Papers by Keyword: Intelligent Measurement

Abstract: Based on open NC system architecture, embedded condition monitoring and diagnosis units were studied with the characteristics of modularization and reconfigurable. The intelligent measurement and control unit can be used to on-line monitoring, fault early warming, intelligent diagnosis and remote maintenance, it provied a solution for group integration monitoring system construction of high-grade NC machine. In this paper, the implementation and function of the intelligent measurement and control unit were introduced from 4 aspects including whole framework, hardware, software and XPE OS. An example of cutting force on-line monitoring were given, which operate well for alarming in unstable cutting condition.

Abstract: The technique to suppress regenerative chatter is to regulate the spindle speed around the mean speed to disturb the regenerative mechanism. According to the technique, it builds a platform to collect, process the machine working information and output control instruction. On the platform, some advanced algorithms are applied to analyze and finish the control task.

Abstract: Technical solutions applied to a special complex for measuring position of a control rod in the primary coolant circuit of nuclear reactor are considered. These solutions have provided an increased accuracy, sensitivity, fault-tolerance, and lifetime. The primary transducer lifetime is comparable with reactor lifetime. The measuring complex also carries out developed self-diagnostics and diagnostics of a drive that moves the control rod. The results of the measuring complex use are analyzed.

Abstract: Modern knowledge-intensive branches of industry require industrial intelligent sensors with enhanced metrological reliability. Such sensors are expected to provide many years of operation without maintenance. The specific scientific problems that emerge while developing such sensors are considered. These problems include: experimental evaluation of quality of sensor design and technology; development of on-line strategies for metrological self-checks of sensors as well as of methods to provide self-correction and fault-tolerance. Possible ways of solution of these problems are outlined.

Abstract: The optical-fiber alignment system is a critical role on micro/nano precision engineering. In this paper, the design and fabrication of a novel, six-axis compliant nano-stage which uses flexure hinge and negative Poisson’s Ratio is presented. Every single axis is a designed planar geometry, so it is easily fabricated via laser cutting processes that enable cost down to achieve batch products. The material of six-axis mechanism is aluminum. The micromechanism consists of six trapeziform displacement structures and two hexagonal plates which are on the top and bottom. The displacement structures includes of a signal layer flexure hinge toggle mechanism stage and asymmetrical multi-layer flexure hinge toggle mechanism stage. The computer simulation of the transferring behavior was performed with a commercial package, named SolidWorks ANSYS@. The model states of stress, strain and the displacement of ratio can be estimated. The experiment was carried out with Piezoelectric(PZT) actuators and LVDT which drives and measures the displacement. Comparison of the simulation and experimental result between the single-axis and six-axis stage are presented. The results shown that the displacement of ratio is 32 times as the single-axis structures. The system maximum displacement of vertical translation, horizontal translation, tilt angle and rotational angle is 50 µm, 50 µm, 0.5° and 0.5°. In experimental, the results not only demonstrate that this micromechanism of flexure hinge and negative Poisson’s Ratio increases the displacement of ratio and reduces the size of system, but can also be applied on the optical-fiber alignment system.