Research on locating control method of ball mill based on prediction
To solve the difficulty of precise locating of large inertia ball mill, a new method based on prediction is put forward. The feasibility of this method was analyzed using the motor theory and analysis on the ball mill kinematics and dynamics. The equipment to install rotary encoder that was connected to the ball mill was designed. And the testing hard ware based on single-chip microcomputer was build, and data of the angle and the rotational speed of the ball mill were acquired. With the tool of Mat lab, data were analyzed. The results shows that the angle predicted from the starting stage is very much closed to the angle which is measured, and the tolerance is very small, and it can meet the application completely.
Research on precise locating control of large inertia ball mill
To solve the problem of difficulty in precise locating of batch ball mill, the kinetic model was build, and parameters relationship between starting and shutting down were analyzed, control system was designed. At the stage of starting of ball mill, load torque, rotary inertia and so on could be acquired. Based on the relationship of ball mill kinetic parameters between starting and shutting off, parameters at the stage of shutting off could be predicted. With these parameters, the angle that the ball mill would roll after power off could be predicted. With the angle, the optimum spot to cut off power of ball mill could be find, and precise locating and stopping of ball mill could be implemented. The control system is simple in structure, easy for installation and suitable for the reconstruction of existing ball mills control.
Old English Manuscripts in the Early Age of Print: Matthew Parker and his Scribes
Covering the first dedicated program in the study of and publication of Anglo-Saxon texts, my dissertation examines the sixteenth-century origins of medieval studies as an academic discipline. By placing recent scholarship on media, materiality, cognition, and intellectual history in conversation with traditional paleographical methods on medieval and renaissance manuscript culture, I argue for a new way of understanding how early modern scholars studied and presented the medieval past. I take as my focus a corpus of emulative Anglo-Saxon manuscript transcriptions produced under Elizabethan Archbishop Matthew Parker. Equal parts facsimile and edition, these transcriptions are a unique example of early modern scholars navigating the often competing demands of late sixteenth century manuscript and print culture. This dissertation is, in part, an attempt to catalogue and document the extent of Parkerian Anglo-Saxon manuscript transcriptions. Temporally displaced from their source texts, Parker and his scribes directly modified many of the medieval manuscripts they recovered by editing, rebinding, cropping, and annotating them according to their own interpretive desires and publication needs. These transcriptions place Parker’s early modern scribes into the textual community of early medieval scribal culture, but their printed manuscript editions are an attempt to bring medieval documents into contemporary discourse. They developed new typefaces modeled on manuscript exemplars and attempted to reframe the printed version of a medieval text as an authoritative surrogate