In order to improve the sub-soiling coefficient and decrease the cost,a forced-vibration subsoiler which applied a crank shaft to implement vibration was design.The effect of forced-vibration on reducing traction resistance at different tillage depth and velocity conditions was explored,and the results showed that the traction resistance was reduced by 19.28 % at vibration treatment compared with non-vibration treatment,and the effect of reducing traction resistance was more obvious as the tillage depth increase.These results provided a basis for reducing traction resistance at vibration treatment,optimizing machinery structure and improving the economy of whole machine.

A multi-node control scheme was proposed to optimize the Work In Process(WIP)on mechanical dibbler assembly line.Theory Of Constraint(TOC)was combined with the production modes of push and pull to divide assembly line into segments first.Next,bottleneck buffer,parallel buffer and risk buffer were seted up in the subsection node.Then calculated the optimal capacity of the buffer according to the duration of the station failure and the material consumption rate,obtained the optimization scheme of multi-node control of WIP in mechanical dibbler assembly line.Finally,FlexSim was used to simulate the mechanical dibbler assembly system of an enterprise,verified the feasibility of the scheme.

A two-dimensional plane single grit cutting model is established by using finite element analysis software of ABAQUS.The machining process of a single abrasive particle for cutting SiCp/Al composites with volume fraction of 45 % was studied.The effect of different machining parameters on cutting force and machined surface topography after cutting was analyzed through the experiment and simulation method.The experimental and simulation results show that the cutting depth has much more effect on the cutting force than the cutting speed in certain conditions.When the cutting depth are the fixed value,the cutting speed has little effect on the cutting force;when the cutting speed are fixed value,the more depth of cut is,the more force of the cutting can be gained.The effect of single diamond grit on reinforcement in composite materials is embodied in the rotation and movement of SiC.Discrete holes of the SiC particles are the main formed surface defects in the process.

Disruptive innovation is a product innovation technology that breaks the mindset,which is helpful for the new and old enterprises to realize the innovation of technology,and improve the core competitiveness of enterprises.In order to reduce the threshold of disruptive innovation,integrate the technology evolution theory and innovative tools of TRIZ and scenario decomposition method based on the disruptive innovation theory,creating the model of disruptive innovation based on the scenario decomposition method and TRIZ,the efficiency and quality of product technology maturity prediction and the innovation solution obtained are improved,and the pertinence of the key problem analysis is enhanced,the rationality and practicability of the model are verified by the example of the disruptive innovation design of refrigerator.

The current situation of a food processing plant in the original distribution center is introduced,using qualitative analysis and quantitative calculation to analyze the comprehensive relationship among the functional areas.Based on the factors of market demand,logistics,supply and demand analysis and other factors,the scale of the main working area of distribution center is determined.System layout design method is used to carry out scientific planning and layout for each operation area of the new distribution center of the enterprise.Using Flexsim simulation software to simulate the layout of the distribution center plane area,the logic flow between the function area of distribution center acceptance area,circulation processing area,sorting area and other areas is established,and the parameters are set to realize the compiling and running of the simulation model.The simulation results are analyzed in order to realize the prediction of the working efficiency and the optimization of the operation and to save the manpower,capital and resources cost.

To solve the problem of misusing cutting tools,fixtures and workpieces in the machining process of a smart hobbing machine,a method to check the matching of cutting tool,fixture and workpiece to a machining task is proposed .Based on this method,the framework of the Identification and Matching System of Cutting tools,Fixtures and Workpieces (IMS-CFW) for a smart hobbing machine is constructed.Some identification and control technologies of realizing system functions are studied.An identification method based on laser-marked 2D barcode and Radio Frequency Identification(RFID) is adopted for creating electronic tags.To solve the interference and collision problems in reading electronic information automatically,here are proposed a positioning control method of RFID read-write head reading the fixture information based on fuzzy self-tuning PID algorithm and a rotating control method of cutter bar’s or fixture’s axis based on the time of RFID device reading information.Finally,an IMS-CFW is developed.The machining experiments show that the system can solve the misuse problem,reduce preparation time and improve machining efficiency,which is practically worthy of industrial promotion.

Aiming at the problems of low automation degree,low production efficiency and high failure rate of the traditional production line of the electric meter,a new type of automatic production line is designed based on the digital factory technology.Taking a V5.9 smart meter production line of a company as an example,conduct modeling and simulation analysis and put forward corresponding measures to optimize scheduling,compare before and after optimization of production conditions,verify the effectiveness of the optimization program and the good application prospect of digital factory technology in the field of manufacturing industry.

In order to meet the process-driven aviation product design and manufacturing integration needs and solve the problem of efficient parallel control in the development of aviation products,a method of aeronautical product maturity modeling based on Hall three-dimensional structure is proposed.The method defines the maturity level according to the actual situation of the enterprise,the synergies,the work content,the milestone and the corresponding key event domain in each level.Its realizes the management of the maturity level and provides a solution for the domestic aircraft manufacturing industry to achieve the goal of design and manufacturing integration.Finally,based on the above method,a prototype system of aviation product maturity management is developed.

Traditional design methods of rail plate carrying vehicle tend to be conservative.The structural strength had a large surplus.To reduce weight and the manufacturing cost of the structure,a new structure optimization method was proposed.This method combines the finite element software ANSYS and the optimization software ISIGHT.First of all,choosing the design variables which have large influence on constraint condition and objective function by the method of Latin Hypercube Design(LHD).Then,the model of the neural network radial basis approximation is set up.Finally,the approximate model is optimized by using the Multi Island Genetic Algorithm(MIGA).The results show that the method can greatly improve the efficiency of optimization,and the structure weight of rail plate carrying vehicle reduce 9.9 % by the optimization design which is of important significance for the design of rail plate carrying vehicle.

To overcome the defects of composite method on the moment of inertia existed in the large commercial software and experiment,using the matrix deduced the theorem of moment of inertia of multi-body.Vector is replaced by coordinate array to establish the relationship of the same vector array between coordinates;the theory of linear algebra is used to deduce the relationship of inertia matrix between coordinates to establish the relationship of the moment of inertia and product of inertia between coordinates.The conclusion is extremely concision,easy to develop the corresponding program with computer language.Now composite software of moment of inertia is developed by using the method.The software that can composite the mass,the center of mass and moment of inertia of the two rigid bodies does not need to establish rigid body model,only need to input the basic parameters on it.Moment of inertia of composition is preliminary work of dynamics analysis for automotive powertrain system,which has obtained the good result in decoupled optimization of automotive powertrain mount system.

In order to eliminate the high interior noise of a SUV under WOT case,analyzing the reason to the high interior noise,and the mount bracket has obvious resonance at the corresponding frequency based on the test data,diagnosis and analysis,the design of mount bracket has significant influence on vehicle interior noise.Referring to the test and simulation result of the original transmission bracket,topology optimization technology was applied to optimize it,and the first order modal frequency and stiffness of the transmission bracket have been improved as simulation analysis result show after it is optimized.And the road test result of SUV under WOT case also shows that the interior resonance band and noise significantly reduced after the optimized sample installed.

Based on the analysis of the control strategy of extended range electric vehicle,an energy management strategy based on adaptive neuro-fuzzy inference system for multi operating point of extended range electric vehicle is proposed.This strategy combines the advantages of neural network and fuzzy logic system,and uses the neural network to optimize the fuzzy logic system to establish the fuzzy neural network model that allocate the energy of the multi power source reasonably.After vehicle test based on this strategy in the drum dynamometer bench and verification,the control strategy is helpful to save development time,can effectively control the energy allocation of the vehicle,the work point of extended range divice constrained in the high efficiency area,and improve the vehicle economy significantly.

Hardened Mold Steel(HMS) is a sort of typical difficult-to-cut material.With the development of aerospace technology,hardened mold steel is becoming increasingly widespread.Recently,with the application of high power ultrasonic vibration technology and its research progress,ultrasonic machining of hardened materials processing showed unique advantages compared with traditional processing,which has verified by lots of experiments.Focuses on the milling force characteristics during one-dimensional ultrasonic vibration assisted milling of hardened mold steel SKD61 and related experiments were carried out.Research results show that ultrasonic vibration amplitude has obviously influence on milling force,which further proves the advantages of ultrasonic vibration assistance in the machining of hardened materials.Moreover,the influence rules of milling parameters such as rotating speed,feed rate,cutting depth on milling forces were clarified through factor experiments.

Aiming at the difficulty of directly obtaining the load spectrum of excavation resistance through experimental testing,presents a method to obtain the load spectrum of excavation resistance through dynamic simulation.Firstly,the bucket-soil model is established in LS-PREPOST.Then select 3 representative excavation trajectories as the trajectory of the bucket model.Finally,the simulation of bucket digging soil is carried out,the load history of the bucket and three sets of cylinder thrust are obtained.According to the comparison between the calculated results and the measured data from a 36 t backhoe hydraulic excavator,the bucket-soil model is continuously improved,and the more accurate excavation resistance is obtained.The feasibility of the simulation method is verified.

With regard to the QTZ315 tower crane,the vibration characteristics and the first five natural frequencies of the tower crane are obtained by using finite element software ABAQUS,Through the test of extracting 3 point stress finite element model is verified.Applying the El-centro seismic wave on tower crane,tower crane response in no-load and loading condition were calculated by non linear time-history analysis method,The results show that in the 7 degree earthquake wave,the stress and displacement of boom and tower body connection point increase with the lifting load,and the change trend is the same.When the lifting weight is 1.5 t,the crane break off duo to strength failure,but the stiffness is still enough.The analysis results provide the scientific guidance for safe use and reasonable design of the crane.

Targeting at environment and soil pollution issue caused by the plastic film residues after seedling stage crop harvest,propose a seedling stage mulching film recycler.To prevent the damage from resonance in the operating process,construct a rack three-dimension model based on Solidworks,use ANSYS for modal analysis and calculate the frequency of each drive.Compare the inherent of the model.Use finite element analysis method,combine rack material S-N curve theory to make fatigue analysis on the rack.Research result shows that,the deformation of the rack after adding vibration damping plate has decreased for 83 %,the fatigue life of the rack is 1.131 4×10⁶ times,larger than 1×10⁶ times,able to satisfy the requirement of rack’s fatigue life.Through exerting random load to the rack,based on damage formula,work out that the estimated fatigue life of the rack will be 7.3 years.

Rolling-sliding bearing is a new type of bearing which is composes of inner ring,outer ring,cylindrical roller and slider,it have both the advantages of rolling bearing and rolling-sliding bearing.Due to the effect of slider,the bearing capacity is increased,and the lubricating oil film between slider and inner ring and outer ring can play the role of reducing vibration,therefore,rolling-sliding bearing can effectively improve the loading capacity,reduce abrasion and prolong the service life.Simulation of multi-body contact static mechanics of cylindrical roller bearing and rolling-sliding bearing base on ABAQUS software, and comparison show that rolling-sliding bearing can effectively reduce the“edge stress”of the parts in the static force,and can bear a larger load.

Aiming at the urgent requirement of stability,reliability and high accuracy for aerial working platform,the effect of accumulator on leveling performance is developed so as to optimize its leveling performance.First of all,based on the simplified model of leveling system with accumulator,the mechanism,the main parameters acting on performance of accumulator influence the impact and fluctuation of pressure,can be achieved.Hence combined with a simulation model of leveling system acting on the link of accumulation,the effect of accumulator on the leveling performance is analyzed.The theoretical analysis and simulation results consistently indicate that installing the accumulator in hydraulic system and appropriately choosing its main parameters are effective to optimize the restrain of impact and fluctuation of pressure,and are able to improve leveling performance of aerial working platform.

The results of the single-factor experiments shows that the efficiency of small holes machined by the rotary combined ultrasonic and electrochemical machining is better than that by the rotary electrochemical machining at the same machining conditions.In order to analyze the effect of the rotation and the vibration of the cathode to the fluent field of the Rotary Combined Ultrasonic and Electrochemical Machining (RCUECM),the fluent simulation model of the RCUECM was established based on the ANSYS CFX.The results showed that the around flow is produced at the machining areas by the rotation of the cathode,which have little effect on the velocity and pressure of the electrolyte and the suction effect is produce by the vibration of the cathode,which accelerates the flow of the electrolyte and makes the pressure of the electrolyte fluctuate in the processing area,these are helpful for the updating of the electrolyte and the charging of the produces.

Gives out the mathematical model of the three segment base circle involute scroll profile,it adopts the bicircular arc interpolation to approximate and fit the scroll profile and programming by MATLAB software to calculate the coordinates of date points.Thus,the fitting of the combined scroll profile is realized,then the fitting error is analyzed.Through the processing and manufacturing module of Pro/E,the scroll plate is machined.By setting the parameters in the manufacturing process,the manufacturing process is optimized.Compared with the single arc algorithm,the results show that the fitting error is reduced by 90 %,the fitting notes reduced by 80 %,the number of machining arcs reduced by 74 %.The method is universal and practical.It has certain reference significance to the numerical control machining of the non-uniform scrolls.

It is the mechanical polishing technology that can effectively reduce dust pollution,and have a broad application prospects.In order to explore the wet mechanical fine polishing process,effects of wheel speed,work piece speed,normal pressure and drip interval were analyzed by using orthogonal test to obtain the factors affecting surface roughness degree sequence and the optimal process parameters combination.Meanwhile,the experimental and theoretical analysis was carried out on the normal pressure of polishing in order to meet the production needs.It optimized the process parameters and improved the production efficiency.

During the high-speed train surface fluctuation pressure test, the fluctuating pressure measurement method based on sensor array plates is proposed, aimed at eliminating the pressure measurement error which is induced by the interference of the sensor size of itself and the distortion in the pressure tube system. Considering a certain type of CRH high-speed train, establishes a 1 ∶1 model in PRO/E. Starting from hybrid meshes division in ANSYS ICEM and Large Eddy Simulation (LES) used to calculate fluctuating pressure acting on the train surface, the location and quantities of the measuring points in the train surface are obtained. Aforementioned study shows that the fluctuation pressure along the train side has no time correlation in the X-direction. In the line test, the sensor array plates which replace the train surface itself may be of high significance in avoiding the test error caused by the interference of the sensor’s size of itself and the loss in the pressure tube.

Data provided by sensors is always affected by some level of uncertainty or lack of certainty in the measurements.Combining data from multiple sources using multi-sensor data fusion algorithms eliminates the false or incorrect data and exploits the data redundancy to reduce this inconsistency from sensors.Proposes an novel approach to multi-sensor data fusion that relies on combining a Improved Bayesian Approach (IBA) with Particle Filter Algorithm (PFA).Three different methods namely:Pre-Particle Filtering (P-IBA),Post-Particle Filtering (IBA-P) and Pre-Post-Particle Filtering (P-IBA-P) are described based on how filtering is applied to the sensor data,to the fused data or both.A case study of multi-sensor data fusion using optical algorithms is presented.Experimental shows that the shortest running time t was the P-IBA of the decentralized system,overall,the P-IBA-P had the least value of the evaluation function EF and then follows it the IBA-P with a very small difference.This is a reasonable result because the presence of the particle filters,produces estimates with less noise than the measurements and close to the accuracy of the theoretical states.combining Bayesian fusion with particle filtering helps in handling the problem of inconsistency of the data in both centralized and decentralized data fusion architectures.it would be recommended to use P-IBA-P in applications where time is an important factor.

According to the requirements of cigarettes inner package defect detection,eddy-current sensor array is applied to noncontact and nondestructive measurement of inner package defect detection.A high speed solenoid valve with compressed air is used to weed out defect package,which is controlled by programmable controller.It was improved by the experiment result that the system has high accuracy,good reliability and stability,can perfectly meet the needs of actual production.

For the problem that fine-pitch gear parameters can’t be got by the contact measuring method based traditional three-coordinates measuring machine,the inverse calculation model of radius of basic circle based on least square principle and its solving algorithm have proposed by using the coordinate of points on tooth profiles from the image measurement.After figuring out the radius of basic circle,the other parameters of gear can be got by using the other data from the image measurement.Gear pump case analysis show that the proposed inverse calculation method is effective.The study can help the general aviation part maintenance.

Flat gate valve is critical equipment in the well control device.Due to the unreasonable design structure,residual mud is usually heavy in the currently used flat gate valve.If the flat gate valve is not used or it is spared for a period of time,mud will be deposited in the cage.As a result,the valves cannot be shut down orin the process of use,overexert will wrench or even break the valve rod.To solve these problems,a new type anti-settling sand flat gate valve was designed based on Z23Y-700 series gate valve.The new anti-grit flat gate valve adopts double seat design and cleaning hole design,which makes the valve seat easy to be installed and valve cleaning more convenient.To prevent the slurry into the valve chamber,we also add a new gate and fender to the gate valve.Finally,in order todetect the sealing performance ofthe plate gate valve,the pressure test and the hydrostatic test were carried out at 70 MPa.And the valve body cover was subjected to ultrasonic testing and material chemical analysis.The result shows that the designed flat gate valve is reasonable and meets the actual working conditions.

Currently operating tools with deep-sea manned submersible sampling become a trend,through the analysis of the Jiaolong manipulator and manned submersible device with different tools,design a new deep-sea mineral cutting sampling equipment.The manipulator and carry knives cutting sampling system are analyzed in the workspace and trajectory by MATLAB,compare whether pick up tools work space change,and through the ADAMS to analysis the stress of several different mechanical operating posture,has a guiding role to the positioning of the bottom of the submersible and the operation posture of the manipulator's in cutting operation.

For the unstable cutting,electrical instability,resulting in abnormal discharge between molybdenum wire and conductive block problem processing Aluminum Alloy,based on the DK7732 type line cutting machine as an example,from the preset feed speed,electric parameters,processing system,scouring the way by the power and other aspects of analysis,put forward the improvement Aluminum Alloy line the cutting process measures and experimental research.

Through the construction of the electric shifting actuator drive efficiency test bench,the average transmission efficiency of the electric shifting actuator is respectively tested in two working conditions of fixed time-variable load and variable time-constant load.Through the analysis of the experimental results of average efficiency of the worm transmission,the gear sector transmission and the whole transmission efficiency under two working conditions,found that the average transmission efficiency of worm transmission and overall transmission are low,and the gear sector of transmission efficiency is high;the torque has a great impact on the average transmission efficiency which increases with the torque increasing,but the speed has little effect on the average transmission efficiency.