As an alternative to fossil energy, wind energy has attracted wide attention and widely application because of its less land occupation, low cost of power generation and low impact on environment. The wind turbine's blades, which convert wind energy into wind turbine kinetic energy, play a decisive role in the rotor's power coefficient. This article briefly introduces some achievements of the research on wind turbines, such as the special airfoil on blade, the method for calculating chord length and torsion angle as well as the synergistic device for blades. Some methods are explored; their theoretical basis and working principles are introduced.

The adaptable-function mechanical system is usually characterized with multiple functions and complex overall structure. Therefore, it is feasible to apply the modular design in terms of product design and management. Since currently the research on module identification for such products is rare. In this article, the correlation matrix of functional structures is worked out by means of the analysis and calculation of certain features of the adaptable-function mechanical system, including the usage of each adaptable function, the similarity of the corresponding behavior, as well as the manufacturability of combined functional structures. Then, based on the correlation matrix, the method of fuzzy clustering is applied to work out various module-identification schemes. Finally, the mathematical evaluation model is set up by calculating the module-connection complexity and the redesign complexity, through which the schemes are evaluated and the optimal scheme is obtained. By the modular design of a household toolkit with various tools, the optimal module-identification scheme is identified for adaptable-function combined toolkits, and thus the proposed method has proved feasible.

Since such problems as inconvenient application and complicated numerical calculation are found in the design of fit pressure of diaphragm coupling with small-size closed interference structures, this article focuses on the characteristics of the general solution of the assembly-pressure mathematical model of the closed interference joint, which are discussed in the current literature; the analytical formula for pressure distribution of the thin-walled closed interference joint is worked out, the undetermined coefficients are solved, and the method of how to solve the bending moment and the shear force at the interference structure and the diaphragm joint is given, and thus the analytical expression of large non-linear interference fit pressure is realized. Finally, an example is given to verify that the analytical formula is correct, which greatly facilitates the design and application of interference joint.

It is difficult to improve the acceleration of macro-micro motion platform. Thus, in this article, based on the series of ideas, the super-accelerating macro-micro motion platform with the floating stator is set up, which is driven by “ more macrosingle micro-more macro”. The structure of this platform is explored and the whole dynamic model is worked out. Then, the energy attenuation of this platform is identified by means of different drive modes and floating-stator modes. The analysis is conducted on the changing law of energy attenuation by the level number n of different voice coil motors. The super-accelerating macro-micro motion platform with n = 1 is selected for the experiment. The results show that the energy-attenuation rate of the system β₁₁ is about 89.32% under the double floating-stator mode and the energy-attenuation rate of the system β₂₁ isabout 82.6% under the single-floating and single-fixed mode; the analytical error is about 3.75% and 9.03% respectively. Therefore, the super-accelerating macro-micro motion platform under the multi-level floating-stator mode has desirable vibration suppression.

In order to explore the low-speed frontal-collision crashworthiness of pure electric SUV and improve its insurance level, in this article, according to the European RCAR low-speed crash test procedure, the ANSA software is used to set up the low-speed fr ontal-collision finite-element model for pure electric SUV; by means of the LS-DYNA and HyperView software, the analysis is conducted on the deformation and energy absorption of the key components of the front end of electric SUV. For the problem of insufficient crashworthiness, the structure and parameters are optimized from the aspects of rigidity and strength. The results show that the crashworthiness of the key components of the front end improves as a whole, the energy absorption and deformation obviously improve, and the compression distance of the energy-absorption box is 111.8 mm, which is close to the minimum distance of 110 mm between the anti-collision beam on one hand and the fan and its mounting plate on the other hand. As a result, the extrusion exerted on the fan significantly reduces. The plastic deformation of the front longitudinal beam reduces from 45.41% to 12.52%. Since after optimization, both the compression distance of the energy-absorption box and the plastic deformation of the front longitudinal beam fail to satisfy the the RCAR test requirements, the multi-objective optimization is applied to further optimize the overall thickness of the key components. The results show that the RCAR test requirements are met finally, the compression distance of the energy absorbing box is 105.44 mm, the plastic defo rmation of the front longitudinal beam is 5.04%, and the front end has a higher standard of crashworthiness and lightweight effect.

In this article, by the research on the operation status of the prototype of the heavy pressure centrifuge, the cause of the damage to the mechanism's inner mechanical seal of is identified. By optimizing the structure of the inner sealing system, dry friction turns into liquid lubrication, which improves the working environment of the sealing structure, realizes its continuous flushing and lubrication, and prolongs the service life of the mechanical seal.

In this article, the overall scheme of the test bench is worked out according to the performance test and analysis of the refrigerator's linear compressor which is independently developed. Then, the performance parameters of each key component in the test system are analyzed and selected. Both software and hardware test platforms used for the test system are set up. The linear compressor is subject to performance test according to the national standards. Thus, the relationship between the cooling capacity and various parameters under different working conditions is identified. The test results render data significance for both the analysis on the compressor's performance and the optimized design of the compressor's structure.

The multi-wire cutting machine is the leading equipment in the semiconductor material cutting industry, and the dynamic characteristics of its spindle system have great influence on the processing quality of semiconductor chips. The triangular support in the spindle system is the carrier which is used to support the spindle, and its dynamic performance directly affects the the spindle system. In this article, the SolidWorks software is applied to work out a triangular-support model, and the ANSYS software is used for the static and modal analysis, in order to find out the insufficient stiffness of the triangular support. Based on the multi-objective optimization design of the connecting beam and the lightweight design of the front supporting plate, the triangular support, with a small mass, has improved dynamic and static performance.

How to improve the processing accuracy of difficult-to-clamp parts with weak stiffness is a common concern in terms of academia and industry. In this article, a device is developed, which depends on the magnetorheological effect to provide a flexible support with a shape suitable for its weakly-rigid parts to obtain a higher standard of machining accuracy. The supporting force is closely related to the magnetic induction intensity generated by this device, so the magnitude of magnetic induction is the key to the performance of the flexible auxiliary support device. The finite-element method is applied to explore the influence of the excitation core's structure, the coil energization mode and the machining workpiece materials on the magnetic field at the working gap of the device. The intensity of magnetic induction with different parameters is simulated. Based on these results, the structural parameters of the magnetorheological flexible auxiliary support device are identified. The magnetic-circuit simulation results show that the intensity of magnetic induction at the working gap meets the design requirements and provides auxiliary support for a higher standard of machining accuracy.

In this article, in order to solve the maintenance problem of metal pillars in the canopy of high-speed railway stations, a magnetic-adsorption pole-climbing robot working on the metal pillars is developed. This robot can move forward, turn 90°, change its diameter and go back on the metal strut. It is simulated with the multi-body dynamics software Adams, so as to verify its feasibility, and the magnetic-adsorption force is calculated by means of the ANSYS software. With the actual situation of the metal strut surface taken into account, the simulation experiments of each action are completed. Furthermore, since the magnetic-adsorption force changes with the different working gap, the SPLINE function is adopted to set the magnetic-adsorption force; the reasonable walking speed, the changing range of the magnetic-adsorption force and the range of the working gap are finally identified. The simulation results provide reference for the design and manufacturing of magnetic-adsorption pole-climbing robots.

A six-dimensional force sensor at the base is affected by such factors as the gravity and inertia of the moving robot, which causes the zero change in position. In this article, the algorithm of dynamic force compensation for the six-dimensional force sensor at the base is worked out. Firstly, the algorithm of gravity compensation is derived when the robot is stationary, and the robot model is set up by means of the D-H parameter method and the Newton-Eulerian method for structural analysis. The universal algorithm is derived for the sake of dynamic force compensation when the robot is moving. Secondly, with the KUKA sixdegree-of-freedom robot as an example, the theoretical curve of this numerical example is identified. Finally, the ADAMS software is adopted for dynamic simulation, in order to work out the dynamic force curve of the six-dimensional force sensor at the base when the robot is moving. Thus, it is verified that the theoretical analysis on the algorithm of dynamic force compensation is correct.

In this article, the analysis is conducted on the structure of the hub motor's inner stator, and the processing scheme of coil-winding and the structural scheme of the coil-winding machine are worked out. The moving law of the coil-winding machine is explored; different calculation methods of acceleration and deceleration are compared. The speed-S curve is selected for controlling the arrangement servo system, in order to avoid such prominent problems as uneven distribution and accumulation of arrangement lines when the arrangement axis is rotating; the process of setting the parameters of acceleration and deceleration is developed. Finally, according to the control requirements of the coil-winding machine, the control system based on the “ touch screen + motion controller” is set up; the selection and design of the systematic hardware, as well as the design of the systematic software including the PLC ladder diagram and the man-machine interface, are completed. The results show that the newly-developed inner-stator coil-winding machine, with such advantages as high automation, stable operation and high efficiency, meets the production needs and reaches the high-quality requirements.

In this article, for the reduced cost of tracking devices, a solar tracker with two-axis interlock is developed. Firstly, based on the changing laws of solar elevation and azimuth, the theoretical motion trajectory of the slider on the solar tracker is analyzed, and the geometric parameters of the solar tracker are identified. Then, when m×n solar tracker arrays are installed, the shadow interference between the panels is explored, and the method of optimizing the installation spacing and the panel width is proposed. Finally, the tracking accuracy is tested. The research shows that the tracking accuracy in the aspect of the solar elevation is -0.5°~0.7°, while the tracking accuracy in the aspect of the solar azimuth is -0.4°~0.3°. The solar tracker ensures full tracking throughout the year at high latitudes. When the solar azimuth is greater than 90° and less than -90°, full tracking cannot be ensured.

In this article, in order to meet the needs of the elderly, the weak and the sick, a nursing robot is designed. With the focus on the key part of the robot's dual arms, the overall solution is worked out. The analysis is conducted on the rotational constraints of the joint module, in order to identify the angular range of each joint. The mathematical model of the nursing robot is set up with the aid of improved D-H modeling, and the kinematic analysis is carried out. The control system of the nursing robot is designed. Based on the TwinCAT3 software, the PLC motion-control program is formulated, the electronic gear is called, and the coupling coefficient is set, so that coupling control is realized on axis motors on the nursing robot's dual arms and the lifting test is completed for the prototype. The experimental results verify that the design of the nursing robot's control system is effective, which will lay a solid foundation for future optimization.

As an operating tool, the mechanical gripper is more and more important with the widespread use of robots. In this article, the three-finger mechanical gripper is designed based on the underactuated system and by means of tendon rope transmission. The design simplifies the complexity of the gripper structure, and the gripper is able to grasp and pinch objects. Firstly, the three-dimensional model of the three-finger mechanical gripper is set up by means of the SolidWorks software. The gripper is composed of fingers and the palm linked by a spindle. Each finger includes three knuckles; the first knuckle and the third knuckle are connected by the flexible second knuckle. Secondly, the statics is analyzed, and the conditions of stable grasp are identified. The kinematic simulation is conducted based on the robot's toolbox in MATLAB. Finally, the gripper is tested, and the results show that it has desirable feasibility and adaptive capacity.

Based on the grinding process of face gear, the tooth-surface equation is derived from the high-order parabolic rack, and the tooth-surface equation of the pinion is worked out by means of the modification principle of the high-order parabolic curve. According to the tooth-surface equation, five tooth-shape parameters are selected and their effects on the meshing performance of the face-gear pair are analyzed respectively. The results show that the contact path on the tooth surface of the two-way high-order parabolic curve is S-distribution, and the position and direction of the bearing contact are changed by different toothshape parameters. The upper part of the high-order transmission error curve is flat, the transition at the conversion point is smooth, and this error curve indicates that the impact can be effectively reduced. These results provide ideas and methods for the tooth-surface modification design and ensure the improvement of the face gear's meshing performance.

In this article, a 6-axis industrial robot driven by the stepping motor is designed based on the D-H model, and the model of the robot's core components is worked out. In order to meet the design requirements of the industrial robot, the method of circular feedback is used to optimize the design. Such tasks as motion simulation, finite-element analysis, interference collision detection and stress calculation are carried out on this robot, so as to verify whether the robot's structure is rationale. It provides basis for the development and improvement of industrial robots.

Since the method of subjective evaluation has such drawbacks as high cost and poor reproducibility in evaluating the quality of vehicles, this article explores the characteristics of the evaluation of driving-quality, and the objective evaluation system is applied to evaluate vehicle performance. The quantification method based on fuzzy hierarchy is proposed based on AHP and the fuzzy comprehensive method, so as to quantify the evaluation of driving quality. Based on the experience of experts, the weights of evaluation indicators and content are quantitatively analyzed, and the objective evaluation model of driving quality is worked out based on the hierarchical-fuzzy analysis. Furthermore, the experimental results show that this method achieves the objective evaluation of driving quality, ensures a quick feedback, provides further guidance for calibration, as well as renders reference for the evaluation of vehicle performance.

In this article, with the focus on the light bus' brake pedal, the force analysis is conducted on the lower limbs and the benchmarking analysis is carried out on the competitive vehicle. Thus, poor operating comfort is mainly caused by minor angle of the ankle. Through the modification of the pad bracket's radian, the welding angle and the pad shape, the brake pedal has improved in design. Such tasks as ergonomics check, finite-element analysis, bench test and subjective evaluation are performed on the new brake pedal. While meeting the design requirements, the brake pedal has a higher standard of operating comfort.

In the innovation design process of mobile transportation robot (MTR),in order to meet user requirement of MTR structure, extension innovation method was used to perform formalized and logical research on the design of MTR combined with the knowledge of robot design. The extension design innovation generation method that mapped from user requirement affair-elements to function affair-elements of MTR,and then from function affair-elements to structure relation-elements was proposed. In the evaluation and selection of better structure ideas,ROS simulation technology was combined to provide a convenient and efficient screening method for MTR structure design. The combination of extension innovation method and ROS simulation could improve development efficiency of enterprise robot products.

In order to solve the shortcoming of strong subjectivity in TRIZ causal chain analysis,correlation analysis and extension clustering method of extenics were used to express causal chain analysis using parametric primitives. The problem was analyzed objectively based on parameter concepts and quantitative methods according to relative analysis principles. Key problems were screened by extension clustering to determine final key problems. And TRIZ conflict resolution theory was used to complete the problem solution. The combination of extenics and causal chain analysis not only enhanced the objectivity and logic of causal chain analysis, but also accurately assisted designers to find product problems. A forklift was taken as an example to verify the feasibility of this method.