·678· 北京科技大学学报 2002年第6期 东北大学学报（自然科学版），1999(2)：148(150 eling salesman problem model for hot rolling scheduling 7 TANG L X,LIU J Y,RONG A Y,et al.A review of plan- in Shanghai Baoshan Iron Steel Complex [J].European ning and scheduling systems and methods for integrated Journal of operational research,2000(124):267 steel production [J].European Journal of Operational Re- 9陈国良，王煦法，庄镇泉，等，遗传算法及其应用M. search,2001(133):1 北京：人民邮电出版社，1996 8 TANG L X,LIU J Y,RONG Aiying,et al.A multiple trav- Optimization Method for Hot Charge Rolling Manufacture Plan LU Zhimin XUJinwu National Engineering Research Center for Advanced Rolling.UST Beijing,Beijing 100083 ABSTRACT An optimization method based on genetic algorithms is introduced for HCR(hot charge rolling) manufacture plan.Different from the optimization method based on MTSP,it need not determinate the number of rolling cycles.The makeup characteristic of rolling cycles is applied in this method,and the number of rol- ling cycles is optimized during the makeup optimization.Simulation results show that this method can find out the feasible HCR manufacture plans quickly. KEY WORDS HCR;manufacture plan;optimization method;genetic algorithms (上接第674页) Manufacture of Self-cascade Induction Machine Drives XIE Lun",SUN Yikang",WANG Zhiliang",LU Yifang",DU Cang,SHENG Xiangyuan? 1)Information Engineering School,UST Beijing,Beijing 100083,China 2)New Metallurgical Electric Corporation,Beijing 100071,China ABSTRACT The mathematical model and control system structures of self-cascade induction machine drives is proposed,which is firstly developed in the world successfully.According to experimental results,the system dynamic static performance is analyzed which is the same as DC drives. KEY WORDS self-cascade induction machine drive;mathematical model;vector control system;dynamic and static performance一 北 京 科 技 大 学 学 报 年 第 期 东北大学学报 自然科学版 ， ， 丫 ， ， ， ， ， ， 陈国 良 ， 王煦法 ， 庄镇泉 ， 等 遗传算法及其应用 』 北京 人 民 邮 电出版社 ， 俪 刀乞 双了沂刀 ， ， ， 们 ， 叩 上接第 页 ‘心万 ， ， 〔刀 儿 刀， 恻刀召 ’ 子啥 人 ， 丫 ， 汉习 脚 儿 夕 ， ， ， 】 ， ， ， 而 ， 面