EPE Association: EPE-PEMC 2000 - Topic 10c: Mechatronic Systems

EPE-PEMC 2000 - Topic 10c: Mechatronic Systems
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 10: Mechatronic Systems > EPE-PEMC 2000 - Topic 10c: Mechatronic Systems

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   Adaptive Multipass Thick Plate Welding Based on an Intelligent Laser-stripe Sensor
By Horber H., Haug K., Pritschow G. [View]
[Download]

Abstract: For the automation of multipass welding processes few optical sensors are used because of the heavy distortions caused by the welding arc and the strongly varying geometry of the welding groove. A new intelligent sensor head with an integrated processing unit is able to reduce the distortions and reduce the data in real time. Fast programmable hardware units are able to do the pre-processing. The reduced data showing the height profile of the welding groove are transmitted to a PC. By the use of further distortion filters and fuzzy algorithms characteristic features of the groove are extracted form the height profile. These features are necessary for calculating geometry attributes of the welding groove. These attributes are the input of a model for the adaptation of the welding parameters. To build this model several sources have to be used. There are many sources to build this model and the generation is very time-consuming, therefore an adapting of the model during welding will be feasible. Correcting the automatic welding process by an experienced welder the model can be adapted. After the putting into operation phase the model adapts itself by scanning the seam after welding.

   Advantage of Electric Motor for Anti Skid Control of Electric Vehicle
By Sakai S., Hori Y. [View]
[Download]

Abstract: Electric vehicles (EVs)are driven by motors,which is an excellent actuator for motion control compared to combustion engines or hydraulic braking systems.One principal advantage of motor is its fast and precise torque response.Thus,the fast feedback control can be applied in EVs.In this paper,such fast feedback control with motor is applied for anti skid control.Some experimental results show the anti skid e .ect of motor feedback controller,which attempts to increase the equivalent wheel inertia.Then the in .uence of actuator 's response delay is evaluated,resulting that such feedback control is di .cult with slow actuator like hydraulic braking system.These discussions indicate the advantages of motor,however,the actual braking systems in most EVs and hybrid EVs (HEVs)are not pure electric ones at this moment.Therefore,regenerative braking control cooperating with hydraulic braking is also proposed and discussed.It reduces the braking distance by 20%in the simulations.

   An Efficient Production Planning Algorithm for Multi-head Surface Mounting Machine Using the Immune Algorithm
By Lee Y.D., Lee W.S.*, Kim K.H. [View]
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Abstract: The biological immune algorithm (BIA) is based on the immune system of human biology. Our objective is to minimise the PCB assembly time on the multi-head surface-mounting machine. Unlike convention approaches, which have dealt with reel assignment and pick-and-place sequencing problems separately, we considered them concurrently and did not specify the number of heads. First, the proposed partial-link BIA method is applied to the single-head case and then it is extended to multi-head case by regarding a reel-group as one reel and a component-cluster as one component. Computer simulation results show that the proposed method is superior to the heuristic algorithm currently in use in industry.

   Hierarchical Control System Model of Composed Process and Object in Fiber Cement Plant
By Maleševiæ L., Beroš S.*, Mateljan I.* [View]
[Download]

Abstract: The paper deals with research and realization of a control system model for the class of systems where composed process and object make an operating entirety. Decentralized control units make control structure. Internal interconnections are very intensive. Therefore we are concerned with hierarchical control structure composed of local decision units, and supreme control (coordinator). Such class of systems is studied on the example of the real plant for forming various fiber cement shapes. On the basis of the developed process and object model, simulating all disturbances expected in the real system, control system model is tested and verified.

   Multi-Sensor Grinding Machine for Investigating Grinding Performance
By Simpson J.W.L., Cook C.D., Li Z. [View]
[Download]

Abstract: A grinding machine has been developed for monitoring and control of the grinding process. Servo controllers are applied for control of the feedrate. Piezo electric force sensors and spindle wheel power measurement systems have also been installed allowing the measurement of tangential and normal grinding forces. Several experimental results are given showing the relationship between normal and tangential grinding forces, metal removal rates and spindle motor power.

   Vector Field Based Guiding Model for Mobile Robots as An Intelligent Transportation System
By Nagy I., Baranyi P., Greguss P., Korondi P., Hashimoto H.* [View]
[Download]

Abstract: The main motivation of the present approach is to develop an autonomous robot transportation system in an intelligent building. The robots might have higher or lower priority depending on their roles; therefore they should travel in pre-defined guiding styles. The artificial potential field method is introduced as a generalised guiding style model, but an extended version of this model is also presented (the vector field model), which overcomes some of the limitations of the potential based model. The extended forms can be approximated by a common type neuro-fuzzy algorithm, which is introduced as well as a simple training method for both the original and the extended models. A sensor system is also presented which can be used as a range detector to detect objects and their distances.

EPE-PEMC 2000 - Topic 10c: Mechatronic Systems
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 10: Mechatronic Systems > EPE-PEMC 2000 - Topic 10c: Mechatronic Systems
	[return to parent folder]

	Adaptive Multipass Thick Plate Welding Based on an Intelligent Laser-stripe Sensor By Horber H., Haug K., Pritschow G.	[View] [Download]
Abstract: For the automation of multipass welding processes few optical sensors are used because of the heavy distortions caused by the welding arc and the strongly varying geometry of the welding groove. A new intelligent sensor head with an integrated processing unit is able to reduce the distortions and reduce the data in real time. Fast programmable hardware units are able to do the pre-processing. The reduced data showing the height profile of the welding groove are transmitted to a PC. By the use of further distortion filters and fuzzy algorithms characteristic features of the groove are extracted form the height profile. These features are necessary for calculating geometry attributes of the welding groove. These attributes are the input of a model for the adaptation of the welding parameters. To build this model several sources have to be used. There are many sources to build this model and the generation is very time-consuming, therefore an adapting of the model during welding will be feasible. Correcting the automatic welding process by an experienced welder the model can be adapted. After the putting into operation phase the model adapts itself by scanning the seam after welding.

	Advantage of Electric Motor for Anti Skid Control of Electric Vehicle By Sakai S., Hori Y.	[View] [Download]
Abstract: Electric vehicles (EVs)are driven by motors,which is an excellent actuator for motion control compared to combustion engines or hydraulic braking systems.One principal advantage of motor is its fast and precise torque response.Thus,the fast feedback control can be applied in EVs.In this paper,such fast feedback control with motor is applied for anti skid control.Some experimental results show the anti skid e .ect of motor feedback controller,which attempts to increase the equivalent wheel inertia.Then the in .uence of actuator 's response delay is evaluated,resulting that such feedback control is di .cult with slow actuator like hydraulic braking system.These discussions indicate the advantages of motor,however,the actual braking systems in most EVs and hybrid EVs (HEVs)are not pure electric ones at this moment.Therefore,regenerative braking control cooperating with hydraulic braking is also proposed and discussed.It reduces the braking distance by 20%in the simulations.

	An Efficient Production Planning Algorithm for Multi-head Surface Mounting Machine Using the Immune Algorithm By Lee Y.D., Lee W.S., Kim K.H.*	[View] [Download]
Abstract: The biological immune algorithm (BIA) is based on the immune system of human biology. Our objective is to minimise the PCB assembly time on the multi-head surface-mounting machine. Unlike convention approaches, which have dealt with reel assignment and pick-and-place sequencing problems separately, we considered them concurrently and did not specify the number of heads. First, the proposed partial-link BIA method is applied to the single-head case and then it is extended to multi-head case by regarding a reel-group as one reel and a component-cluster as one component. Computer simulation results show that the proposed method is superior to the heuristic algorithm currently in use in industry.

	Hierarchical Control System Model of Composed Process and Object in Fiber Cement Plant By Maleševiæ L., Beroš S., Mateljan I.	[View] [Download]
Abstract: The paper deals with research and realization of a control system model for the class of systems where composed process and object make an operating entirety. Decentralized control units make control structure. Internal interconnections are very intensive. Therefore we are concerned with hierarchical control structure composed of local decision units, and supreme control (coordinator). Such class of systems is studied on the example of the real plant for forming various fiber cement shapes. On the basis of the developed process and object model, simulating all disturbances expected in the real system, control system model is tested and verified.

	Multi-Sensor Grinding Machine for Investigating Grinding Performance By Simpson J.W.L., Cook C.D., Li Z.	[View] [Download]
Abstract: A grinding machine has been developed for monitoring and control of the grinding process. Servo controllers are applied for control of the feedrate. Piezo electric force sensors and spindle wheel power measurement systems have also been installed allowing the measurement of tangential and normal grinding forces. Several experimental results are given showing the relationship between normal and tangential grinding forces, metal removal rates and spindle motor power.

	Vector Field Based Guiding Model for Mobile Robots as An Intelligent Transportation System By Nagy I., Baranyi P., Greguss P., Korondi P., Hashimoto H.*	[View] [Download]
Abstract: The main motivation of the present approach is to develop an autonomous robot transportation system in an intelligent building. The robots might have higher or lower priority depending on their roles; therefore they should travel in pre-defined guiding styles. The artificial potential field method is introduced as a generalised guiding style model, but an extended version of this model is also presented (the vector field model), which overcomes some of the limitations of the potential based model. The extended forms can be approximated by a common type neuro-fuzzy algorithm, which is introduced as well as a simple training method for both the original and the extended models. A sensor system is also presented which can be used as a range detector to detect objects and their distances.