A process for resolving complex problems in products with ARIZ was described， and a kind of analysis process for product problem evaluated was put forward. The innovative design of compound hydrocyclone was mainly concentrated on the static unit construction， rotating vane， overflow system， liquid supply， separation structure arrangement and so on. The working principle of the compound hydrocyclone was described， and the component model of compound hydrocyclone was built with computer-aided design software Pro/ Innovator 50. It has been found that the main reason of the energy loss and low separating efficiency was the separation structure design and layout that was not reasonable. Finally， an effective structure design and layout scheme of separation structure was discovered using ARIZ process. It is proved that the generality and efficiency of ARIZ is verified to resolve complex problems for products．

Peristaltic pump is a simple， widely used cubage pump. Since it was carried out in 1950s， a lot of patents have been authorized. Based on the analysis of these patents， we concluded 7 key points in peristaltic pump design: inconvenience of hose installation/replacement; short life of hose; the backward liquid in hose; leakage of the bodypreservation; spindle by the radial force; poor adaptation to hose; export pressure fluctuation. Then the solutions to these problems had been concluded. In future design of peristaltic pump, these solutions can be reviewed in order to open mind， avoid failure and improve design quality and response speed．

In order to research the synchronous control of multiaxis drum system， a kind of electromechanical cosimulation analysis method of independent servo drive multiaxis synchronous control system was presented. Multiaxis drum system model was built and its dynamic characteristics were analyzed. Based on analyzing the control system， the multiaxis synchronous control model was built and controller parameters of three loops were tuned. Multiaxis synchronization error between adjacent axes was analyzed with masterslave control structure. The influence of coupling on control system was analyzed as well. Simulation results show that synchronization errors were in permissible range and errors were reduced by adding coupling control. The experimental results indicate that the synchronization performance of multiaxis drum system is right and meets the design requirements well.

Due to the complexity of the parallel mechanism， predicting the kinematic performance of the robot under actual planning trajectory by theoretical calculations is very difficult. In order to forecast kinematic performance of the 4RUPaR highspeed handling parallel robot under actual handling trajectory， virtual prototype of the parallel mechanism was built in ADAMS. Then pickplace trajectory planning and forward inverse kinematic simulation were made. By analysis of the simulation results， we forecasted kinematic performance indicators of the mechanism under actual handling operation environment which provided a reference and basis for mechanism optimal design， control strategy study， planning trajectory optimization and physical prototyping. The results show that the planning trajectory is reasonable and the kinematics performance of the mechanism is good.

In order to improve the driving properties of the large gap magnetic drive system， the oriented silicon steel sheets was used to be the electromagnet core instead of the nonoriented one. Then the driving torques generated by the two kinds of the electromagnet cores was analyzed by ANSYS， and the driving properties of the two kinds of electromagnet cores were compared through experiment. The experimental results show that the drive torque generated by the electromagnet core of the oriented silicon steel sheet is higher than that of the nonoriented one in the case of the same current， to provide a basis of the optimization on the electromagnetic structure and size．

Because repeatedly debugging the unloading way wastes time and energy, using only one fixed unloading way to deal with the 4000tdieforging press which works under different working conditions, leads to apparently shock vibration. In order to maintain the press’s hardware and optimize the unloading control mode to get the best unloading effect in different initial unloading pressures, we put forward a way that deduced the shockfree unloading curve based on the mechanism of pressure relief, then got the voltage control mode through converse modeling and simulation. The results show that, the optimal way to release the energy pressure is in the sine way, and in the same way we get the other voltage control mode under different initial pressures when the energy is released in the sine way. This research provides a theoretical guidance for engineering practice and provides a reference for operation in the factory.

As one of the important parameters，amplitude of linear vibrating screen is directly related to efficiency and working reliability of the vibrating screening. Considering the randomness of the exciting parameters, based on the stochastic model, the vibrating screen structure amplitudes influenced by random exciting parameters (eccentric block mass moment, exciting force direction angle and exciting frequency) was researched. The relative mean value deviation factor and coefficient of variation was introduced, the variation law of amplitude was analyzed quantitatively. The results show that amplitude mean value is affected little by the mass moment, whose dynamic deviation degree can’t be ignored yet; exciting force direction angle random is the most sensitive excitation parameter which causes the amplitude variation. When eccentric block mass moment, exciting force direction angle, exciting frequency exist variation synchronously and the coefficients reach to 15%, amplitude variation gradient is high, amplitude mean variation and the dynamic deviation degree are very big. The vibrating screen structure amplitude variation caused by random factors in the process of manufacture and installation, should be analyzed and effectively controlled.

To meet the needs of air defense weapon testing and the army air defense training， a new kind of umbrellatype deployable air target was designed based on the concept of deployable structure.The structure scheme was put forward using conceptual design method.Sleeves and braces were used to realize the axial and radial directions respectively and was driven by springs.The target stayed in collapsed state before targetsupplying; when the target was released in the air, it could automatically unlock， deploy to designed position and lock again to begin targetsupplying.The simulation of the deployment process was analyzed to prove the feasibility of the scheme.Free modal analysis of the deployed structure was carried out with finite element method and the first 7 order modes were analyzed. A reducedscale model was made and the automatic deploy experiment in the air was carried out.The research results show that the structure can deploy rapidly and successfully in 28 s; the structure can automatically unlock and the linkage work well to deploy in two directions successively with only one unlocking operation.The work of model making also provides experience for the further study．

A matrix iteration method is proposed based on the analytic method of segmental catenary for the suspension cable. The method was developed from the Newton iteration method for the nonlinear equations according to the analysis of different common methods. The tangent stiffness matrix of the iteration method was presented and the characteristics of the stiffness matrix were discussed. Then the iterative calculation process of suspension cables formfinding for the specific engineering problem was listed. The method offers significant improvements on accuracy， efficiency and calculation amount of the solution， which can meet the needs of practical engineering. The results of the Newton iteration method are compared with the numerical results in other literatures and the contrast verifies the reliability of this method. The method is suitable for the analysis of suspension bridges， cargo ropeways and other various types of cable structures.

Joint clearance is the most important uncertainty to affect on kinematic and dynamic performance of mechanisms. To accurately evaluate the kinematic reliability of mechanisms with joint clearance， the key is to create reasonable and effective probabilistic model of joint clearance. Taking the function generator mechanisms with joint clearance for example， the structure error and random error were considered to create the motion error function of mechanisms. The Cut Hybrid Dimension Reduction Method was applied to handle the correlation of joint clearance variables and then the equivalent probabilistic model of motion error was established. The First Order and Second Moment method was used to solve the point kinematic reliability of the mechanisms. The results show that the Cut Hybrid Dimension Reduction Method is validation for solving kinematic reliability of planar function mechanisms with joint clearance when the structure error and random error are considered．

In order to study cracks and fractures which often appear on semitrailer frame， we implement fatigue life analysis and locate fatiguefailure position of semitrailer frame. The finite element model of semitrailer frame was established， static and dynamic characteristics were analyzed by ANSYS software. Based on the fatigue theory of reliability and the above FEM results， the fatigue life of frame was analyzed by FESAFE. Then the fatiguefailure position of the frame was located and showed by checking fatigue life nephogram and safety factor nephogram. The research results show that the longitudinalbeam near fifthwheel in frame often has fatiguefailure. We supply a new method for frame of fatigue life analysis and provide a theoretical basis for frame of design optimization．

How to reasonably plan avionics product BIT（builtin test）development process， is an important problem to be solved for the BIT design. Firstly， the shortcomings of existing BIT design workflows were analyzed， and we pointed out the existing BIT design flow deficiency; Secondly， the workflow of a BIT design was established with related work items sorted out， and we determined the avionics product development plan stage and prototype sample/sample stage of the BIT design projects; Thirdly， based on the development flow of a avionics product， a general workflow of BIT design throughout the product development cycle was established. Through the establishment of BIT development workflow， we improve the avionics products BIT design work maneuverability， and high relativity for BIT design. On the other hand， it can also save the time cost and reduce the development cost by establishing BIT development workflow. More important is that it provides a reference example for the avionics BIT development workflow. An integrated control and management system taken as a case valid statistical estimation method is adopted in the product design application process. With the application of the above BIT design workflow， the validity of this workflow is verified．

The actual rotate speed is the differential of angle， so the designed observer based on the rotate speed would introduce differential mutation. A novel load torque reduced order observer design method was proposed for the practical application of PMSM （permanent magnet synchronous motor）. The new method took the directly measured corner as the known observe object， avoiding the introduction of differential mutation， and proportionally feedback compensated with the observed load torque to weaken the influence of the load disturbance to the control performance， realizing antidisturbance adaptive control of sliding mode control. On the one hand， we obtained the theoretical calculation method of the proposed strategy; on the other hand， we established discrete simulation system approaching to the reality based on one application case. Simulations verify the no overshoot and fast response characteristics of the observer， and validate the fast dynamic response and good resistance to outside disturbance ability and high robustness characteristics of PMSM speed control system with the method proposed by comparative analysis with the ordinary SMC(sliding mode control)．

In order to achieve the multi degree of freedom and nonlinear movement of the vehicle， three degrees of freedom and fourwheel steering model was built up under Simulink environment. For most control methods need to rely on the defect that the controlled object should be an accurate mathematical model， we put up the fuzzy neural network which is selfassociated， selflearning， selfrecognition and adaptive for fourwheel steering control strategy. With rotor angle of front wheel and speed of the vehicle as input， the rotor angle of rear wheel as the output， we built the simulation model for the training. Hybrid method was used to acquire the sample selfadaptive fuzzy neural network controller， and compared the controller with that which is obtained under the feedback control of the front wheel steering， proportional control and yawing angular velocity. Results show that the selfadaptive fuzzy neural network control makes the vehicle mass center sideslip angle tend to zero when the speed is from low to high， and it has strong robustness. In anglestep， linemovement experiments， the control effect is better than that of the front wheel steering and proportional control and yawing angular velocity feedback control， it greatly improves the control performance of the vehicle．

Aimed at the problem that the robustness of clutch engaging control of AMT for starting is poor due to the attrition of clutch， the change of working temperature， the change of vehicle load， the change of traffic conditions and so on， we proposed a method of engaging control of AMT clutch for starting based on speed feedback， made speed as the target of clutch engaging control. According to the input of accelerator pedal， the AMT controller generated the target speed of starting process， detected the change of the speed in realtime， adjusted the engaging speed and engagement dynamically with fuzzy control method according to the error of real speed and target speed， to make real speed track the target speed and change gently. It improves the robustness of clutch engaging control of AMT for starting.

Circuit for broken rail detection suffers from the unbalanced traction return current in the conducted interference. In order to reduce the reference of the unbalanced traction return current to circuit for broken rail detection， based on analysis of characteristics of signal current of circuit for broken rail detection in normal rail and broken rail operation modes and distribution rule and characteristic of the traction return current under AT power supply， interference mechanism of the unbalanced traction return current to circuit for broken rail detection was deeply studied. In order to guarantee the normal work of circuit for broken rail detection， some protective measures were put forward from equipment selection， engineering design and operation maintenance. Antiinterference circuit which was designed based on the principle of electrification interference was simulated and analyzed. The result shows that the circuit which is installed the receiving end of circuit for broken rail detection effectively reduces the interference which enters into the receiving equipment. It makes the unbalanced traction return current not affect result of judgment of broken rail. This improves the antiinterference ability of circuit for broken rail detection．