CN-122000192-A - Superconducting coil precise winding step length control method and system for nuclear fusion device

CN122000192ACN 122000192 ACN122000192 ACN 122000192ACN-122000192-A

Abstract

The invention discloses a method and a system for controlling the precision winding step length of a superconducting coil for a nuclear fusion device, wherein the method comprises the steps of obtaining various material parameters of a YBCO strip, determining a reference step length according to the various material parameters, and generating an initial feeding instruction of a servo based on the reference step length so as to start the winding of the superconducting coil; the method comprises the steps of obtaining actual gesture data and environment temperature of a superconducting coil in a winding period in real time, determining step dynamic compensation quantity at the current moment according to the actual gesture data and the environment temperature obtained in real time, and adjusting servo feeding according to the reference step and the step dynamic compensation quantity at the current moment. The device utilizes the method. The invention can obviously improve the winding precision, effectively adapt to the material discreteness, realize the quality closed-loop control and improve the system reliability.

Inventors

MA CONG
LEI KAI
HU CHUNQUAN
WANG CHENYANG
WANG HONGYU
LIU JIAQI
JIANG GUANPING
ZONG XU
Sheng leipeng
ZHANG TIAN
QIAO YUXUAN
Bian Zhenhong
HE LIWEI

Assignees

北京电力设备总厂有限公司

Dates

Publication Date: 20260508
Application Date: 20260212

Claims (10)

1. The method for controlling the precision winding step length of the superconducting coil for the nuclear fusion device is characterized by comprising the following steps of: Acquiring various material parameters of a YBCO strip, determining a reference step length according to the various material parameters, and generating a servo initial feeding instruction based on the reference step length so as to start superconducting coil winding; acquiring actual attitude data and environmental temperature of the superconducting coil during winding in real time; Determining the step dynamic compensation quantity at the current moment according to the real attitude data and the environmental temperature acquired in real time; And adjusting the feeding of the servo machine according to the reference step length and the step length dynamic compensation quantity at the current moment.
2. The method for controlling the precision winding step length of the superconducting coil for the nuclear fusion device according to claim 1, wherein determining the reference step length according to the parameters comprises: determining the reference step according to : Wherein, the For the correction factor of the material, the correction factor is, Is the modulus of elasticity of the material, For the thickness of the strip material, In order to achieve a yield strength, the material, Is poisson's ratio.
3. The method for controlling the precision winding step length of the superconducting coil for the nuclear fusion device according to claim 1, wherein determining the step length dynamic compensation amount at the current moment according to the actual posture data and the environmental temperature acquired in real time comprises: Determining step tolerance at the current moment according to various material parameters and the environmental temperature at the current moment; Determining a step deviation value at the current moment according to the actual gesture data and the environmental temperature, and further determining a process standard deviation of the step deviation value by combining the historical step deviation value; Obtaining a process capability index according to the step length tolerance and the process standard deviation at the current moment; According to the process capability index, adjusting an initial proportional coefficient and an initial integral coefficient to obtain a proportional coefficient and an integral coefficient at the current moment; and determining the step dynamic compensation quantity at the current moment according to the step deviation value at the current moment, the history step deviation value, and the proportional coefficient and the integral coefficient at the current moment.
4. The method for precisely winding step length control of superconducting coil for nuclear fusion device according to claim 3, wherein determining step length tolerance at the current moment according to each material parameter and ambient temperature at the current moment comprises: Determining step size tolerance according to : Wherein, the For the design diameter of the superconducting coil, For the total number of winding turns of the strip, As the difference between the ambient temperature at the current time and the ambient temperature at the initial time, In order to be able to achieve a thermal expansion coefficient of the material, The coefficients are modified for the process.
5. The method for precisely winding step length of superconducting coil for nuclear fusion device according to claim 4, wherein determining step length deviation value at current time according to the actual gesture data and the ambient temperature, and further determining step length deviation value process standard deviation by combining history step length deviation value comprises: predicting the deformation error of the superconducting strip at the current moment according to the environmental temperature; Obtaining the actual step length at the current moment according to the actual gesture data; And subtracting the deformation error and the reference step length from the actual step length at the current moment to obtain the step length deviation at the current moment.
6. The method for controlling a precision winding step length of a superconducting coil for a nuclear fusion device according to claim 5, wherein the step length tolerance and the process standard deviation at the current time are used for obtaining a process capability index, comprising: the process capability index is obtained by : Wherein, the Is the process standard deviation.
7. The method for controlling the precision winding step length of the superconducting coil for the nuclear fusion device according to claim 6, wherein the step length adjusting the initial proportional coefficient and the initial integral coefficient according to the process capability index to obtain the proportional coefficient and the integral coefficient at the current moment comprises the following steps: the proportionality coefficient at the current moment is obtained by Sum and integral coefficient : Wherein, the And The initial scale factor and the initial integration factor respectively, Is a regulatory factor; When the process capability index is Greater than or equal to a first threshold In the time-course of which the first and second contact surfaces, ; When the process capability index is less than a first threshold And is greater than a second threshold When (1): ; when the process capability index is less than or equal to a second threshold value When (1): N is a nonlinear strengthening factor.
8. The method for controlling the precision winding step length of a superconducting coil for a nuclear fusion device according to claim 7, wherein determining the step length dynamic compensation amount at the current time according to the step length deviation value at the current time, the history step length deviation value, and the proportional coefficient and the integral coefficient at the current time comprises: Determining the step dynamic compensation amount of the current time t according to the following formula Wherein, the And The proportional coefficient and the integral coefficient of the current instant t, The step offset value at the current time t.
9. A superconducting coil precision winding step control system for a nuclear fusion device using the method of any one of claims 1 to 8, comprising: the reference step length determining module is used for obtaining various material parameters of the YBCO strip, determining a reference step length according to the various material parameters, and generating a servo initial feeding instruction based on the reference step length so as to start superconducting coil winding; the monitoring module is used for acquiring actual attitude data and environmental temperature of the superconducting coil in real time during winding; The compensation determining module is used for determining the step dynamic compensation quantity at the current moment according to the actual gesture data and the environmental temperature acquired in real time; and the adjusting module is used for adjusting the feeding of the servo machine according to the reference step length and the step length dynamic compensation quantity at the current moment.
10. A terminal comprises a processor and a storage medium, and is characterized in that: The storage medium is used for storing instructions; the processor being operative according to the instructions to perform the steps of the method according to any one of claims 1-8.

Description

Superconducting coil precise winding step length control method and system for nuclear fusion device Technical Field The invention belongs to the technical field of nuclear fusion engineering and superconducting magnet manufacturing, and particularly relates to a method and a system for controlling a precise winding step length of a superconducting coil for a nuclear fusion device. Background As a clean, efficient and sustainable new energy, the nuclear fusion energy has the remarkable advantages of rich fuel reserves, environmental friendliness, no long-service-life radioactive waste and the like, and is an important development direction for solving the global energy crisis. The superconducting magnet is one of the core components of a nuclear fusion device, and the performance of the superconducting magnet directly determines the stability and efficiency of a nuclear fusion reaction. With the continuous progress of nuclear fusion technology, nuclear fusion devices are developing towards higher field strength and larger size, and unprecedented stringent requirements are put on the manufacturing precision of superconducting coils. Among superconducting magnet coils for nuclear fusion devices, a cic (Cable-in-Conduit Conductor, in-tube Cable conductor) superconducting magnet coil is widely used in large nuclear fusion devices such as CFETR (chinese fusion engineering experiment stack), ITER (international thermonuclear fusion experiment stack) and the like due to its excellent current capacity, thermal stability and mechanical strength. In the manufacturing process of the CICC superconducting magnet coil, precise winding of the superconducting coil is one of key procedures, and the control accuracy of the feeding amount of the step-length servo directly influences core indexes such as the geometric shape, inter-turn gaps, stress distribution and the like of the coil, so that the magnetic field performance and the operation reliability of the superconducting magnet are further influenced. However, the feeding amount control technology of the step-length servo in the existing superconducting coil winding process faces a plurality of key technical problems, and the improvement of the manufacturing precision of the superconducting coil is severely restricted. These key technical challenges are mainly manifested in: (1) The problem of the discreteness of material characteristics is that the superconducting coils for the nuclear fusion device at present mainly adopt YBCO (yttrium barium copper oxide) superconducting tapes and other high-temperature superconducting materials, and the YBCO superconducting tapes in different batches and even the same batch have obvious differences in key material parameters such as elastic modulus, yield strength, thermal expansion coefficient and the like. The traditional control method adopts fixed control parameters and a calculation model, and is difficult to adapt to the variability of material characteristics, so that step errors in the winding process are larger, and the consistency of coil precision is affected. (2) The dynamic error compensation capability is insufficient, namely, in the winding process, the motion state of a servo, the gesture change of a coil, the fluctuation of the ambient temperature and the like are all dynamically changed, and the dynamic factors can introduce real-time errors. The error compensation of the existing control system mostly adopts a static compensation strategy, lacks a dynamic compensation mechanism based on real-time monitoring data, is difficult to quickly respond to dynamic errors, and causes insufficient instantaneity and accuracy of feed control. (3) The quality control is lack of systematicness, the prior art mostly adopts a post detection mode for evaluating the winding quality of the superconducting coil, and a real-time quality evaluation and feedback mechanism is lack. Quality problems cannot be found and adjusted in time in the winding process, so that the reject ratio is high, and the manufacturing cost and the period are increased. In order to solve the above technical problems, there is a need in the art to develop a feeding amount control system and method for a superconducting coil precision winding step-length servo machine, which can adapt to the characteristic discreteness of materials, consider the multi-physical field coupling effect, and have the dynamic error compensation capability and the real-time quality control function, so as to meet the high requirement of a nuclear fusion device on the manufacturing precision of the superconducting coil. Disclosure of Invention In order to solve the problems, the invention provides a method and a system for controlling the precision winding step length of a superconducting coil for a nuclear fusion device, which can solve the difficult problem of step length control in the precision winding process of the superconducting coil, are particularly suitable for the precision wi