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选矿生产过程综合自动化系统 总被引:1,自引:1,他引:0
针对中国选矿行业自动化程度低 ,生产成本高 ,资源消耗大 ,环境污染严重的问题 ,提出了由制造执行系统和过程控制系统两层结构组成的选矿生产过程综合自动化系统 ,讨论了系统的结构、功能和控制策略。并将该系统成功应用于中国酒钢集团选矿厂 ,实现了选矿生产过程的优化控制、优化运行和优化管理 ,取得了明显的应用成效。 相似文献
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提高齐大山选厂回水利用率的试验研究随着工业生产的发展,我国的淡水资源,尤其是工业用水愈加紧张。选矿生产是消耗水资源的较大工业用户,为了节约淡水资源,提高选矿厂生产的回水利用率,减少选矿生产过程中排水对环境的污染,这已成为矿山广大科技工作者的研究课题。... 相似文献
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本文针对选矿-拜耳法工艺的经济性与资源利用率之间可能存在的问题开展了分析研究。铝土矿资源利用率高低首先与采用工艺相关,拜耳法的资源利用率低于烧结法。当选矿尾矿铝硅比低于拜耳法赤泥铝硅比时,提高精矿铝硅比不仅将提高经济效益而且不降低资源的利用率。 相似文献
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选矿自动化技术从根本上改变了传统选矿技术落后的局面,因为传统的选矿工艺,生产人员凭经验操作,对生产过程的控制做不到及时准确,所以工艺参数波动很大,影响精矿品位的提高和回收率的提升。选厂自控系统能够及时准确的指示选矿过程各参数的变化,自动调节有关变量,使选矿工艺参数指标达到最佳值。 相似文献
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In this paper, according to the characteristics of large load and uneven distribution of upper wall, large jacking height and high requirements for synchronous jacking precision in the separation process of the upper and lower wall of WK-35 electric excavator,a large-scale mining equipment in the mine, a hydraulic synchronous jacking method with four-point uneven load is proposed, which combines with the fuzzy PID control method which is suitable for nonlinear and time-varying complex system control to realize the synchronous jacking of excavator. Based on the synchronous jacking hydraulic system of WK-35 electric excavator, a simulation model of AMESim hydraulic system is built for dynamic simulation. The analysis results show that the changes of different loads only affected the piston velocity or oil velocity of the hydraulic cylinder in the final stable state. Both the balance control valve and the throttle speed control valve can quickly reach the stable state within 0~1s, which is conducive to better response performance when the hydraulic system enters the steady state. 相似文献
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中厚板轧机液压厚度控制系统是一个具有抗扰性的控制系统,但系统响应速度过慢,轧机出口有较大厚度偏差。基于传递函数理论,建立了液压AGC系统的动态数学模型,对带有常规PID控制器和模糊自校正PID控制器的厚度控制系统进行了仿真研究。仿真结果表明,模糊自校正PID控制器具有更好的控制效果,系统具有更强的鲁棒性。 相似文献
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针对大型矿山中浮选机所采用的永磁同步电机(PMSM)控制系统具有强耦合、强干扰、非线性、不确定性的问题,提出一种基于自适应进化粒子群(AEPSO)算法优化的大型浮选机用PMSM滑模控制方法。首先,介绍工程背景并建立出大型浮选机用PMSM的转矩数学模型。其次,通过设计非奇异终端滑模面和指数趋近律控制律推导出滑模控制器的结构,并利用AEPSO算法优化滑模控制器的性能参数。第三,通过Simulink仿真研究该控制方法下电磁转矩控制情况。结果表明,相对于PID控制和传统滑模控制方法,采用AEPSO算法优化后的滑模控制方法极大地提高了PMSM的控制性能,满足大型矿山中浮选机的应用需求。最后,通过江西铜业武山铜矿现场的工程试验,验证了所提方法实际应用的可行性。另外,该控制方法具有较强的通用性和灵活性,其设计思路、仿真分析和试验经验为电机控制领域的研究人员提供了参考。 相似文献
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The control system of an autonomous underwater vehicle (AUV) is introduced. According to the control requirements of the AUV, a simple but practical adaptive PID control method is de- signed. The semi-physical simulation is done to test the feasibility of the control system. The neural network idea and the structure of PID controller are referred to design the adaptive PID controller. An intelligent integral is introduced to improve control precision. Compaed with traditional PID con- trollers, the adaptive PID controller has simple structure, good online adjusting ability, fast conver- gence and good robustness. The simulation experiments also show that the adaptive PID control sys- tem has high precision and fine antijamming ability. 相似文献
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The hydraulic roll bending control system usually has the dynamic characteristics of nonlinearity, slow time-variance and strong outside interference in the rolling process, so it is difficult to establish a precise mathematical model for control. So, a new method for establishing a hydraulic roll bending control system is put forward by cerebellar model articulation controller (CMAC) neural network and proportional-integral-derivative (PID) coupling control strategy. The non-linear relationship between input and output can be achieved by the concept mapping and the actual mapping of CMAC. The simulation results show that, compared with the conventional PID control algorithm, the parallel control algorithm can overcome the influence of parameter change of roll bending system on the control performance, thus improve the anti-jamming capability of the system greatly, reduce the dependence of control performance on the accuracy of the analytical model, enhance the tracking performance of hydraulic roll bending loop for the hydraulic and roll bending force and increase system response speed. The results indicate that the CMAC-PID coupling control strategy for hydraulic roll bending system is effective. 相似文献
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《Baosteel Technical Research》2019,13(3)
During strip casting,the thickness deviation of casting strip directly affects the quality of the hot-rolled sheet because the casting strip needs to be rolled only once. To accurately control the gap between casting rolls and reduce the thickness deviation of the casting strip,a conceptual design of a prestressed twin-roll caster is proposed herein; this caster involves the setting of a constant pressure balancing cylinder between the chocks of two casting rolls. The balancing cylinder hydraulic system adopts a three-way servo valve that controls the hydraulic cylinder.The parameters of the hydraulic power components are determined using the principle of optimal power matching,and the hydraulic system model of the balancing cylinder is thus established. The dynamic analysis and simulation of the hydraulic system are performed using finite element model to obtain relevant evaluation indexes. Finally,the hydraulic system is corrected using proportional-integral-derivative( PID) correction to achieve a well-controlled effect. Thus,the engineering requirements of the strip casting process can be met. 相似文献
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轧机液压压下系统非线性振动诱因分析 总被引:1,自引:0,他引:1
具有液压压下系统的轧机被广泛应用在板带生产过程中,为解决液压压下系统引起的轧机非线性振动问题,在闭环控制情况下分别研究了不同阻尼系数、泄漏系数以及控制器比例系数3种系统参数对压下系统垂振的影响。考虑压下缸非线性液压弹簧力建立了轧机液压压下系统垂振模型,通过振动位移时域图和位移-速度相图分析了不同系统参数与系统垂振的相关性。仿真结果表明,由于轧机液压压下系统采用传统PID控制器,液压系统本身阻尼系数、泄漏系数等具有慢时变特性,会使得原有PID控制可能出现功能失效情况,造成系统垂振的发生,该研究为后续设计控制器消除液压系统参数变动引起的垂振有一定的理论和工程实际意义。 相似文献