【作者】 彭亮；

【导师】 王随平；

【作者基本信息】 中南大学 ， 控制科学与工程， 2012， 硕士

【摘要】 烧结是铅锌冶炼工艺的重要环节,是将不同成分的原料、燃料和溶剂等按一定比例混合配料形成烧结混合矿。烧结的基本要求是给料准确,即按照计算所确定的配比,连续稳定地给料,把实际下料量的波动值控制在允许的范围内,避免引起烧结矿强度与还原性发生变化。基于烧结给料过程的现场工艺详细分析及模型研究,建立了给料对象的传递函数。由于烧结给料过程的固有特性以及受到现场许多不确定因素的影响,决定了烧结给料过程具有非线性大时滞、模型参数变化的特点。针对这些特点,提出了神经内模控制器,它具备对偶稳定性、理想控制器和零稳态偏差特性,可以很好的抵抗干扰和处理模型失配的问题,同时它还能很好的处理纯滞后对烧结给料控制系统的不利影响。并利用单神经元的特性,对内模控制器的滤波器时间常数进行实时调节,这一方法增强了内模控制对被控对象变化的适应能力。通过仿真实验证明了采用神经内模控制策略的有效性,它不仅具有良好的动、静态性能,还有很强的鲁棒性和自学习能力。开发了烧结给料自动化控制系统,实现了对给料过程参数与工艺流程的实时监控,通过对给料过程的优化控制,保证了烧结过程的平稳运行,提高了烧结块质量和产量,降低了现场操作人员的劳动强度。更多还原

【Abstract】 Sintering is an important part in the lead and zinc smelting process, it blends the raw material, solvent and fuel with different components, according to the certain ratio to carry on the blending and obtain the sintering blending minerals. The basic requirement of the sintering is feeding precisely, That is feeding continuously and stably in accordance with the calculated ratio, thus can limit the fluctuation of the actual feeding amount within the allowable range, otherwise it would cause the changes of sinter strength and reducibility.Based on the detailed analysis of the site process and the model of the sintering feeding process, the transfer function of feed object is derived. Due to the inherent characteristics of the sintering feeding process and the influence by many uncertain factors in the site, the control process has the characters of high nonlinearity, large lag and varying of the model parameters.Based on these characters, the neural internal model controller is proposed. It has the characteristics of dual stability, ideal controller and zero steady state error, so it can be a good resistance to interference and solve the problem of model mismatch. At the same time, it can eliminate the delay and the adverse effects of the sintering feeding control system. Using the characteristics of single neuron, the filter time constant of the internal model controller is adjusted on the real time. This approach enhances the ability of the internal model control to adapt to changes of the controlled object.By the simulation experiment, the control strategy is effective, and this control method can achieve not only good dynamic and static performance, but also strong robustness and self-study capability simultaneously. The sintering feeding automatic control system is developed. The real-time monitor of feeding process parameters and the technological process are realized. And the optimal control of the feeding process can ensure the smooth operation of the sintering process. Thus the sinter quality and quantity are improved, while the labor intensity of the operator is reduced.更多还原