Parameter Design Automation for a Focusing Control System on a CD-ROM Player

Μέγεθος: px

Εμφάνιση ξεκινά από τη σελίδα:

Download "Parameter Design Automation for a Focusing Control System on a CD-ROM Player"

Ευγένεια Στεφανόπουλος
5 χρόνια πριν
Προβολές:

1 47 Joural of Sciece ad Egieerig Techology, Vol. 1, No., pp (005) 11 Matlab DSP Parameter Desig Automatio for a Focusig Cotrol System o a CD-OM Player YIH-FANG CHANG ad WEY-LIAN CHEN Departmet of Mechaical ad Automatio Egieerig, Da-Yeh Uiversity 11 Sha-Jiau d., Da-Tsue, Chaghua, Taiwa ABSTACT A automatic parameter desig process is developed for a lead-compesator i a focusig cotrol system o a commercial optical disk drive. I the frequecy domai the automatic desig process of focusig a pick-up head cotroller ca apply a set of cotrol parameters to the lead compesator, desiged by Matlab software to provide a coveiet ad fast operatio. After the actual system parameters are idetified by a auxiliary experimet, the appropriate cotrol parameters ca be obtaied ad the hex code for the digital sigal processor (DSP) o the player geerated by the proposed automatic desig program. The practical performace of the cotrol system ca be improved via the desig process. Key Words: lead compesator, focusig cotrol system, CD-OM

2 48 lead compesator Matlab opto-mechaical actuator digital sigal processor, couplig DSP ucertaity 1. Chait [10] QFT quatitative feedback theory template 1 [,4] performace boud stability time costat boud loop τ e = L shapig template U(s) idetificatio error X(s) [5] KV X ( s) K f = U ( s) M + B L M c KV f. Steibuch [14] s + ( + ) s + 1 K f K f K f µ-sythesis KV = 1 KV Ms + ( B f + ) s + K f Disc L Objective Les adial Directio i Sled Focusig Directio U Vm 1. [,4]

3 49 f = K i K v v K f M L M c B f M M L M C 1 X U K m = s + ξω s + ω ξ dampig ratioω atural frequecy K m (a) E = (V A +V B )-(V C +V D ) = 0 astigmatism [1] 3. [1] CD AB (b) E = (V A +V B )-(V C +V D ) < 0 0V E=0 (c) E = (V A +V B )-(V C +V D ) > 0 3(a) [1] E=V A +V B -V C +V D = [1] 3(c) AB E>0 CD E<0 E=V A +V B -V C +V D > 0 5 3(b) E = V A +V B -V C +V D < E Y r CD

4 50 E = Y r 6 + Y lead-lag compesator 5. 4 ( k + k ) k1 + kz k4 + k5z C H ( z) = 7 8z 7 k3z k6z ( k + k ) k9 + k10z C M ( z) = 1 13z 8 k11z ( k + k ) k14 + k15z C L ( z) = 17 18z 9 k16z k 1 k 8 C H (z) k 9 k 13 C M (z) k 14 k 18 C l (z) 4 K c k 1 k K c 3 sie wave HP35670 A/D FEI FOSO D/A C M (z) C L (z) gai phase [13] system idetificatio C M (z) C L (z) C H 5 G c (z) 4 G c (z) 1 FEI C (z) H 88.KHz C (z) M = 44.1KHz C (z) L =.05KHz FOSO K c CD_OM G c (z) r(s) _ FEO FEI A/D G (z) c U (s) =FOSO D/A -K m s + ξ ω s + ω + + d 5 d [3, 6, 7, 9] FOSO FEO 6 [8, 15] source CH1 CH 7 X(s)

5 51 sweep sie spa:10hz - 10kHz source _ + Vref Vref _ + FEI DSP (MT1198AE) FOSO FOSO BA5918FP FOCUS Actuator optical sesor HP35670 source CH1 CH kw k s s + y ws+ s y w source FOSO FEO FEO FEO (MT1136AE) 6. [13] 7. curve fittig dB G c (z) 1 ξ platk m ω 396rad/s k=93.85

6 5 G c (s) X ( s) U ( s) k = m 10 s + ξω s + ω = s kω = + ξω s + ω s + ( ) s d ω G ope( s) = 11 s + ξωs + ω d E=0 d. % O sd Tpd r+d d l(% Osd /100) ξ d = 1 r+d d π + l (% Osd /100) ξ d ΦMd = ta 13 4 ξ d ξ d Bode plot 9 KHz %O sd %O sd0 d= r+d U (s) ω G c(s) + _ s + ξ ω s + ω X(s) ΦM phase margi overshoot gai crossover frequecy [11-13] G c (s)=1 E X ξ d ΦMd %O sd maxgcs %Osd=%Osd-1 1. G opes 6. G cs Gs Tfs. %O sd %O sd0 T pd (1) d Md () bw 7. %O s %O s>%o sd0? yes 3. G ope (s) 1 Mi i o 8. G cs 4. 0log(1/ ) db max 9. ξ = 0.151, ω = 396rad / s 10.

7 53 ξ ω 4 bw = d d d d d ω ω (1 ξ ) + 4ξ 4ξ + 14 ω d π = 15 Tdp ξd bw %O s %O s %O sd0 %O s %O sd0 %O s %O s > %O sd0 %O sd0 %O s %O sd0 8. %O s %O sd0 Tusti S-domai Z-domai ) G c (s G ope (s) ΦMi ωi performace β siφ β = siφ max max z z z z z 0 φ max = ΦMd Φ Mi z 4. C M ( z) = ( 1+ z ) 1 0z 1 0log( ) db ωmax β 0.813z 0.480z C L ( z) = ( z ) 0.867z 1 s G c (s) = T β s + 1 βt [%O S =1 K c =3ξ 1 T = 18 ω β max 6. G c (s) G(s) T f (s) 1 s + ωh ω X β s + ωl s + ξω ( ) s + ω T f s = = 19 1 s + ω 1 h ω + β s + ω l s + ξωs + ω 7. % O s T f Matlab z C H ( z) = z % O s C H (z) C H (z) = = ( ) ω 396( rad / s) ] 11 1 K c =3, k1 ~ k ~ -1 Tusti C H (s) Z-domai

8 k 1 =5C0 16 / k =A / k 3 =38C6 16 / C0 16 A C6 16 Mtkflash 3.64KHz mm 5000 rpm 14 G c (s)g(s)

9 55 T T > 1) Ch 1: 500 mvolt 1 ms 1 ) ef A: 500 mvolt 1 ms Matlab S/N

10 56 implemetatio of a QFT cotroller for a compact disc player. Proceedigs of the America Cotrol Coferece, Baltimore, Marylad Choi, I. M., S. H. Kim ad Y. K. Kwak (1999) Desig ad. 78 cotrol of trackig actuator for optical disk. Proceedigs of 18-6 the 1999 IEEE/SJ Iteratioal Coferece o Itelliget obots ad Systems, Kyogju, Korea. 1. Haselma, D. C. ad B. C. Kuo (1995) MATLAB Tools for Cotrol System Aalysis ad Desig, Pretice Hall, New Jersey, NJ Nise, N. S. (000) Cotrol Systems Egieerig, Joh Wiley & Sos, New York, NY. 14. Steibuch, M., G. Schootstra ad O. H. Bosgra (199) obust cotrol of a compact disc player. Proceedigs of 7-31 the 31st IEEE Coferece o Decisio ad Cotrol, Tucso, Arizoa. 15. Yeh, T. J. ad Y. C. Pa (000) Modelig ad idetificatio of opto-mechaical couplig ad backlash oliearity i optical disk drives. IEEE Trasactios o Cosumer Electroics, 46(1), (1) Chait, Y., M. S. Park ad M. Steibuch (1994) Desig ad

Σχετικά έγγραφα

Rapid Acquisitio n of Doppler Shift in Satellite Co mmunicatio ns

Rapid Acquisitio n of Doppler Shift in Satellite Co mmunicatio ns 7 3 7 ATA ELETRONIA SINIA Vol. 31 No. 7 July 3 1, 1, (1., 184 ;., 444) :., PN,.,,. : ; ; ; : TN9 : A : 3711 (3) 7155 Rapid Acquisitio of Doppler Shift i Satellite o mmuicatio s HUAN Zhe 1,LU Jiahua 1,YAN