Applied Mechanics and Materials Vol. 203

Abstract: current electromechanical products are moving in the direction of large integrated and small intelligent, a mechanical and electrical equipment is usually composed of many parts, we not only need physical test to know whether these parts perform well or not, but also need simulation analysis for many times to verify the performance of the whole device. Firstly, this paper depicts the current development situation of mechanical and electrical co-simulation technology, then researches its practical application combined with industrial production.

Abstract: this paper analyzes the development situation of new energy vehicles and the problems in the industrialization process. and then introduces the use of automobile electric control technology in new energy vehicles.

Abstract: Through research and analysis of the detection system plan demonstration system from the topology, software architecture and the basic systems functions, this paper discusses the basic components, the model library and run the process of scenario demonstration engine of plan demonstration in the detection system. It introduces the running control algorithms of scenario demonstration engine, the obscured corner priority judgment method, the command processor, scenario processor, and model design to achieve some of the key technology in scenario demonstration engine.

Abstract: The paper analyzes the method of direct tension control, provides repaired method of closed loop speed for tension control of underfeed winder, and designs the systematic hardware figuration and software to effectively meet the demands of different volume control. Furthermore, the problems including pressure control of pressing roller, load distribution control of two-drum winder, tension control of paper, and dynamic compensation control were analyzed and solved through the design of hardware and software of S7-300 PLC.

Abstract: Due to the existence of the accumulation errors in inertial navigation system(INS) and traditional point-mass filter (PMF) algorithm has problems of navigation precision and reliability when it is used for underwater terrain matching navigation, an improved PMF algorithm is proposed. Because the PMF algorithm is sensitive to initial errors and degeneration phenomenon usually appears with the increasing of matching number, the improved algorithm adopts cubic spline interpolation method to deal with the posterior probability density to prevent degeneration phenomenon. Then the TERCOM algorithm is introduced for initial alignment to reduce the influence of the initial errors. Finally the improved algorithm is simulated. The simulation results show the algorithm has a good robustness and accuracy.

Abstract: The successful application of robotics is an important way to enhance the engineering machinery and equipment, scientific and technological content. The definition of industrial robots and Research, and simple control of industrial robots and the final flow chart is proposed to adapt to the development of machinery industry, according to the agile manufacturing strategy, and looking forward to its logical design of the development trend.

Abstract: In view of the large amount of calculation and long operation cycle in the particle filter tracking algorithm. This paper puts forward a particle filter designed in the FPGA platform, using fast calculation speed and parallel processing mechanism of the FPGA to improve the processing speed and performance of the system. The experimental results show that the system has a good real-time and tracking accuracy. Its portability is strong, and having a broad prospect of application.

Abstract: A classic design method in frequency domain was used in preliminary design of three-loop autopilot. The preliminary design results derived out the bounds and initial values of optimization variables. Based on the system performance indicators, an optimization model was proposed including the use of weight factors and typical values of performance indicators. The optimization design was realized and verified with the use of genetic algorithm (GA) built in Matlab Optimization Toolbox. The design instance shows that the optimization model and strategy have a good effect and could meet the optimization needs when different performance focuses are desired.

Abstract: For image guided missile, in order to avoid frame collision, the maximum needed frame-angle of the seeker should not exceed the maximum available frame-angle in flight. Subjected to diameter and volume of the seeker, the required frame-angle needs to be reduced. By combination signal of frame-angle, three different improved guidance laws are discussed. By using of special developed optimization scheme, the integral proportional guidance is selected finally for its best effect. For purpose of reducing required overload of the missile, further improvement of the guidance law is generated by using variable proportional factors. The simulation results show that after using of the final improved guidance law, the maximum required frame-angle is reduced by 1.5, the required overload of the missile at the beginning of tracking is reduced from 5.8 to 2.4. According to the results, the effectiveness of the improved guidance law is verified.