Non-liner control system of space-division king-tower and method
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A non-linear control and control method technology, applied in the field of control system and method design of the main air separation tower, can solve the problem that the linear control scheme is difficult to obtain the control effect and the like
Inactive Publication Date: 2010-11-10
ZHEJIANG UNIV
View PDF0 Cites 5 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] In order to overcome the complex dynamic characteristics of the existing air separation main tower, the strong nonlinearity and the strong coupling between the loops, the traditional methods such as PID and other linear control schemes are difficult to obtain better control effects. The invention provides a nonlinear control system and method of the air separation main tower that can adapt to the dynamic characteristics of the air separation main tower, strong nonlinearity and coupling between loops, and provide good control effects
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0047] refer to Figure 1 ~ Figure 3 , a non-linear control system of the air separation main tower, including an on-site intelligent instrument 2 directly connected with the air separation main tower 1, a database for storing historical data, and a host computer 6, and the intelligent instrument 2, the database, and the host computer 6 in sequence connected. The upper computer 6 is a nonlinear controller, and the nonlinear controller includes:
[0048] The composition deduction module 10 is used to deduce the composition according to the detected temperature and pressure data, and the formulas are (1), (2):
[0049] Y 1 = α α - 1 - 10 ( a - b T 1 + ...
Embodiment 2
[0099] refer to Figure 1 ~ Figure 3 , a nonlinear control method for the air separation main tower, which is realized according to the following steps:
[0100] The first part, system initialization
[0101] 1) Set the two-component set value Y of the upper tower product of the air separation main tower in the nonlinear controller 6 1set , X nset , and the system sampling period.
[0102] 2) Set the process state parameters of the nonlinear model predictive control module; by using the mechanism equation to write the nonlinear differential equation model, the following approximate process model description can be obtained:
[0103] x&(t)=f(x(t), z(t), u(t), p) (3)
[0104] 0=g(x(t), z(t), u(t), p) (4)
[0105] Contains two kinds of equations, differential equations f, and algebraic equations g, the parameter vector is defined as p, where x&(t) is the first derivative of the differential variable, x is the differential variable, z is the algebraic variable, and u is the c...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a non-liner control system of a space division main tower and a method, comprising an on-site intelligent instrument, a database and an upper computer, wherein the on-site intelligent instrument is directly connected with the space-division king-tower, the database is used for storing historical data, and the on-site intelligent instrument, the database and the upper computer are successively connected; the upper computer comprises a non-liner controller which utilizes non-liner dynamic optimized on-line operation to obtain an output value of a control variable at present; the non-liner controller comprises a component deduction module and a non-liner model prediction control module. In addition, the invention provides a non-liner control method of the space-division king-tower. Compared with the control system, such as traditional PID and the like, the invention not only realizes the stable operation of two-end components and has better dynamic control effect.
Description
technical field [0001] The invention relates to the field of control system and method design of an air separation main tower, in particular, to a nonlinear control system and a method for an air separation main tower. Background technique [0002] The air separation plant is a device used to separate the components in the air to obtain high-purity industrial gases such as oxygen, nitrogen, and argon. It is a supporting unit operation of many industries related to the lifeline of the national economy, such as chemical industry, metallurgy, electronics, energy, aerospace, food and beverage, etc. An important indicator of the level of development. Air separation operation is a complex process involving low temperature, multi-equipment, long process, complex operation and high safety production requirements. In production, the purity of oxygen, nitrogen, and argon products is often required to be as high as 99%, which belongs to the problem of high-purity rectification contro...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more