Showing papers on "Mechatronics published in 1989"

Modern manufacturing process engineering

Abstract: Modern manufacturing process engineering , Modern manufacturing process engineering , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

The Safety Assessment of Human-Robot Systems : Architectonic Principles of Hazard-Control Systems

Abstract: As robotics consists of overall engineering systems, it is necessary for the improvement of robot safety that a systematic plan be executed. The examination and designing of safety measures is an important stage of the safety plan. It is essential to establish a systematic methodology for planning and designing safety measures for the effective practice of this stage in individual systems. first, the hazard-restraint process is generalized as four hazard-restraint principles, based on the A-C model hazard-production theory. Next, the architectonics of the final defense line of the hazard-restraint process is established in terms of a dissociation of action linkage by a hazard-control system. Last, the architecture of the hazard-control systems is demonstrated by examples for systems involving a robot following its course, rescue robot, or surgery robot, and the applicability of safety confirmation sensors or controllers is defined clearly.

Vacuum mechatronics and self-contained manufacturing for microelectronics processing

Abstract: The Center for Robotic Systems in Microelectronics (CRSM) has developed the core of a self-contained automated robotic factory (SCARF). This includes a central chamber with various transfer and monitoring ports, a vacuum-compatible robot for wafer transfer, and a particle monitoring system, all under automation. The cylindrical coordinate SCARF vacuum-compatible robot is unique due to its fully vacuum-compatible motors, closed-loop control, and configuration which makes it an ideal central component for a self contained manufacturing system. The CRSM is currently developing a color vision system for in-vacuum inspection and measurement which will be an integral part of SCARF. Details of the SCARF system and robot are discussed, as well as the key technical issues facing the development of self-contained manufacturing systems. >

Decentralized vibration absorption of industrial robots by a new mechatronics concept

Abstract: The majority of industrial robots (IR) on the market is too heavy und therefore too slow in order to comply with the demands of many advanced manufacturing applications. The efficient introduction of innovative lightweight materials, gearless direct-drive motors and highly integrated intelligent sensors being more and more available on the market demands necessarily integrated mechatronics concepts which provide an overall optimization both of the IR mechanics and the control electronics. In this paper a new mechatronics concept for the decentralized control of higher frequency structural oscillations of the IR mechanics will be presented. Applied to a Cartesian precision robot different model and control approaches will be discussed and simulated assuming practice near conditions.

Engineering feature description in mechanical engineering design

Abstract: Although geometric modelling packages have advantages over simple drafting systems, the needs of the engineering designer are such that further improvements in the user interface of modern CAD systems are required. This paper proposes a user interface based on engineering description, in which the component shapes and other attributes are described as a collection of manufacturing-related features. Definitions of a feature are given from both the user and geometric view. The role of feature description in integrated CAE systems is considered in relation to the automatic transfer of information to manufacturing software.

Objectoriented control engineering tool system

Abstract: In this paper a control engineering tool system currently under development at the Robert Bosch GmbH Central Research Laboratory is presented. It combines all tools necessary to support modelling, design and implementation of control systems. Resigned as an integrated system it avoids current problems of incompatible dataformats, different userinterfaces and a variety of command languages. Special features are a blockoriented representation of models and design methods, a graphical userinterface and realtime simulation capabilities. A hierarchical modelling approach allows breaking down complex systems into managable components. The userinterface is written in SMALLTALK, a language based on the objectoriented paradigm. Its windowing features support editing blockdiagrams, handling databases and controlling realtime simulation interactively. A configurable network of Transputer5 provides sufficient Computing power and communication bandwidth to simulate large problems in realtime. -

Position control of industrial robots — impacts, concepts and results

Abstract: In the area of robot control research a large number of sophisticated control algorithms have been developed within the last two decades which can provide almost perfect results in simulation or under laboratory conditions. However, the vast majority of commercial IR systems prefer rather simple concepts which have their origin in the CNC technique. The main reason for the main acceptance of research results is the poor cost-benefit ratio with respect to the most manufacturing applications. There are two prospective approaches to improve considerably this acceptance index which have arisen just in recent years. (1) Robust control concepts considering the conditions of implementation, service and operation within a crude industrial environment. (2) Mechatronics concepts for integrated overall design of electronics and mechanics. The objectives of this contribution are both to summarize the present state of IR control research and industrial practice and to outline on going research efforts at the Fraunhofer-Institute IITB concerning (1) and (2).

A Development of Courseware 'MCTS' for Mechatronics Control Education

Abstract: In order to cope with the growing demand for mechatronics engineers, mechatronics-CAD/CAM Laboratory of Toyohashi University of Technology has been providing mechatronics engineering education since 1980. After implementing an original course arrangement, an effectiveness of the education method has been carefully evaluated. Based on this evaluation and the concept of mechatronics engineering, 'mechatronics control' has been recognized as the most important part of mechatronics engineering. For efficient education for the mechatronics control, the courseware which consists of hardware and software so-called MCTS (Mechatronics Control Training System) has been developed and implemented in the real classroom environment. The education using this MCTS has been found to be effective as a result of the evaluation.

Present Status and trend of Mechanoelectrical Technology in Information Processing Machinery

Abstract: This review describes the present status, features and trend of mechanoelectrical technology in information processing machinery, which is called "mechatronics" in Japan. In information processing machinery, such as storage and output devices, the transformation between spatially allocated recording data and time series electrical data is performed by a mechanical motion of a body with mass. The performance of such devices depends on the speed and precision of the mechanical motion. The key mechanism to realize high-speed and precise motion is here generally called "positioning/tracking mechanism"; it is further subdivided into four key mechanisms: the "motion positioning mechanism", "constant speed mechanism", "positioning mechanism" and "tracking mechanism". Their present levels of performance and basic design method are described. Explanation of current important problems and leading research related to these four key mechanisms and mechanical motion is also given. In the evolution of mechatronics in data processing machinery, miniaturization is an essential trend. Since this miniaturization results in a decrease in the signal-to-noise ratio of the mechanical motion, the reduction of uncontrolled vibration modes, friction force and wear is becoming more and more important, as the mechatronics evolves into micromechatronics.

Model-aided techniques for creative mechatronics designs

Abstract: The authors present the experience gained in establishing and running the Projects Laboratory in the Mechanical Engineering Department of Qatar University, which was planned to not only provide facilities for identification of elements and components encountered in mechanical engineering, but also to provide means of enhancing creative work. Numerous examples of mechanical systems associated with electrical and electronic devices that can be constructed by means of modular units are displayed. Modular-component kits are described that are appropriate for constructing various basic modules that can be added together to set up a useful model. Hands-on experience in using some of these kits is reported. The approach used to motivate students with a view to enhancing their creative capabilities is then described. Some case studies are included. >