Extending the capabilities of automatically steered shearersFunded under: ECSC-COALRES 6C
The main objectives of the project were to develop and apply strategies for extending the applicability and increasing the utilisation of machine steering. Attention has concentrated mainly on methods for reducing dependence on the mechanical roof follower device used by all current British Coal steering systems. This transducer, which provides the fundamental control reference for a Natural Gamma steering system, is the most vulnerable element of the system, particularly where the cutting drum is leading the machine, as in the case of double-ended ranging drum shearers (DERDS). A new steering method has been developed which dispenses with the need to deploy the trailing roof follower on a DERDS machine, thus enabling the use of short follower arms which are less prone to damage. This approach has been shown to offer a viable steering strategy using current tilt transducer technology. Evaluation of the technique has been carried out via simulation and by comparison with actual data from a MIDAS-controlled machine. However, in order to meet the computational demands required, the multi-purpose automatic control equipment (MACE) was chosen as the basis for the new steering system.
Bibliographic Reference: EUR 14922 EN (1994) 143 pp., MF, ECU 8
Record Number: 199510373 / Last updated on: 1995-03-16
Original language: en
Available languages: en