JPH0775217A - Traveling speed controller - Google Patents

Traveling speed controller

Info

Publication number
JPH0775217A
JPH0775217A JP5242112A JP24211293A JPH0775217A JP H0775217 A JPH0775217 A JP H0775217A JP 5242112 A JP5242112 A JP 5242112A JP 24211293 A JP24211293 A JP 24211293A JP H0775217 A JPH0775217 A JP H0775217A
Authority
JP
Japan
Prior art keywords
speed
time
relation
pattern
relationship
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5242112A
Other languages
Japanese (ja)
Other versions
JP2833440B2 (en
Inventor
Haruhiko Nakamura
晴彦 中村
Yoshihiro Hata
善裕 畑
Toshimitsu Azuma
俊光 東
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
Original Assignee
Murata Machinery Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Machinery Ltd filed Critical Murata Machinery Ltd
Priority to JP5242112A priority Critical patent/JP2833440B2/en
Publication of JPH0775217A publication Critical patent/JPH0775217A/en
Application granted granted Critical
Publication of JP2833440B2 publication Critical patent/JP2833440B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To improve the distance accuracy of a traveling equipment regardless of undershoot or overshoot by converting the relation between speed and time in an adjustable-speed section into the relation between speed and theoretical position and by comparing measured position with theoretical position. CONSTITUTION:A speed arithmetic unit 2 receives a traveling distance from a running controller 3, reads data from a storage 1 and prepares a speed pattern of speed to time relations. The speed arithmetic unit 2 performs arithmetic operation in such a manner that the speed to time relations in acceleration section and deceleration section prepare a relation along a sine curve and then covert the speed to time relation into the speed to position relation. The running controller 3 drives a running drive motor 5 in accordance with the speed pattern from the speed arithmetic unit 2. In consequence, the speed output value is retained constant until the measured position catches up with the theoretical positions. Therefore, a running carriage can run in a pattern close to a speed pattern determined by the arithmetic operation regardless of the followability of the motor 5.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、例えばスタッカクレー
ンの走行台車、昇降台、フォークのような移動を伴う機
器の移動速度を制御する移動速度制御装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving speed control device for controlling the moving speed of a moving machine such as a traveling truck, a lift, and a fork of a stacker crane.

【0002】[0002]

【従来の技術】本発明者らは、例えばスタッカクレーン
のような移動機器における走行台車の走行、昇降台の昇
降、フォークの伸縮等の移動速度を、速度と時間との関
係がサインカーブに沿った関係になるように制御する方
法を既に提案している。すなわち、図7に示すように、
予め設定された移動機器の最高一定速度VH と発進・停
止時における最低一定速度VLA、VLD、最大加速度aA
及び最大減速度aD を記憶装置に記憶しておき、速度制
御装置に移動距離Lが指示されると、一定速度VLA、V
H 、VLDの間の加減速区間tA 、tD における時間と速
度との関係が、記憶装置に記憶された最大加速度aA
び最大減速度aD を超えることなく、サインカーブに沿
った関係になるよう演算し、起動から停止まで、時間に
対応する値の速度指令の出力を行う。
2. Description of the Related Art The inventors of the present invention have found that the traveling speed of a traveling vehicle in a mobile device such as a stacker crane, elevating an elevating platform, extending and retracting a fork, and the like are such that the relationship between speed and time follows a sine curve. We have already proposed a method to control the relationship. That is, as shown in FIG.
A preset maximum constant speed V H of the mobile device and minimum constant speeds V LA , V LD and maximum acceleration a A when starting and stopping.
And the maximum deceleration a D are stored in the storage device, and when the moving distance L is instructed to the speed control device, the constant speeds V LA , V
The relationship between time and speed in the acceleration / deceleration sections t A and t D between H and V LD is along the sine curve without exceeding the maximum acceleration a A and the maximum deceleration a D stored in the storage device. It calculates so that it has a relation, and outputs the speed command of the value corresponding to time from start to stop.

【0003】[0003]

【発明が解決しようとする課題】このような移動速度制
御によると、加減速区間と一定速度区間との間の移行時
には加減速度が0になるので、移動機器に衝撃や振動が
生ずることがないという効果がある。しかし、実際には
誘導モータのすべりにより完全に追従するのは不可能で
るから、図7に示すようなアンダーシュートU、オーバ
ーシュートOが生じて距離精度に影響を与え、クリープ
距離がばらついてしまう。クリープ距離が長くなるとサ
イクルタイムに悪影響を及ぼす。クリープ距離が取れな
いと、オーバーランしたり、最低一定速度VLDより大き
な速度で急停止して移動機器に衝撃や振動が生じてしま
う。
According to such a moving speed control, since the acceleration / deceleration becomes 0 at the time of transition between the acceleration / deceleration section and the constant speed section, no impact or vibration occurs on the mobile equipment. There is an effect. However, in reality, it is impossible to completely follow the slippage of the induction motor, so undershoot U and overshoot O as shown in FIG. 7 occur, which affects the distance accuracy and the creep distance varies. . A longer creep distance adversely affects the cycle time. If the creep distance is not secured, overrun or sudden stop at a speed higher than the minimum constant speed V LD causes shock or vibration in the mobile device.

【0004】よって本発明の目的は、アンダーシュート
やオーバーシュートに拘わらず、移動機器の距離精度を
向上させることのできる移動速度制御装置を提供するこ
とにある。
Therefore, an object of the present invention is to provide a moving speed control device capable of improving the distance accuracy of a mobile device regardless of undershoot or overshoot.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に本発明は、加減速区間における速度と時間との関係を
速度と理論位置との関係に換算し、移動中の補正タイミ
ングにおいて実測位置と理論位置とを比較し、実測位置
が既に達している理論位置に対応する速度を指令するよ
うに移動速度制御装置を構成した。
In order to achieve the above object, the present invention converts the relationship between speed and time in an acceleration / deceleration section into the relationship between speed and theoretical position, and measures the actual position at the correction timing during movement. And the theoretical position are compared with each other, and the moving speed control device is configured to command the speed corresponding to the theoretical position at which the measured position has already reached.

【0006】[0006]

【作用】本発明は上記の構成としたので、次のような作
用を奏する。
Since the present invention has the above-mentioned structure, it has the following effects.

【0007】本発明に係る移動速度制御装置によれば、
移動速度制御装置は、加減速区間における速度と時間と
の関係を速度と理論位置との関係に換算する。移動中に
は、補正タイミングにおいて実測位置と理論位置とを比
較する。速度指令は、実測位置が既に達している理論位
置に対応する速度を出力する。
According to the moving speed control device of the present invention,
The moving speed control device converts the relationship between the speed and the time in the acceleration / deceleration section into the relationship between the speed and the theoretical position. During the movement, the measured position and the theoretical position are compared at the correction timing. The speed command outputs the speed corresponding to the theoretical position at which the measured position has already reached.

【0008】[0008]

【実施例】以下図示の実施例について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below.

【0009】図1は、本発明に係る移動速度制御装置の
スタッカクレーンの走行台車に適用された一実施例の構
成を示すブロック図である。
FIG. 1 is a block diagram showing the configuration of an embodiment applied to a traveling carriage of a stacker crane of a moving speed control device according to the present invention.

【0010】同図において、記憶装置1にはスタッカク
レーンの走行台車の通常運転速度である最高速度vH
発進時における最低速度vLA、停止時における最低速度
LD、最大加速度aA 、最大減速度aD が記憶されてい
る。速度演算装置2は、走行制御装置3から移動距離L
を受信して、記憶装置1から上記各データを読み出し、
速度と時間との関係の速度パターンを生成する。
In FIG. 1, the storage device 1 has a maximum speed v H , which is a normal operating speed of a traveling vehicle of a stacker crane,
The minimum speed v LA when starting, the minimum speed v LD when stopping, the maximum acceleration a A , and the maximum deceleration a D are stored. The speed calculation device 2 is moved by the travel distance L from the travel control device 3.
To read the above data from the storage device 1,
A velocity pattern of the relation between velocity and time is generated.

【0011】最高速度vH は、走行台車の性能や安全性
に基づいて決定された通常運転速度であり、発進時最低
速度vLAは発進してすぐに達する最低速度、停止時最低
速度vLDは制動により即停止できる最低速度である。最
大加速度aA 及び最大減速度aD は、性能や安全性に基
づいて定まる。走行距離Lは作業指示によりその都度変
化する。
The maximum speed v H is a normal operation speed determined on the basis of the performance and safety of the traveling vehicle, and the minimum speed v LA at the start is the minimum speed reached immediately after starting and the minimum speed v LD at the stop. Is the minimum speed that can be stopped immediately by braking. The maximum acceleration a A and the maximum deceleration a D are determined based on performance and safety. The traveling distance L changes each time according to the work instruction.

【0012】速度演算装置2は、発進時最低速度vLA
最高速度vH で走行する区間との間の加速区間、及び最
高速度vH で走行する区間と停止時最低速度vLDで走行
するクリープ区間との間の減速区間が、図7に示したよ
うに速度と時間との関係がサインカーブに沿った関係に
なるように演算を行う。
[0012] speed calculating unit 2 is driven by the start at the minimum velocity v LA and the maximum speed v accelerating section between a section running at H, and the maximum speed v interval and stop at the minimum speed to travel at H v LD The deceleration section between the creep section and the creep section is calculated so that the relationship between the speed and the time has a sine curve relationship as shown in FIG.

【0013】さらに、速度演算装置2は、速度Vと時間
tとの関係を速度Vと位置xとの関係に換算する。図2
に示すように、記憶装置1の各データに基づいて演算し
た速度パターンを時間tについて積分すれば、時間tと
位置xとの関係を得ることができる。さらに、その位置
xにおける速度Vを求め、図3に示すような位置xと速
度Vとの関係からなる速度パターンを得ることができ
る。
Further, the speed calculation device 2 converts the relationship between the speed V and the time t into the relationship between the speed V and the position x. Figure 2
As shown in, by integrating the velocity pattern calculated based on each data of the storage device 1 with respect to the time t, the relationship between the time t and the position x can be obtained. Further, the velocity V at the position x can be obtained to obtain a velocity pattern having the relationship between the position x and the velocity V as shown in FIG.

【0014】走行制御装置3は速度演算装置2から位置
xと速度Vとの関係からなる速度パターンを受け取っ
て、速度パターンに従ってインバータ4を作動させ、走
行駆動モータ5を駆動させることにより走行台車を移動
させる。走行制御装置3には、走行台車の位置を測定す
るエンコーダ6が接続されている。
The traveling control device 3 receives a speed pattern having a relationship between the position x and the speed V from the speed calculation device 2, operates the inverter 4 according to the speed pattern, and drives the travel drive motor 5 to drive the traveling carriage. To move. An encoder 6 that measures the position of the traveling vehicle is connected to the traveling control device 3.

【0015】なお、位置xと速度Vとの関係からなる速
度パターンのデータは、実際には図4に示すようなテー
ブルの形式である。中間の速度指令値data[n]、
右側の理論位置dist[n]は、それぞれ左側のテー
ブル番号nに対応する値である。
The data of the velocity pattern consisting of the relationship between the position x and the velocity V is actually in the form of a table as shown in FIG. Intermediate speed command value data [n],
The theoretical position dist [n] on the right side is a value corresponding to the table number n on the left side.

【0016】次に、図5のフローチャートに従って、走
行制御装置3の走行台車移動中の走行制御の過程につい
て説明する。
Next, the process of traveling control of the traveling control device 3 while the traveling vehicle is moving will be described with reference to the flowchart of FIG.

【0017】走行制御装置3は、起動から停止まで、補
正タイミング(例えば5msec間隔)ごとに速度指令
の補正を行う。まず、補正タイミングか否かを判断し
(ステップ1)、補正タイミングでなければテーブル番
号に応じた速度指令値data[n]を出力値とする
(ステップ2)。図4によると、起動時にはテーブル番
号は0であり、速度指令値data[0]は10であ
り、この値は次の補正タイミングまで変わらない。
The traveling control device 3 corrects the speed command at every correction timing (for example, every 5 msec) from start to stop. First, it is judged whether or not it is the correction timing (step 1), and if it is not the correction timing, the speed command value data [n] corresponding to the table number is set as the output value (step 2). According to FIG. 4, at startup, the table number is 0 and the speed command value data [0] is 10, and this value does not change until the next correction timing.

【0018】補正タイミングになると、理論位置dis
t[n]と、エンコーダ6により測定された実測位置と
を比較する(ステップ3)。理論位置dist[n]が
実測位置未満ならば、引き続き同じ速度指令値data
[n]が出力値となる(ステップ2)。
At the correction timing, the theoretical position dis
The t [n] is compared with the actually measured position measured by the encoder 6 (step 3). If the theoretical position dist [n] is less than the actually measured position, the same speed command value data continues.
[N] becomes an output value (step 2).

【0019】理論位置dist[n]が実測位置以上な
らば、n=n+1とし、速度指令値data[n]を出
力する(ステップ4)。すなわち、図4に示すように、
実測位置が理論位置dist[0]=43を越えると、
n=0+1とし、速度指令値data[1]=11が出
力値となる。
If the theoretical position dist [n] is not less than the measured position, n = n + 1 is set and the speed command value data [n] is output (step 4). That is, as shown in FIG.
When the measured position exceeds the theoretical position dist [0] = 43,
With n = 0 + 1, the speed command value data [1] = 11 becomes the output value.

【0020】以上のようにして決定された出力値を走行
制御装置3がインバータ4に出力し(ステップ5)、以
上の過程を停止まで繰り返す。
The travel control device 3 outputs the output value thus determined to the inverter 4 (step 5), and the above process is repeated until it is stopped.

【0021】以上のような制御によると、図6に示すよ
うに、理論位置に実測位置が追い付くまで速度出力値を
変えずに一定に保持するので、モータ5の追従性いかん
に拘わらず、演算により求めた速度パターンに近いパタ
ーンで走行台車を走行させることができる。よって位置
精度を高くすることができ、停止時最低一定速度VLD
走行するクリープ距離を一定に保持することができる。
従って、サイクルタイムを短くするためにクリープ距離
を短くしても、オーバーランや急停止などの事故の生じ
ることはない。
According to the above control, as shown in FIG. 6, the speed output value is held constant until the measured position catches up with the theoretical position, so that the calculation is performed regardless of the followability of the motor 5. The traveling carriage can be caused to travel in a pattern close to the speed pattern obtained by. Therefore, the positional accuracy can be increased, and the creep distance traveling at the minimum constant speed V LD at the time of stop can be kept constant.
Therefore, even if the creep distance is shortened to shorten the cycle time, an accident such as overrun or sudden stop does not occur.

【0022】以上本発明の実施例について説明したが、
本発明は上記実施例に限定されるものではなく、本発明
の要旨の範囲内において適宜変形実施可能であることは
言うまでもない。
The embodiment of the present invention has been described above.
It is needless to say that the present invention is not limited to the above-mentioned embodiments and can be appropriately modified within the scope of the gist of the present invention.

【0023】例えば上記実施例はスタッカクレーンの走
行台車の移動に適用されたものであるが、スタッカクレ
ーンの昇降台やスライドフォーク、その他の移動を伴う
機器にも適用可能である。また、本発明は、スタッカク
レーンの走行台車において一般的に行われている三角制
御等にも適用可能であり、速度と時間との関係は上記実
施例のサインカーブに沿うものに特に限定されない。
For example, the above-mentioned embodiment is applied to the movement of the traveling carriage of the stacker crane, but it is also applicable to the lifting platform of the stacker crane, the slide fork, and other moving equipment. Further, the present invention is also applicable to triangular control or the like that is generally performed in a traveling truck of a stacker crane, and the relationship between speed and time is not particularly limited to the one that follows the sine curve of the above embodiment.

【0024】[0024]

【発明の効果】以上のように本発明に係る移動速度制御
装置によれば、移動機器の速度制御を時間によらずに、
位置に基づいて行うので、位置誤差が生まれにくく、位
置精度を高めることができる。よって、クリープ距離の
ばらつきによりサイクルタイムに悪影響を及ぼしたり、
オーバーランしたり、最低一定速度より大きな速度で急
停止して移動機器に衝撃や振動が生じる事故を防止する
ことができる。また、速度出力の応答遅れが生じても、
実測位置が理論位置に到達するまで速度指令を維持する
ので、モータの応答性に関係なく精度の高い走行駆動が
可能である。
As described above, according to the moving speed control device of the present invention, the speed control of the mobile device can be performed regardless of time.
Since it is performed based on the position, a position error is less likely to occur and the position accuracy can be improved. Therefore, variations in creep distance may adversely affect cycle time,
It is possible to prevent accidents in which a mobile device is overrun or suddenly stops at a speed higher than a certain constant speed to cause shock or vibration to the mobile device. Also, even if the response delay of the speed output occurs,
Since the speed command is maintained until the measured position reaches the theoretical position, highly accurate traveling drive is possible regardless of the responsiveness of the motor.

【図面の簡単な説明】[Brief description of drawings]

【図1】図1は、本発明に係る移動速度制御装置の一実
施例の構成を示すブロック図である。
FIG. 1 is a block diagram showing the configuration of an embodiment of a moving speed control device according to the present invention.

【図2】図2は、図1の実施例における時間−速度の関
係の速度パターンを位置−速度の関係の速度パターンに
換算する過程を図説的に示す図である。
FIG. 2 is a diagram schematically showing a process of converting a time-speed relationship speed pattern into a position-speed relationship speed pattern in the embodiment of FIG. 1;

【図3】図3は、図2の過程により生成された位置−速
度の関係の速度パターンを示す図である。
FIG. 3 is a diagram showing a velocity pattern of a position-velocity relationship generated by the process of FIG.

【図4】図4は、図3の速度パターンのデータをテーブ
ル化した例を示す図である。
FIG. 4 is a diagram showing an example in which data of the speed pattern of FIG. 3 is tabulated.

【図5】図5は、図1の実施例による速度指令の出力値
の決定の過程を説明するフローチャートである。
5 is a flowchart illustrating a process of determining an output value of a speed command according to the embodiment of FIG.

【図6】図6は、図5の速度指令の出力に従って補正タ
イミングごとに変化する出力値と実際の速度との関係を
示す図である。
6 is a diagram showing a relationship between an output value that changes at each correction timing according to the output of the speed command of FIG. 5 and an actual speed.

【図7】図7は、時間−速度の関係の速度パターンを示
す図である。
FIG. 7 is a diagram showing a speed pattern of a time-speed relationship.

【符号の説明】[Explanation of symbols]

H 最高速度 vLA 発進時最低速度 vLD 停止時最低速度v H maximum speed v LA minimum speed when starting v LD minimum speed when stopping

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 加減速区間における速度と時間との関係
を速度と理論位置との関係に換算し、移動中の補正タイ
ミングにおいて実測位置と理論位置とを比較し、実測位
置が既に達している理論位置に対応する速度を指令する
ことを特徴とする移動速度制御装置。
1. The relationship between speed and time in an acceleration / deceleration section is converted into the relationship between speed and theoretical position, and the measured position and theoretical position are compared at a correction timing during movement, and the measured position has already reached. A moving speed control device characterized by commanding a speed corresponding to a theoretical position.
JP5242112A 1993-09-03 1993-09-03 Moving speed control device Expired - Lifetime JP2833440B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5242112A JP2833440B2 (en) 1993-09-03 1993-09-03 Moving speed control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5242112A JP2833440B2 (en) 1993-09-03 1993-09-03 Moving speed control device

Publications (2)

Publication Number Publication Date
JPH0775217A true JPH0775217A (en) 1995-03-17
JP2833440B2 JP2833440B2 (en) 1998-12-09

Family

ID=17084481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5242112A Expired - Lifetime JP2833440B2 (en) 1993-09-03 1993-09-03 Moving speed control device

Country Status (1)

Country Link
JP (1) JP2833440B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112653355A (en) * 2020-12-23 2021-04-13 盛视科技股份有限公司 Electric door speed control method and system

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Publication number Priority date Publication date Assignee Title
JPS63186581A (en) * 1987-01-27 1988-08-02 Star Seiki:Kk Driver for induction motor
JPH02243403A (en) * 1989-03-17 1990-09-27 Hitachi Ltd Origin return method and device for sticker crane

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Publication number Priority date Publication date Assignee Title
JPS63186581A (en) * 1987-01-27 1988-08-02 Star Seiki:Kk Driver for induction motor
JPH02243403A (en) * 1989-03-17 1990-09-27 Hitachi Ltd Origin return method and device for sticker crane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112653355A (en) * 2020-12-23 2021-04-13 盛视科技股份有限公司 Electric door speed control method and system
CN112653355B (en) * 2020-12-23 2023-12-26 盛视科技股份有限公司 Electric door speed control method and system

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