Compound controlling method for semiconductor refrigerator fast heating/refrigerating system

A compound control and rapid heating technology, which is applied in control/adjustment system, speed/acceleration control, temperature control using electric mode, etc., can solve the problem of large nonlinear thermal inertia, lower biochemical reaction efficiency, system dynamic performance and stability State performance can not reach the optimal state and other problems

Inactive Publication Date: 2007-01-03
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Its defect is that, on the one hand, the PID algorithm cannot fundamentally overcome the contradiction between rapidity and accuracy in the temperature control process; on the other hand, due to the large thermal inertia and obvious nonlinearity of the temperature control object of the semiconductor refrigerator, Therefore, the dynamic performance and steady-state performance of the system under PID control cannot reach the optimal state.
This reduces the efficiency of various biochemical reactions such as gene amplification

Method used

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  • Compound controlling method for semiconductor refrigerator fast heating/refrigerating system
  • Compound controlling method for semiconductor refrigerator fast heating/refrigerating system
  • Compound controlling method for semiconductor refrigerator fast heating/refrigerating system

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Embodiment Construction

[0045] The following embodiments are provided in conjunction with the technical solutions of the present invention:

[0046] Such as figure 1 As shown, G(s), C(s) and F(s) are the transfer functions of the control object, the feedback controller and the feedforward controller, respectively. r is the set temperature, e is the control deviation, u is the control effect, y is the output temperature, u Bang-Bang Output for Bang-Bang controller, u Feedback is the output of the feedback controller, u Feedforward is the output of the feedforward controller.

[0047] (1) The object model is a first-order inertial model containing only two parameters (gain k and time constant T):

[0048] G ( s ) = T ( s ) I ( s ) ...

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Abstract

A compound temperature control method for the quick heating / cooling system of the semiconductor refrigerator. The invention leads the feed forward, the feedback and the Bang-Bang controlling method in the temperature control system according the module of the controlling object. It uses the Bang-Bang controlling method firstly and changes to the 'feed forward with the PID'mode when the deviation is less than the threshold quantity. They are all done by the controller. The feed forward and the Bang-Bang control reach the tracking quickly and the feedback control is the PID control with the changing structure which match to the feed forward to celebrate the speed of the rising or dropping the temperature and decrease the tracking error. It can decreases the 36% of the rising time with the 80% overshoot at the same time.

Description

technical field [0001] The invention relates to a method in the technical field of automatic control, in particular to a compound control method for a rapid heating / refrigerating system of a semiconductor refrigerator. Background technique [0002] Semiconductor refrigerator is a widely used temperature control carrier. It can realize heating and cooling operations at the same time, simplifies the system structure and temperature control method, and improves the system reliability. Rapid temperature control is a time-optimized control technology that makes the temperature of the object reach the target temperature as quickly as possible under the premise of ensuring the accuracy of steady-state temperature control. Temperature control during various chemical or biological reactions often requires the use of this technique to improve reaction efficiency. For example, the periodic thermal cycle of the gene amplification reaction requires precise tracking and control of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D13/02G05D23/19
Inventor 袁景淇邱宪波
Owner SHANGHAI JIAO TONG UNIV
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