Advanced Materials Research Vols. 765-767

Abstract: Because traditional keyboard quality manual inspection is inefficient and low reliability for subjectivity, machine vision based automated inspection system was developed. Keyboards fine difference in position and rotation angles existing in captured images influenced image matching. Hough transform was applied to detect the edges of keyboards for their image calibration. Many small image templates for each key and a global template for entire keyboard were set up for automated inspecting character printing quality with moderate difference sufferance. Two CCD cameras were used for image capturing to deal with keyboard big area and software was developed on HexSight Image Kit. Experimental results showed that keyboard quality can be effectively inspected with better performance.

Abstract: A technical challenge for large power loading test device is how to achieve both of high loading dynamic performance and high energy efficiency, consequently power recovery and reuse technology should be applied. Hydrostatic secondary control has reasonable dynamic performance for loading and benefits power recovery. However conventional secondary control based on constant pressure network (CPSCS) can still be further improved when using in loading test bench for hydraulic driving head. This paper proposes hydrostatic variable-pressure secondary-control (VPSCS), for which the corresponding system is designed. Subsequently by simulation with AMESim, the dynamic performance and energy feedback or recovery efficiency of CPSCS and VPSCS are analyzed and evaluated, and finally the works in the next step are presented. The conclusion shows VPSCS, compared with CPSCS, improves energy feedback efficiency by 18%~30% but has worse wave shape of load torque when using the servo pressure valve set designed preliminarily.

Abstract: In this paper, a Hammerstein model based on forward feedback neural networks was proposed to tackle the optimal control of a nonlinear MISO system. The method offers a solution to the optimization of internal models. The optimal control with the preset value was implemented under both static and dynamic optimal indices. The simulation results showed that the algorithm can fulfill the task of blending ethanol and gasoline effectively.

Abstract: Exploiting the structural merit that electric motors can be controlled precisely in speed und torque, this paper investigates the use of Torque Vectoring Control (TVC) for improving handling of electric vehicles. The strategy consists of two control levels. The upper level controller layer achieves reference yaw rate tracking, by using the 2-DOF planar bicycle model with a linear tire model to calculate the desired yaw rate. Then with sliding mode control law the desired yaw moment is determined. The lower control level determines control inputs for four driving motors by means of optimum traction distribution. Simulations are carried out by using the co-simulation of vehicle dynamics software CarSim and Simulink to verify the effectiveness of this control system and the effects of parameter variations (friction coefficient and throttle).

Abstract: An overly large passive synchronization system will be needed in a Heavy forging hydraulic press while entirely relying on passive compensation. And it will increase developing and maintain costs of the equipment. Therefore the main drive system should be considered. The paper developed mathematical model of the cylinder of the main drive system from the perspective of the main drive system of the heavy forging hydraulic press; the eccentric load points, load size and speed of moving beam are the three major factors that influence the synchronization of cylinders. Synchronous Controller was linked in the active corrective procedures and simulated based on Simulink, simulating results show that the eccentric load points have the biggest influence on the cylinder synchronization, while the speed produces smaller effect.

Abstract: This paper proposes using BP neural network PID to improve the yaw stability of the vehicle with active front steering system. A dynamic model of vehicle with active front steering is built firstly, and then the BP neural network PID controller is designed in detail. The controller generates the suitable steering angle so that the vehicle follows the target value of the yaw rate. The simulation at different conditions is carried out based on the fore established model. The simulation results show the BP neural network PID controller can improve the vehicles yaw stability effectively.

Abstract: As one of the most important subsystem of automotive control systems, the design of automotive lighting control system is essential. In this article, the automotive intelligent headlight control system based on CAN bus was introduced, and the system hardware structure and software design processes was given. Adopted MC9S08DZ60 microcontroller which integrated the CAN controller as the master chip. While taking advantage of the photoelectric sensor to analyze road lighting conditions, according to light changes in the external environment to achieve automatic dimmer. The circuit has characteristics of simple hardware design, high reliability and real-time. And provided a theoretical basis for the Hyundai Motor intelligent control system.

Abstract: In various medical institutions, the ampoule is an essential container in daily medical operations. The automatic opening device for medical ampoule based on optimization design method and dynamics analysis is introduced in the paper. The automatic opening device can be used in the place of hospitals and clinics and fitted for different specifications of the ampoule. The necessary operational process that included nick, disinfection and break in the work of ampoule opening was integrated in the device. The work efficiency was improved greatly through the mechanisms arranged in circular. In the process of using, all ampoules kept an intermittent motion in a circulation under the control of transmission unit. The process of automatic opening will be completed in its cyclical-intermittent motion in about 30 seconds. In the research, the virtual prototype technology was used to simulate the kinematics and dynamics characteristics of the mechanical system. The feasibility of the design scheme of mechanical system was proved with the simulation analysis results. The equipment has advantages of the structure is compact, safe and reliable, easy to use. The research of the automatic opening device for the medical ampoule can be regarded as the reference of the related research.

Abstract: The shortage of energy prompted the Li-ion power battery to become the new alternative energy. As the main body of the Li-ion power battery, the electrode has a great influence on safety, performance, cycle life and capacity of the battery. Thus, it is necessary to inspect surface defects of the electrode precisely. Then, a new inspection method is proposed in this paper. In the method, the machine vision based on smart camera and combined with LabVIEW which is the graphical and virtual programming software is applied to inspect defects of the electrode. This combination of hardware and software is helpful to improve the efficiency of the electrode inspection.

Abstract: A novel approach to impedance control based on the object is proposed to control dual-arm systems with senseless force. Considering the motion of the object, the statics and dynamics of the dual-arm systems are modeled. Extending the dynamics of dual-arm system and the impedance of object to the operational space, impedance control with senseless force is presented. Simulations on a dual-arm system are carried out to demonstrate the performance of the proposed control scheme. Comparing with position control, results of numerical simulations show that the proposed scheme realizes suitable compliant behaviors in terms of the object, and minimizes the error of the relative position between the manipulators even without force sensors.