The large warping deformation at platform of turbine blade directly affects the forming precision. In the present research, equivalent warping deformation was firstly presented to describe the extent of deformation at...The large warping deformation at platform of turbine blade directly affects the forming precision. In the present research, equivalent warping deformation was firstly presented to describe the extent of deformation at platform. To optimize the process parameters during investment casting to minimize the warping deformation of the platform, based on simulation with Pro CAST, the single factor method, orthogonal test, neural network and genetic algorithm were subsequently used to analyze the influence of pouring temperature, shell mold preheating temperature, furnace temperature and withdrawal velocity on dimensional accuracy of the platform of superalloyDD6 turbine blade. The accuracy of investment casting simulation was verified by measurement of platform at blade casting. The simulation results with the optimal process parameters illustrate that the equivalent warping deformation was dramatically reduced by 21.8% from 0.232295 mm to 0.181698 mm.展开更多
为解决纯电动车控制策略开发周期长、可靠性及稳定性差等问题,基于D2P(from Development to Production)开发平台,在Matlab/Simulink模型化开发环境下,设计了纯电动车核心控制策略。利用MotoHawk模块库建立产品级整车控制器(Vehicle Con...为解决纯电动车控制策略开发周期长、可靠性及稳定性差等问题,基于D2P(from Development to Production)开发平台,在Matlab/Simulink模型化开发环境下,设计了纯电动车核心控制策略。利用MotoHawk模块库建立产品级整车控制器(Vehicle Control Unit,VCU)与控制策略的联系,基于SAE_J1939标准设计了整车控制器局域网络(Controller Area Network,CAN),并通过编写Matlab脚本文件实现了其自动化的模型在环(Model in-the-loop,MIL)测试功能。采用LabVIEW软件构建了VCU控制策略测试平台,并进行了实车测试。结果表明:所搭建控制策略能够迅速响应驾驶员操作意图,有效保障整车的安全性、稳定性和可靠性;基于D2P开发平台的纯电动车整车控制策略研究有利于提高开发效率,缩短开发周期,节省研发成本。展开更多
基金financially supported by the National Natural Science Foundation of China(No.51371152)
文摘The large warping deformation at platform of turbine blade directly affects the forming precision. In the present research, equivalent warping deformation was firstly presented to describe the extent of deformation at platform. To optimize the process parameters during investment casting to minimize the warping deformation of the platform, based on simulation with Pro CAST, the single factor method, orthogonal test, neural network and genetic algorithm were subsequently used to analyze the influence of pouring temperature, shell mold preheating temperature, furnace temperature and withdrawal velocity on dimensional accuracy of the platform of superalloyDD6 turbine blade. The accuracy of investment casting simulation was verified by measurement of platform at blade casting. The simulation results with the optimal process parameters illustrate that the equivalent warping deformation was dramatically reduced by 21.8% from 0.232295 mm to 0.181698 mm.
文摘为解决纯电动车控制策略开发周期长、可靠性及稳定性差等问题,基于D2P(from Development to Production)开发平台,在Matlab/Simulink模型化开发环境下,设计了纯电动车核心控制策略。利用MotoHawk模块库建立产品级整车控制器(Vehicle Control Unit,VCU)与控制策略的联系,基于SAE_J1939标准设计了整车控制器局域网络(Controller Area Network,CAN),并通过编写Matlab脚本文件实现了其自动化的模型在环(Model in-the-loop,MIL)测试功能。采用LabVIEW软件构建了VCU控制策略测试平台,并进行了实车测试。结果表明:所搭建控制策略能够迅速响应驾驶员操作意图,有效保障整车的安全性、稳定性和可靠性;基于D2P开发平台的纯电动车整车控制策略研究有利于提高开发效率,缩短开发周期,节省研发成本。
