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1. WO2000043843 - FEEDBACK CONTROL METHOD AND DEVICE

Publication Number WO/2000/043843
Publication Date 27.07.2000
International Application No. PCT/JP1999/000187
International Filing Date 20.01.1999
IPC
G05B 5/01 2006.01
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
5Anti-hunting arrangements
01electric
G05B 19/404 2006.01
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
19Programme-control systems
02electric
18Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
404characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
CPC
G05B 19/404
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
19Programme-control systems
02electric
18Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
404characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
G05B 5/01
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
5Anti-hunting arrangements
01electric
Applicants
  • MITSUBISHI DENKI KABUSHIKI KAISHA [JP/JP]; 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8310, JP (AllExceptUS)
  • SAKURAI, Hisao [JP/JP]; JP (UsOnly)
Inventors
  • SAKURAI, Hisao; JP
Agents
  • SAKAI, Hiroaki; Tokyo Club Building 2-6, Kasumigaseki 3-chome Chiyoda-ku Tokyo 100-0013, JP
Priority Data
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) FEEDBACK CONTROL METHOD AND DEVICE
(FR) PROCEDE DE REGULATION A CONTRE-REACTION ET DISPOSITIF ASSOCIE
Abstract
(EN)
A feedback control for setting deviations to zero, wherein a controlled object is controlled by a plurality of actuators, different deviation threshold values are set for respective actuators, actuators having deviations exceeding relative deviation threshold values only are operated by driving on comparison between deviations and relative deviation threshold values, and the number of actuators to be operated by driving is determined according to the magnitudes of deviations. A minimum drive time is set for each actuator so that an actuator, once driven, is kept on driving for a minimum drive time even if a deviation is not larger than a deviation threshold value of a relative actuator, whereby a hunting phenomenon is prevented.
(FR)
La présente invention concerne un procédé de régulation à contre-réaction, destiné à annuler des déviations, dans lequel un objet est commandé au moyen d'une pluralité d'actionneurs. Ce procédé consiste à fixer différentes valeurs de seuil de déviation pour chaque actionneur, seuls les actionneurs présentant des déviations excédant les valeurs relatives de seuil de déviation étant mis en fonctionnement par comparaison entre les déviations et les valeurs relatives de seuil de déviation, et à déterminer le nombre d'actionneurs mis en fonctionnement selon les grandeurs des déviations. Un temps minimum de fonctionnement est fixé pour chaque actionneur de manière à ce qu'un actionneur, une fois en fonctionnement, soit maintenu dans cet état pendant une durée minimale même si une déviation est inférieure à une valeur de seuil de déviation d'un actionneur relatif, ce qui permet d'éviter un phénomène de pompage.
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