Advanced Materials Research Vols. 328-330

Abstract: Li-ion battery is used widely in many industrial areas, and formation is a necessary process in battery manufacture. After formation, the performance of Li-ion power batteries can be activated. In the process of production, the key technology in the formation has been changed. The technology of formation and holding independently for each battery is turning into the formation after being clamped and then holding now. Therefore, the design of the automatic production line must base on the battery groups after being clamped. This text will introduce a new production line for the formation of Li-ion battery, mainly discuss the formation of clamped batteries, and how to realize the automation of the production line. The line uses the three-dimensional multi-layer frameworks, speed-fold chains and stoppers. The speed-fold chain is a new type of conveyor chain, and known as "flexible manufacturing unit". The battery groups can be stopped in the manufacturing line by the stoppers, and then they can be charged or discharged. The line can be connected by the lifting machine.

Abstract: The needle-selected technology is one of the key one for the control system of knitting machine. Based on the analysis of the structure and principle for the needle-selected mechanism, the drive circuits of the needle-selected device are designed to ensure the stability when knitting machines run. Additionally, this paper presents the discussion of the software design for needle -selected technology, which provides a theoretical reference for the research and development of the control system.

Abstract: The influence of different the depth to the hydrodynamic characteristics of the underwater cylinder vertical launch out of the tube was researched with numerical simulation. The finite volume method based on the multiphase model, continuity equation, transport equations of liquid mass fraction,a dynamic mesh technique and a standard tow-turbulence model are adopted to solve RANS equation in conjunction. The fluid-solid coupling problem of both movement boundary of the cylinder and multiphase flow field was solved by using numerical method. Under the influence of the gravity, the flow field affected the hydrodynamic characteristics of the cylinder was derived with the numerical simulation. Simulation results show that different launch depths affect on the trajectory of underwater cylinder and hydrodynamic. The fluctuation reasons of different pressure drag coefficient, viscous drag resistance coefficient and toll resistance coefficient were derived by analyzing simulation results.

Abstract: A method of secondary source modeling based on analogue circuits of electrical, mechanical and acoustical systems (SSM-ACEMAS) was provided in order to reduce the mismatch of transfer function estimation of secondary path in the simulation of active noise control (ANC) system. The convergence range and noise reduction performance of the system with SSM-ACEMAS and Filtered-X LMS algorithm were investigated. The results show that the transfer function of such a secondary source model has different amplitude and phase from the ideal model, which makes the noise reduction performance of an ANC system be much worse than the one with ideal model. Meantime, the convergence range of the control system is increased at low frequencies while decreased at high frequencies. The proposed model can provide a new method of secondary source modeling for further research on the simulation of active noise control system.

Abstract: This paper, based on magnetic fluid dynamics, combined with the air leakage of sintering machine, proposes a new type of magnetic fluid sealing device in sintering machine. According to the sealing mechanism of MHD as well as Bernoulli equation, the sealing theory--pressure difference equation in static sealing by magnetic fluid is deduced for the actual model of sintering machine. By using ansys finite element simulation software, the two-dimensional numerical simulation of thermal magnetic- coupling inside of sealing device is set up, the effects of different temperature on the magnetic properties are analyzed and the best sealing performance is found, that is when the edge temperature of the sealing device is controlled from 30°C to 80°C.

Abstract: One wireless attitude measurement system based on a MEMS multi-sensor has been developed. The data from 3-axis MEMS accelerators and 3-axis MEMS gyroscopes are used to determine the pitch angle and the roll angle by using an extended Kalman filter (EKF) equation deduced from the direction cosine matrix. The attitude angles can be resolved from the EKF algorithm based on Quaternion. The system can be used in dynamic as well as static environments by adjusting the measurement noise matrix of the extended Kalman filter equation. Results indicate that system is determined with standard deviations below 5º even in high dynamics and 1º in static state. The system can collect wireless data from over six nodes simultaneously with a sampling rate up to 100 Hz. The system node measuring 22x15x10mm and weighing 4.5g contains wireless communication module, 3-axis gyroscope, magnetometer and accelerometer.

Abstract: Composed of tri-axis differential mechanism and adjustable flexible pipe-diameter adaptability mechanism, an underactuated wheeled in-pipe robot is developed to avoid the motion interference during moving in elbow. The experiment system is established to evaluate the robotic differential performance. The experimental results show that the proposed robot has several advantages such as reliable differential performance and pipe-diameter adaptability, and hence verify that the present underactuated method is an effective way how to prevent a wheeled in-pipe robot from motion interference.

Abstract: The sprocket wheel and pallet cars of industrial sintering machine utilize the gear and pin rack gear meshing to drive focused on the defects of velocity fluctuation and arching during running process, motion features for sprocket wheel and pallet cars line were analyzed. In this paper, based on virtual prototype motion simulation, using ADAMS simulation software, the regulars of motion which are the velocity and acceleration of the upper and lower pallet cars line and the angular velocity of tail sprocket wheel were analyzed. And then, the reasons of velocity fluctuation have been found. Simulation analysis results are consistent with the actual situation. We obtain the movement rule of traditional type sintering machine. Study results can provide the theoretical basis which can be used to solve the problems of velocity fluctuation in future.

Abstract: In this article, the Control System based on the OMRON CJIM series PLC has been discussed, which meets requirements of the auto-packing pantyhose machine well. The principle and hardware configuration of the Control System were introduced, and the assignment of input/output, control programs as well as Human-machine Interface were designed. Importantly, the speed and quality of the packing of pantyhose were successfully enhanced, so this control system can effectively reduce the human resources.

Abstract: Fiber winding tension control is a key technique in the winding machine which influences the quality of winding product directly. The change of diameter results in the winding tension becoming more complicated, time varying and non-linear and has a severe influence on steady and transient performance of winding system. This paper proposes a novel control scheme, which integrates the feedforward observation algorithm with PID control algorithm. One of the most merits is that it can compensate disturbance value based on the measuring data of rotational inertia and rotational accelerometer in real time. Simulation results show that control system has well qualified with high control precision and high response speed.