Edge grinding process and edge checking control for screw cutter
In envelope process of cutter, profile and tool-path of cutter are complicated, and the grinding depth is variable which causes grinding force to change on a large scale and the error of edge envelope to increase. To improve cutter accuracy, the theoretical model of cutter edge and theoretical tool-path of CNC tool grinder were calculated. Closed-loop control system was designed to accomplish control of envelope process. By adjusting feed-rate, constant force grinding process is accomplished to improve the precision of edge. The methods of edge design, tool-path calculation and manufacture processing of cutter on CNC tool grinder were discussed. Machining test indicates that cutter error is 8~11μm, and coherence error of sample thickness is reduced to only 3μm, by constant force grinding.
Fuzzy Control of Edge Envelope Process For Screw Milling Cutter
In edge envelope process of milling cutter CAD/CAM, the grinding depth is variable which causes grinding force to change on a large scale and the error of edge envelope to increase. To improve form cutter accuracy, a closed-loop control system was designed to accomplish control of envelope process. For complicated dynamic process, fuzzy controller was used to adjust parameters online. By measuring grinding force, characteristic information of grinding process was acquired. Regulation factor of feed rate is determined by grinding force ratio, and force deviation and its change rate which are used as evaluation indexes. Thus, fuzzy control of constant force grinding process is accomplished. Simulation and cutter grinding test indicates that the system has high precision and stability, and reduces cutter error effectively.
"Neurodiversion" : incorporating frontal lobe rehabilitation treatment for impulse-control management in the rehabilitation of criminal offenders in Australia
i ABSTRACT This thesis examines the legal theoretical and practical implications of the incorporation of frontal lobe rehabilitation treatment (hereinafter 'FLRT') for impulse-control management in the rehabilitation of criminal offenders, with a view to achieving an overall reduction in crime (both in prison population and recidivism). An initiative born of 'neurolaw' — an emergent area combining neuroscience (the empirical study of the brain and nervous system) with law — FLRT involves the non-invasive detection of brain structure and function. Based on the prevalence of poor impulse-control among criminal offenders, the treatment allows users to strengthen the influence of their prefrontal cortex, which specializes in long-term decision-making and impulse-control. FLRT utilizes real-time brain imaging to monitor a person's brain activity when resisting a particular stimulus. Neural activity is visually displayed in a scanner and shown directly to an individual so that person can attempt to modify it. By strengthening the neural pathways concerned with long-term consideration and control over impulsivity, FLRT enables offenders to receive neurofeedback to retrain their brains towards pro-social behaviour. Consonant with the theory of therapeutic jurisprudence — 'the study of the role of the law as a therapeutic agent' i — FLRT emerges from the union of neuroscience and diversion from punishment into treatment: 'NeuroDiversion'. It is argued that responsible incorporation of this rehabilitative mechanism advances the therapeutic jurisprudence agenda and its attendant concepts. Promoting a rehabilitative rather than a punitive response to criminal behaviour, therapeutic jurisprudence scholarship is concerned with therapeutic outcome-maximization through collaborative treatment and individual rehabilitation to further the well-being of the offender. ii The central analysis of the thesis examines existing court-mandated opportunities for offender-rehabilitation through mental health diversionary mechanisms and the regular criminal justice system in Australia. FLRT-utilization for categorized impulse-control management within this existing framework is then explicated. The emphasis on mental health diversion courts specifically is in recognition of the prevalence of mental illness among offenders and the implication of impulsivity as a specific diagnostic criterion in many mental disorders. This thesis argues for diversifying FLRT by widening its jurisdictional ambit beyond the existing framework. Suggestions to fill the gap for treating someone suffering from poor impulse-control in the absence of a mental illness are proffered. Amendments to sentencing protocols for inclusion of FLRT as part of court-mandated rehabilitative treatment, not as full diversion, for major indictable offences in higher courts are advocated. The use of FLRT in tribunals and …