A kind of anti-counterfeiting control method of stretching link in polyester staple fiber production process
A polyester staple fiber and production process technology, applied in the field of automatic control, can solve the problems of complex SPSA controller design, influence of control system stability, slow convergence speed, etc., and achieves good transient response performance, simple structure, and fast convergence speed. Effect
Active Publication Date: 2019-04-16
DONGHUA UNIV
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Problems solved by technology
The design of the SPSA controller is more complex (function approximator), the convergence speed is slower, and the controller parameters need to be disturbed in the closed-loop experiment, which may lead to the appearance of waste products
MFAC first establishes a dynamic linearization model for the nonlinear system, obtains the control law according to the control input criterion function, and then obtains the pseudo partial derivative according to the parameter estimation criterion function, and then obtains the control scheme. greater impact
Method used
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Embodiment 1
[0119] The present invention relates to a kind of de-false control method of stretching link in the production process of polyester staple fiber, the structural block diagram of the method is as follows figure 1 As shown, the stretching method adopts a two-stage stretching process. The primary fiber is fed into the cluster drawing machine after forming a large strand of tow with a thickness specified in the process through the clustering link. The fiber stretching speed and stretching temperature in the second-stage stretching link adopt the speed-temperature coupling control method of de-pseudo control. On the basis of data-driven, the anti-false control algorithm is introduced to control the stretching link. This algorithm calculates the virtual reference signal based on the set of candidate controllers, and identifies the non-pseudo-controller at the current sampling time according to the performance index. Compared with the data-driven control method, the anti-alias contro...
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The invention relates to an unfalsified control method used for tensioning link during a short polyester fiber production process. An as-formed fiber is fed to a cluster tensioning machine after being formed into a large fiber beam having a thickness satisfying a technological stipulation in a clustering link, and the speed and the temperature of the cluster tensioning machine during the tensioning of the fiber adopt the speed-temperature coupling control method of the unfalsified control. On a basis of data driving, an unfalsified control algorithm is introduced to control the tensioning link. The above mentioned algorithm is used to calculate a virtual reference signal on a basis of a candidate control set, and an unfalsified controller at a current sampling moment is identified according to a performance index. By comparing with other data driving control methods, the system has good transient responding performance and an ability of maintaining stability of a closed loop system by adopting the unfalsified control. The differential evolution optimization of the parameters of the unfalsified controller acquired according to the unfalsified control is carried out, and after differential mutation operation, intersection operation, and selection operation, the improved unfalsified controller is switched to a closed loop control circuit, and a better control effect is achieved.
Description
technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a false-removing control method for the stretching link in the production process of polyester staple fibers. Background technique [0002] Polyester staple fiber is mainly used in cotton spinning industry, spinning alone or blended with cotton, viscose fiber, linen, wool, vinylon, etc. The obtained yarn is mainly used for clothing weaving, and can also be used for home decoration fabrics, packaging cloth, Filling and insulation materials. When producing polyester staple fiber, multiple strands are assembled together, wetted and oiled, and then dropped into a silk barrel. Then the finished product is obtained through processes such as bundling, stretching, crimping, heat setting, and cutting. The stretching link plays an extremely important role in the post-processing of fiber production and directly determines the final performance of the fiber. The trad...
Claims
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IPC IPC(8): G05B13/04G05B13/02G05D27/02
CPCG05B13/02G05B13/04G05B13/041G05D27/02
Inventor 陈磊丁永生王伟凯任立红郝矿荣
Owner DONGHUA UNIV