·484· 北京科技大学学报 2001年第5期 Stabilization of Chaos by Self-adaptive PSD State-delayed Feedback Algorithm Based on Single Neuron LI Qing",ZHENG Deling",YANG Linhao2,LU Yifang" 1)Information Engineering School,UST Beijing,Beijing 100083,China 2)Handan Iron and steel Corporation,Handan 056000,China ABSTRACT In order to stabilize the unstable orbits of chaotic systems,a new intelligent control method, which is combined the state-delayed feedback PID algorithm with the adaptive PSD algorithm based on single neuron,is presented.When this method is used for the stabilization of chaos,the parameters of the control sys- tem is governed adaptively by way of the self-learning function of the neuron.The simulation results demon- strate that this method has many strongpoints for its wide range of application,short transition time of stabili- zation and strong anti-inference ability. KEY WORDS chaos;stabilization;self-adaptive;neuron 6a童e空理ee6a亚aa6坐ese6e6a里6as2asa6望a5ea0ste堂理理e空e (上接438页) Compound Artificial Synovia in Orthogonal Test YU Luqing",LI Jiuqing",GU Zhengqiu,ZHANG Ber 1)Applied Science School,UST Beijing.Beijing 100083,China 2)Material Science and Engineering School,UST Beijing,Beijing 100083.China ABSTRACT The compound artificial synovia was prepared according to the table of orthogonal test design, which three factors-Hyaluronic Acid,y-globulin and La-DPPC and five levels were considered.A pendulum type friction test made by author was used to determine the friction coefficient of two kinds of tribology slide pairs-PVA-H/PVA-H and PVA-H/316L SS lubricated by the compound artificial synovia,the appropriate properties of three factors in the compound artificial synovia selected were ascertained finally. KEY WORDS hyaluronic acid;compound artificial synovia;orthogonal test. 48 4 . 北 京 科 技 大 学 学 报 2 00 1 年 第 5 期 S t a b i l七a ti o n o f C h a o s b y S e l f￾a d a P t iv e P S D S t a t e 一 d e l a y e d F e e d b a c k A l g o r it h m B a s e d o n S i n g l e N e u r o n LI Q ing ,) Z付五 N G D le ign l) , YA N G L ’ln ha o)z, L U 圣加 gn , l ) I n fo mr at i o n E n g in e e inr g S e h o o l , U S T B e ij i n g , B e ij i n g 10 0 0 8 3 , C h ian Z )H an d an I r o n an d s te e l C o rp o 哎i o n , H an d an 0 5 6 0 0() , C h in a A B S T R A C T I n o r d e r t o s at b ili z e ht e un st a b l e o rb it s o f e h a o t i e s y s t em s , a n e w in t e ll i g e nt e o ntr o l m e ht o d , w h i e h 1 5 e o m b i n e d ht e s at t e 一 d e l a y e d fe e d b a ck IP D a lg ior t hj rn w iht ht e a d ap ti v e P S D a l g o r iht m b a s e d o n s i n g l e n e uor n , 1 5 Per s en t e d . Wh e n ht i s m het o d 1 5 us e d fo r ht e s t ab ili atZ i o n o f e h ao s , ht e Pa r aj rn et e r s o f ht e c o n tr o l sy s - t e m 1 5 g o v e m e d a d a Pit v e l y by w ay o f t h e s e l-f l e am i n g ft l n e t i o n o f ht e n e ur o n . Th e s im ul at i o n er s u lt s d e m o n - s tr at e ht a t ht i s m e ht o d h a s m an y str o n gP o int s fo r it s w id e arn g e o f aP Pli e at i o n , s h o rt tr an s it i o n t加e o f s abt ili - z at i o n an d s tr o gn a n t i 一 i n fe r e n e e a b iliyt . K E Y WO R D S e h a o s : st ab i li atZ i o n ; s e l卜a da tP i v e ; n e ur o n (上 接 4 3 8 页) C o m P 0 u n d A r t i if e i a l S y n o v i a i n o r t h o g o n a l eT s t YU L u 叮i馆 ` , , L I iJ u q i心 , , G U hZ e ” g 甘i u , ), IZ 侧刀 G B e尸, l ) A P Pli e d S e i e n e e S e h o l , U S T B e ij i n g , B e ij in g 10 0 0 8 3 , C h i n a Z ) M at e r i a l s e i e n e e an d E n g i n e e ir 呢 S e ho l , U S T B e ij in g , B e IJ m g 10X() 8 3 . C h in a A B S T R A C T T h e e o m Po un d art iif e i a l s y n o v i a aw s Pre P are d a e c o dr i n g ot ht e atb l e o f o hrt og o anl te st d e s ign , w hi e h t hr e e fa e ot r s一 H y a l uor n i e A e id , y 一 g l o b u li n an d L a 一 D P P C an d if v e l e v e l s w e r e e o sn ide r e d . A P e n d u l nUI 妙p e 伍e t i o n t e s t m a d e 勿 a u ht o r w a s u s e d t o d e t e mr in e ht e if e t i o n e o e if e i e nt o f wt o ik n d s o f itr b o l o gy s lid e P a i r s一PVA 一 H P/ VA 一 H an d p VA 一 H 3/ 1 6 L 5 5 l u b ir e at e d b y ht e e o 哪 o un d art iif e i a l s y n o v i a , ht e a p p r o p n aet P r o P ert i e s o f htr e e fa e t or s i n ht e e o In Po un d art iif e i al s y n o v i a s e l e e t e d w e r e a s e e rt a in e d if n a 1ly . K E Y W O R D S hy a lur o in e a c id: e o m P o u n d art iif e i a l s y n o v i a ; o hrt o g on a l t e s t