Advanced Materials Research Vols. 468-471

Abstract: A neural network control method for heading control of miniature unmanned helicopter is proposed. For the complexity of miniature helicopter aerodynamics, it is difficult to identify the unknown parameters of yaw dynamics model. To design heading controller of miniature helicopter without modelling yaw dynamics, BP neural network is designed as heading controller, which is trained by collected flight data. By training, the neural network controller can learn the artificial operation strategy and realize the heading control of miniature unmanned helicopter. Simulation results demonstrate the validity of the proposed neural network control method.

Abstract: In order to minimize the adverse effects of the vessel’s heaving motion on offshore operations, this paper presents a Composite Heave Compensation System for deepwater hardware installation, which overcomes the shortcomings of conventional Heave Compensation System.

Abstract: With the widespread application of motion capture technology, three-dimensional(3D) motion data can be directly obtained. In this paper, a new 3D retrieval algorithm based on semantic motion is proposed. With semantic motion template and extracting key-frame, 3D human motion database can be processed effectively by retrieval. Experiment results show that our method can improve the accuracy of motion retrieval.

Abstract: This paper studies the coordinated control of dynamic process of mode-switches for parallel hybrid electric vehicles (PHEV) during work. PID and fuzzy control algorithms are used to regulate the process of speed coordination in terms of look-up tables obtained from FC2000 testing system. Simulation results illustrate the PID controller has a better response for the dynamic coordinated control of speed in the small range variation of working conditions, so as to ensure the speed stability.

Abstract: Because of low level of informatization in automobile main gear reducer assembly line, it is proper to put forward Manufacturing Execution system to monitor, control and manager the production assembly line. First, functional requirements and coverage of MES system is investigated. Second, function of the MES for automobile main gear reducer assembly line is described. Third, the results of implementation on the line are discussed. It is proved that the efficiency of assembly line and the field management can be improved using MES system.

Abstract: With progress making in the art of industrial fields, control methods for synchronized multi-motor systems get more and more extensive applications, and there are increasingly high requirements for synchronous controllers. In this paper, a new control method for multi-axis drive systems is proposed, an adjacent-coupling algorithm based synchronization control strategy is designed, and a CMAC neural network based controller is developed. Simulation results show good performance of synchronization control accuracy, interference immunity, and convergence for the suggested synchronous controller

Abstract: This paper designs a two-valve control hydraulic system for controllable pitch propeller which consists of an electro-hydraulic directional control valve and a proportional directional control valve. The parallel control strategy is proposed and respective controllers are determined for the system. It yields out the relationship between the control parameters and valves characteristics by modeling and simulation analysis. Also the influence of the proportional valve flow rate on pitch control accuracy is discussed.

Abstract: Road intensity is an important performance parameter and evaluation index of concrete road quality. During the construction of road infrastructure, the implementation of road intensity testing has become very necessary. So as to meet the needs of remote testing, wireless communication was adopted based on CC2430. LabVIEW was used as the system’s development platform of upper computer. Through the signal collected by the pressure sensor combined with signal conditioning circuits, functions of various parts were designed to analyze the relevant parameters of the road intensity. The related data of concrete road was measured and sent to upper computer through wireless communication module, at the same time, the statistics data was analyzed with regression analysis by virtual instrument software. The functional relations between compressive strength and tensile strength of the road was found and thus it provided an important basis for the quality of road management and road maintenance.

Abstract: This paper proposes a method to speed up motion retrieval: matching algorithm improvement and motion high-dimensional index. The fast elimination algorithm is used to delete most of motions that are not similar with samplings. Then indexing of high-dimensional feature is done with 3D motion data structure. The experimental results show that our method outperforms the classical motion retrieval method both in speed and accuracy.

Abstract: This paper considers the cyclic scheduling problem in robotic cell of molds manufacture processing multiple piece types. The objective is minimizing the cycle time. A mathematical model for the scheduling problem is established, the sequencing of pieces and robot moves are combined them naturally in this practical area. At last, the probable algorithm and experiment are proposed.