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- Duffie, N., et al.
(author)
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Development of a Menu-Driven Programmable System of Machinery Drives
- 1983
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In: CIRP annals. - 0007-8506 .- 1726-0604. ; 32:1, s. 281-285
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Journal article (peer-reviewed)abstract
- In many industrial applications of machinery drives, there is need for controlling two or more drive elements with various speed and or position relationships maintained between drives. Drive motors may incorporate a wide variety of feedback transducers and have command signals derived from programmable sources or other drives in the system. This paper describes the development of a generalized system which incorporates a variety of sensors and allows a machinery designer to establish master/slave relationships to suit requirements for particular applications. The software system supporting the configurable drive allows a particular system configuration to be determined through presentation of a menu to an operator who selects the number of drives, appropriate sensors and inter-drive relationships dictated by the machine specifications. Individual drives are configured by selecting either a speed or a position feedback sensor and the source of commands for that drive. Commands for a given drive can be determined as a ratio of either the command input or the measured output of another drive as well as an operator programmable drive profile. The paper presents a summary of the control philosophy, detailed algorithms for establishing a variety of drive configurations, and techniques used to achieve the various features of the configurable drive including velocity ratioing, position phase control, and program indexing of one drive relative to another. The software package developed includes a diagnostic system for identifying and observing dynamic performances
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- Rehnberg, Ove, et al.
(author)
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Controlling diesel emissions underground
- 1982
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In: World Mining. - 0043-8707. ; 35:6, s. 48-52
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Journal article (peer-reviewed)abstract
- An enquiry to the Swedish mining industry included questions concerning planned mine production, mining methods, number and types of diesel-powered equipment, diesel engines, and transmission types of working cycles. The result representing the situation in 1977 in 37 mines are shown. LHD's are the main fuel consumers (50 percent) and the main contaminators of the air. Subsequent work was concentrated on a duty cycle for this type of equipment.
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