摘要:

A system is described for enhancing the performance of an image processing framestore. It uses the Texas Instruments TMS32010 digital signal processor, and combines the virtues of fast execution time and ease of programmability, while in no way interfering with the ability of the host computer itself to access image data held in the framestore. Hardware and software aspects of the implementation are discussed, and the improvements in execution time obtained are described.

ISSN:1744-683X    

DOI:10.1049/sm.1985.0026

出版商:IEE    

年代:1985

数据来源: IET

摘要:

Structures and algorithms for implementation of digital filters are described which enable highperformance controllers using 8 bit microprocessors to be designed. Using these techniques a typical controller for an electromechanical system incorporating two feedback signals, a phase advance compensator, a notch filter and a proportional-plus-integral term can operate at up to 750 Hz sampling frequency. The paper summarises the development of the structure for the digital filters within the controller, describes the number format for the variables and coefficients, and outlines the software techniques employed to facilitate particular controller implementations.

ISSN:1744-683X    

DOI:10.1049/sm.1985.0028

出版商:IEE    

年代:1985

数据来源: IET

摘要:

The design of an efficient and cost-effective software system for a process control workstation is presented. The workstation can operate either in stand-alone mode or as a control module in a distributed control hierarchy. Among its key features is a user-friendly operator interface allowing dynamic and menu-driven definition of all system parameters.

ISSN:1744-683X    

DOI:10.1049/sm.1985.0029

出版商:IEE    

年代:1985

数据来源: IET

摘要:

The paper studies two implementations of an observer-based output feedback controller designed to control a third-order single-input single-output linear plant. The first controller is a direct implementation of the observer equations, requiring two inputs. The second controller is an equivalent cascade version of the observer-based controller, requiring only one input. The cancellation of the observer poles which appear as common factors in the numerator and denominator of the cascade controller transfer function yields annth-order controller. The plant is simulated on an EAI 680 analogue computer and the controllers are implemented digitally on an Intel 2920 microprocessor in the feedback loop and forward loop, respectively. The performances of the two digital controllers are compared.

ISSN:1744-683X    

DOI:10.1049/sm.1985.0032

出版商:IEE    

年代:1985

数据来源: IET

摘要:

A binary decision controller is a programmable logic device whose use falls between that of hard-wired logic and microcomputer controllers. The paper explores the use of this type of controller for a number of simple tasks.

ISSN:1744-683X    

DOI:10.1049/sm.1985.0033

出版商:IEE    

年代:1985

数据来源: IET

摘要:

The paper describes the initial stages and immediate aims of an engineering project to control a tyre tread production line. The line is part of the Avon Tyres pic plant at Melksham, Wiltshire. The paper specifically describes the modelling, automatic control, hardware and software developments that are (and will be) used as a basis for the continuation of the project. Ultimately, the technology developed and expertise gained on the project will be extended to the control of other plants within the Avon group.

ISSN:1744-683X    

DOI:10.1049/sm.1985.0034

出版商:IEE    

年代:1985

数据来源: IET