Applied Mechanics and Materials Vols. 511-512

Abstract: As high-tech product, automobile show defects in various categories and patterns. The paper introduces five categories of manufacturing defects based on 978 recalls in 2012 in China, USA and Japan. Parts involving in manufacturing defects and main defect patterns are discussed and recommendations for improvement in safety of manufacturing process provided.

Abstract: Agricultural ecosystem is fragile exceedingly in northwest arid area, the areas of land salinization and desertification account for more than one-third of the country, which is further increasing.However, reservoirs in mountain areas are further from farmland, whats more, high cost of conveyance and great loss need to build considerable the type of plain in injection reservoirs to meet the development of industry and agriculture, such is the case that the number of constructing many plain reservoirs has gone up to 578 so far in Xinjiang. But plain reservoirs shallow water depth, length of spur, high permeable depth of foundation, evaporation and leakage are both high.Plain reservoir leakage lifted the underground water level of the dam after large area of land, salt with water, the land salinization dam after ecological problems, such as more and more serious. As the An Jihai set reservoir as an example, for more than 50 years of operation, the down stream of the dam over 50kilometers of land are white the salinization of sights, many cultivated lands have been deserted.Therefore, we need to improve and solve the problems existing in the plain reservoir from the source to solve the leakage caused groundwater problems is necessary.

Abstract: Mainly due to the current reduction of NOx that is SCR technology which has some problems, it is difficult to meet the increasingly stringent emission regulations.Then people study the SSCR system that uses solid reducing agent, the solid reducing agent has large ammonia density.SSCR system injects NH₃ directly into the tail in the airway through the injection system ,which is directly mixing with the exhaust. Comparing with SCR system,the decomposition temperature is low,the mixing time is shorter,that also reduces the negative impact caused by injection.

Abstract: This paper presents a new method to improve the estimation of the positions for serial robots using power-activated feed-forward neural network. In the paper, a six-input three-output neural network is created with robot joint angle sine values as inputs and positions in the world frame as outputs. The neuron is activated with an orthogonal polynomial sequence,and the neural weights can be calculated directly without involving iterative and convergent problem. It is found that, the RMS error is less than 0.25 mm for the whole work space. And the absolute and relative errors of this method are smaller than those of built in kinematics model and the traditional back propagation (BP) neural network method. Experimental results show that the proposed method can effectively predict the positioning of the given joint angles.

Abstract: This paper depicts the design of an automatic golf recycling robot. The purpose of this paper is to present the key technologies and results on the automatic golf recycling robot. The designed robot is an intelligent system that is consisted of three key modules: the hardware module includes the mechanical structure which can adapt to the golf course; the control module processes the signals from the multiple sensors and instructions to navigate the robot; the decision module can plan the path via recognition of the golf balls from the background grass. Besides, to avoid an emergency situation occurrence, the robot is equipped with a remote wireless control system. The designed robot has been tested on the driving range, and the basic functions of the robot have been implemented. The golf recycling robot supersedes the human labor significantly and shows a wide potential applications.

Abstract: The aim of this article is proposal and implementation of the multi-robot system for mapping of the unknown environment. For the localization of each robot, simple odometry was used. Navigation of the robots is based on algorithm similar to bug algorithms. Communication between robots is based on polling. The system was implemented on the platform iRobot Create. Practical experiments have proven that multi-robot system for mapping of the unknown environment is faster and more reliable than single robot system.

Abstract: Its hard to define base coordinate of industrial robot because base coordinate of robot in its inner. This article used Laser tracker system (LTS) to test its distance accuracy. Simultaneously, it is hard to must modify the controller of the robot, even though the robot kinematic compensation is high precision. Therefore, it used inverse kinematic compensation to compensate robot error by optimal method. Experiment results demonstrate that it can improve the robot accuracy in the working space, only modifies joint angle.

Abstract: Nowadays, the design on Ping-Pong balls collecting robot cannot combine autonomous control with remote control. And the existing collecting devices are not efficient enough for the ball collecting job. A design is proposed on the system of Ping-Pong balls collecting robot with autonomous and remote control, based on embedded vision processing. The design also includes a set of wheeled picking-up device. The research showed that the robot can serve the function of collecting Ping-Pong balls efficiently.

Abstract: This paper describes an unconventional overall design of eight-rotor aerial robot. An INS/GPS based Kalman Filter solution is introduced in attitude estimate to meet the high precision and reliability requirement. In order to coordinate the contradiction between high load and high frequency, we present a new control method for multi-rotor aerial robot, witch take decoupling control on lift rotors and attitude control rotors. Results of simulation and flight test show that our design on aerial robot is effective.

Abstract: In the process of command and control group decision-making, it is difficult to select appropriate decision schemes due to its attribute weight and evaluation as well as uncertainty of weigh