提高水阻试验电流控制精度的研究  

Research on Improving the Control Precision of Current in Water Resistant Test

作　　者：钟旭[1] 

机构地区：[1]广东技术师范学院电子与信息学院,广东广州510665

出　　处：《自动化仪表》2011年第7期48-51,共4页Process Automation Instrumentation

摘　　要：在机车水电阻试验过程中,存在水温不断变化而造成负载电流调节困难的问题。给出了一种新的电流控制方案,即在组织级、Petri网协调级以及执行级三层混杂递阶控制结构下,采用多控制器并行协同工作模式,结合模糊PID控制,实现了基于恒定水温的负载电流调节。同时,为了克服系统惯性影响,采取了在电流小偏差时引入水位调节的措施。实际应用证明,该方案能有效地提高电流控制的精度。In the process of water resistant test for locomotive,normally the load current is hard to adjust because of the unceasing change of water temperature.So a new current control scheme is given,i.e.under the three-layer mixing hierarchical control structure,these are organization level,Petri net coordinated level and execution level,through working in multi-controllers parallel cooperation mode,and combining with fuzzy PID control,the load current adjustment based on constant water temperature is realized.Meanwhile,in order to overcome the system inertia,the water-level regulation measure is added when the current deviation is small.The practical application proves that this scheme can effectively improve the control of current.

关 键 词：水阻试验 控制精度 模糊PID控制 水位调节 电流调节 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]