Current Issue : July - September Volume : 2013 Issue Number : 3 Articles : 5 Articles
Since smelting process of electro-fused magnesia furnace is a complicated process which has characteristics like complex operation\r\nconditions, strong nonlinearities, and strong couplings, traditional linear controller cannot control it verywell.Advanced intelligent\r\ncontrol strategy is a good solution to this kind of industrial process. However, advanced intelligent control strategy always involves\r\nhuge programming task and hard debugging and maintaining problems. In this paper, a real-time embedded control system is\r\nproposed for the process control of electro-fused magnesia furnace based on intelligent control strategy and model-based design\r\ntechnology. As for hardware, an embedded controller based on an industrial Single Board Computer (SBC) is developed to meet\r\nindustrial field environment demands. As for software, a Linux based on Real-Time Application Interface (RTAI) is used as the realtime\r\nkernel of the controller to improve its real-time performance. The embedded software platform is also modified to support\r\ngenerating embedded code automatically from Simulink/Stateflow models. Based on the proposed embedded control system, the\r\nintelligent embedded control software of electro-fused magnesium furnace can be directly generated from Simulink/Stateflow\r\nmodels. To validate the effectiveness of the proposed embedded control system, hardware-in-the-loop (HIL) and industrial field\r\nexperiments are both implemented. Experiments results show that the embedded control system works very well in both laboratory\r\nand industry environments....
A continuous fuel level sensor using a side-emitting optical fiber is introduced in this paper. This sensor operates on the modulation\r\nof the light intensity in fiber, which is caused by the cladding�s acceptance angle change when it is immersed in fuel. The fiber\r\nis bent as a spiral shape to increase the sensor�s sensitivity by increasing the attenuation coefficient and fiber�s submerged length\r\ncompared to liquid level. The attenuation coefficients of fiber with different bent radiuses in the air and water are acquired through\r\nexperiments. The fiber is designed as a spiral shape with a steadily changing slope, and its response to water level is simulated. The\r\nexperimental results taken in water and aviation kerosene demonstrate a performance of 0.9m range and 10mm resolution....
The systematic design of automotive control applications is a challenging problem due to lack of understanding of the complex and\r\ntight interactions that often manifest during the integration of components from the control design phase with the components\r\nfrom software generation and deployment on actual platform/network. In order to address this challenge, we present a systematic\r\nmethodology and a toolchain usingwell-definedmodels to integrate components fromvarious design phases with specific emphasis\r\non restricting the complex interactions that manifest during integration such as timing, deployment, and quantization.We present\r\nan experimental platform for the evaluation and testing of the design process. The approach is applied to the development of an\r\nadaptive cruise control, and we present experimental results that demonstrate the efficacy of the approach....
This paper presents the results of quantitative performance evaluation of an authors� new parabolic sliding mode filter, which is for\r\nremoving noise from signals in robotics and mechatronics applications, based on the frequency and time domain characteristics.\r\nBased on the evaluation results, the paper presents selection guidelines of two parameters of the filter. The evaluation results show\r\nthat, in the frequency domain, the noise removing capability of the filter is almost the same as that of the second-order Butterworth\r\nlow-pass filter (2-LPF), but its phase lag is smaller (maximum 150 degree) than that of 2-LPF (maximum 180 degree). Moreover,\r\nthe filter produces smaller phase lag than a conventional parabolic sliding mode filter with appropriate selection of the parameters.\r\nIn the time domain, the filter produces smaller overshoot than 2-LPF and the conventional one, while maintaining short transient\r\ntime, by using an appropriately selected parameter. The presented parameter selection guidelines state that the values of the\r\nparameters should be chosen according to some estimated characteristics of the input and some desired characteristics of the\r\noutput. The effectiveness of the filter and the presented guidelines is validated through numerical examples and their application\r\nto a closed-loop, force control of a robot manipulator....
The paper presents the first experimental results on the control of a prototypal robot designed for the orientation of parts or tools.\r\nThe innovative machine is a spherical parallel manipulator actuated by 3 linear motors; several position control schemes have been\r\ntested and compared with the final aimof designing an interaction controller.The relative simplicity of machine kinematics allowed\r\nto test algorithms requiring the closed-loop evaluation of both inverse and direct kinematics; the compensation of gravitational\r\nterms has been experimented as well....
Loading....