Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent
1985-01-16
1987-01-20
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
318568, 364184, G05B 2302, G05B 1900
Patent
active
046382275
ABSTRACT:
In order to execute a series of moving sequences by synchronous and exclusive control of unit operations taught or programed in advance, there are provided a first storing of the relationship of the sequence of execution of each unit operation to other unit operations to be controlled synchronously or exclusively; a second storing of information relating to the operational status of each unit operation; and a third storing of operating instructions for executing each unit operation. When machine tools have stopped due to the occurrence of an abnormality while a series of unit operations are being executed by the operating instructions stored in the third storing means, a unit operation for restarting on the basis of the relationship of the executing sequence stored during the first storing is appointed, and information concerning the operational status stored during the second storing is corrected. Furthermore, at the time when a junction operation in which there exist two or more sequences leading to a unit operation has been executed, a fourth storing is effected during the normal state of the operation steps relating to that execution. Then the content of the information stored during said second storing is corrected to a state permitting restarting from an appointed unit operation by referring to information stored during the fourth storing.
REFERENCES:
patent: 3802622 (1974-04-01), Nishimura
patent: 3889105 (1975-06-01), Schneekloth
patent: 4163930 (1979-08-01), Lachaussee
patent: 4347578 (1982-08-01), Inaba
patent: 4379335 (1983-04-01), Kirsch
patent: 4471279 (1984-09-01), Inaba
patent: 4490660 (1984-12-01), Tsuchihashi
patent: 4496889 (1985-01-01), Fukuyama
patent: 4550378 (1985-10-01), Nozawa
Masuda, Ryosuke and Kensuke Hasegawa, "Mark Flow Graph and Its Application to Complex Sequential Control System", Report #1115, 13th Hawaii Int. Conference on System Sciences, vol. 1, 1980, pp. 194-203.
Murata, Tomohiro and Norihasa Komoda et al., "A Petri-Net Based FA Controller for Flexible and Maintainable Control Specifications", Report #1314, IECON, 1984, pp. 362-366.
Katayama Masanori
Kera Kazuo
Komoda Norihisa
Murata Tomohiro
Hitachi , Ltd.
Keane Patrick C.
Shoop Jr. William M.
LandOfFree
Method and apparatus for recovering normality in moving sequence does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for recovering normality in moving sequence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for recovering normality in moving sequence will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2136719