The kinetic characteristics of a capsule-like robot (CLR) with a spiral surface driven by a rotating magnetic field are studied. Firstly, the operation principles and design of the whole system are introduced and the formulas to calculate the torque acting on the CLR by a rotating outer magnetic field are given. Then, a tester is developed and three CLR samples embedding a pair of magnetic bars are made. The samples have different sizes. Several types of viscous silicon oil simulating a body fluid are compounded in experiments. Finally, some experiments are carried out to prove the correctness and feasibility of the design. Some conclusions can be drawn from the experimental results. When the intensity of outer magnetic field is about 6.281 A/m, active torque on CLR samples is about 1.0 mN·m. From analysis, three factors are found to determine the resistance torque acting on the CLR. They, ordered according to their importance, are  namely diameter of a CLR, rotational speed and fluid viscosity.

TRIZ theory utilizes 40 inventive principles to solve contradiction and its inventive principles have universality. To guide electrical creative design, on the basis of summarizing electrical design regulation, a great deal of design examples are sieved according to the later 20 inventive principles of the 40 TRIZ inventive principles. It enriches the engineering design database of inventive principles in TRIZ and offers inventive principle references on solving contradiction in electrical design for designers. 

Aiming at the design and manufacture of new-type fixed semi-automatichay baler, the working principle and structure of the key parts of hay baler, including compressing mechanism, intake mechanism, separate-bundle mechanism, are expatiated, among which the intake and separate-bundle mechanisms are its features. These two mechanisms require strict movement relationship with compressing mechanism, which increases design difficulty. Intake mechanism adopts horizontalsemi-automatic feeding to lower the height of loading hay and this accords with body engineering. The lever-group shift lever interlock separate-bundle mechanism has simple structure and is easy to operate. Additionally, it enhances thesecurity of flashboard separate-bundle. 

An asynchronous distributing method and its basal control algorithm of the automatic distributing system for cigarette cartons were presented which the action of automatic distributing units and the motion of transmission device were planed as a whole. According to the method, the transmission device was designed which moved step by step and consisted of a series of containers connectedeach other. The asynchronous distributing method was compared with the synchronous method of distributing system. A  project of the distributing unit was developed and a slideway-style distributing unit was designed in which the cartons fed by means of the effect of bevel and gravity without power pushing and thetwin-executor output assembly can send out one or more cartons once. The data of basic distributing capacity based on the asynchronous method were measured in distributing test. The test also indicated that the system can achieve distributing productivity more than 10 000 cartons per hour.

Underwater skirt pile gripper (USPG) was a hydraulic gripper widely applied in construction of offshore oil platform. Check ring joint (CRJ) structure was utilized in USPG. Optimization design based on multi-body contract finite element analysis was introduced into structure design of CRJ in USPG. The contact finite element optimization model based on Augmented Lagrange method was established by ANSYS parametric design language (APDL). Optimization results showthat this structure optimization method based on nonlinear finite element analysis is effective in joint structure design and the engineering demands are well satisfied.

The principle and two structure schemes of vane MRF damper designed base on conventional vane hydraulic damper are presented. Magnetic field finite element analysis of two different schemes of dampers is conducted through ANSOFT and then a scheme relatively ideal in magnetic field distribution is obtained. Additionally, optimization in structure design of vane MRF damper is completed by using the method of magnetic field finite element analysis, which will effectively enhance performance of damper. The result indicates that this method is valuable in magnetic circuit design.

According to structure and working theory of two-stroke engine and four-stroke engine, theory of engine with multiple-stroke working mode is put forward. Its working theory, working process and continuous changeable compression-ratio in a certain range are described. Combined gas exchange with three different valves is analyzed through numerical simulation. This provides references for selecting gas exchange forms of engine with multiple-stroke working mode.

In the development of visual system in staker-reclaimer, establishment and management of scene modeling will directly influence the performances in immersion, interaction and real time of the whole system. Mainly utilizing MultiGen Creator, simplification and management of staker-reclaimer’s 3D model are carried out from the two perspectives of decreasing files’ sizes and increasing rendering speed. Moreover, some key technologies such as hierarchy, degree of freedom and external reference are discussed too. These technologies have been successfully applied in system development and achieved good simulation effect.

The model of gear profile curve and gear transition curve are the difficult but key point of gear 3D solid model. Current modeling methods are complicated for operating and cockamamie for computing. Moreover, they are not suitable for gears manufactured by different cutting tools. Based on gear generation principle, a new method to establish accurate 3D solid model of cylindrical gear by mechanism function of Pro/E is proposed. Taking the manufacture of spur-gear with pre-grinding hob as an example, this method is introduced in details and the accurate 3D solid model is set up. This method can model different varieties of cylindrical gears manufactured by any cutting tool conveniently and rapidlybut not having to deduce the equation of involute and transition curve. It provides references for FEA modeling of complex surface parts based on engagement principle, especially for CAD/CAE modeling and analysis of complex surface parts.

Electrochemical machining (ECM) of accelerando rifle needs repeating experiment revision, and is hard in experiments and time consuming in development. Mathematic model is established according to geometric parameters of machining objects and ballistic trajectory equation. Models of cathode working teethand artillery tube are established in Pro/E and then induced into VERICUT. Machining parameters and NC system are set up in VERICUT and then cutting tool’s trajectory G codes are added to carry out simulation of machining process, which is used to inspect whether the shape of cathode teeth is reasonable and whether there are over/owe cutting problems in machining process. Research indicates thatadopting VERICUT in ECM cathode design is a feasible way.

The flow field of ventilation system for flow-bulb hydrogenerator was simulated by applying CFD software FLUENT. And its 3D model was established by using the standard κ-ε turbulence model as the physical model of flow. The reliability of numerical simulation was validated by comparing simulated resultsof air distribution with the measured data from motor. This research indicates that under reasonable simplification, the ventilation system of flowbulb hydrogenerator could be simulated accurately by CFD, which provides references for its design and optimization.

Solar radiation heat flow is the biggest influence leading to reflector surfaceof on-orbit antenna’s deformation and its declination on electrical performance. Aiming at the geometric characteristics of the reflector and timedependence of antenna orbit position, parameters of angle between solar radiation light and orbit surface and time of antenna’s entering and leaving the earth shallow are discussed. In light of paraboloid equation and sunlight radiationvector, analysis on self-occlusion of parabolic antenna is carried out by adopting geometric method and then corresponding judging references are given. Meantime, unchangeable direction of antenna reflecting surface when facing ground is achieved by utilizing coordinate transformation. This method implements real-time analysis of solar radiation heat flow on parabolic antenna reflector on-orbitand makes it possible to accurately analyze its thermal deformation and thermalflutter.

Research on compound stress intensity factor (SIF) is a crucial subject in linear elastic fracture mechanism. Taking calculation of SIF of semi-elliptical surface crack (SESC) in circular tube under torsion and bending as an example, there is still no exact analytic solution. Considering stress singularity in the tip of crack, 3D singular elements are set along the front edge of crack manually, and then , Ⅱ, Ⅲ, SIF of SESC in circular tube under torsion and bending is calculated by 1/4 displacement of 3D FEA method. Furthermore, its changing rule with the increase of crack depth is analyzed. By utilizing this model, SIFs of related models are calculated and then the results are compared with those of experiments, which are very close.

According to the features of distribution, variety and multi-condition of air conditioner test system, an application scheme with DS100 field controller is presented, in which the DS100s with FIELDBUS and fast parameter auto-tuning are as low-layer data acquisition and control units and an industry computer is utilized as upper-layer monitor unit. Additionally, basic features of DS100 field controller and its adaptability for this test system are analyzed; feasibility of utilizing FIELDBUS technology to implement field test and control equipment information transfer is discussed. Moreover, a token transceiver schemebased on MODBUS protocol is proposed; and practical technologies and software design method of this test system is illustrated. Finally, test results on this air-conditioner test system are given.

To solve the problem that domestic AGVS cycle deadlock seeking algorithms’ insufficiency in discovering all kinds of deadlock, an improved algorithm using taskresource (T-R) graph is proposed. The improved algorithm is as follows: firstly, according to relative position change and situation of task execution, AGVS is modeled by R-Tgraph; then, in light of the T-R graph characteristics of cycle deadlock, all kinds of cycle deadlocks are found at any time. Once finishing searching all T-Rgraphs, the algorithm can find all cycle deadlocks in AGVS. Examples’ validation and theoretic analysis both indicate that this algorithm manages to find all deadlocks and solve the shortages of previous algorithms. According to the improved algorithm’s control rules, generation of new deadlocks can be effectively avoided. Moreover, after small revision, this algorithm can find both the cycle deadlocks and the non-cycle ones.

An irregular parts layout method based on niche genetic algorithm is proposed. Firstly, the proposed method converts 2D irregular parts layout into rectangular part layout problem by adopting rectangle enclosure algorithm. Then, by integrating genetic algorithm and niche technology, the best sequence of the shaped parts and their optimal rotating angle are sought. Finally, automatic layout is implemented by utilizing “the lowest horizontal and filling algorithm”. Illustrations demonstrate that this algorithm is effective.