve is in the closed state; in the time period from 0s to 15s Section, will repeat the cycle 3 times, after 3 cycles, the timer continues to count, the boost solenoid valve and the exhaust solenoid valve remain closed until the stop command is sent, the timer count value is set to 0, and the cycle number value is set to 1.

At present, the method of the present invention has been applied to the ground test platform of the pressurized conveying system. The test shows that after the method of the present invention is applied, the functional requirements of the solenoid valve group timing control, pressure feedback control, and cycle control when carrying out system-level tests are met, which greatly improves the performance of the system. The applicability and flexibility of the test platform control system are improved.

The content that is not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.

Claims (2)

1. a multi function parameter solenoid valve group control method, is characterized in that step is as follows:

(1) set the controling parameters of solenoid valve group, described controling parameters comprise solenoid valve sequential control mode, solenoid valve feedback controling mode, the initial value of electromagnetic valve work time and stop value, solenoid valve opening pressure value and closing presure value, cycling time section initial value and stop value, cycle index; Solenoid valve sequential control mode comprises automatic and manual, and solenoid valve feedback controling mode comprises automatically with manual;

(2) startup command is sent to solenoid valve group, to send the moment of startup command for zero point, start timer, and described cycle index value is set to 1, the clocking value of timer, as the time reference to the sequential control of solenoid valve group, performs step (3) afterwards;

(3) successively condition adjudgement carried out to each solenoid valve in solenoid valve group thus determine the open and-shut mode that each solenoid valve is current, condition adjudgement is carried out to each solenoid valve and comprises time judgement and pressure judgement, and advanced line time carries out pressure judgement after judging;

(4) if all solenoid valve condition adjudgement complete all in solenoid valve group, then step (5) is performed;

(5) solenoid valves being in opening all in solenoid valve group are powered on, to solenoid valve power-off being in closure state all in solenoid valve group;

(6) judge whether cycle index has reached the cycle index of setting, if do not reach default cycle index, then perform step (7) and carry out judgement cycling time, if reach cycle index, then perform step (8);

(7) judge whether timer periods value is more than or equal to stop value cycling time of setting in step (1), if do not satisfy condition, then directly performs step (8); If satisfy condition, then timer periods value is set to initial value cycling time of setting, and cycle index value is added 1, then perform step (8);

(8) whether according to send to cease and desist order to solenoid valve group and to control solenoid valve group, cease and desist order if do not send, then redirect performs step (3); Cease and desist order if send, timer periods value is set to 0, and cycle index value is set to 1.

2. a kind of multi function parameter solenoid valve group control method according to claim 1, is characterized in that: carry out condition adjudgement to each solenoid valve in solenoid valve group successively in described step (3) thus determine that the current open and-shut mode of each solenoid valve is specially:

(2.1) time judgement is carried out: when solenoid valve sequential control mode is manual, maintain solenoid valve current state, directly enter step (2.2) and pressure judgement is carried out to this solenoid valve, when solenoid valve sequential control mode is automatic, then judge between the electromagnetic valve work time initial value whether timer periods value is in setting in step (1) and stop value, if satisfy condition, determine that current electromagnetic valve state is for opening, then enter step (2.2) to continue to carry out pressure judgement to this solenoid valve, otherwise determine that current electromagnetic valve state is for closing, proceed other solenoid valve condition adjudgement,

(2.2) pressure judgement is carried out: when solenoid valve feedback controling mode is manual, maintain solenoid valve current state, then proceed the judgement of other solenoid valve states, when solenoid valve feedback controling mode is automatic, then judge according to following principle: if pressure feedback value is greater than the closed electromagnetic valve force value of setting in step (1), then determine that current electromagnetic valve state is for closing; If pressure feedback value is less than the solenoid valve opening pressure value of setting, then determine that current electromagnetic valve state is for opening, and then maintains solenoid valve current state, proceeds other solenoid valve condition adjudgement in all the other situations.