Advanced Materials Research Vols. 538-541

Abstract: A simulation methodology suitable for morphing wing aircraft is presented, accounting for the changes in both inertial and aerodynamic properties. The aerodynamics was generated with vortex lattice method and solved concurrently with 6DOF nonlinear extended equations of motion. Due to the wing morphing, there are 4 additional forces and moments exhibiting in the extended equations of motion. The simulation mythology was applied to M-wing morphing aircraft, and the longitudinal dynamic response was analyzed with the wing morphing symmetrically. The results show that the additional forces and moments influence the flight dynamic considerably

Abstract: This paper introduces a complex multi-body dynamics model which is established to simulate the dynamic behaviors of a multi-stage hybrid planetary gearing based on the finite element method and the software ADAMS. The finite element method is used to introduce deformable ring-gears and sun-gears by using 3D brick units. A whole multi-body dynamics model is established in the software ADAMS. Mesh stiffness variation excitation and gear tooth contact loss are intrinsically considered. A rich spectrum of dynamic phenomena is shown in the multi-stage hybrid planetary gearing. The results show that the static strength of main parts of the gearing is strong enough and the main vibration and noises are excited by the dynamic mesh forces acting on the tooth of planet-gears and ring-gears.

Abstract: Robotics is a spiry integral technology of mechanics, electrics and cybernetics. Through systematical study of a wheeled mobile robot, The kinematic model of it is deduced. A Cerebella Model Articulation Controller (CMAC) PID controller was developed to control the motion to accomplish the realistic motions of the wheeled mobile robot system. The experimental is carried out. The results prove the algorithm is correct, and indicate that the design of CMAC-PID controller is a success. The whole research will provide a reference to the study of the mobile robotics.

Abstract: The PC-based ryodoraku technique has played increasingly important role in the field of traditional Chinese medicine because of its advantages of better preventive diagnosis, less side effects and inexpensive medicare. Since the 1950’s, Dr. Nakatani Yoshio has developed the ryodoraku methodology to measure skin resistance for the purpose of preventive diagnosis based on Chinese acupuncture and the qi-field theory. However, the physician can hardly measure and adjust the qi-field biological energy of the limb meridians because of the clinical complexities for the moving robotic platform handicappers. In this paper, the ryodoraku theory of the limb meridians is modified by the bladder meridian detection on the spinal cord of handicappers so that they can acquire better clinical therapy. A PC-based expert system is developed on the crystal panel to detect bladder energy and make real-time acupuncture therapy according to the qi-field reactions on the spinal meridian of the examinee. Finally, clinical experiments are carefully schemed to justify the advantages of the proposed algorithm in Tse-En Clinic of Traditional Chinese Medicine.

Abstract: Bispectrum produced by third order cumulant contains the asymmetric and nonlinear information of signal, which can be used to describe the nonlinear phase coupling, especially the quadratic phase coupling, has been widely applied in fault diagnosis. The features of fault signals and normal signals are fetched by 2-D wavelet in different directions, then these features are used to diagnose fault. The experiment shows that the method can achieve satisfactory result.

Abstract: Self-balancing robot is a multivariable, coupled, nonlinear dynamic system, using the optimal pole assignment which can give attention to both good dynamic characteristics and LQ optimal design technology robustness and other advantages. Emulation and real-time control are given to show the effectiveness of the presented method.

Abstract: The heteroclinic bifurcation of the Duffing-Van der Pol oscillatory System is studied by the hyperbolic Lindstedt-Poincaré method. The heteroclinic solution can be solved analytically by the method. And the critical value of the bifurcation parameter under which heteroclinic orbit forms can be determined by the perturbation procedure. Typical applications are studied in detail and compared with numerical results to illustrate the accuracy of the present method.

Abstract: Based on the standard particle swarm optimization an improved PSO algorithm was introduced in this paper. The particle swarm optimization algorithm with prior low precision, divergent character and slow late convergence is improved by joining the negative gradient. By adding negative term on standard PSO formula, combining with coefficient of negative gradient term and inertia weight , lead to effectively balance between the local and global search ability. It will accelerate convergence and avoid local optimum. Moreover, from the bionic point of view, this improved PSO algorithm is closer to the reality of the actual situation of the bird flocking. From the simulation results of four typical test functions, it can be seen that an improved particle swarm optimization with negative gradient can significantly improve the solving speed and solution quality.

Abstract: Using of two-phase flow theory to set up liquid-solid separator inside the water and slag particles separation model, studied the strainer inlet and the relative relationship between the inlet and outlet, obtained the corresponding two-phase flow rate and the concentration distribution. It is shown that, entry form using the reverse side of slag cyclone and centrifugal separation methods to achieve the self-scouring effect and fluid, more conducive to the dispersed particles and continuous phase separation; From the strainer inlet and outlet position relationship point of view, taking into account the water uses from the side into the bottom and out from the top side is more reasonable and effective.

Abstract: In order to get the grid Multi-Scroll in the two directions, based on a simple unstable system, the way of the combination of the translational transform and step function was put forward to make the scrolls extending in the x and y directions in this paper. The quantity of scrolls can be controlled by two parameters N and M. A simulation system was designed with Labview to simulate grid Multi-Scroll chaotic system, it demonstrates the existence of grid Multi-Scroll chaotic attractor.