Applied Mechanics and Materials Vols. 543-547

Abstract: IPMC (Ion-exchange polymer metal composite) is a kind of novel artificial intelligent materials. It has a lot of good properties, such as light weight, good flexibility, easily cut in any size and shape, and can be used as both an actuator and sensor. A micro-force sensor based on the theory model of cantilever beam structure of IPMC is built up, which is applied to measure probe force during the micro operations under the environment of the cell injection.

Abstract: This paper puts forward an idea of designing a surface acoustic wave (SAW) sensor to provide a research basis for subsequent researchers. We have made a SAW temperature sensor based on this idea. The experimental results demonstrated the feasibility of the idea, and shown that the frequency-temperature characteristic of the sensing unit is good and the temperature measurement accuracy of the testing unit is high.

Abstract: In order to validate differences of the graphical information between power manage systems, this paper based on the current systems in the graphical aspects of the application, analyzes the interoperability based on IEC61970 standard graphical information, and on this basis proposed electricity system graphical calibration methods and method validation for each part of the key technologies are discussed in detail. Finally, through the practical application of technology validation results demonstrate the reasonableness and verify the correctness of the method to solve the system interaction process graphics file interoperability standards compliance issues.

Abstract: In practice, the key problem to apply LQR optimal control method is how to correctly choose the weighted matrix of performance index. At present, there is no formulaic approach for this problem. To obtain the satisfying results, people must repeat to test many times. This kind of LQR control method based on genetic algorithms, which can obtain satisfying control results at first hand, is presented for triple inverted pendulum system. The method optimizes the Q-matrix by using genetic algorithms, selects trace of the result of Riccati equation as the objective function. The control problem of triple inverted pendulum is resolved successfully. The simulation results prove that the control effect by this method is better than the other methods mentioned in the references.

Abstract: As a new method for dealing with any nonlinear or non-Gaussian distributions, based on the Monte Carlo methods and Bayesian filtering, particle filters (PF) are favored by researchers and widely applied in many fields. Based on particle filtering, an improved particle filter (IPF) proposal distribution is presented. Evaluation of the weights is simplified and other improved techniques including the residual resampling step and Markov Chain Monte Carlo method are introduced for SINS/GPS integrated navigation system. The simulation results confirm that the improved particle filter outperforms the others.

Abstract: In this study the performance of three-dimensional tetrahedron elements has been compared with the background of the simulation of Flexible Multibody System (FMBS). The standard linear tetrahedron element has the least number of nodes, however it has the locking problem. The standard quadratic element has shown precise result and robust performance in many applications, but its high nodes also means large computational time. The incompatible elements integrates the excellence of the linear and quadratic elements and its excellent performance in term of accuracy and time efficiency is presented.

Abstract: To solve the problem of measuring the brake chamber at present, this integrative performance test system for bake chamber was built up by using the computer control technology. It can measure these parameters: dynamic characteristic, static characteristic, sealing performance and return performance. To verify the system accuracy, a multi-parameter dynamic simulation model for the brake chamber was designed based on AMESim. It breaks through the limit which was formerly difficult to analyze the defects of the theoretical parameters for brake chamber. By the simulation models and test system, the influence of the key component parameters to the output characteristic is analyzed .The experiment results show that the integrative performance of brake chamber can be judged very well and the simulation model is accurate and reliable.

Abstract: In this paper, the dynamic motion of the wind turbine permanent magnet synchronous generator is studied. After the permanent magnet synchronous generator motion is analyzed, the system has a complex chaotic motion in some parameters condition. A controller is designed based on optimal control theory. The optimal controller is used to avoid PMSG chaos and ensure the system is stable. This controller is simple and easy to implement. The simulation results show the whole control system has the good performance. The wind turbine PMSG optimal controller can be used by the other researchers.

Abstract: To realize the working requirements of silver Horse Companys palletizing robot. Firstly, MATLAB software was used to establish mathematical model of the robot, and it calculated the robot workspace and generated workspace figures; it can also verify whether the predetermined grip and place points satisfy a predetermined workspace. Based on this analysis inverse kinematic of the robot, each joint angle from gripping position to place position was calculated. Polynomial interpolation method is applied to calculate the each joint trajectory; Finally, Robotics Toolbox is used to simulate the robot kinematics, and get the trajectory of the robot terminate executive body; each joint position, velocity trajectory can ensure no sudden change occurs in joint angular. In this paper, robot inverse kinematics completed robot end actuator position and posture transformation from the Cartesian space to the joint space. In order to make the joint space path planning possible, this will greatly simplify the calculation. And the joint space and Cartesian coordinate space does not exist a continuous relation, thus eliminating the singularity problem.

Abstract: Piezoelectric motor under low frequency with multi-DOF rotation is issued. The establishment of single vibration mode piezoelectric motor static characteristic and dynamic characteristics is complemented, and the structure and characteristics of low frequency drive is proposed.