共查询到15条相似文献,搜索用时 109 毫秒
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嵌入式系统以其高效、灵活、性价比高的特点,正得到越来越广泛的应用。提出了一种基于常用开发工具的嵌入式操作系统VxWorks的变量监控方法,并结合武钢热轧厂液压AGC软件包的开发,系统地诠释了其编程方法和技巧。 相似文献
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针对轧机液压AGC系统及模糊控制的特点,提出并设计了模糊PI控制器;利用计算机进行了仿真,结果表明该控制器具有良好的控制效果,为轧机液压AGC系统提供了一种新的控制方法。 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
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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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结晶器液压伺服振动装置的神经元自适应PID控制 总被引:1,自引:0,他引:1
针对结晶器液压振动装置的特点,利用神经元的自学习功能构成自适应PID控制器,应用该控制器对结晶器振动装置的液压伺服系统进行控制研究,并给出了设计方法。仿真结果表明,该控制器无需对系统进行建模,它不仅结构简单,而且具有良好的动态性能和较强的鲁棒性和自适应性,易于现场应用。 相似文献
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针对油压机液压系统改造后的问题,分析在插装阀组成的液压系统调试中出现的冲击、振动现象及其产生原因,进而提出利用PLC控制器消除液压系统中冲击的方法。 相似文献
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Based on the hydraulic bending control system, the electrohydraulic servo pressure control simulation model is built. Taking into account of the inadequacy of P-type immune feedback controller, an improved fuzzy immune PID controller is put forward. Drawing on immune feedback principle of biological immune system, the P-type immune feedback controller is connected with conventional PID controller in series and then in parallel with design fuzzy immune PID controller. The controller parameters can be adjusted on line by the rules of immune feedback controller and fuzzy controller. In order to gain the optimal parameters of the controller, the parameters of the controller are off-line optimized by the best multiple optimal model PSO algorithm. The simulation results indicate that the method has characteristics of small overshoot, short adjusting time and strong anti-interference ability and robustness. The quality of the strip shape can be further improved. 相似文献
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Blair L. Stringam 《Canadian Metallurgical Quarterly》2010,136(10):685-691
A downstream controller is designed for an irrigation canal reach using a design technique called quantitative feedback control theory (QFT). The performance of this controller is compared to a proportional, integral, derivative (PID) controller and a linear quadratic regulator (LQR) controller. In this study, the QFT controller is designed for a single canal reach because it best demonstrates how a controller is designed. Previous research for this canal model provided data for comparison. For the operating conditions that are defined in this paper, the QFT controller is shown to have slightly better performance than the PID controller and better performance than the LQR controller. When the canal hydraulic roughness is increased, the QFT controller still performed better than the PID controller. 相似文献
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模糊控制在济钢中板轧机液压APC系统中的应用研究 总被引:1,自引:0,他引:1
将 PID控制器和模糊控制器并联成复合模糊控制器 ,该复合模糊控制方式的动态响应能力和抗干扰能力优于 PID控制。仿真实验证明将复合模糊控制用于轧机液压 APC系统的控制是可行的 相似文献
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Applicability of the cerebellar model articulation controller (CMAC) to structural control is explored, and a training algorithm for the suppression of structural vibration is proposed. The training epochs and controlled responses by both the CMAC and the well-known multilayer neural network are compared in the numerical example. The dynamics of the hydraulic actuator and the time delay of the controller are considered in the simulation. It is concluded that the CMAC is a promising candidate for a structural controller. 相似文献