The conceptual design model for mechanical product and its computer aided design are the important and focus problems. A mechanical product design process of FPBS model, function-principle-behavior-structure model, was put forward and discussed. The semantic relationships between the elements of FPBS model were studied to make foundation for the its application. The operational demands of knowledge system for FPBS model were analyzed, and it is indicated that the ontology can be applied effectively to knowledge system operation of FPBS model. Then, an ontology model was established based on FPBS and a FPBS ontology model system was further constructed. The experimental results indicate the model can be used in computer aided conceptual design for mechanical product effectively.

It is important to evaluate and manage technology risk in developing weapon equipment. In order to evaluate the technical risk of warship design in reason, warship equipment design project and its characteristic were analyzed, on this basis, technology readiness assessment method was applied for setting up index system of evaluating technical risk for warship design. The index system, borrows the ideology of technology readiness level (TRL), congregates the characteristic of warship equipment design, can make measuring technical risk to be practical and flexible. So the problem on how to measuring technical risk of project is solved. This index system has some reference for evaluating other equipment’s technical risk.

The purpose is to improve the search performance of the particle swarm optimization algorithm applied to solving the optimization design problem of the section size of the truss structure under the condition of stress and displacement constraints.The basic theory about the information entropy and particle swarm optimization algorithm were introduced, the feasibility about combining them for being understood was analyzed, the parameters of the particle swarm optimization algorithm was reasonably set and the information entropy was introduced to playing the twofold roles of the fitness function and terminated standards. In order to test the search performance of the improved particle swarm optimization algorithm using above methods, it and other optimization algorithms are compared with applying to solve two classic truss structure optimization solutions. The results experiment data comparison shows that the particle swarm optimization improved by the information entropy can search the smaller stress variance than references’, which reduces stress range of the truss structure and make it safer. The conclusion is that the improved particle swarm optimization algorithm by the information entropy has the better search performance in solving optimization problems comparing with the other similar algorithms.

In order to explore the properties and the optimization method of IHI flying shear mechanism, This paper analyzed the structure and working principle of IHI flying shear mechanism. The analytic method formula of the position of shear mechanism through numerical method was deduced and the initial position of the shear mechanism was calculated. The reappearance of the movement process of flying shear occurred in simulation analysis based on the rod model of flying shear mechanism which was established by using the ADAMS dynamics analysis software. And the shear blade motion trajectory, velocity curves and shear edge opening curves were obtained from it. According to the analysis results, the structure can be optimized through the software of ADAMS. The optimization results improve the problems of ahead and lag of the cutting speed in the cutting process which is beneficial to the shearing process and rolling process. Analysis and optimization results of ADAMS have practical application value for the structure design and transformation of IHI flying shear mechanism.

In view of the problem which exists with using solid waste transferring station and compression vehicle at the same time, the new scheme for the solid waste transferring devices was determined.The kinematical optimization design of sixbar liftdischarging device was computed with genetic algorithm. Objective function and restriction were established. The lift discharging track of waste tip lorry were optimized. the dynamical optimization design was realized on ADAMS.  The configuration parameters of relative components were confirmed. On the basis of the optimization design, the prototype model was made, the prospective requirements can be met through the experiment.

For the problem that the compaction effect is not well in the existing municipal solid waste(MSW) compaction device, a new compactor and container for the MSW compaction was presented. A compacting way for MSW was given, which has better performance in the compaction effect and tightness of the waste. A push-shovel-shaped compactor device of the MSW compaction was designed by optimizing the compactor structure of traditional MSW compaction device, which the compress ratios and compaction effect can be improved. A new waste container matching with the designed push-shovel-shaped compactor was presented by improving the structure and sewage outfall of the existing MSW container. Such a compactor device and container for the MSW compaction were analyzed using the finite element method. The analysis results show the push-shovel-shaped compactor has better compaction effect compared to the planar and wedgeshaped compaction device currently used. The results can provide some reference theory to the design and manufacture of the MSW compaction device．

To make sure that the robots have good structure performance and work performance, good dynamics characteristics must be included in the structure system. As for the issue of dynamics characteristics, simplified 2-DOF redundantly actuated parallel robot model was established in the platform of ADAMS simulation software. The inverse kinematics were solved, using the method of redundant driving force to control electrical machine. At last the dynamics simulation was accomplished. The result indicated that in the driving force optimization process, the change extent and the peak value of each driving force decreased, the driving force of electrical machine was optimized and the driving function of parallel robot was improved effectively. The proposed methods and results have strong generality and broad prospect in application of the study on related redundantly actuated parallel robot, also provided the theory basis for the debugging and control of parallel robot.

The switch with dynamic gauge optimization of the rail which is designed by the German BWG company was introduced, the dynamics simulation model of cars/turnout point device was firstly built for the gauge widening type turn point device (FAKOP) of Wuhan-Guangzhou passenger-dedicated line.The kinematics parameter design method was used to proceed a simulation analysis, which is to assess the stability influence when a train cross switch with different gauge widening value of switch device to ensure the best gauge widening solution. Meantime, the paper had a simulation analysis when train passages switch from lateral line or straight line. The results of the simulation show the FAKOP can reduce stress of point blades and improve the comfort level of the train in motion.

In order to balance the convergence rate and the global searching ability and overcome the premature convergence of the differential evolution algorithm, a modified differential evolution algorithm based on Gauss mutation (GMDE) was proposed. The paper provided a detailed analysis of population diversity descent and individual stagnant evolution and then incorporated the Gauss mutation into differential evolution. The optimization performance of GMDE was evaluated and the results of numerical simulation and two engineering optimization design examples show that the proposed algorithm can overcome the premature convergence efficiently and can obtain a better balance of convergence rate and the global searching ability.

Aiming at the frequency and complexity of traffic accidents on straight road, according to artificial potential field theory, this paper presents a local path planning algorithm for autonomous vehicle collision avoidance based on dangerous repellant fields. By constructing a model of China abacus-like road with two-lane and dangerous repellant fields, bead achieved the equilibrium which is based on road boundary repellant, obstacle boundary repellant and linear spring tension. Thus, we got a non-linear equations, and solved out a non-collision trajectory which meets the requirements of vehicle system dynamics by using Newton iteration. Simulation experimental results show that the algorithm for vehicle collision avoidance is effective with the characteristics like little computation workload, good real-time performance and outstanding security and reliability.

To achieve the rapid and steady position control for sampling arm, a selfadapting fuzzy-PID controller which was combined with fuzzy control and traditional PID was proposed. The use of fuzzy logic controller made the parameter of self-adapting of position PID controller possible, it also made the controller have more adaptive ability and anti-disturbance ability. The controller also has the equal high precision with the traditional PID controller. Simulation results showed the self-adapting fuzzy-PID position controller has anti-interference ability. The controller also had faster response and shorter adjustment time than traditional PID position controller. The sampling arm motion control experiment was done. The self-adapting fuzzy-PID control was verified by changing the motion environment of sampling arm and its accuracy motion control ability and adaptive ability was also tested. It can provide the reference for the similar controller design.

During the design process of composite positioning control system(CPCS) for the DC motor, it was found that the dynamic response curves for the motor speed etc. were oscillated, and they showed a certain degree of instability. In order to explore the correlation between the oscillation and the internal structure of the CPCS, we analyzed and compared the dynamic response curves, the root locus maps, and the frequency characteristics on MATLAB. The result shows that by using the reduced-order method, the transferring function of the high-order control system can be simplified as a basic form of a real zero, a real pole and two pairs of complex conjugate poles. The root cause of the oscillation and the stability reduction of the CPCS system is the removal of the pair of complex conjugate poles that are closer to the origin. By increasing the real part or decreasing the imaginary part of another pair of complex conjugate poles, the system oscillation can be reduced or eliminated. This conclusion has important reference value of improving the control system^,s positioning accuracy and stability.

In consideration of the deficiencies in a polarization-sensitive OCT system based on the computer, such as low data-processing rate, unachievable realtime display and so on, a FPGA-based dual-signal processing system of polarization-sensitive OCT was built. FPGA design consisted of three modules: synchronous sequential control, quadrature demodulation and CORDIC arithmetic operations. Synchronous control signals was provided by synchronous sequential control module for each device of the system to achieve real-time processing of data and simultaneous display. The interference signal followed by pretreatment was implemented by quadrature demodulation and CORDIC arithmetic operations to proceed amplitude demodulation and phase demodulation, the obtained data of reflectivity and birefringence was sent into the computer to achieve real-time display via the USB interface. the polarization-sensitive OCT experiment was designed by the paper to obtain two-dimensional image of cover slip, mica and biological tissue, after analyzing the result of experiment, the ability of real-time detecting in reflectivity and birefringence is verified.

A novel composite right/left-handed transmission line was proposed by inserting 2-iteration Hilbert-fractal slots into a substrate integrated waveguide, in order to design compact antenna with a high peak gain. The equivalent circuit for the proposed transmission line was shown, and the circuit parameters were extracted. The dispersion diagram of the transmission line was achieved through using MATLAB. Then, a short-ended slot antenna was designed and fabricated based on the transmission line. The antenna working on the 1^st order has a simple feeding network. It provides smaller electronic size and higher peak gain than reported composite right/left-handed resonant antennas. These prominent performances make it good candidate for modern wireless communication system.

At present, there is mature technology about automatic feeding of rigid body which has certain shape and dimension, but there is no perfect solution for automatic feeding of flexible body. So an automatic feeding machine of kelp strip which has high flexibility character was designed. The automatic feeding machine was controlled by PLC, and was driven by stepping motor,and a turntable that intermittently rotating 180° around the horizontal axis, and two dedicated fixtures that symmetrically layout on the turntable and used for clamping kelp strip were also included in this machine. Through experiments in consideration of friction coefficient between kelp strips and nylon, the law of relationships between curved shape of kelp strip and its length that stretched out under the role of gravity, and the strength of kelp strip,the basic physical and mechanical performance of kelp strip was obtained. The dedicated fixture which had adequate clamping force for kelp strip was designed and manufactured, the thickness is 0.5-1.5 mm, and kelp strip could be pulled out from the fixture smoothly. The mechanical system and the control system design of the automatic feeding machine of kelp strip were completed by this paper. Through commissioning for the automatic feeding machine of kelp strip, we found that, the feeding machine met the automatic feeding requirement for the kelp-knotted machine.

A networked access management system based on W5100 was developed in order to realize centralized management of distributed access controllers.The system used MSP430F149, a low power loss chip, as the control core of the access controller. The realtime communication between the controller and the superior computer was realized by using W5100, a chip of the embedded Ethernet hardware protocol stack. The supervisory program of access management was designed through VC++.NET. The remote data transmission was realized by adopting asymmetric C/S communication mode and stream socket. This system transmits data reliably and has good antidisturbance feature. And the system supports for battery power, so as to solve the lock problem of the access control system caused by power failure．