JP6241483B2 - フィードバック制御装置 - Google Patents
フィードバック制御装置 Download PDFInfo
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- JP6241483B2 JP6241483B2 JP2015562702A JP2015562702A JP6241483B2 JP 6241483 B2 JP6241483 B2 JP 6241483B2 JP 2015562702 A JP2015562702 A JP 2015562702A JP 2015562702 A JP2015562702 A JP 2015562702A JP 6241483 B2 JP6241483 B2 JP 6241483B2
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- 238000012545 processing Methods 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 12
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- 230000001276 controlling effect Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 2
- 238000000194 supercritical-fluid extraction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 18
- 238000004808 supercritical fluid chromatography Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 10
- 230000010354 integration Effects 0.000 description 8
- 230000004044 response Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
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- 230000003321 amplification Effects 0.000 description 3
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- 238000003199 nucleic acid amplification method Methods 0.000 description 3
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- 229910001220 stainless steel Inorganic materials 0.000 description 3
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- 230000002411 adverse Effects 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
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- 230000001052 transient effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/43—Programme-control systems fluidic
- G05B19/46—Programme-control systems fluidic hydraulic
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/024—Controlling the inlet pressure, e.g. back-pressure regulator
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/26—Selective adsorption, e.g. chromatography characterised by the separation mechanism
- B01D15/40—Selective adsorption, e.g. chromatography characterised by the separation mechanism using supercritical fluid as mobile phase or eluent
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
- G01N2030/328—Control of physical parameters of the fluid carrier of pressure or speed valves, e.g. check valves of pumps
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/41—Servomotor, servo controller till figures
- G05B2219/41316—Piezo valve
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/42—Servomotor, servo controller kind till VSS
- G05B2219/42034—Pi regulator
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Feedback Control In General (AREA)
- Control Of Fluid Pressure (AREA)
Description
ピエゾ素子10を実際に押し引きする動作量は設定圧力Psetとモニタリング圧力Pmonitorの差の定数倍である。圧力計8から得られる電圧値をVP_monとし、設定圧力Psetに対応する電圧値をVP_set、ゲインをKPとすると、ピエゾ素子10に出力される電圧VPZTは式(1)で表される。
VPZT=KP(VP_set−VP_mon) (1)
PI制御は式(1)に積分項を加えたもので、式(2)で表される制御を行う。
式(2)の第二項の積分要素によって、左辺VPZTと右辺第一項がつりあったとしても、右辺第二項はVP_setとVP_monが等しい値となるまで増幅されるため、ピエゾ素子10の押し量を増加又は減少させ続けることによって、圧力が目標値と一致するまで昇圧又は減圧させ続けることが可能となる。
ここでKIは積分ゲインであり、制御系に合わせて適当に調整するが、I制御全体のゲインは図8に示した電気回路の増幅率も合わせてKIRP/RIで表される。
ポンプによる送液開始の直後は状態が安定せず、P制御とPI制御のいずれの場合も圧力を一定に保つためにピエゾ電圧が変化し、結果的に定常偏差の値が変化するため圧力がわずかに変化している。
6 弁
8 検出器としての圧力計
10 ピエゾ素子
14 演算増幅器
16 P制御回路
18 I制御部
20 デジタル処理部
28 差分算出部
30 しきい値保持部
32 第1比較部
34 積分部
36 上限値保持部
38 第2比較部
Claims (4)
- 制御対象に基づく出力値を検出する検出器と、
前記検出器の検出値と目標値を差動増幅回路のそれぞれの入力とし、前記差動増幅回路の出力にP制御成分VPを出力するアナログ回路からなるP制御回路と、
前記検出値と前記目標値との偏差をデジタル処理により積分することによりI制御成分VIを出力するI制御部と、
前記P制御回路からのP制御成分VPと前記I制御部からのI制御成分VIに基づいて駆動されて前記制御対象を制御する駆動素子と、を備え、
前記I制御成分V I が前記検出器の検出値とともに前記差動増幅回路の一方の入力端子に入力されるように前記I制御部と前記P制御回路が接続され、
前記差動増幅回路の出力端子が前記駆動素子に接続されている、フィードバック制御装置。 - 前記I制御部は、前記検出値と前記目標値との偏差に対するしきい値VP_upperを保持するしきい値保持部と、
前記偏差が前記しきい値保持部に保持されたしきい値VP_upperを超えていれば出力のI制御成分VIをゼロにリセットし、前記偏差が前記しきい値保持部に保持されたしきい値VP_upper以下のときに前記偏差の積分を継続する第1比較部と、
をさらに備えている請求項1に記載のフィードバック制御装置。 - 前記I制御部は、I制御成分VIの上限値VI_MAXを保持する上限値保持部と、
I制御成分VIを前記上限値保持部に保持された上限値と比較してI制御成分VI出力値が前記上限値を超えないように規制する第2比較部と、
をさらに備えている請求項1又は2に記載のフィードバック制御装置。 - 前記制御対象は超臨界流体クロマトグラフ装置又は超臨界流体抽出装置の分析流路の検出器の下流に設けられた圧力制御装置の背圧調整弁であり、
前記検出器は前記分析流路において前記背圧調整弁の上流に設けられた圧力計であり、
前記駆動素子は前記背圧調整弁を制御するアクチュエータであり、
前記圧力計の検出値と目標値に基づいて前記背圧調整弁をPI制御する請求項1から3のいずれか一項に記載のフィードバック制御装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014027870 | 2014-02-17 | ||
JP2014027870 | 2014-02-17 | ||
PCT/JP2014/082803 WO2015122088A1 (ja) | 2014-02-17 | 2014-12-11 | フィードバック制御装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2015122088A1 JPWO2015122088A1 (ja) | 2017-03-30 |
JP6241483B2 true JP6241483B2 (ja) | 2017-12-06 |
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Family Applications (1)
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JP2015562702A Active JP6241483B2 (ja) | 2014-02-17 | 2014-12-11 | フィードバック制御装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10184919B2 (ja) |
EP (1) | EP3109714B1 (ja) |
JP (1) | JP6241483B2 (ja) |
CN (1) | CN106233209B (ja) |
WO (1) | WO2015122088A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107727780A (zh) * | 2017-08-30 | 2018-02-23 | 聚光科技(杭州)股份有限公司 | 在线色谱的电子压力控制装置及方法 |
JP7144176B2 (ja) * | 2018-04-13 | 2022-09-29 | 株式会社島津製作所 | 抽出物の回収方法および分析方法 |
CN112532054B (zh) * | 2020-11-12 | 2022-03-25 | 苏州浪潮智能科技有限公司 | 一种自动调整电压调整器的系统、方法及介质 |
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2014
- 2014-12-11 CN CN201480078024.7A patent/CN106233209B/zh active Active
- 2014-12-11 US US15/118,517 patent/US10184919B2/en active Active
- 2014-12-11 WO PCT/JP2014/082803 patent/WO2015122088A1/ja active Application Filing
- 2014-12-11 JP JP2015562702A patent/JP6241483B2/ja active Active
- 2014-12-11 EP EP14882634.0A patent/EP3109714B1/en active Active
Also Published As
Publication number | Publication date |
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JPWO2015122088A1 (ja) | 2017-03-30 |
US10184919B2 (en) | 2019-01-22 |
US20170045482A1 (en) | 2017-02-16 |
WO2015122088A1 (ja) | 2015-08-20 |
EP3109714A4 (en) | 2017-10-11 |
EP3109714B1 (en) | 2022-03-23 |
CN106233209B (zh) | 2019-08-09 |
EP3109714A1 (en) | 2016-12-28 |
CN106233209A (zh) | 2016-12-14 |
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