Applied Mechanics and Materials Vols. 385-386

Abstract: We present a new method to accurately tracking persons indoors by active RFID technology. To deal with nonlinear measurement model, the EKF(extended Kalman filter) is used to estimate the target trajectory. This paper developed the fusion estimation algorithm for the common indoor tracking problem with the reader at any location and fusion estimation with variable number of multi-sensor system. Simulations show the algorithm developed here can adaptively adjust the model parameter while tracking and obtain good estimation performance for indoor RFID tracking.

Abstract: A new fault diagnosis method based on artificial immune network is proposed. The network combined aiNet with radial basis function (RBF) NN. The structure of the network proposed is the same as RBF NN. The training samples are clustered first by the improved aiNet algorithm. The centers of the clustering are saved as the centers of the hidden layer, therefore, the amount and positions of nodes in the hidden layer can be determined automatically. The weight matrix is determined by least squares (LS) algorithm. The network is applied to fault diagnosis of CJK6136 spindle gear case. The results of the experiments confirm the performance of the proposed network through comparing with RBF NN under the same conditions. The diagnosis success rate for the network proposed was 99%, while that for RBF NN is 89.5%.

Abstract: In the passive containment cooling system (PCCS), water distribution tests are essential to verify the water distribution devices performance. Without regular boundaries and homogeneous intensities, images of water film acquired from these tests are hard to be detected by conventional approaches. We propose an improved segmentation method to identify the water film areas from the complex background. Considering the gray distortion resulted from asymmetric illumination, the method combines the modified motion segmentation and optimal threshold method. Detection results show that this method is hardly affected by the illumination change, and also insensitive to noise.

Abstract: Steady-state power flow calculation belongs to power system steady-state analysis, and the data used in calculation should be steady-state data. However, the existing SCADA system hasnt distinguished the transient data from the steady-state data. The real-time measured data reflect the dynamic electric power system. It is the right reason for not all of the real-time measured power can be used for power flow calculation. In another word, it causes the matching problem between measured data and power flow calculations. Based on the current situation of information collection system, the characteristics of the measured data had been analyzed in this paper. And an effective acquisition method for steady-state measured data is proposed on the theoretical basis of the law of large numbers. It uses the average value of the measured data that in the same load state to approximate the steady-state true value in one period. And the steady-state data can be used in power flow calculation. The simulation results show that the method proposed in this paper ensures the accuracy and reliability of power flow calculation.

Abstract: An swarm intelligence algorithm, particle swarm optimization (PSO) algorithm, is used in data association problem for multi-sensor multi-target data association. The association relation between measurements and targets is described by the likelihood function of filter innovation to establish the model of the optimal combination. Lagrange relaxation technology is used to reduce the combination to two dimensions firstly when solving the optimal combination problem, and then the improved PSO algorithm, which based on the cross and mutation rules, is used to obtain the optimal solution, and get the optimal association pairs for measurements and targets. The simulation shows the superiority of the method in accuracy and speed at last.

Abstract: Electro-hydraulic controlling drill rig has played a very important role nowadays in drilling program. The design of monitor system for JD15 electro-hydraulic controlling drill rig, and the functional requirements of different parts, including real time data acquisition, processing and output, real-time monitoring and display of parameters, have been studied according to the actual demand of monitor system, and additionally, the design puts forward relevant thoughts about the system in the way of computer software and hardware.

Abstract: The aging problem of society and contemporary young people values's change, it is very difficult to find a natural person as a family helper in the demand of labor market. The design of household conveying robot in this paper is mainly used for disabled elderly patients or paralysis in bed. When they are not convenient to take objects, they need to have a household conveying robot which is easy to operate to help them complete. Robot use STM32 as the main controller and ZigBee module as wireless communication, realize robot's running, obstacle avoidance and a variety of angles of rotation of robot arm through operating the computer, and grab what they need to the target location.

Abstract: The actuator of robot joint is designed based on Power source of the GMM. The working principle and characteristics of the GMM are discussed in detail and the work performance is validated by experiment. The differential decline amplifier configuration, the rotor and housing part are designed and the assembly drawings are gotten. After designing, the intensity of each portion is analyzed. Not only the mechanism of design of actuator of the robot joint is changed, and also the large-mass problem of the actuator mechanism of biomimetic micro-mechanical is solved. The reference is provided for other actuator mechanisms.

Abstract: In order to improve the accuracy of the-5-DOF-hybrid robot motion control, it is necessary to establish a mathematical model of the error in the interpolation process. On the basis of the structure characteristics of five degrees of freedom hybrid robot and the algorithm of linear interpolation and circular interpolation, the error calculation patterns about the concave surface machining and convex surface machining are set up respectively in the paper. Then, examples are analyzed. The results show that the nonlinear error caused by using the straight-line interpolation method is much smaller than the normal vector rotation error and linear approximation error; when conducting surface machining, the error caused by the application of circular interpolation algorithm is less than linear interpolation error. By the comparison of the error analysis of different interpolation method, the control methods for reducing errors are proposed.

Abstract: At present, the trouble rate of the new crystal dint arm equipped on the new battle plane is very high, we can’t use the dint arm experiment equipments we have now to do function test to it, so we have designed the dint arm intelligence synthesis test system With Embed machinery control as its core, adoption unit wooden blocks type construction, programmed with VB, circulated in WINDOWS98. Those made the automatic apparatus have lots of advantages, such as high measure precision and autoimmunization, good reliability and universal, the machine can be expanded, the software can be enlarged and advanced, the man-machine interface is friendly, it can also be operated simply. By being tested, this machine is well-found, holding advanced techniques and predominant capabilities. It has important significance for improving the fine rate, duty rate and increase combat effectiveness.