The Experts below are selected from a list of 64059 Experts worldwide ranked by ideXlab platform
Zdenek Hanzalek - One of the best experts on this subject based on the ideXlab platform.
-
Profinet IO IRT Message Scheduling With Temporal Constraints
IEEE Transactions on Industrial Informatics, 2010Co-Authors: Zdenek Hanzalek, Pavel Burget, Přemysl ŠůchaAbstract:This paper presents an algorithm that allows one to create a static schedule of the Profinet IO IRT (Isochronous Real Time) communication, which is an industrial Ethernet protocol standardized in IEC 61158. This algorithm offers an alternative to the available commercial tool, providing comparable results with respect to the resulting schedule makespan. Furthermore, the problem is extended by useful temporal constraints (i.e., release dates, deadlines and end-to-end deadlines of the messages) providing a greater flexibility with respect to the individual messages. Due to this flexibility, it is possible to place the selected messages in various parts of the communication cycle (in order to increase the computational time available for the Main-Controller application, or to retransmit the synchronization message without holdup in the switch, or to add new messages into the original schedule). The solution is based on a formulation of the Profinet IO IRT scheduling problem in terms of the Resource Constrained Project Scheduling with Temporal Constraints.
-
Profinet IO IRT Message Scheduling
2009 21st Euromicro Conference on Real-Time Systems, 2009Co-Authors: Zdenek Hanzalek, Pavel Burget, Premysl ŠuchaAbstract:This paper presents an algorithm that allows one to create a static schedule of the Profinet IO IRT communication, which is an industrial Ethernet protocol standardised in IEC 61158. This algorithm offers an alternative to the available commercial tool, providing comparable results regarding the resulting time schedule length. Furthermore, we extend the problem by useful time constraints providing a greater flexibility with respect to the individual messages. Due to this flexibility, it is possible to place the selected messages in various parts of the communication cycle, to define end-to-end delays, or to increase the computational time available for the Main-Controller application, for example. The solution is based on a formulation of the Profinet IO IRT scheduling problem in terms of the resource constrained project scheduling with temporal constraints (PS|temp|Cmax).
Premysl Šucha - One of the best experts on this subject based on the ideXlab platform.
-
Profinet IO IRT Message Scheduling
2009 21st Euromicro Conference on Real-Time Systems, 2009Co-Authors: Zdenek Hanzalek, Pavel Burget, Premysl ŠuchaAbstract:This paper presents an algorithm that allows one to create a static schedule of the Profinet IO IRT communication, which is an industrial Ethernet protocol standardised in IEC 61158. This algorithm offers an alternative to the available commercial tool, providing comparable results regarding the resulting time schedule length. Furthermore, we extend the problem by useful time constraints providing a greater flexibility with respect to the individual messages. Due to this flexibility, it is possible to place the selected messages in various parts of the communication cycle, to define end-to-end delays, or to increase the computational time available for the Main-Controller application, for example. The solution is based on a formulation of the Profinet IO IRT scheduling problem in terms of the resource constrained project scheduling with temporal constraints (PS|temp|Cmax).
Přemysl Šůcha - One of the best experts on this subject based on the ideXlab platform.
-
Profinet IO IRT Message Scheduling With Temporal Constraints
IEEE Transactions on Industrial Informatics, 2010Co-Authors: Zdenek Hanzalek, Pavel Burget, Přemysl ŠůchaAbstract:This paper presents an algorithm that allows one to create a static schedule of the Profinet IO IRT (Isochronous Real Time) communication, which is an industrial Ethernet protocol standardized in IEC 61158. This algorithm offers an alternative to the available commercial tool, providing comparable results with respect to the resulting schedule makespan. Furthermore, the problem is extended by useful temporal constraints (i.e., release dates, deadlines and end-to-end deadlines of the messages) providing a greater flexibility with respect to the individual messages. Due to this flexibility, it is possible to place the selected messages in various parts of the communication cycle (in order to increase the computational time available for the Main-Controller application, or to retransmit the synchronization message without holdup in the switch, or to add new messages into the original schedule). The solution is based on a formulation of the Profinet IO IRT scheduling problem in terms of the Resource Constrained Project Scheduling with Temporal Constraints.
Pavel Burget - One of the best experts on this subject based on the ideXlab platform.
-
Profinet IO IRT Message Scheduling With Temporal Constraints
IEEE Transactions on Industrial Informatics, 2010Co-Authors: Zdenek Hanzalek, Pavel Burget, Přemysl ŠůchaAbstract:This paper presents an algorithm that allows one to create a static schedule of the Profinet IO IRT (Isochronous Real Time) communication, which is an industrial Ethernet protocol standardized in IEC 61158. This algorithm offers an alternative to the available commercial tool, providing comparable results with respect to the resulting schedule makespan. Furthermore, the problem is extended by useful temporal constraints (i.e., release dates, deadlines and end-to-end deadlines of the messages) providing a greater flexibility with respect to the individual messages. Due to this flexibility, it is possible to place the selected messages in various parts of the communication cycle (in order to increase the computational time available for the Main-Controller application, or to retransmit the synchronization message without holdup in the switch, or to add new messages into the original schedule). The solution is based on a formulation of the Profinet IO IRT scheduling problem in terms of the Resource Constrained Project Scheduling with Temporal Constraints.
-
Profinet IO IRT Message Scheduling
2009 21st Euromicro Conference on Real-Time Systems, 2009Co-Authors: Zdenek Hanzalek, Pavel Burget, Premysl ŠuchaAbstract:This paper presents an algorithm that allows one to create a static schedule of the Profinet IO IRT communication, which is an industrial Ethernet protocol standardised in IEC 61158. This algorithm offers an alternative to the available commercial tool, providing comparable results regarding the resulting time schedule length. Furthermore, we extend the problem by useful time constraints providing a greater flexibility with respect to the individual messages. Due to this flexibility, it is possible to place the selected messages in various parts of the communication cycle, to define end-to-end delays, or to increase the computational time available for the Main-Controller application, for example. The solution is based on a formulation of the Profinet IO IRT scheduling problem in terms of the resource constrained project scheduling with temporal constraints (PS|temp|Cmax).
Donghun Lee - One of the best experts on this subject based on the ideXlab platform.
-
Development of a mobile welding robot for double-hull structures in shipbuilding
Journal of Marine Science and Technology, 2010Co-Authors: Ju-hwan Cha, Kyuyeul Lee, Taewan Kim, Jongwon Kim, Donghun LeeAbstract:This paper describes the development of a self-driving mobile welding robot. The robot is used to weld U-shaped welding areas in enclosed double-hull structures. In order to place itself inside the double-hull structure, the robot is capable of passing through an access hole 600 mm wide and 800 mm high. This research addresses the mechanical and control systems of the robot. The mechanical system of the robot consists of an eight-axis mobile platform, and a six-axis welding unit. The control system consists of a Main Controller, a welding machine Controller (arc sensor board), and seam tracking sensors, i.e., a touch sensor, a laser sensor, and an arc sensor. To reduce the number of cables that would be dragged by the welding robot, the Main Controller is designed as an embedded type that is mounted on the back of the mobile platform.
