共查询到20条相似文献,搜索用时 93 毫秒
1.
提出了基于氨氮前馈的溶解氧模糊自适应PID控制。将其在AAO工艺溶解氧控制的数学模型上进行仿真研究,并对其和常规PID控制的电耗进行比较,得到了较好的节能效果。 相似文献
2.
用模糊推理解决玻璃生产过程控制中的相关耦合 总被引:1,自引:0,他引:1
针对浮法玻璃生产过程控制中多变量系统的相关耦合现象,将模糊控制应用于解耦环节,介绍了模糊解耦的概念和原理及实现方法,并在仿真实验和实际使用的基础上,表明其优越性。 相似文献
3.
针对水泥回转窑生产过程非线性时变特性,在FCM聚类分析的基础上结合神经网络设计一种新型的模糊控制器,与传统的模糊系统相比,减少了规则数目,同时系统具备一定的学习能力和较快的收敛速度。将其应用于水泥回转窑的温度控制,运行结果表明,控制效果良好,能满足生产工艺要求。 相似文献
4.
介绍模糊评判的基本步骤并将其应用于纸浆漂白过程中,实现了对漂白纸浆质量的在线评判,方法简单可行。 相似文献
5.
模糊评判在化工区地下水水质评价中的应用 总被引:2,自引:0,他引:2
应用模糊数学对化工生产地区地下水水质进行综合评判,将现状监测值用隶属变描述水质的模糊界限。其结果表明化工区地下水均已受到严重污染,不适饮用。与指数法相比,更能客观准确地反映水体的质量状况,且对水源合理分配、节约用水等都有较大的参考价值。 相似文献
6.
构建了DDE模块,通过其实现了将自编的模糊PID控制程序与GE公司的过程控制组态软件CIMPLICITY进行动态数据交换,从而实现工业发酵过程溶氧浓度的优化控制。 相似文献
7.
应用结构模糊优化理论对板翅式换热器进行多目标优化设计;给出了构造隶属函数及确定目标函数权重的方法,通过线性加权法将多目标化为单目标求解。应用此软件设计了一台换热器,其实际使用结果表明完全达到设计要求。 相似文献
8.
9.
针对黄骅港二期翻车机主体在翻转过程中出现主体抖动、逆变器跳闸情况,指出其设计上的缺陷,并提出模糊PID实现同步控制的控制系统改进方案,解决上述问题,提高主从电机同步性,确保设备稳定运行。 相似文献
10.
对科研院所管理人员在奖金分配问题上,引入了岗位评价和绩效考核机制,并以此为基础,以模糊集合理论建立了包含岗位系数和绩效考核系数在内的奖金分配数学模式,较科学合理地体现了按劳分配原则 相似文献
11.
Woranee Paengjuntuek Paisan Kittisupakorn Amornchai Arpornwichanop 《Journal of the Chinese Institute of Chemical Engineers》2008,39(3):249-256
Crystallization process has been widely used for separation in many chemical industries due to its capability to provide high purity product. To obtain the desired quality of crystal product, an optimal cooling control strategy is studied in the present work. Within the proposed control strategy, a dynamic optimization is first preformed with the objective to obtain the optimal cooling temperature policy of a batch crystallizer, maximizing the total volume of seeded crystals. Two different optimization problems are formulated and solved by using a sequential optimization approach. Owing to the complex and nonlinear behavior of the batch crystallizer, the nonlinear control strategy which is based on a generic model control (GMC) algorithm is implemented to track the resulting optimal temperature profile. The optimization integrated with nonlinear control strategy is demonstrated on a seeded batch crystallizer for the production of potassium sulfate. 相似文献
12.
There are many factors affecting the combustion process in incinerators; one of them is how to control the temperature of the incineration and reduce the emissions. In this work, a second-order model of the adaptive fuzzy control strategy is adopted to stabilize the combustion temperature and the results demonstrate that the adaptive control strategy with the adaptive factors is a good method to achieve the goal of incineration temperature control. 相似文献
13.
分析聚酯固相装置原料温度在工艺系统过程中存在的问题,介绍6820反应器的温度控制优化方案,给出为改善系统反应温度控制的方案设计和组态内容。 相似文献
14.
多变量分散型预测控制应用研究 总被引:5,自引:1,他引:4
贾青 《化工自动化及仪表》2000,27(6):1-4
研究了多变量分散型预测控制在应用中的主要问题,并提出了在多变量过程控制中采用各子系统分散建模、分散预测控制并辅以基于规则的智能协调,以解决多变量系统的解耦和优化控制问题。其工程应用优点是建模简单、优化计算量小并且保证控制的安全性。 相似文献
15.
16.
控制变量参数化方法作为一种化工过程动态优化的梯度搜索算法,其求解效率过于依赖初始给定轨迹。目前初始轨迹一般都是设定在边界值或中间值,缺乏科学依据,从而大大影响了算法的收敛速度。针对这一问题,提出了一种粒子群优化(PSO)与控制变量参数化方法混合的策略,首先利用粒子群优化对间歇化工过程最优控制量进行求解,结果作为控制变量参数化方法初始给定轨迹,进行二次优化。双层优化的混合策略提高了控制变量参数化方法的收敛速度和粒子群优化算法的求解精度。将混合策略应用于两个间歇化工过程优化控制实例,仿真结果表明了该算法对求解化工过程动态优化问题具有可行性和有效性。 相似文献
17.
High purity distillation processes have been widely used in the chemical industry. These processes have unique characteristics including higher order, nonlinearity, strong coupling, and time delay. In order to overcome these control issues, an active disturbance rejection generalized predictive control strategy is designed for the distillation column with time delay. The strategy combines the structures of both active disturbance rejection control and generalized predictive control. A delayed designed extended state observer can estimate the model uncertainty and external disturbance, and a non‐incremental generalized predictive control is proposed to deal with the integrators with time delay. Therefore, it rejects disturbances well and has the capability of overcoming time delay. The computation load is also less than the generalized predictive control. In the simulation experiments, the proposed strategy is compared with robust control and model predictive control. The results illustrate that the proposed control strategy has improved robustness performance in dealing with model uncertainties, various disturbances, and time delay. 相似文献
18.
19.
A spouted bed is used to dry many and different materials ranging from granules to pastes and suspensions. This work presents an implementation and tests of an advanced control strategy on a spouted bed dryer. Water was used as the ideal paste for tests. An adaptive control algorithm GPC (Generalized Predictive Control) was implemented. A microcomputer was used to maintain humidity and temperature set points of air in the dryer by manipulating electric power of heat exchanger and paste feed flow rate. Instrumentation was set-up with different sensors, interface and final control elements for operation. Stability and performance analysis of the control strategy was accomplished. A robust stable controller was obtained which had also encouraged us to extend the investigation of this control strategy to the drying of other pastes. 相似文献
20.
工业过程多变量系统的辅助常规控制设计 总被引:2,自引:0,他引:2
利用PID控制器对多变量系统进行控制,主要采取分散常规控制或解耦控制的策略。对于存在耦合的系统,分散常规控制无法消除各变量间的相互扰动,而直接设计动态解耦矩阵有时候会存在困难,静态解耦的效果却并不明显。针对已设计好分散常规控制器的方系统,以解耦为目标和原则,设计多变量系统中分散常规控制方案剩余配对的控制器作为辅助控制器,以频域近似的方法整定其PID参数,实现多输入多输出的控制结构,降低了各变量的相互耦合作用,提高了控制性能。通过对Shell公司的典型控制问题的辅助控制器设计与仿真实验,取得了比原有分散常规控制与静态解耦控制更好的控制效果,验证了控制策略的可行性与有效性。 相似文献