一种基于改进双通道继电测试的闭环辨识方法研究-控制与决策.PDF

第17 卷第4 期 2002 年7 月 Vol. 17 No . 4 Contr ol and D ecision 　July 2002 : 1001-0920( 2002) 04-04 11-04 王学雷, 邵惠鹤 ( , 200030) : 基于双通道继电反馈测试及其改进方案, 提出一种提取SISO 系统频 信息的闭环辨识测试方 法。该方法具有许多有意义的特性, 能在很大程度上克服现有辨识测试方法的问题与不足。在充分获取 系统频 信息的基础上, 引入频 辨识算法得到系统的低阶传递函数模型。对两 个典型过程的仿真取得 了良好的效果, 表明了所提出方法的有效性。 : 继电反馈; 双通道继电特性; 频 辨识; 传递函数模型 : TP 17: A - Closed loop identification method based on - improved two channel relay feedback WA N G X ue-lei, SH A O H ui-he ( Inst itut of Automation, Shanghai Jiaotong Univ rsity, Shanghai 200030, China) Abstract: Bas d on th tw o-chann l r lay f dback and its improv d v rsion, a nov l clos d-loop - id ntification t st m thod T RFT to ffici nt ly xt ract multi point fr qu ncy charact ristics of SISO sy st ms is pr s nt d. This m thod can ov rcom som s rious short comings w ith ot h r x isting t st m t hods. Furth rmor , on th basis of obtain d multi-point fr qu ncy charact rist ics through T RFT , a - . fr qu ncy domain id nt ification algorithm is us d to st imat th transf r funct ion mod l T h simulations on t wo typical proc ss s show xc ll nt r sult s and v rify th validity of th id ntification m t hod. Key words: r lay f dback; tw o-chann l r lay ; fr qu ncy domain id ntification; transf r funct ion mod l 1 引　　言 , : , 1) , [ 1]