Singular perturbation control for flexible2joint man ipulator
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1 EL ECTR ICMACH IN ESANDCON TROL Vol3 No3 May 29,,, 2 (., 5; 2.,8223) :,,,,,,, PD, : ; ; ; : TP24 : A : 7-449X (29) Singular perurbaion conrol for flexible2join man ipulaor L IU Ye2chao, L IU Yi2wei, L IU Hong, 2 (. Sae Key Laboraory of Roboics and Sysem, Harbin Insiue of Technology, Harbin, 5, China; 2. Insiue of Roboics and Mecharonics, German Aerospace Cener, Munich 8223, Germany) Absrac: The radiional singular perurbaion app roach can only be used in he robo sysem w ih weak join flexibiliy. In order o solve his p roblem, a join flexibiliy compensaor was designed, which can increase he equivalen join siffness. So he lim iaion for he singular perurbaion app roach was re2 moved and i can be exended o he robo sysem w ih norm al join flexibiliy. Besides hese, an adap ive conrol law was designed for he slow subsysem, which can guaranee he rajecory error asymp oical racking. The p roposed conrol sraegy can be app lied o he engineering sysem s convenienly w ihou any join flexibiliy lim iaion and does no need he link acceleraion or jerk informaion. Finally, an ex2 perim enal sudy on he flexible join manipulaor was execued and he resuls verify ha whaever he PD, compued orque or adap ive conrol are used in he slow subsysem, he p roposed singular perurba2 ion sraegy is more valid han he radiional one. Key words: flexibiliy compensaion; adap ive conrol; singular perurbaion conrol; flexible join, : : ; (26AA4z228) : (98 - ),,, ; (977 - ),,, ;, [ ] [ 2 ] [ 3 ] [ 4 ] (966 - ),,,,
2 3 437, [, 5, 6 ] [ 7, 8 ] :Spong [ ] ; Ge [ 5 ], [ 5, 6, 9, ],,, Huang [ ], : ;,,,,,;,, 2 Spong [ 2 ], m = J+, () =M ( q) q + C ( q, gq) gq + G ( q), (2) = K (- q) (3) : q ; J ; K; m ; ; C G,,,,,,,, ( ),,,,,, () (3) J K - += - J q (4) (4), u e m = m - J q (5) K -, u e,,, m = K a u a + u f, (6) : u a ; u f ; K a, (6)(4), J K - += K a ( u a - K - J q) + u f (7) a u l = u a - K - a J q, (8) u f = - K p, (9) K p (7), J K - + ( I + K p )= K a u l () ( ) ( 4 ) K a = I + K p, () J K - += u = u a - K - J q, (2) e a K e = K a K (3) (4) (2),,,, u a,,, u a = u as + u af, (4) u af u as
3 438 3,, K e = K e / 2 u af 2 J = - K ev g= -K e2 g +K e K e2 g+ K e = K e ( u as - K - a J q), (5) = M e ( q) q + C ( q, gq) gq + G ( q) = u as, (6) M e ( q) =M ( q) + K - a J ( 6 ), :, ge ( ), e ( ), e = q d - q Barbala, y ( ) M ( ), y T ( lim y ( ) = )M ( ) y ( ) d<, (7) y = ge +e, = g gq d +e (8) (6) y T (M e ) yd = y T [M e ( q +y) +C gq +G - u as ]d = - 2 yt M e y C+ g G - u as ]d = + 2 y () T M e () y () - y T [M e ( +y) + 2 yt M e y + y T (W x - u as ) d, (9) W x =M e ( +y) + C+ g G, (2) W y egeg, x y T M e gyd = 2 yt M e y y T 2 Mg e ( q) - C ( q, gq) - 2 y T g y = M e yd, x^ =W T y, (23) ( 24), y T (W x - u as ) d = y T [W ( x - ^x) - K d y ]d = y T W x - [ x - ^x () ] W T yd- ^x () ( y T W ) d - y T W d 2 - K d y d 4 - [ x - ^x () ] 2 < (24), 2,: ),,,, [ 2 ] ; 2),(23) x^+ P ^x =W T y, P (9), y T ( ) y ( ) <, y T (W x - u as ) d <, (2) lim y ( ) =,, u as =W ^x + K d y, (22)
4 , 3 F ig. 3 3The robo prooype 4,,,DSP FPGA : FPGA, DSP, DSPFPGA ( PPSeCo), 5kHz,, 4 4 Fig. 4The hardware archiecure for he arm s conroller 32, 2,9, Paul [ 3 ],, [ 4 ] 4,L 2 [ e ] e M L 2 [ u ]C u I l q +m glcosq =, J += m, = K (- q) (25) : I l ; J ; m ; l ( I l + J ) q +m glcosq = m s, (26) J I l + q +m glcosq = u + as (27) K p mt =- K v g, (28) m s mn = ( + K p ) ( u as - K ev g ) - K p (29) 32. PD,PD m s = u as = K p e + K d ge, e = q d - q (3), K d =, K p, 2, 3, 4, 8, L 2 [ e ] e M K p, C u,, C u 2 (K p = 8 ),, K p = 4, K d,k p ( K p = 4 ), K d 2K d ,,, L 2 [ u ] ;
5 44 3,, K d,,k p = 4, K d = 4, PD PD,, ( )( ),,, m s = u as =M^ e ( q) ( q d + K p e + K d ge) + g ( q), (3) F ig. 6 6The error plos w ih wo schem es ba sed on com pue orque con rol 323 e = q d - q, y = ge +e, = g gq d +e, ( 24) W x =M e ( +y) +m g lcosq, (32) W = +y cosq T = q d +ge +y cosq T, (33) x x T = I l + J m gl x N = I J l + + K p, (34) (35) m gl, (26) m s = u as =W ^x + K d y, (36) x^ = ( +y) y, x^ 2 = 2 ycosq (37) PD,, =, =, = 5, 2 = 2, K d = 5 7 M^ e ( q), (3) (3), 6 F ig. 7 7The error plos ba sed on adapive con rol
6 3 44, PD,, 3, CT, AC 3,,, PD,;,,,,, 3 Table 3 The con rol performance indexes w ih d ifferen schem es and d ifferen con rol laws 4,,,,,,,, [ 2 ] SPONGM W. Modeling and conrol of elasic join robos[ J ]. Jour2 nal of Dynam ics Sysem s, M easurem en, and Conrol, 987, 9: [ 3 ] YAUN J, STEPANENKO Y. Composie adap ive conrol of flexible join robos[ J ]. Auom aica, 993, 29 (3) : [ 4 ] LOZANO R, BROGL IATO B. Adap ive conrol of robo manipula2 ors wih flexible joins. 992, 37 (2) : IEEE Transacions on Auom aic Conrol, [ 5 ] GE S S. Adap ive conroller design for flexible join manipulaors. Auom aica, 996, 32 (2) : [ 6 ] GHORBEL F, HUNG J Y, SPONG M W. Adap ive conrol of flexible2join manipulaors[ J ]. 989, 9 (7) : 9-3. IEEE Conrol Sysem s M agazine, [ 7 ] CHEONG J, LEE S. L inear P ID composie conroller and is un2 ing for flexible link robos[ J ]. 28, 4 (3) : Journal of V ibraion and Conrol, [ 8 ] GE S S, TEE K P, VAHH I I E, e al. Tracking and vibraion conrol of flexible robos using shape memory alloys[ J ]. IEEE / ASM E Transacions on M echaronics, 26, (6) : [ 9 ] KHORASAN I K. Robus adap ive sabilizaion of flexible join ma2 nipulaors[ C ] / / Proceedings of 989 IEEE Inernaional Confer2 ence on Roboics and Auom aion, May 4-9, 989, Scosdale, USA, 989, 2: [ ] AL2ASHOOR R A, PATEL R V, KHORASAN I K. Robus adap2 ive conroller design and sabiliy analysis for flexible - join ma2 nipulaors[ J ]. IEEE Transacions on Sysem s, M an, and Cyber2 neics, 993, 23 (2) : [ ] HUANG L, GE S S, LEE T H. Posiion /force conrol of uncer2 ain consrained flexible join robos[ J ]. M echaronics, 26, 6 (2) : - 2. [ 2 ] KELLY R, ORTEGA R, A ILON A, e al. Global regulaion of flexible join robos using app roximae differeniaion [ J ]. IEEE Transacions on Auom aic Conrol, 994, 39 (6) : [ 3 ] P. :[M ].,,. :, 99: [ 4 ] YAO B, AL2MAJED M, TOM IZUKA M. H igh performance ro2 bus moion conrol of machine ools: an adap ive robus conrol approach and compara2ive experimens[ J ]. acions on M echaronics, 997, 2 (2) : IEEE /ASM E Trans2 ( :) : [ ] SPONG M W, KHORASAN I K, KOKOTOV IC P V. An inegral manifold approach o he feedback conrol of flexible join robos [ J ]. IEEE Journal of Roboics and A uom aion, 987, 3 ( 4 ) : 29-3.
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