机械工程学报
機械工程學報
궤계공정학보
CHINESE JOURNAL OF MECHANICAL ENGINEERING
2014年
22期
150-164
,共15页
陈海军%赵治国%王琪%郑争兴
陳海軍%趙治國%王琪%鄭爭興
진해군%조치국%왕기%정쟁흥
6速干式双离合器自动变速器%联合起步%发动机改进恒转速控制%极小值原理%转矩最优协调控制%离合器位移
6速榦式雙離閤器自動變速器%聯閤起步%髮動機改進恆轉速控製%極小值原理%轉矩最優協調控製%離閤器位移
6속간식쌍리합기자동변속기%연합기보%발동궤개진항전속공제%겁소치원리%전구최우협조공제%리합기위이
six-speed dry dual clutch transmission(DCT)%launching with two clutches%improved constant engine speed control%minimum principle%torque optimal and coordinating control%clutch position
基于自主开发的6速干式双离合器自动变速器(Dual clutch transmission, DCT)，提出基于极小值原理的双离合器联合起步过程发动机和双离合器转矩协调最优控制算法。在起步滑摩阶段，以滑摩功和冲击度为性能指标，在反映驾驶员意图的终端约束下，采用极小值原理和改进的发动机恒转速控制，研究并确定起步过程中双离合器，发动机转矩及其转速。根据起步控制目标，确定分离离合器分离条件和离合器的转矩分配关系。在需求转矩切换阶段，将发动机输出转矩平滑切换到驾驶员需求转矩。在Matlab/Simulink软件平台上，搭建DCT车辆双离合器联合起步控制仿真模型，对不同驾驶意图和起步档位下DCT 车辆的起步过程进行仿真。结果表明，所提出的基于极小值原理的发动机和双离合器转矩协调控制策略，有效地保证双离合器联合起步品质，反映起步意图，延长离合器使用寿命。将所得的离合器最优转矩控制律转化为离合器位置控制律，在离合器伺服控制试验台架上进行离合器位置闭环控制，得到较好的跟踪效果。
基于自主開髮的6速榦式雙離閤器自動變速器(Dual clutch transmission, DCT)，提齣基于極小值原理的雙離閤器聯閤起步過程髮動機和雙離閤器轉矩協調最優控製算法。在起步滑摩階段，以滑摩功和遲擊度為性能指標，在反映駕駛員意圖的終耑約束下，採用極小值原理和改進的髮動機恆轉速控製，研究併確定起步過程中雙離閤器，髮動機轉矩及其轉速。根據起步控製目標，確定分離離閤器分離條件和離閤器的轉矩分配關繫。在需求轉矩切換階段，將髮動機輸齣轉矩平滑切換到駕駛員需求轉矩。在Matlab/Simulink軟件平檯上，搭建DCT車輛雙離閤器聯閤起步控製倣真模型，對不同駕駛意圖和起步檔位下DCT 車輛的起步過程進行倣真。結果錶明，所提齣的基于極小值原理的髮動機和雙離閤器轉矩協調控製策略，有效地保證雙離閤器聯閤起步品質，反映起步意圖，延長離閤器使用壽命。將所得的離閤器最優轉矩控製律轉化為離閤器位置控製律，在離閤器伺服控製試驗檯架上進行離閤器位置閉環控製，得到較好的跟蹤效果。
기우자주개발적6속간식쌍리합기자동변속기(Dual clutch transmission, DCT)，제출기우겁소치원리적쌍리합기연합기보과정발동궤화쌍리합기전구협조최우공제산법。재기보활마계단，이활마공화충격도위성능지표，재반영가사원의도적종단약속하，채용겁소치원리화개진적발동궤항전속공제，연구병학정기보과정중쌍리합기，발동궤전구급기전속。근거기보공제목표，학정분리리합기분리조건화리합기적전구분배관계。재수구전구절환계단，장발동궤수출전구평활절환도가사원수구전구。재Matlab/Simulink연건평태상，탑건DCT차량쌍리합기연합기보공제방진모형，대불동가사의도화기보당위하DCT 차량적기보과정진행방진。결과표명，소제출적기우겁소치원리적발동궤화쌍리합기전구협조공제책략，유효지보증쌍리합기연합기보품질，반영기보의도，연장리합기사용수명。장소득적리합기최우전구공제률전화위리합기위치공제률，재리합기사복공제시험태가상진행리합기위치폐배공제，득도교호적근종효과。
For the self-developed five-speed dry dual clutch transmission(DCT), the coordinating and optimal control is proposed based on minimum principle to solve the problems of launching with two clutches. In the slipping phase, minimum principle and improved engine constant speed control are adopted to obtain the optimal clutch and engine torque and their rotating speed with the minimum jerk intensity and friction work as optimization indexes. Besides, the separation conditions of non-target gear clutch and the clutches’ torque distributing relations are determined by the launching control targets. In the torque switching phase, engine torque is converted to the driver’s demand level. Besides, the launching control strategies are simulated under the different launching conditions on the Matlab/Simulink. Simulation results validate that the proposed control strategies based on the minimum principle can effectively obtain an excellent launching quality, reflect the driver’s launching intention and extend the life span of twin clutches. The clutch optimal principles are then transformed into clutch position principles and the closed-loop control of clutch position is verified in test platform of clutch actuator as a result of achieving a preferable tracking performance.
