CN205594335U - Developments assignment PID heating control system suitable for high vacuum environment - Google Patents
Developments assignment PID heating control system suitable for high vacuum environment Download PDFInfo
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- CN205594335U CN205594335U CN201620118190.1U CN201620118190U CN205594335U CN 205594335 U CN205594335 U CN 205594335U CN 201620118190 U CN201620118190 U CN 201620118190U CN 205594335 U CN205594335 U CN 205594335U
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- heating
- temperature
- assignment
- pid
- vacuum environment
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Abstract
The utility model discloses a developments assignment PID heating control system suitable for high vacuum environment relates to the process control field of material heating under the high vacuum environment, and it is that the overshoot high temperature problem of heating process provides under the high vacuum environment in order to solve. Having increased dynamic assignment operation ware in traditional PID heating control system, having realized a lot of of PID controller, dynamic assignment, according to the feedback temperature of current status and the target temperature value of settlement, the middle target temperature value of composing is reach by the assignment operation formula computing. The assignment temperature that changes makes PID controller parameter make adjustment rapidly according to target temperature in the middle of dynamic, in time adjusts heating power, and when the feedback temperature was close the heating target temperature who sets for, reduction heating power that can be timely, quick stopped even heating, make full use of under the vacuum environment calorescence of object, reduced the overshoot temperature of heating control process by a wide margin.
Description
Technical field
This utility model relates to the process control technology field of object heating under high vacuum environment.
Background technology
Along with proportional-integral-differential (Proportion-Integration-Differentiation, PID) controls reason
The appearance of opinion, PID controller based on various algorithms are widely used in many industries, particularly control neck in temperature
Territory, the heating controller of 90% is designed based on PID principle.
Traditional PID heating control system is as it is shown in figure 1, its operation principle is basistThe feedback temperature of moment heating target
Degree, wants to compare with given target temperature, using current temperature error values as the input of PID controllere(t), by ratio system
Numberkp, integration time constantTI；Derivative time constantTD.Obtain the output of PID controlleru(t)
, (1)
The output of PID controlleru(t) control power governor output, change heater heating power, make to add
The temperature of heat target raises, and the feedback temperature value of controller changes, and temperature error values constantly diminishes, until it reaches preset
Target temperature.
Generally, for preventing the high-temperature oxydation phenomenon occurred under atmospheric environment, the hot test of material must be in fine vacuum
Carry out under protection environment.Although, the introducing of the control principles such as fuzzy theory, neutral net, ROBUST THEORY, emerge a lot of improvement
Pid control algorithm, to adapt to the complexity of heating process, meet the computer heating control under some special environment.But, fine vacuum
Under environment, the thermal inertia of object is big, Changing Pattern is complicated, and too high temperature overshoot often occurs in traditional PID control method, holds
The structure of destructible test material and performance.
Utility model content
The too high overshoot temperature produced for heating process under suppression high vacuum environment, the utility model proposes a kind of dynamic
The PID heating control system of assignment, its control principle is according to the temperature between Current Temperatures value of feedback and target heating temperature value
It is poor to spend, the dynamic PID temperature controller assignment temperature that changes, and then controls heater power, completes heating target heating process
PID controls.
For achieving the above object, this utility model adopts the following technical scheme that, heating control system bag of the present utility model
Including PID controller, power governor, heater, heating target and temperature survey part, PID controller passes through power governor control
The heating power of heater processed, heater directly carries out heat treated to heating target, and heating target is provided with temperature survey part,
Its structural feature is: also including dynamic assignment operation device, pre-set target temperature value in dynamic assignment operation device, temperature survey part will
The feedback temperature value of heating target feeds back in dynamic assignment operation device, and dynamic assignment operation device is assigned to after calculation process
PID controller.
Method for heating and controlling of the present utility model is: target temperature value first inputs to dynamic assignment operation device, by dynamically composing
Value arithmetic device calculates intermediate objective temperature value according to the feedback temperature value of current heating target, then is assigned to PID control dynamically
Device processed, PID controller is reconciled the output of power governor according to the intermediate objective temperature value of dynamically change, is changed heater
Heating power, make the temperature of heating target raise, the feedback temperature value that dynamic assignment operation device receives changes, temperature
Error amount constantly diminishes, until it reaches the target temperature preset.
Preferably, in heating process dynamic assignment operation device PID controller is carried out repeatedly, dynamic intermediate objective temperature value
Assignment.
Preferably, along with the continuous rising of heating target temperature, the temperature between feedback temperature value and target temperature value
Difference is less than 1 DEG C, and the intermediate objective temperature value of dynamic assignment operation device output is equal to target temperature value, dynamic assignment operation device work
Work stops, PID controller by the temperature stabilization of heating target in the temperature of target temperature value.
Preferably, if by the feedback temperature value of current heating target as the input of dynamic assignment operation deviceT i, target adds
Hot temperatureT S, then intermediate objective temperature value is by the assignment operation formula in dynamic assignment operation device
It is calculated, in formulaNFor the assignment number of times of dynamic assignment operation device,N=0,1,2……。
This utility model beneficial effect:
Different from traditional PID method for heating and controlling, this utility model adds dynamic assignment in heating control system
Arithmetical unit, it is achieved that to PID controller repeatedly, dynamic assignment, according to feedback temperature and the target of setting of current state
Temperature value, the intermediate objective temperature value composed is calculated by assignment operation formula, and the assignment temperature of change promotes PID controller
Parameter is made adjustment rapidly according to dynamic intermediate objective temperature value, is adjusted heating power in time, when feedback temperature connects
During the heating target temperature closely set, it is possible in time, quickly reduce heating power, even stop heating, take full advantage of true
The thermal inertia of object under Altitude, significantly reduces the overshoot temperature of computer heating control process.
Accompanying drawing explanation
Fig. 1 is prior art PID heating control system figure；
Fig. 2 is dynamic assignment PID heating control system figure of the present utility model；
1-target temperature value, 2-dynamic assignment operation device, 3-PID controller, 4-power governor, 5-heater, 6-adds
Heat target, 7-temperature survey part.
Detailed description of the invention
The 2 pairs of this utility model do further technology and describe below in conjunction with the accompanying drawings:
As in figure 2 it is shown, this utility model includes PID controller 3, power governor 4, heater 5, heating target 6 and temperature
Degree measuring piece 7, PID controller 3 controls the heating power of heater 5 by power governor 4, and heater 5 is directly right to heating
As 6 carry out heat treated, heating target 6 is provided with temperature survey part 7, also includes dynamic assignment operation device 2, dynamic assignment operation
Pre-set target temperature value 1 in device 2, the feedback temperature value of heating target 6 is fed back to dynamic assignment operation device 2 by temperature survey part 7
In, dynamic assignment operation device 2 is assigned to PID controller 3 after calculation process.
This utility model is currently heated the feedback temperature value of object by reading, and by itself and the target temperature value set
Compare, when feedback temperature value is less than target temperature value, then dynamically assignment operation device starts.
Dynamically the operation principle of assignment operation device is as follows: the feedback temperature setting current heated object is transported as dynamic assignment
Calculate the input of deviceT i, according to target heating temperatureT S, then the output of dynamic assignment operation deviceT i+1For:
, (2)
In formulaNFor the assignment number of times of dynamic assignment operation device,N=0,1,2……。
Assignment operation formula (2) calculatesT i+1As intermediate objective temperature value input to PID controller, regulation heating
The heating power of object；Along with the rising of heating target temperature, constantly measure its feedback temperature, work as feedback temperatureT FnEqual to current
Intermediate objective temperature under stateT i+1, enter into dynamic assignment procedure next time.
Along with assignment number of timesiIncrease, the temperature of heating target is stepped up, with heating target temperature move closer to,
The delta temperature value of intermediate objective temperature value is increasingly bordering on 0, when feedback temperature value is equal to target temperature value, then dynamically assignment is transported
Calculation device quits work, and now, the assignment temperature of PID controller is the target temperature value of heating.
The dynamic assignment PID heating means that the utility model proposes, by the repeatedly dynamic assignment to PID controller, promote
In PID controller, PID regulation parameter is made adjustment rapidly according to the intermediate objective temperature of dynamically change, adds heater in time
Thermal power is adjusted, when feedback temperature value is close to the target temperature value set, it is possible in time, quickly reduces and adds hot merit
Rate, even stops heating, takes full advantage of the thermal inertia of object under vacuum environment, make heating target progressively reach target setting and add
Hot temperature, effectively prevent too high temperature overshoot.
This utility model is not limited to above-mentioned preferred embodiment, every have with this utility model same or like seemingly
Technical scheme, belong to protection domain of the present utility model.
Claims (1)
1. it is applicable to the dynamic assignment PID heating control system of high vacuum environment, including PID controller, power governor, heating
Device, heating target and temperature survey part, PID controller controls the heating power of heater by power governor, and heater is straight
Connecing and heating target is carried out heat treated, heating target is provided with temperature survey part, it is characterised in that: also include that dynamic assignment is transported
Calculating device, pre-set target temperature value in dynamic assignment operation device, the feedback temperature value of heating target is fed back to dynamic by temperature survey part
State assignment operation device, dynamic assignment operation device is assigned to PID controller after calculation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620118190.1U CN205594335U (en) | 2016-02-07 | 2016-02-07 | Developments assignment PID heating control system suitable for high vacuum environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620118190.1U CN205594335U (en) | 2016-02-07 | 2016-02-07 | Developments assignment PID heating control system suitable for high vacuum environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205594335U true CN205594335U (en) | 2016-09-21 |
Family
ID=56928339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620118190.1U Expired - Fee Related CN205594335U (en) | 2016-02-07 | 2016-02-07 | Developments assignment PID heating control system suitable for high vacuum environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205594335U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045279A (en) * | 2016-02-07 | 2017-08-15 | 渤海大学 | Suitable for the dynamic assignment PID heating control systems and method of high vacuum environment |
-
2016
- 2016-02-07 CN CN201620118190.1U patent/CN205594335U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045279A (en) * | 2016-02-07 | 2017-08-15 | 渤海大学 | Suitable for the dynamic assignment PID heating control systems and method of high vacuum environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 Termination date: 20170207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |