MÔ HÌNH HÓA VÀ NHẬN DẠNG HỆ THỐNG - hcmut.edu.vnhthoang/ndht/Chuong2_NDHT_Slide.pdf ·...
Transcript of MÔ HÌNH HÓA VÀ NHẬN DẠNG HỆ THỐNG - hcmut.edu.vnhthoang/ndht/Chuong2_NDHT_Slide.pdf ·...
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Mn hcMn hc
M HNH HA V NHN DNG H THNGM HNH HA V NHN DNG H THNG
Ging vin: TS. Hunh Thi HongB mn iu Khin T ng Khoa in in TB mn iu Khin T ng, Khoa in in T
i hc Bch Khoa TP.HCMEmail: [email protected],
hthoang hcmut@yahoo [email protected]: http://www4.hcmut.edu.vn/~hthoang/
31 August 2012 H. T. Hong - HBK TPHCM 1
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Chng 2Chng 2
M HNH HAM HNH HA
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D L S ith I t d ti t D i S t
Ti liu tham kho chng 2Ti liu tham kho chng 2
D. L. Smith, Introduction to Dynamic SystemsModeling for Design, Prentice-Hall, EnglewoodCliffs New Jersey 1994Cliffs, New Jersey, 1994.
31 August 2012 H. T. Hong - HBK TPHCM 3
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Gii thiu
Ni dung chng 2Ni dung chng 2
Gii thiu Phn tch chc nng Phn tch vt l Phn tch vt l Phn tch ton hc Mt s th d
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G G Gii thiuGii thiu
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M hnh haM hnh ha
M h h h l h h d h h t h M hnh ha l phng php xy dng m hnh ton ca hthng bng cch da vo cc qui lut vt l chi phi hotng ca h thng. g g
Phng php m hnh ha ch c th p dng khi ta bit r cu trc ca h thng v cc qui lut vt l chi phi hot ng ca h thngng ca h thng.
Cc nh lut vt l inin C hc Nhit Lu cht lng Lu cht kh
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
Ph t h h h t h h th th h khi Phn tch chc nng: phn tch h thng thnh cc khichc nng, trong m hnh ton ca cc khi chc nng bit hoc c th rt ra c da vo cc qui lut vt l. q
Phn tch vt l: rt ra m hnh ton ca cc khi chc nngda vo cc qui lut vt l.
Phn tch ton hc: cc khi chc nng c kt ni tonhc c m hnh ca h thng.
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
h hC lp h thng
Ph t h HT Quan h gia cc
phn t vt l m t h thng
T t h hPhn tch HT con
Q h h
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
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nh gi m hnh
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Phn tch chc nngPhn tch chc nng
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
h hC lp h thng
Ph t h HT Quan h gia cc
phn t vt l m t h thng
T t h hPhn tch HT con
Q h h
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
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nh gi m hnh
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Khi nimKhi nim
Ph t h h l h t h h th h h Phn tch chc nng l phn tch h thng cn m hnh ha thnh nhiu h thng con, mi h thng con gm nhiu b phn chc nng (functional component). p g ( p )
Khi phn tch chc nng cn : lin kt vt l (connectivity): cc b phn no ca h
h k i i h ?thng kt ni vi nhau? quan h nhn qu (causality) cc b phn lin kt vi
nhau nh th no?nhau nh th no? Ba bc phn tch chc nng:
C lp h thngp g Phn tch h thng con Xc nh cc quan h nhn qu
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
h hC lp h thng
Ph t h HT Quan h gia cc
phn t vt l m t h thng
T t h hPhn tch HT con
Q h h
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
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nh gi m hnh
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C lp h thng C lp h thng Xc nh cc lin kt ngoiXc nh cc lin kt ngoi
X h ii h h th h h h Xc nh gii hn ca h thng cn m hnh ha Ct kt ni gia h thng kho st vi mi trng ngoi Mi kt i b t th th b t t Mi kt ni b ct c thay th bng mt cng m t s
tng tc gia h thng v mi trng.
bien cua he thong
He thong Moi trngU
He thong Moi trngY
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CngCng
C ( t) l t i (t i l) Cng (port) : l mt cp u cui (terminal) m qua nnglng truyn vo hoc ra khi h thng. Mt h thng c thc nhiu cng (multiport system).g ( p y )
Mi cng c th c mt hoc hai ng vo (k hiu l U) vmt hoc hai ng ra (k hiu l Y)
Bn loi cng thng gp: C kh (Structural) in (Electrical) Nhit (Thermal)
L ht (Fl id) Lu cht (Fluid)
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Cng c khCng c kh
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Cng inCng in
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Cng nhitCng nhit
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Cng lu chtCng lu cht
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Th d: C lp h tay myTh d: C lp h tay my
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Th d: C lp h tay my (tt)Th d: C lp h tay my (tt)
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Th d: C lp h thng lm mtTh d: C lp h thng lm mt
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Th d: C lp h thng lm mt (tt)Th d: C lp h thng lm mt (tt)
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TD: C lp b phn trao i nhit trong h thng lm mtTD: C lp b phn trao i nhit trong h thng lm mt
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TD: C lp b phn trao i nhit trong h thng lm mt (tt)TD: C lp b phn trao i nhit trong h thng lm mt (tt)
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Th d: c lp h thng gim xc Th d: c lp h thng gim xc
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Th d: c lp h thng cch nhit Th d: c lp h thng cch nhit
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Th d: c lp h thng cch nhit Th d: c lp h thng cch nhit
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
h hC lp h thng
Ph t h HT Quan h gia cc
phn t vt l m t h thng
T t h hPhn tch HT con
Q h h
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
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nh gi m hnh
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Phn tch h thng con Phn tch h thng con Xc nh cc lin kt trongXc nh cc lin kt trong
Phn tch h thng sau khi c lp thnh cc h thng con(subsystem), sau tip tc phn tch cc h thng con chitit n cc b phn (component) thay th lin kt gia cctit n cc b phn (component), thay th lin kt gia ccb phn bng cc cng.
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Th d: M hnh ho h tay myTh d: M hnh ho h tay my
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Th d: M hnh ho h tay my (tt)Th d: M hnh ho h tay my (tt)
C
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Cc lin kt ngoi
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Th d: M hnh ho h tay my (tt)Th d: M hnh ho h tay my (tt)
Cc lin ktCc lin kt trong chi tit n cc h thng con (subsystem)( y )
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Th d: M hnh ho h tay my (tt)Th d: M hnh ho h tay my (tt)
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Cc lin kt trong chi tit n cc b phn (component)
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
C lp h thng
Q h i
phn t vt l m t h thng
Phn tch HT con
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
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nh gi m hnh
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Phn tch quan h nhn qu Phn tch quan h nhn qu Xc nh cc bin ca HTXc nh cc bin ca HT
V cng l u cui m qua cng sut (nng lng/n vthi gian) truyn vo ra h thng nn quan h nhn qu cacng c xc nh bi cc bin nh ngha cng sut ticng c xc nh bi cc bin nh ngha cng sut ticng.
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Cc bin ca cc loi cngCc bin ca cc loi cng
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Th d: M hnh ho h tay my (tt)Th d: M hnh ho h tay my (tt)
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S khi hon chnh h tay my
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Bi tp: Phn tch chc nng h thng thang myBi tp: Phn tch chc nng h thng thang my
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Bi tp: Phn tch chc nng h thng lu chtBi tp: Phn tch chc nng h thng lu cht
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Bi tp: Phn tch chc nng h thng tn laBi tp: Phn tch chc nng h thng tn la
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Phn tch vt lPhn tch vt l
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
h hC lp h thng
Ph t h HT Quan h gia cc
phn t vt l m t h thng
T t h hPhn tch HT con
Q h h
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
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nh gi m hnh
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Cc loi h thng vt lCc loi h thng vt l
H thng vt l c th chia thnh 4 loi: H thng vt l c th chia thnh 4 loi: in (Electrical) C (Machenical)( ) Nhit (Thermal) Lu cht (Fluid)
Mt h thng phc tp c th gm nhiu h thng con thuc 4 loi trn.
Cc phn t c bn (basis element): Cc phn t c bn (basis element): Tr (resistance) Dung (capacitance)Dung (capacitance) Cm (inductance) hay qun tnh (inertia)
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Cc bin c bnCc bin c bn
C bi b l ( tit ) th ( t ti l) thi i (ti )
Loi Bin
Cc bin c bn: lng (quantity), th (potential), thi gian (time)
Loi H thng Lng Th Thi gian
in tch in thin in tch(Charge)in th (Voltage) Giy
Khong cch LcC kh Khong cch(Distance)Lc
(Force) Giy
Lu cht Th tch p sut GiLu cht(lng)Th tch(Volume)
p sut(Pressure) Giy
Nhit Nhit nng Nhit Giy
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Nhit g(Heat energy)
(Temperature) Giy
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
h hC lp h thng
Ph t h HT Quan h gia cc
phn t vt l m t h thng
T t h hPhn tch HT con
Q h h
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
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nh gi m hnh
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Cc bin khc nh ngha da trn cc bin c bnCc bin khc nh ngha da trn cc bin c bn
C d l bi thi l t t thi Cng dng l bin thin lng trong mt n v thi gian (hay cng dng l tc bin thin lng).
d lngdong o cng dtd
d h Cng sut dongocngthesuatcong
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nh ngha phn t trnh ngha phn t tr
Tr l i lng c trng cho kh nng chng li s dch Tr l i lng c trng cho kh nng chng li s dch chuyn c hc hay dng vt cht, nng lng.
Tr c o bng th cn thit chuyn mt n v lngtrong mt n v thi gian (giy).
thedong o cng
thetr
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nh ngha phn t dungnh ngha phn t dung
Dung biu din mi quan h gia lng v th Dung biu din mi quan h gia lng v th. Dung c o bng lng cn thit l cho th bin thin
mt n v.
lngdungthe
gdung
dt dong o cngdungthe1
g
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nh ngha phn t cmnh ngha phn t cm
Cm hay qun tnh l i lng c trng cho kh nng Cm hay qun tnh l i lng c trng cho kh nng chng li s thay i trng thi chuyn ng c hc ca dng vt cht, nng lng.
Cm c o bng th cn thit lm tc bin thin ca lng thay i mt n v .
thecam d dong ocngdtd
dong o cngcamthedtd
31 August 2012 H. T. Hong - HBK TPHCM 49
dt
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
h hC lp h thng
Ph t h HT Quan h gia cc
phn t vt l m t h thng
T t h hPhn tch HT con
Q h h
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
31 August 2012 H. T. Hong - HBK TPHCM 50
nh gi m hnh
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Cc phng trnh cn bngCc phng trnh cn bng
Cc nh lut bo ton khi lng nng lng v xung Cc nh lut bo ton khi lng, nng lng, v xung lng l cc nh lut c bn c s dng khi m hnh ha.
Phng trnh cn bng c bn c dng tng qut nh sau:radongvaodongluytchdong
Phng trnh cn bng c bn c dng tng qut nh sau:
Nu h thng khng c cc phn t tch tr khi lng, nng lng v xung lng th phng trnh trn tr thnh:
d d 0 radongvaodong 0
Nu h thng c phn t tch tr khi lng, nng lng hay g p g, g g yxung lng th s tch tr ny lm thay i trng thi ca HT:
d d th itbi d
31 August 2012 H. T. Hong - HBK TPHCM 51
radongvaodongthaitrangbien dt
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Cc bc gii bi ton m hnh haCc bc gii bi ton m hnh ha
M hnh haM hnh ha
Phn tch chc nng Phn tch vt l Phn tch ton hc
C lp h thngL tng ha
Xy dng h PT
h hC lp h thng
Ph t h HT Quan h gia cc
phn t vt l m t h thng
T t h hPhn tch HT con
Q h h
Quan h gia cc i lng c bn
Tuyn tnh ha
Quan h nhn quCc .lut bo ton
i s s khi
31 August 2012 H. T. Hong - HBK TPHCM 52
nh gi m hnh
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L tng ha cc phn t vt lL tng ha cc phn t vt l
Ng n tc th n ha Nguyn tc thun ha Nguyn tc tp trung ha Nguyn tc l tng ha Nguyn tc l tng ha
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L tng ha cc phn t vt lL tng ha cc phn t vt l
N t th h h h h t l b hi Nguyn tc thun ha: nhn ra nh hng vt l c bn chi phi hot ng ca i tng v dng cc phn t thun biu dinbiu din.
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L tng ha cc phn t vt lL tng ha cc phn t vt l Nguyn tc tp trung ha: cc nh hng vt l thc lun Nguyn tc tp trung ha: cc nh hng vt l thc lun
phn b trong mt min hay khng gian nht nh (d nh). Cc nh hng phn b ny c th l tng ha bng cch
h h h t tm hnh ha tp trung
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L tng ha cc phn t vt lL tng ha cc phn t vt l
Ng n tc t n tnh ha tt c cc h thng th c l Nguyn tc tuyn tnh ha: tt c cc h thng thc u l h phi tuyn l tng ha bng cch tuyn tnh ha.
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S tng ng ca cc quan h vt lS tng ng ca cc quan h vt l
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S tng ng ca cc quan h vt lS tng ng ca cc quan h vt l
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Ch Ch
Gi h i h h i h t Gia h in v h c c hai cch tng ng Tng ng lc in p Tng ng lc cng dng in Tng ng lc cng dng in
Tng ng lc in p Tng ng lccng d.in
H c H in H c H in
Lc f in p u Lc f Dng in i
Khi lng M in cm L Khi lng M in dung C
H s ma st b in tr R H s ma st b 1/in tr, 1/R
cng l xo k 1/in dung, 1/C cng l xo k 1/in cm, 1/L
Dch chuyn x in lng q Dch chuyn x T thng
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Vn tc v Dng in i Vn tc v in p u
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Phn tch vt l h thng inPhn tch vt l h thng in
Cc bin c bn: Cc bin c bn: in lng: q [C] in th: u [V]
Cc phn t c bn:
[ ] Cng dng in:i [A]
Cc phn t c bn:
in tr:iuR S
lR i
in dung:uqC d
SC idtCu 1
thetr
u
lngd dt dongocngthe 1 in cm:
dtdiLu
d h d bNrL
2
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dong o cngtr
the gdung dt dongocngdungthedt dongocngcamthe dt
d b
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Phn tch vt l h thng inPhn tch vt l h thng in
C l i Cc loi ngun: Ngun p l tng Ngun dng l tng Ngun dng l tng
Phng trnh cn bng in nh lut Kirchoff v dng. ut c o d g nh lut Kirchoff v p.
Phng php gii tch mch in Phng php th nh Phng php dng vng
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Phn tch vt l h thng cPhn tch vt l h thng c
C bi b ( h th ) Cc bin c bn (chuyn ng thng): Khong cch (lng): x [m] Lc (th): f [N] Lc (th): f [N] Tc (cng dng): v [m/sec]
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Phn tch vt l h thng cPhn tch vt l h thng c
C h t b Cc phn t c bn Tr:
b: h s ma st nhtf: lc (th)
f
x: dch chuyn (lng)
vfbRM
thetr
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dong o cngtr
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Phn tch vt l h thng cPhn tch vt l h thng c
C h t b Cc phn t c bn Dung: k: cng l xo
f l (th)f: lc (th)x: dch chuyn
(lng)
fx
kCM
1(lng)
vdtCkxf M1
lngd dt dongocngthe 1M
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thelngdung dt dongocngdungthe
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Phn tch vt l h thng cPhn tch vt l h thng c
C h t b Cc phn t c bn Cm (qun tnh)
m: khi lngf: lc (th)
d h h (l )
dvmf
x: dch chuyn (lng)
dtmf
dongocngcamthe d
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dongocngcamthedt
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Ch th Ch Chuyn ng thng Chuyn ng quayLc MomentKhong cch Gc quayKhong cch Gc quayVn tc Vn tc gcGia tc Gia tc gcG a tc G a tc gcQun tnh Moment qun tnh
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Phng trnh cn bng cPhng trnh cn bng c
Ph t h b l h l t N t Phng trnh cn bng lc, nh lut Newton
Phng trnh Euler Lagrange:
qP
qL
qL
dtd
Phng trnh Euler Lagrange:
qqqdt
Trong : UTL U: th nngT: ng nngP: nng lng tiu haoq: ta tng qut: ngoi lc (hay moment)
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: ngoi lc (hay moment)
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S tng ng gia h thng in v h thng cS tng ng gia h thng in v h thng c
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S tng ng gia h thng in v h thng cS tng ng gia h thng in v h thng c
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Phn tch vt l h thng nhitPhn tch vt l h thng nhit
C bi b Cc bin c bn Nhit nng (lng): Q [J] Nhit (th): [0C] Nhit (th): [ C] Dng nhit: H [J/sec]
dtdQH
ld d
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lngdongocng dtd
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Phn tch vt l h thng nhitPhn tch vt l h thng nhit
C h t b Cc phn t c bn Nhit tr:
kC: h s dn nhitl: chiu di S: tit din ngang
SklRC
T
thetr
S: tit din ngang
RT
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dong o cngtrH
RT
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Phn tch vt l h thng nhitPhn tch vt l h thng nhit
C h t b Cc phn t c bn Nhit dung:
c: l nhit dung ring
QCT
c: l nhit dung ringM: l khi lng
McCT .
lngd
CT
dt dongocngthe 1 Hdt131 August 2012 H. T. Hong - HBK TPHCM 72
thelngdung dt dongocngdungthe HdtCT
-
Phn tch vt l h thng nhitPhn tch vt l h thng nhit
C h t b Cc phn t c bn Nhit cm (qun tnh nhit): IT
dtdHIT
dongocngcamthe d
31 August 2012 H. T. Hong - HBK TPHCM 73
dongocngcamthedt
-
Phng trnh cn bng nhitPhng trnh cn bng nhit
h l t b t l nh lut bo ton nng lng
31 August 2012 H. T. Hong - HBK TPHCM 74
-
Phn tch vt l h lu chtPhn tch vt l h lu cht
C bi b Cc bin c bn p sut (th): p [N/m2] Th tch (lng): V [m3] Th tch (lng): V [m3] Lu lng (cng dng): z [m3/sec]
dtdVz dt
ld d
31 August 2012 H. T. Hong - HBK TPHCM 75
lngdongocng dtd
-
Phn tch vt l h lu chtPhn tch vt l h lu cht
C h t b Cc phn t c bn Lu tr:
Lu tr ng ng:Lu tr ng ng:
: h s nht ca lu chtl: chiu di ng ng128 l l: chiu di ng ngd: ng knh ng ng(l > 20d)
4128
dlRL
thetrpRL
( )
31 August 2012 H. T. Hong - HBK TPHCM 76
dong o cngtrz
-
Phn tch vt l h lu chtPhn tch vt l h lu cht
C h t b Cc phn t c bn Lu tr:
Lu tr van: phi tuynLu tr van: phi tuyn
31 August 2012 H. T. Hong - HBK TPHCM 77
-
Phn tch vt l h lu chtPhn tch vt l h lu cht
C h t b Cc phn t c bn Lu dung:
A: tit din ngang: khi lng ring lu chtAC : khi lng ring lu chtg: gia tc trng trngg
CF
pVCL
lngd dt dongocngthe 1 zdtCp L
1
31 August 2012 H. T. Hong - HBK TPHCM 78
thelngdung dt dongocngdungthe
-
Phn tch vt l h lu chtPhn tch vt l h lu cht
C h t b Cc phn t c bnQun tnh: IL
la
dzdtdzIp L
tit di d
alIL
a: tit din ngang ng dnl: chiu di ng dn: khi lng ring lu cht
dongocngcamthe d
a : khi lng ring lu cht
31 August 2012 H. T. Hong - HBK TPHCM 79
dongocngcamthedt
-
Phng trnh cn bng h lu chtPhng trnh cn bng h lu cht
h l t b t khi l nh lut bo ton khi lng
31 August 2012 H. T. Hong - HBK TPHCM 80
-
Cc th d phn tch vt lCc th d phn tch vt l
H i h d bi i Hc vin t c cc th d trong bi ging
31 August 2012 H. T. Hong - HBK TPHCM 81
-
Phn tch ton hcPhn tch ton hc
31 August 2012 H. T. Hong - HBK TPHCM 82
-
Phn tch ton hcPhn tch ton hc
Kt h tt h h t h t t h Kt hp tt c cc h phng trnh m t c tnh ng ca cc b phn chc nng c h phng trnh m t h thng.g
Tuyn tnh ha quan h phi tuyn c m t ton hc tuyn tnh. i khi Ph h d hi i s s khi Phng php s dng tn hiu v cng thc Mason tm hm truyn tng ng ca h tuyn tnh.y
nh gi s ph hp ca m hnh. Dng m hnh d bo p ng ca h thng i vi tn
hiu vo cho trc.
31 August 2012 H. T. Hong - HBK TPHCM 83
-
M hnh tuyn tnh ha h phi tuynM hnh tuyn tnh ha h phi tuyn
31 August 2012 H. T. Hong - HBK TPHCM 84
-
im dng ca h phi tuynim dng ca h phi tuyn
Xt h hi t b t bi PTTT hi
))(),(()( ttt uxfx
Xt h phi tuyn bc n c p ng vo, q ng ra m t bi PTTT phituyn:
))(),(()( ttt uxhy
i t thi i l i d h hi t h im trng thi c gi l im dng ca h phi tuyn nu nhh ang trng thi v vi tc ng iu khin c nh, khngi cho trc th h s nm nguyn ti trng thi .
xx u
Nu l im dng ca h phi tuyn th:),( ux
0))(),(( , uuxxuxf tt
i d i l i l i h h hi
31 August 2012 H. T. Hong - HBK TPHCM 85
im dng cn c gi l im lm vic tnh ca h phi tuyn
-
Th d im dng ca h phi tuynTh d im dng ca h phi tuyn
)()()( ttt
)(2)(
)().()()(
21
21
2
1
txtxutxtx
txtx
Cho h phi tuyn m t bi PTTT:
Xc nh im dng ca h thng khi 1)( utu
Gii:i d l hi h h
0))(),(( , uutut xxxfim dng l nghim ca phng trnh:
0201.
21
21
xxxx
2
2
2
1
x
x
2
2
2
1
x
x hoc
31 August 2012 H. T. Hong - HBK TPHCM 86
22x
22
x
-
Tuyn tnh ha h phi tuyn xung quanh im lm vic tnhTuyn tnh ha h phi tuyn xung quanh im lm vic tnh
Xt h phi tuyn m t bi PTTT phi tuyn:
))(),(()())(),(()(
tttttt
uxhyuxfx
Xt h phi tuyn m t bi PTTT phi tuyn:
))(),(()( ttt uxhy
Khai trin Taylor f(x,u) v h(x,u) xung quanh im lm vic tnhta c th m t h thng bng PTTT tuyn tnh:
)(~)(~)(~ ttt uBxAx (*)
),( ux
xxx )()(~ tt
)(~)(~)(~ ttt uDxCy( )
trong :
yyyuuuxxx
)()(~)()(~)()(
tttttt
))(( uxhy
31 August 2012 H. T. Hong - HBK TPHCM 87
yyy )()( tt )),(( uxhy
-
Ma trn trng thi ca h tuyn tnh haMa trn trng thi ca h tuyn tnh ha
222
1
2
1
1
1
f
n
fffxf
xf
xf
222
1
2
1
1
1
f
pfffuf
uf
uf
21)( u,xx
fA
nnn
n
fff
xxx
21
)( u,xufB
nnn
p
fff
uuu
hhh hhh
)(2 u,x nn xxx )(21 u,x puuu
222
1
2
1
1
1
hC
nhhhxh
xh
xh
222
1
2
1
1
1
hD
phhhuh
uh
uh
21)( u,xx
C
qqq
n
xh
xh
xh
xxx
21
)( u,xuD
qqq
p
hhh
uuu
31 August 2012 H. T. Hong - HBK TPHCM 88
)(21 u,x nxxx )(21 u,x puuu
-
Tuyn tnh ha h phi tuyn Tuyn tnh ha h phi tuyn Th d 1Th d 1
Thng s h bn cha :
u(t)qin
Thng s h bn cha :
3
22
80/150
100 ,1
CVk
cmAcma
y(t)u(t)
qout 2
3
sec/981
8.0 ,.sec/150
cmg
CVcmk D
PTTT:
))()(()())(),(()(
tuthtytutt
xxfx
))(),(()( tuthty x
)(94650)(35440)()(2
)( 1 ktgxaCDf
trong :
)(9465.0)(3544.0)()(
),( 11 tutxtu
Ak
Ag
u D xf
)())(),(( 1 txtuth x
31 August 2012 H. T. Hong - HBK TPHCM 89
)())(),(( 1
-
Tuyn tnh ha h phi tuyn Tuyn tnh ha h phi tuyn Th d 1 (tt)Th d 1 (tt)
Tuyn tnh ha h bn cha quanh im y = 20cm:Tuyn tnh ha h bn cha quanh im y = 20cm:
Xc nh im lm vic tnh:20201 x
05.13544.0),( 1 uxuxf 9465.0u
31 August 2012 H. T. Hong - HBK TPHCM 90
-
Tuyn tnh ha h phi tuyn Tuyn tnh ha h phi tuyn Th d 1 (tt)Th d 1 (tt)
Xc nh cc ma trn trng thi ti im lm ic tnh:
0396.02
21
DxA
gaCxfA 5.11
Ak
ufB
Xc nh cc ma trn trng thi ti im lm vic tnh:
2)(1)(1
uu
xAx,x,x )()(
uu Au ,x,x
1 hC 0
hD
)(1 ux ,x )( uu ,x
V PTTT m t h bn cha q anh im lm ic 20cm l: Vy PTTT m t h bn cha quanh im lm vic y=20cm l:
)(~)(~)(~5.1)(~0396.0)(~
tttutt xx
)()(2
),( 1 tuAk
AtgxaC
u D xf )()( tty x
31 August 2012 H. T. Hong - HBK TPHCM 91
)())(),(( 1 txtuth x
-
Tuyn tnh ha h phi tuyn Tuyn tnh ha h phi tuyn Th d 2Th d 2
Thng s cnh tay my :Thng s cnh tay my :
2C
02050
1.0,2.0 ,5.0
mkgJkgM
kgmmlml m
l
2sec/81.9 ,005.0
.02.0,5.0
mgB
mkgJkgM
u
PTTT:
))(),(()())(),(()(
tuthtytutt
xxfx
))(),(()( tuthty x
)(2 tx
trong :
)()(
1)()(
)(cos)()(),(
22212 tumlJtx
mlJBtx
mlJgMlmlu Cxf
31 August 2012 H. T. Hong - HBK TPHCM 92
)())(),(( 1 txtuth x
-
Tuyen tnh hoa he phi tuyen Tuyen tnh hoa he phi tuyen Th du 2Th du 2 (tt)(tt)
Tuyn tnh ha h tay my quanh im lm vic y = /6 (rad):Tuyn tnh ha h tay my quanh im lm vic y = /6 (rad):
Xc nh im lm vic tnh:
6/1 x
01)()(2
BgMlmlx
uxf 02x0
)(1
)(cos
)()(),(
22212
umlJ
xmlJ
BxmlJ
gMlmlu Cxf 2744.1u
Do im lm vic tnh cn xc nh l:
6/1 xx
02x
x
2744.1u
31 August 2012 H. T. Hong - HBK TPHCM 93
-
Tuyen tnh hoa he phi tuyen Tuyen tnh hoa he phi tuyen Th du 2Th du 2 (tt)(tt)
Xc nh cc ma trn trng thi ti im lm ic tnh: Xc nh cc ma trn trng thi ti im lm vic tnh:
2221
1211
aaaa
A
0)(1
111
uxfa
,x1
)(2
112
uxfa
,x
2221
)(12
)(1
221 )(sin)(
)(
u
C
u
txmlJMlml
xfa
xx
)( u,x
)()( uu ,x,x
)(2
)(2
222 )( mlJ
Bxfa
)(1)()()()(
)(2
BgMlmltx
u Cxf
)()(2 )( uu ,x,x
31 August 2012 H. T. Hong - HBK TPHCM 94
)()(
1)()(
)(cos)()(),(
22212 tumlJtx
mlJBtx
mlJgMlmlu Cxf
-
Tuyen tnh hoa he phi tuyen Tuyen tnh hoa he phi tuyen Th du 2Th du 2 (tt)(tt)
Xc nh cc ma trn trng thi ti im lm ic tnh: Xc nh cc ma trn trng thi ti im lm vic tnh:
1
bb
B
01fb
2b
0)(
11
uub
,x
1f2
)(
22
1mlJu
fbu
,x
)(1)()()()(
)(2
BgMlmltx
u Cxf
31 August 2012 H. T. Hong - HBK TPHCM 95
)()(
1)()(
)(cos)()(),(
22212 tumlJtx
mlJBtx
mlJgMlmlu Cxf
-
Tuyen tnh hoa he phi tuyen Tuyen tnh hoa he phi tuyen Th du 2Th du 2 (tt)(tt)
Xc nh cc ma trn trng thi ti im lm ic tnh: Xc nh cc ma trn trng thi ti im lm vic tnh:
11
1
xhc 21 ccC 0
)(22
xhc
)(1 ux ,x )(2 u,x
1dD 0)(
1
uhd
)( uu ,x
Vy phng trnh trng thi cn tm l:
)(~)(~)(~)(~)(~)(~
ttttutt
DCBxAx
)()()( tutty DxC
10
A
0
B 01C 0D
2221 aa
A
2b
B 01C 0D
31 August 2012 H. T. Hong - HBK TPHCM 96
)(),( 1 txuh x
-
Mt s th dMt s th d
31 August 2012 H. T. Hong - HBK TPHCM 97
-
Cc v dCc v d
M h h h h l M hnh ha h con lc ngc M hnh ha h bng v thanh M hnh ha h tay my y y M hnh ha h bnh li my bay M hnh ha c tnh ng hc xe hi M hnh ha c tnh ng hc tu thy M hnh ha c tnh ng hc tu thy M hnh ha h robot 2 bnh cn bng ...
31 August 2012 H. T. Hong - HBK TPHCM 98