FI89419B - Foerfarande foer att kontrollera en parameter som baserar sig pao filtrerade data hos arkformigt material - Google Patents

Foerfarande foer att kontrollera en parameter som baserar sig pao filtrerade data hos arkformigt material Download PDF

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Publication number
FI89419B
FI89419B FI854562A FI854562A FI89419B FI 89419 B FI89419 B FI 89419B FI 854562 A FI854562 A FI 854562A FI 854562 A FI854562 A FI 854562A FI 89419 B FI89419 B FI 89419B
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FI
Finland
Prior art keywords
data
sheet
parameter
sensing means
filter factor
Prior art date
Application number
FI854562A
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English (en)
Finnish (fi)
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FI854562A0 (fi
FI854562A (fi
FI89419C (sv
Inventor
Hung-Tzaw Hu
Original Assignee
Measurex Corp
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Filing date
Publication date
Application filed by Measurex Corp filed Critical Measurex Corp
Publication of FI854562A0 publication Critical patent/FI854562A0/fi
Publication of FI854562A publication Critical patent/FI854562A/fi
Publication of FI89419B publication Critical patent/FI89419B/fi
Application granted granted Critical
Publication of FI89419C publication Critical patent/FI89419C/sv

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Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00Automatic controllers
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21GCALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00Other accessories for paper-making machines
    • D21G9/0009Paper-making control systems
    • D21G9/0027Paper-making control systems controlling the forming section
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21GCALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00Other accessories for paper-making machines
    • D21G9/0009Paper-making control systems
    • D21G9/0054Paper-making control systems details of algorithms or programs
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B21/00Systems involving sampling of the variable controlled
    • G05B21/02Systems involving sampling of the variable controlled electric
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D5/00Control of dimensions of material
    • G05D5/02Control of dimensions of material of thickness, e.g. of rolled material
    • G05D5/03Control of dimensions of material of thickness, e.g. of rolled material characterised by the use of electric means

Claims (9)

1. Förfarande för regiering av en parameter hos ett ark-formigt material som tillverkas, varvid det arkformiga materialet hälls i rörelse; avkänningsorgan bringas att röra sig tvärs över arket ett flertal gänger (i); en parameter hos det arkformiga materialet mäts medelst av-känningsorganet i ett flertal zoner (j), vilka är belägna intill varandra tvärs över arket, i och för bildande av ett flertal data; sagda data filtreras under användande av en filtreringsfak-tor; och parametern regleras pä basen av de filtrerade data, kännetecknat av att filterfaktorn beräknas pä basen av de uppmätta och filtrerade data.
2. Förfarande enligt patentkravet 1, kännetecknat av att filterfaktorn S(i,j) beräknas baserat pä en relativt längva-rig variation L(i,j) av sagda data. 9 89419
3. Förfarande enligt patentkravet 2, kännetecknat av att S(i,j) = a + { [ABS[L(i)]/Nom]/M}[U-a], där a, U, M och Nom utgör pä förhand bestämda konstanter och ifall X(i,j) - Y(i-l,j) a 0, är L(i,j) = Min X(i,j) -Y(i-l,j); T(i-1,j) eller ifall X(i,j) - Y(i-1,j) < 0, är L(i,j) = 0,0, där T(i-1,j) = U[D(i-1,j)] + [1-U]T(i-2,j); U är konstant, D(i-1,j) = X(i-l,j) - Y(i-1,j); Y(i-i,j) är de filtrerade data; och X(i,j) är de medelst avkänningsorganen uppmätta data.
4. Förfarande enligt patentkravet 1, kännetecknat av att de med avkänningsorganen uppmätta data identifieras säsom X(i,j) och filterfaktorn säsom S(i,j).
5. Förfarande enligt patentkravet 1, kännetecknat av att man beräknar en andra filterfaktor r(i,j) och filtrerar data upprepat under användning av de bäda filterfaktorerna β (i,j) och Γ(i,j).
6. Förfarande enligt patentkravet 5, kännetecknat av att den andra filterfaktorn r(i,j) beräknas pä basen av en rela-tivt kortvarig variation hos data X(i,j).
7. Förfarande enligt patentkravet 6, kännetecknat av att Γ(i,j) = a - {[ABS[S(i,j)]/Nom]/M}[α-F], där a, F, M och Nom utgör pä förhand bestämda konstanter och S (i,j) = [X(i,j) -Y(i-l,j)] - L(i,j), där Y(i-l,j) utgör de filtrerade data och L(i,j) är den längvariga variationen i maskinriktningen.
8. Förfarande enligt patentkravet 1, kännetecknat av att filterfaktorn beräknas dä avkänningsorganet rört sig tvärs över arket.
9. Förfarande enligt patentkravet 8, kännetecknat av att filterfaktorn beräknas pä nytt var och en gäng när avkänningsorganet rört sig tvärs över arket.
FI854562A 1984-11-20 1985-11-19 Förfarande för att kontrollera en parameter som baserar sig på filtrer ade data hos arkformigt material FI89419C (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67396684 1984-11-20
US06/673,966 US4707779A (en) 1984-11-20 1984-11-20 Process for controlling a parameter based upon filtered data

Publications (4)

Publication Number Publication Date
FI854562A0 FI854562A0 (fi) 1985-11-19
FI854562A FI854562A (fi) 1986-05-21
FI89419B true FI89419B (fi) 1993-06-15
FI89419C FI89419C (sv) 1993-09-27

Family

ID=24704808

Family Applications (1)

Application Number Title Priority Date Filing Date
FI854562A FI89419C (sv) 1984-11-20 1985-11-19 Förfarande för att kontrollera en parameter som baserar sig på filtrer ade data hos arkformigt material

Country Status (6)

Country Link
US (1) US4707779A (sv)
EP (1) EP0183401A3 (sv)
JP (1) JPS61182101A (sv)
KR (1) KR860004341A (sv)
CA (1) CA1240398A (sv)
FI (1) FI89419C (sv)

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US5777872A (en) * 1996-09-13 1998-07-07 Honeywell-Measurex Corporation Method and system for controlling a multiple input/output process with minimum latency
US5892679A (en) * 1996-09-13 1999-04-06 Honeywell-Measurex Corporation Method and system for controlling a multiple input/output process with minimum latency using a pseudo inverse constant
US5901059A (en) * 1996-09-13 1999-05-04 Honeywell Measurex Corp Method and apparatus for controlling a process using adaptive prediction feedback
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US5891306A (en) * 1996-12-13 1999-04-06 Measurex Corporation Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems
US5928475A (en) * 1996-12-13 1999-07-27 Honeywell-Measurex, Corporation High resolution system and method for measurement of traveling web
US6072309A (en) * 1996-12-13 2000-06-06 Honeywell-Measurex Corporation, Inc. Paper stock zeta potential measurement and control
US6341522B1 (en) 1996-12-13 2002-01-29 Measurex Corporation Water weight sensor array imbedded in a sheetmaking machine roll
US5853543A (en) * 1997-01-27 1998-12-29 Honeywell-Measurex Corporation Method for monitoring and controlling water content in paper stock in a paper making machine
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Also Published As

Publication number Publication date
EP0183401A2 (en) 1986-06-04
KR860004341A (ko) 1986-06-20
FI854562A0 (fi) 1985-11-19
EP0183401A3 (en) 1988-08-24
JPS61182101A (ja) 1986-08-14
FI854562A (fi) 1986-05-21
FI89419C (sv) 1993-09-27
CA1240398A (en) 1988-08-09
US4707779A (en) 1987-11-17

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Owner name: MEASUREX CORPORATION