The real-time measurement of welding temperature field by colorimetric method is described, and with the data acquired from it closed-loop control system of the parameters of temperature field is developed and tested....The real-time measurement of welding temperature field by colorimetric method is described, and with the data acquired from it closed-loop control system of the parameters of temperature field is developed and tested. Experimental results prove that it has high measurement speed (time of a field within 0.5 s) and good dynamic response quality. Weld penetration can be controlled satifactorily under unstable welding condition.展开更多
Due to its inherent safety feature, the modular high temperature gas-cooled reactor (MHTGR) has been seen as one of the best candidates in building next generation nuclear plants (NGNPs). Since the MHTGR dynamics has ...Due to its inherent safety feature, the modular high temperature gas-cooled reactor (MHTGR) has been seen as one of the best candidates in building next generation nuclear plants (NGNPs). Since the MHTGR dynamics has high nonlinearity, it is necessary to develop nonlinear power-level controller which is not only beneficial to the safe, stable, efficient and autonomous operation of the MHTGR but also easy to be implemented practically. In this paper, based on the concept of shiftedectropy and the physically-based control design approach, it is proved theoretically that the simple proportional-differential (PD) output-feedback power-level control can provide globally asymptotic closed-loop stability. Numerical simulation results verify the theoretical results and show the influence of the controller parameters to the dynamic response.展开更多
基于注塑机料筒温度控制器算法性能测试中调试时间长、成本高、安全性差等问题,提出采用硬件在环(HIL)半实物仿真技术进行注塑机料筒温度控制算法性能测试,并基于NI Single-Board RIO 9623控制器设计注塑机料筒温度半实物仿真系统。通...基于注塑机料筒温度控制器算法性能测试中调试时间长、成本高、安全性差等问题,提出采用硬件在环(HIL)半实物仿真技术进行注塑机料筒温度控制算法性能测试,并基于NI Single-Board RIO 9623控制器设计注塑机料筒温度半实物仿真系统。通过分析系统结构,解决了系统搭建中涉及到的关键技术点。最后搭建该仿真系统并进行简单仿真测试,验证该系统设计方案是可行的。料筒温度半实物仿真系统通过Lab VIEW编程,编程快速、简单,运行效率高,人机交互更加方便,测试性能更加优越。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 59475064) and the Natural Science Foundation of Jiangxi Province.
文摘The real-time measurement of welding temperature field by colorimetric method is described, and with the data acquired from it closed-loop control system of the parameters of temperature field is developed and tested. Experimental results prove that it has high measurement speed (time of a field within 0.5 s) and good dynamic response quality. Weld penetration can be controlled satifactorily under unstable welding condition.
文摘Due to its inherent safety feature, the modular high temperature gas-cooled reactor (MHTGR) has been seen as one of the best candidates in building next generation nuclear plants (NGNPs). Since the MHTGR dynamics has high nonlinearity, it is necessary to develop nonlinear power-level controller which is not only beneficial to the safe, stable, efficient and autonomous operation of the MHTGR but also easy to be implemented practically. In this paper, based on the concept of shiftedectropy and the physically-based control design approach, it is proved theoretically that the simple proportional-differential (PD) output-feedback power-level control can provide globally asymptotic closed-loop stability. Numerical simulation results verify the theoretical results and show the influence of the controller parameters to the dynamic response.
文摘基于注塑机料筒温度控制器算法性能测试中调试时间长、成本高、安全性差等问题,提出采用硬件在环(HIL)半实物仿真技术进行注塑机料筒温度控制算法性能测试,并基于NI Single-Board RIO 9623控制器设计注塑机料筒温度半实物仿真系统。通过分析系统结构,解决了系统搭建中涉及到的关键技术点。最后搭建该仿真系统并进行简单仿真测试,验证该系统设计方案是可行的。料筒温度半实物仿真系统通过Lab VIEW编程,编程快速、简单,运行效率高,人机交互更加方便,测试性能更加优越。
