共查询到17条相似文献,搜索用时 156 毫秒
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为了提高板形控制精度,对凸度平坦度控制耦合关系以及板形板厚控制耦合关系进行深入的研究分析,并采用相应的解耦控制策略是十分必要的。在板形板厚解耦设计的基础上,分析了不同控制方案下凸度平坦度控制之间的耦合影响关系,建立了相应的凸度平坦度耦合模型,并对其耦合特性进行了分析比较;之后,针对耦合模型特点进行凸度平坦度半解耦设计,以补偿凸度控制和平坦度控制之间的耦合影响关系,进而设计凸度平坦度解耦控制系统,并给出热连轧机组凸度平坦度解耦控制应用策略,组成完整的动态板形控制系统。在某厂1580 mm四辊七机架热连轧机组投入使用后,较好地补偿了板形板厚控制、凸度平坦度控制之间的耦合影响关系,板形控制精度明显提高。 相似文献
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潘登 《金属材料与冶金工程》2009,37(3):62-64,67
针对精馏塔温度控制这个非线性耦合对象,提出了一种模糊神经元解耦智能控制器。该控制器避免了精馏塔精确数学模型的推导和严格计算解耦算式的麻烦,是模糊逻辑控制与神经元PID控制器的结合。同时,分析了控制器的结构及其学习算法。通过仿真试验,得到了较为理想的控制效果。 相似文献
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In connection with the characteristics of multi-disturbance and nonlinearity of a system for flatness control in cold rolling process, a new intelligent PID control algorithm was proposed based on a cloud model, neural network and fuzzy integration. By indeterminacy artificial intelligence, the problem of fixing the membership functions of input variables and fuzzy rules was solved in an actual fuzzy system and the nonlinear mapping between variables was implemented by neural network. The algorithm has the adaptive learning ability of neural network and the indetermi- nacy of a cloud model in processing knowledge, which makes the fuzzy system have more persuasion in the process of knowledge inference, realizing the online adaptive regulation of PID parameters and avoiding the defects of the traditional PID controller. Simulation results show that the algorithm is simple, fast and robust with good control performance and application value. 相似文献
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模糊神经网络炉温自学习控制系统 总被引:9,自引:1,他引:8
提出一种模糊神经网络自学习控制方法,并应用于熟料窑炉温度控制系统中。经实验仿真和应用结果表明,该控制方案可改善具有时变及大纯滞后的炉温控制系统,其性能优于一般Fuzzy控制。 相似文献
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针对不确定机器人轨迹跟踪控制,提出了基于模糊滑模方法下的神经网络自适应控制,其中RBF神经网络集中补偿系统的不确定性,利用带边界层滑模变结构方法消除了神经网络的逼近误差,并通过模糊方法动态确定边界层宽度,很好的解决了滑模控制中的抖振现象。仿真实例表明,该控制律能保证误差的快速收敛性及对参数不确定性和外部扰动的鲁棒性。 相似文献
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冷轧板形控制系统是一个强耦合、非线性的多变量复杂系统,难以建立精确的数学模型,一般常规的控制方法难以取得令人满意的控制效果。本文依据现场的轧制数据,提出采用自适应竞争遗传算法优化神经网络对其进行建模,采用模糊控制,可实现实时控制,并利用MATLAB编程,仿真结果显示了算法的有效性和时效性。 相似文献
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In the traditional flatness pattern recognition neural network, the topologic configurations need to be rebuilt with a changing width of cold strip. Furthermore, the large learning assignment, slow convergence, and local minimum in the network are observed. Moreover, going by the structure of the traditional neural network, according to experience, the model is time-consuming and complex. Thus, a new approach of flatness pattern recognition is proposed based on the CMAC (cerebellar model articulation controllers) neural network. The difference in fuzzy distances between samples and the basic patterns is introduced as the input of the CMAC network. Simultaneously, the adequate learning rate is improved in the error correction algorithm of this neural network. The new approach with advantages, such as high learning speed, good generalization, and easy implementation, is efficient and intelligent. The simulation results show that the speed and accuracy of the flatness pattern recognition model are obviously im proved. 相似文献