JPH04114214A - Power controller for working body - Google Patents

Power controller for working body

Info

Publication number
JPH04114214A
JPH04114214A JP23309790A JP23309790A JPH04114214A JP H04114214 A JPH04114214 A JP H04114214A JP 23309790 A JP23309790 A JP 23309790A JP 23309790 A JP23309790 A JP 23309790A JP H04114214 A JPH04114214 A JP H04114214A
Authority
JP
Japan
Prior art keywords
force
gripper
slide mechanism
arm
control
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.)
Pending
Application number
JP23309790A
Other languages
Japanese (ja)
Inventor
Kazuhito Kasuga
春日 一仁
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP23309790A priority Critical patent/JPH04114214A/en
Publication of JPH04114214A publication Critical patent/JPH04114214A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To enable stable operation control on various adaptive conditions by providing a slide mechanism to freely movably support an operation part in an axial direction, and an energizing means to energize energizing force to the operation part of a working body corresponding to a moving position. CONSTITUTION:A slide mechanism 12 is provided to freely movably support a gripper 10a in the axial direction between a driving motor 11 and the gripper 10a of an arm 10, and a spring member 13 is provided to impress the energizing force to the gripper 10a of the arm 10 corresponding to the moving position controlled by this slide mechanism 12. Then, the force applied onto the gripper 10a is controlled to be constant by controlling the moving position of the slide mechanism 12. Thus, since the gripper 10a of the arm 10 is controlled to be abutted on an object 16 with the almost constant force corresponding to a change on the abutting face of the object 16, the stable operation control is realized corresponding to the adaptive condition.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) この発明は、例えばマニピュレータ等の作業体の作動部
の力を制御するのに用いる作業体の力制御装置に関する
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a force control device for a work body used to control the force of an operating part of a work body such as a manipulator.

(従来の技術) 一般に、マニピュレータの力制御装置においては、第4
図に示す目標値(力)に対して力/トルクセンサ1で検
出したダイナミクス2の力/トルクを減算器3で減算し
て駆動信号を求め、この駆動信号に対応して駆動モータ
4を駆動してアーム5を作動制御する能動的力制御方式
のものがある。
(Prior Art) Generally, in a force control device for a manipulator, a fourth
The force/torque of dynamics 2 detected by force/torque sensor 1 is subtracted by subtractor 3 from the target value (force) shown in the figure to obtain a drive signal, and drive motor 4 is driven in response to this drive signal. There is an active force control system that controls the operation of the arm 5 by controlling the arm 5.

ところが、上記力制御装置では、その構成上、高性能な
力/トルクセンサ1を備えなければならないために、外
乱が発生したり、あるいは先端部に被作業物が付いて外
力が加わったりすると、系が発振したりして、不安定と
なるという問題を有する。
However, because the above-mentioned force control device must be equipped with a high-performance force/torque sensor 1 due to its configuration, if a disturbance occurs or if an external force is applied due to a workpiece attached to the tip, The problem is that the system oscillates and becomes unstable.

また、このような力制御装置としては、第5図に示すよ
うに目標値(位置)に応じて駆動モータ4aを駆動し、
そのダイナミクス2aに設けたばね機構6によりアーム
5aの力を制御する受動的力制御方式がある。
Further, as shown in FIG. 5, such a force control device drives a drive motor 4a according to a target value (position),
There is a passive force control method in which the force of the arm 5a is controlled by a spring mechanism 6 provided in the dynamics 2a.

しかしながら、上記受動的力制御方式の力制制御装置で
は、その構成上、例えばアーム5aのならい動作や、一
定の力で作動させたりするのが困難であるうえ、アーム
5aに対して過剰な外力が加わった場合に、いわゆる逃
げが困難となるという問題を有していた。
However, in the above-mentioned passive force control type force control device, due to its configuration, it is difficult to perform a tracing motion of the arm 5a or operate it with a constant force, and in addition, an excessive external force is applied to the arm 5a. When this happens, there is a problem in that it becomes difficult to escape.

(発明が解決しようとする課題) 以上述べたように、従来の力制御装置では、いづれのも
のも適応状況に応じて、その動作制御が不安定となると
いう問題を有していた。
(Problems to be Solved by the Invention) As described above, all conventional force control devices have a problem in that their operation control becomes unstable depending on the adaptation situation.

この発明は上記の事情に鑑みてなされたもので、簡易な
構成で、適応能力の向上を図り、各種適応状況において
安定した動作制御を実現し得るようにした作業体の力制
御装置を提供することを目的とする。
The present invention has been made in view of the above circumstances, and provides a force control device for a work body that has a simple configuration, improves adaptability, and realizes stable motion control in various adaptable situations. The purpose is to

[発明の構成コ (課題を解決するための手段) この発明は、作業体を作動制御する複数の駆動モータと
、前記作業体に設けられる作動部と前記駆動モータとの
間に介在され、前記作動部を軸方向に移動自在に支持す
るスライド機構と、このスライド機構のU]る移動位置
に応した付勢力をIiJ記作業体の作動部に付勢する付
勢手段と、前記駆動モータを駆動制御17て前記スライ
ド機構の移動位置を制御し、前記付勢手段の付勢力を制
御する制御手段とを備えて作業体の力制御装置を構成し
たものである。
[Configuration of the Invention (Means for Solving the Problems) This invention provides a plurality of drive motors for controlling the operation of a working body, a plurality of drive motors that are interposed between an actuating part provided on the working body and the drive motor, a slide mechanism that supports the actuating part so as to be movable in the axial direction; a biasing means that applies a biasing force corresponding to the moving position of the slide mechanism to the actuating part of the work body IiJ; and the drive motor. A drive control device 17 is provided to control the movement position of the slide mechanism, and a control means for controlling the urging force of the urging means to constitute a force control device for the work body.

(作 用) 上記構成によれば、制御手段は駆動モータを駆動制御し
て、スライド機構の移動位置を制御することにより、付
勢手段による作業体の作動部に加わる力を制御する。従
って、作業体の作動部は適応状況の変化に影響を受ける
ことなく一定の力が加わることとなり、各種適応状況に
応じた安定した動作制御が実現される。
(Function) According to the above configuration, the control means drives and controls the drive motor to control the movement position of the slide mechanism, thereby controlling the force applied to the operating portion of the work body by the urging means. Therefore, a constant force is applied to the operating portion of the work body without being affected by changes in the adaptation situation, and stable operation control corresponding to various adaptation situations is realized.

(実施例) 以下、この発明の実施例について、図面を参照して詳細
に説明する。
(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

第1図はこの発明の一実施例に係る作業体の力制御装置
を示すもので、作業体、例えばマニピュレータのアーム
10は複数の駆動モータ11を介して作動制御自在に設
けられる。そして、アーム10の先端に設けられるグリ
ッパ10aはスライド機構12を介して設けられる。こ
のスライド機構12は、例えば有底筒状の第1及び第2
の筒体12a、12bが軸方向に移動自在に設けられ、
このうち第1の筒体12aにはアーム10の基部が取付
けられ、他方の第2の筒体12bにはグリッパ10aが
取付けられる。そして、これら第1及び第2の筒体12
a、12bの内部にはばね部材13が収容されて、その
端部がそれぞれの内壁部に係着される。この第1及び第
2の筒体12a。
FIG. 1 shows a working body force control device according to an embodiment of the present invention, in which a working body, for example, an arm 10 of a manipulator, is provided so that its operation can be freely controlled via a plurality of drive motors 11. A gripper 10a provided at the tip of the arm 10 is provided via a slide mechanism 12. The slide mechanism 12 has, for example, first and second cylinders each having a bottomed cylindrical shape.
Cylindrical bodies 12a and 12b are provided movably in the axial direction,
The base of the arm 10 is attached to the first cylindrical body 12a, and the gripper 10a is attached to the other second cylindrical body 12b. These first and second cylindrical bodies 12
A spring member 13 is housed inside each of the spring members a and 12b, and its ends are secured to the respective inner walls. These first and second cylindrical bodies 12a.

12b内は相互間の位置が位置検出センサ14を介して
検出される。この位置検出センサ14の出力端は制御部
15の一方の入力端に接続され、この出力端には上記駆
動モータ11が接続される。
12b, mutual positions are detected via the position detection sensor 14. The output end of the position detection sensor 14 is connected to one input end of the control section 15, and the drive motor 11 is connected to this output end.

これにより、制御部15は、その入力した位置検出セン
サ14からの検出値と目標値に対応した駆動信号を生成
して駆動モータ11に出力する。
Thereby, the control unit 15 generates a drive signal corresponding to the input detection value from the position detection sensor 14 and the target value, and outputs it to the drive motor 11.

即ち、上記第1及び第2の筒体12a、12bはり。−
L、に一定長の変化が可能に構成され、位置検出センサ
14により位置変位二ΔLが検出される。そして、ばね
部材13はり。において、縮み二(ΔX−ΔL−0)と
設定され、その縮み二ΔXに応じて F−に−ΔX に相当する力をグリッパ10aを介して対象物に加える
。そして、制御部15は上記指令部(図示せず)からの
目標値F±ΔFが入力されているとすると、スライド機
構12の位置制御目標値X。
That is, the first and second cylindrical beams 12a and 12b. −
L, is configured to be able to change by a constant length, and the position detection sensor 14 detects the position displacement 2ΔL. And the spring member 13 beam. , the contraction 2 (ΔX-ΔL-0) is set, and in accordance with the contraction 2 ΔX, a force corresponding to -ΔX is applied to the object via the gripper 10a. If the control unit 15 receives the target value F±ΔF from the command unit (not shown), the control unit 15 determines the position control target value X of the slide mechanism 12.

±ΔX(XLL−X、  −ΔX s  X UL” 
X 1  +ΔX)を定めて、位置検出センサ14の出
力がX目、〜XULの範囲となるように駆動モータ11
を駆動制御してアーム10のグリッパ10aを作動制御
する。
±ΔX(XLL−X, −ΔX s X UL”
X 1 +ΔX) and drive the drive motor 11 so that the output of the position detection sensor 14 is in the range of
to control the operation of the gripper 10a of the arm 10.

上記構成により、例えば第2図に示すように宇宙ステー
ションのボディー上の亀裂等の発見作業等の凹凸状の対
象物16に対して一定の力Fで押圧しながら作業をおこ
う場合には、アーム1oのグリッパ10aに傷検出器1
7を装着して(第1図参照)、制御部15を介して駆動
モータ11を駆動して傷検出器17を対象物16に当接
させる。
With the above configuration, for example, as shown in FIG. 2, when working on an uneven object 16 while pressing with a constant force F, such as finding a crack or the like on the body of a space station, A flaw detector 1 is attached to the gripper 10a of the arm 1o.
7 (see FIG. 1), the drive motor 11 is driven via the control unit 15 to bring the flaw detector 17 into contact with the object 16.

すると、位置検出センサ14がスライド機構12のスラ
イド位置を検出して制御部15に出力する。
Then, the position detection sensor 14 detects the slide position of the slide mechanism 12 and outputs it to the control section 15.

ここで、制御部15には上記指令部(図示せず)からの
目標値に対応して、位置検出センサ14の出力が一定と
なるように駆動モータ11を駆動制御する。これにより
、アーム10のグリッパ10aはスライド機構12に付
与されるばね部材13のF−にΔXなる力が加えられた
状態で、傷検出器17を対象物16に当接させた状態を
保って所望の動作を続ける。
Here, the control section 15 controls the drive motor 11 so that the output of the position detection sensor 14 is constant in accordance with the target value from the command section (not shown). As a result, the gripper 10a of the arm 10 maintains the flaw detector 17 in contact with the object 16 while a force of ΔX is applied to F- of the spring member 13 applied to the slide mechanism 12. Continue the desired action.

このように、上記作業体の力制御装置は駆動モータ11
とアーム10のグリッパ10aとの間に該グリッパ10
aを軸方向に移動自在に支持するスライド機構12を設
けると共に、このスライド機構12の司る移動位置に応
じた付勢力をアーム10のグリッパ10aに加えるばね
部材13を設け、スライド機構12の移動位置を制御す
ることにより、グリッパ10aに加わる力を一定に制御
するように構成した。これによれば、アーム10のグリ
ッパ10aは対象物16に対して、該対象物16の当接
面の変化に対応して略一定の力で対象物16に当接する
ように制御されるため、適応状況に応じて安定した動作
制御が実現される。
In this way, the force control device for the workpiece is configured by the drive motor 11.
and the gripper 10a of the arm 10.
A slide mechanism 12 is provided to support the slide mechanism 12 so as to be movable in the axial direction, and a spring member 13 is provided to apply a biasing force to the gripper 10a of the arm 10 according to the movement position controlled by the slide mechanism 12. By controlling the gripper 10a, the force applied to the gripper 10a is controlled to be constant. According to this, the gripper 10a of the arm 10 is controlled to contact the object 16 with a substantially constant force in response to changes in the contact surface of the object 16. Stable motion control is achieved according to the adaptation situation.

なお、上記実施例では、アーム10に対して1個のスラ
イド機構12を設けて1軸回りを制御するように構成し
たが、これに限ることなく、第3図に示すように複数の
軸回りにスライド機構12をそれぞれ設け、各軸毎に制
御するように構成することも可能である。
In the above embodiment, one slide mechanism 12 is provided for the arm 10 to control around one axis, but the invention is not limited to this, and as shown in FIG. It is also possible to provide a slide mechanism 12 for each axis and to control each axis separately.

また、上記実施例では、作業体として宇宙用マニピュレ
ータに適用した場合で説明したが、これに限ることなく
、各種のロボットを含む作業体においても適用可能であ
る。
Further, in the above embodiment, the case where the work body is applied to a space manipulator has been described, but the present invention is not limited to this, and can be applied to work bodies including various robots.

よって、この発明は上記実施例に限ることなく、その他
、この発明の要旨を逸脱しない範囲で種々の変形を実施
し得ることは勿論のことである。
Therefore, it goes without saying that the present invention is not limited to the above embodiments, and that various modifications can be made without departing from the spirit of the invention.

[発明の効果〕 以上詳述したように、この発明によれば、簡易な構成で
、適応能力の向上を図り、各種適応状況において安定し
た動作制御を実現し得るようにした作業体の力制御装置
を提供することができる。
[Effects of the Invention] As detailed above, according to the present invention, force control of a work body is achieved with a simple configuration, improving adaptability, and realizing stable motion control in various adaptable situations. equipment can be provided.

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

第1図はこの発明の一実施例に係る作業体の力制御装置
を示す図、第2図は第1図の動作を説明するために示し
た図、第3図はこの発明の他の実施例を示す図、第4図
及び第5図は従来の力制御装置を示すブロック図である
。 10・・・アーム、10a・・・グリッパ 11・・・
駆動モータ、12・・・スライド機構s 12 a 。 12b・・・第1及び第2の筒体、13・・・ばね部材
、14・・・位置検出センサ、15・・・制御部、16
・・・対象物、17・・・傷検出器。 第1図 出願人代理人 弁理士 鈴江武彦
FIG. 1 is a diagram showing a force control device for a working body according to an embodiment of the present invention, FIG. 2 is a diagram shown to explain the operation of FIG. 1, and FIG. 3 is a diagram showing another embodiment of the present invention. By way of example, FIGS. 4 and 5 are block diagrams illustrating conventional force control devices. 10... Arm, 10a... Gripper 11...
Drive motor, 12...slide mechanism s 12 a. 12b... First and second cylindrical bodies, 13... Spring member, 14... Position detection sensor, 15... Control unit, 16
...Object, 17...Flaw detector. Figure 1 Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

【特許請求の範囲】 作業体を作動制御する複数の駆動モータと、前記作業体
に設けられる作動部と前記駆動モータとの間に介在され
、前記作動部を軸方向に移動自在に支持するスライド機
構と、 このスライド機構の司る移動位置に応じた付勢力を前記
作業体の作動部に付勢する付勢手段と、前記駆動モータ
を駆動制御して前記スライド機構の移動位置を制御し、
前記付勢手段の付勢力を制御する制御手段とを具備した
ことを特徴とする作業体の力制御装置。
[Scope of Claims] A plurality of drive motors that control the operation of a work body, and a slide that is interposed between an actuation part provided on the work body and the drive motor and supports the actuation part so as to be movable in an axial direction. a mechanism; a biasing means for biasing an actuating portion of the work body with a biasing force corresponding to a movement position controlled by the slide mechanism; and drive control of the drive motor to control the movement position of the slide mechanism;
A force control device for a work body, comprising: control means for controlling the urging force of the urging means.
JP23309790A 1990-09-05 1990-09-05 Power controller for working body Pending JPH04114214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23309790A JPH04114214A (en) 1990-09-05 1990-09-05 Power controller for working body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23309790A JPH04114214A (en) 1990-09-05 1990-09-05 Power controller for working body

Publications (1)

Publication Number Publication Date
JPH04114214A true JPH04114214A (en) 1992-04-15

Family

ID=16949735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23309790A Pending JPH04114214A (en) 1990-09-05 1990-09-05 Power controller for working body

Country Status (1)

Country Link
JP (1) JPH04114214A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006258574A (en) * 2005-03-16 2006-09-28 Railway Technical Res Inst Loading device and loading method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006258574A (en) * 2005-03-16 2006-09-28 Railway Technical Res Inst Loading device and loading method

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