The active involvement of the computer in the manufacturing process and the control of production is the basis for computer-aided manufacturing (CAM). Technological development has opened the way to more flexible shoo...
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The active involvement of the computer in the manufacturing process and the control of production is the basis for computer-aided manufacturing (CAM). Technological development has opened the way to more flexible shoofloor automation. The key for the successful introduction of the computer integrated manufacturing concepts (CIM) is the ability to react fast and flexible to all new demands from the market side. In this paper we discuss a method based on the OCCAM/Transputer parallel approach to deal with at least a part of the complex demands on the structure and operation of the manufacturing environment. We use the concept of decomposing a complex system into a number of sub-systems which react with each other. The whole system is decomposed twice: horizontally into a number of functionally equivalent subparts and vertically into various levels of abstraction, all within the unified OCCAM model. The result is a hierarchical net structure which consists of local intelligent islands at various logical levels, which autonomously work in parallel and interact with the components of the adjacent logical levels. Subject area: 4.1 Digital computercontrol Systems, 8.1 Automatic control in Manufacturing.
Although the recently developed reduced instruction set computer (RISC) architecture has proven to offer impressive performance in general applications, it has its drawbacks in the field of multitasking real-time envi...
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Although the recently developed reduced instruction set computer (RISC) architecture has proven to offer impressive performance in general applications, it has its drawbacks in the field of multitasking real-time environments. The difficulties are mainly related to the large number of processor registers which must be saved and restored on every context switch. On the other hand, since this large number of registers accounts for most of the performance benefits, a concept had to be developed which preserves the advantages of the RISC architecture and provides for the necessary real-time capabilities. This paper describes a solution in which additional hardware performs a part of the save/restore task associated with every context switch. This approach yields a RISC architecture suited for the requirements of a modern processcontrol system. Subject area. 4.1 Digital computercontrol Systems
The authors present a program packaqe prepared for a personal computer of 64 kbytes. The program package is suitable for processing of measurement data, identification of control systems, design of controllers and sim...
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The authors present a program packaqe prepared for a personal computer of 64 kbytes. The program package is suitable for processing of measurement data, identification of control systems, design of controllers and simulation. The console communication is interactive and plotting is graphic on both the screen and the printer. Time series data are stored in files and the appropriate programs write in and read from the files. The operation of the programs is illustrated by examples.
The equations of motion for a robotic manipulator are a very lengthy and complicated set of nonlinear, highly coupled differential equations. A simplified model that reveals the dominant dynamics would be valuable for...
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The equations of motion for a robotic manipulator are a very lengthy and complicated set of nonlinear, highly coupled differential equations. A simplified model that reveals the dominant dynamics would be valuable for purposes of utilizing modern control theory. In this work, a method is presented for obtaining a reduced model for a nonlinear system. The structure of the simplified model is assembled from a library of the nonlinear basis terms that were present in the original model. This p-term structure is selected from the library in p-stages using a recently developed optimization scheme based on projection matrices and conjugate direction ideas. The algorithm is used to identify the dominant dynamics of several robot manipulator models and the results are verified on the GCA P300V robot in RPI's Robotics and Automation Laboratory.
作者：
DUNIETZ, ISHSU, JLCMCEACHERN, MTSTOCKING, JHSWARTZ, MATROMBLY, RMThe authors
Irwin S. Dunietz John L.C. Hsu Michael T. McEachern James H. Stocking Mark A. Swartz andRodney M. Tromblyare responsible for design and development of the Manufacturing Process Control System. Mr. Dunietz joined AT&T in 1980. He is a member of the technical staff in the Manufacturing Information Automation department at AT&T Engineering Research Center Princeton New Jersey. He received an A.B. in mathematics from Cornell University and an M.S.E. in computer science from Princeton University. Mr. Hsu who joined AT&T in 1970 is a department head in the Manufacturing Information Automation department at the Engineering Research Center. He received an M.S. in electrical engineering from the University of Missouri. Mr. McEachern joined AT&T in 1962 and is a supervisor in the 5ESS™ Line Unit Manufacturing department at AT&T Technologies in Oklahoma City Oklahoma. He is responsible for the manufacturing process control center in Oklahoma City which provides computerized support for all circuit pack manufacturing. Mr. Stocking who joined AT&T in 1975 is a supervisor in the Manufacturing Information Automation department at the Engineering Research Center. He received a B.S. in chemical engineering from Rensselaer Polytechnic Institute and a Ph.D. in chemical engineering from the University of California Berkeley. Mr. Swartz joined AT&T in 1980 and is a member of the technical staff in the Manufacturing Information Automation department at the Engineering Research Center. He received an A.B. in computer science from Cornell University and an M.S. in computer science from Rutgers—The State University. Mr. Trombly who joined AT&T in 19 78 is an assistant manager at the AT&T Merrimack Valley Works in Massachusetts. Previously he was a supervisor at the Engineering Research Center. He holds a B.S. in computers and systems engineering and an M.S.E.E. from Rensselaer Polytechnic Institute.
The central challenge of all manufacturing is making products to the right standards and delivering them at the right time. AT&T is upgrading its corporate and factory resource planning systems to improve control ...
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The central challenge of all manufacturing is making products to the right standards and delivering them at the right time. AT&T is upgrading its corporate and factory resource planning systems to improve control of day-to-day manufacturing. The Manufacturing processcontrol System (MPCS), developed at the AT&T Engineering Research Center (ERC), provides this support. MPCS connects the shop floor with production scheduling, accounting, product data archive, and engineering support systems.
The paper describes the design conception of an industrial multiloop adaptive regulator and the practical approach of the implementation of a highly reliable adaptive control strategy.
The paper describes the design conception of an industrial multiloop adaptive regulator and the practical approach of the implementation of a highly reliable adaptive control strategy.
Some new self-tuning control algorithms are presented here based on nonparamet-ric system description. An appropriate truncation of the model offers suboptimal control law avoiding the inverse instability and ensuring...
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Some new self-tuning control algorithms are presented here based on nonparamet-ric system description. An appropriate truncation of the model offers suboptimal control law avoiding the inverse instability and ensuring robust behaviour for the control system. The self-tuning control was realized on a microcomputer developing system connected to an analogue model via an I/O card. Examples illustrating the behaviour of the control algorithms are also presented
The paper presents an adaptive Smith predictor. The algorithm is a combination of a RLS parameter estimation and the Smith predictor. For time-delay estimation two techniques are suggested: the Kurz's algorithm an...
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The paper presents an adaptive Smith predictor. The algorithm is a combination of a RLS parameter estimation and the Smith predictor. For time-delay estimation two techniques are suggested: the Kurz's algorithm and a simple method proposed in this study. The performance of the adaptive Smith predictor control is illustrated by simulation examples. The time responses of an adaptive FID and the adaptive Smith control are demonstrated as well.
The paper presents a recursive parameter estimation and the associated structure estimation method using El ementary S ubSystem (ESS) representation of S1S0 systems. Besides the ability of estimating the structure and...
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The paper presents a recursive parameter estimation and the associated structure estimation method using El ementary S ubSystem (ESS) representation of S1S0 systems. Besides the ability of estimating the structure and tracking time-varying parameters, the elaborated procedure can also be applied to track time-varying structures. The proposed method is illustrated by simulation examples.
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