Bionic innovation design refers to the innovative design of products by extracting biological information in nature, which has great application prospects. The traditional bionic innovative design method mostly applies a small amount of biological information, which is difficult to efficiently retrieve a large amount of biological information, and it is difficult to produce innovative design solutions due to the limitations of designer’s thinking and related professional knowledge. To solve the above problems, it is necessary to propose an integrated innovative design method based on a large number of biological texts from website to assist designers in making bionic innovative design. Based on this, an innovative design method was proposed for mapping network biological texts by user requirements to obtain multi-disciplinary requirements and multi-mapping targets design scheme. Firstly, based on the neural network model, the knowledge in the internet biological text was extracted and stored in the database. Then, the keywords of product design were obtained according to the multi-disciplinary requirement mapping method, which was mapped to internet biological texts by using the fuzzy mapping method to obtain engineering design solutions. Finally, the code was programmed and the corresponding user interface was designed according to the above method, and the feasibility of proposed method was verified by taking the innovative design of the tubeular type air heater as an example. The results showed that the heating effect of optimized tubular type air heater was significantly improved, which indicated that the proposed method could solve the current key problems of traditional innovative bionic design, such as the lack of biological text information, the limitation of designer’s own thinking, the lack of integrate interdisciplinary expertise and the unsatisfactory generation of product solution. The proposed method can assist the designer to complete the bionic innovative design of products.

A position detection method of positioner based on fiber-optic strain sensor was proposed for the position change of positioner in aircraft assembly process. Through the fiber-optic strain sensor, the strain of jig body and key characteristic areas of the positioner components and positioner position variation were collected in real time, and the collected data were analyzed and processed. BP (back propagation) neural network was used to establish the mathematical model between the stress variables in different areas of aircraft jig and the positioner position changes.A test platform for position detection of jig positioner was built on a certain type of process equipment, and the neural network model of position detection with positioner loaded in a plane and at space was established based on the test data. The experimental results showed that when the number of neural network samples was fixed, the prediction accuracy of the model to the position of the positioned was related to the loading migration angle. The smaller the migration angle, the higher the load coverage and the higher the model prediction accuracy. When the load position was 30° in the plane and 45° in the space, the prediction accuracy of the established neural network model for the position of positioner met the positioning requirements, which verified the feasibility of the proposed method. This method abandoned the traditional way of direct measurement with digital equipment, made up for the defect that individual positioned position couldn’t be detected due to line of sight occlusion. It can solve the problem of poor inspection quality of aircraft parts caused by excessive positioning deviation of positioner, and improve the assembly quality of aircraft.

Aiming at the problems of simple calculation model and large error in the traditional design of freight ropeway for transmission lines, an analysis and calculation method of multi-span and multi-load freight ropeway was proposed, considering the coupling action of bearing cable and traction cable. According to the characteristics of fixed and slippable multi-span ropeway and the elastic catenary method, the nonlinear equations representing the coupling action of working cables of multi-span freight ropeway were established from the aspects of structural conservation and force balance. The equation of structure conservation included 5 kinds of equations: the equation that the distance and the height difference of bearing cable and traction cable were equal, the conservation equation of the total distance and the total height difference of working cable in each span, the conservation equation of the length of traction cable between the freight cars, the conservation equation of the internal length of the bearing cable and the conservation equation of the total length of bearing cable. The force balance equation included 3 kinds of equations: the tension balance equation of working cable on both sides of freight car, the tension balance equation of traction cable on both sides of bracket, the tension balance equation of bearing cable on both sides of bracket of slippable ropeway. The linkage analysis on bearing cable and traction cable in different spans was realized, and the parameters such as the tension of working cable of multi-span freight ropeway under arbitrary loading could be calculated. Newton iteration method was used to solve the nonlinear equations representing the coupling action of working cables of multi-span freight ropeway, and the results were compared with the results of field operation test. The results showed that the proposed method could accurately calculate the important parameters such as the tension and slippage of bearing cable and traction cable under different loads, which can meet the engineering application requirements and provide a reference for the refined design and selection of freight cable.

Solid-surface reflector is widely used in satellite aperture antenna because of its high surface accuracy. Aiming at the problem that the overall reliability of the petal rotation solid-surface deployed antenna is affected by the large number of rotating pairs, the equivalent transformation principle and the corresponding design method of the solid-surface deployed antenna rotating along two orthogonal axes and a single axis were investigated, and the effectiveness of deployed antenna rotating along a single axis was verified by an example. The results showed that the number of rotating pairs of petal rotating deployed antenna was reduced to improve the overall stability and deployable reliability of the antenna, which is of great reference value for the design and analysis of solid-surface deployed antennas.

With the continuous development of economy, there are more and more high-rise buildings in cities, and the span of building keeps increasing. The traditional elevator can only realize vertical transportation, which is unable to run horizontally and efficiently in the large-span building, and passengers still need to walk to the destination after leaving the elevator. In order to improve the horizontal movement efficiency of people in the building, an innovative design scheme of annular transverse circulation elevator based on RGV (rail guided vehicle) is proposed. By using the tools of causal analysis, technological contradiction innovation principle and physical contradiction separation method in the TRIZ (Teorija Rezhenija Inzhenernyh Zadach), the innovative design for the cage structure, hoistway layout and driving mode of the elevator was carried out to realize the circular operation in the vertical direction and the annular operation in the horizontal direction for the elevator. In order to realize the efficient and safe operation of annular transverse circulation elevator based on RGV, a scheduling strategy for elevator cage was proposed based on the cross control strategy. The annular transverse circulation elevator based on RGV could get rid of the shackles of vertical shaft and traction system of the traditional elevator and complete the vertical and horizontal transportation tasks at the same time. This elevator can solve the problem of low horizontal movement efficiency of passengers in the annular building， which can effectively improve the overall movement efficiency of passengers in the annular building.

In view of the problems of high power consumption and extra high-voltage power supply in the piezoelectric jacquard needle (PJN) drive circuit for jacquard warp knitting machine, a novel PJN driver circuit with energy recovery function which integrates the self-boost circuit and working circuit was proposed. Based on the piezoelectric equation of piezoelectric chip and PJN structure, the working principle of PJN was introduced, the working mode of the proposed PJN drive circuit was analyzed in detail, and the pulse width modulation (PWM) control strategy of circuit mode conversion was given. The new PJN drive circuit adopted the energy storage inductor to replace the current-limiting resistor of the traditional drive circuit, which could not only limit PJN's positive charging current and reduce energy loss, but also used the energy absorbed from the low-voltage power supply to boost the low-voltage power supply of PJN to the high voltage required by the working state adaptively. In order to verify the self-boosting process of the circuit, the simulation analysis was carried out. The simulation results showed that the novel PJN drive circuit had a self-boosting function, and no external high-voltage working power supply was needed. Low-voltage power supply is only needed to drive PJN with high voltage, which can effectively reduce power consumption and realize energy-saving, and has a broad prospect of engineering application.

Palletizing robots are often used in welding, spraying, loading and unloading, assembling and palletizing processes, which can improve the labor productivity and ensure the product quality. Aimming at the existing heavy-duty palletizing robot, the D-H method was used to construct its kinematics equation and the MATLAB was used to solve its working space. By combining the ADAMS (automatic dynamic analysis of mechanical systems) and ANSYS Workbench, the transient dynamics simulation of the components and the whole machine of heavy-duty palletizing robot was carried out to obtain the stress and strain on the various components and the deformation of the robot end, which was compared with the experimental data to determine the reliability and accuracy of the simulation method. The response surface method and the topology method were combined to optimize the structure of heavy-duty palletizing robot, and a lightweight design method for its structure was obtained. The research indicates that this method is suitable for the lightweight design of various articulated robot, which can further reduce the cost of the materials, motors and reducers of robots.

In order to study the cognitive mechanism of space size and space distance in virtual environment, a perceptual matching method based on virtual representation behavior was proposed. From the perspective of the reproducibility of virtual reality (VR) space to real space, the perception matching model of VR space and real space was constructed. A series experiments on VR spatial cognition were designed and carried out, and the cognitive tendency and cognitive deviation of people towards space size and space distance in virtual environment were analyzed. Through the space size cognition experiment, it was found that the cognition of height perception and width perception was basically the same as that in the real space with the standard cognitive deviation degrees of ±1.9% and ±1.4% respectively. However, in the cognition of depth perception, there was an underestimation of distance and a decline in judgment，and the standard cognitive deviation degree was about ±3.4%. Through the egocentric distance cognition experiment, it was found that in VR space, the standard cognitive deviation degree of egocentric distance was ±(0%~2.5%). In addition, people's cognition of distance in the contralateral direction was significantly better than that in the positive direction, and in the front and lower side direction, the distance cognition was more stable, with fluctuation amplitude less than 0.5%, but the cognition in the upper direction was unstable. Through the cognition experiment of the dimensional-distance relationship, it was found that adding the dimension reference could optimize the cognitive deviation in positive direction by about 1%. Meanwhile, the standard cognitive deviation degree could be reduced to ±(0.5%~1.5%), which effectively improved people’s ability to judge the spatial distance in VR space. The research results can provide theoretical support for VR space production and virtual human-computer interaction design, and optimize the user's interactive experience to some extent.

The space thermal environment has a great influence on the stability of hoop deployable antenna in orbit. The ever-changing thermal environment will cause the drastic fluctuation in antenna temperature and thermal deformation of the antenna structure, which will worsen the surface accuracy of the antenna, affect the transmission of the antenna electrical signal and even cause the antenna failure. Therefore, it is necessary to perform the thermal-structure analysis on the antenna. Taking the hoop deployable antenna as the research object, considering various factors in the antenna in orbit service environment, such as the space vacuum, space low temperature, microgravity and space heat sources, the thermal radiation-thermal conduction analysis model of hoop deployable antenna with metal hinges was established by using the finite element software based on the Stefan-Boltzmann law and Fourier heat conduction theory, and the non-uniform temperature field of hoop deployable antenna was studied. Based on the elastic thermal mechanics theory and finite element theory, the thermal deformation analysis models of hoop deployable antenna with and without metal hinges were established to study the influence of non-uniform temperature field on the surface accuracy and tension ratio of hoop deployable antenna. The results showed that the surface accuracy and tension ratio of hoop deployable antenna with metal hinges were worse than those of hoop deployable antenna without metal hinges, and the change of surface accuracy had reached millimeter level. The study results have great significance for the same type of thermal-structural analysis of the hoop deployable antenna, and can provide reference for the structure design of antennas.

The kinematic analysis is the basis of performance analysis, modeling and optimization design of parallel mechanism. In the traditional methods, the topology model and velocity model of parallel mechanism are independently modeled, and the inherent relationship cannot be revealed, which results in incomplete and inaccurate kinematic modeling. In addition, when the existing kinematic performance indexes are used as the kinematic optimization objective, the physical significances of the kinematic evaluation indexes of horizontal rotation coupling mechanism are not clear. Therefore, the topology and kinematic modeling of the Exechon parallel robot with one translation and two rotations (1T2R) was studied by using the finite and instantaneous screw (FIS) method. Based on differential mappings of FIS method, the topology model and velocity model of the Exechon parallel robot were established in a unified mathematical framework, and the Jacobian matrices of velocity and force were obtained. On this basis, the virtual power transmissibility was proposed as kinematic performance index, which could analytically analyze the singularity of mechanism motion and effectively evaluate the motion / force transfer performance of Exechon parallel robot. Given a set of dimensional parameters for the Exechon parallel robot model, the local virtual power transmissibility distribution of the robot was analyzed by MATLAB. The research results provide reference for performance analysis and modeling of parallel robot, and lay a theoretical foundation for optimization design of Exechon parallel robot.

With the continuous improvement of the polishing and grinding process automation level, the parallel and hybrid robot mechanisms are widely used in the polishing and grinding process. In order to meet the needs of continuous contact operations such as polishing and grinding process, a class of 3-DOF(degree of freedom) rigid-flexible cooperative hybrid robot mechanism was used as the main feed mechanism of the polishing and grinding equipment. The kinematics models of three kinds of rigid-flexible cooperative hybrid robot mechanisms with different numbers and positions of ropes were established, and the position inverse solutions of the rigid part and the rope part were obtained by using the closed vector method. By using the method of derivation of position inverse solutions, the speed Jacobian matrixs of the 3UPS and the rope part were obtained. The D-H coordinate system of the UP branch chain was established, and the speed Jacobian matrix of the UP branch chain was obtained by using the differential transformation method. Then, the dimensionally unified speed Jacobian matrixs of three kinds of rigid-flexible cooperative hybrid robot mechanisms were obtained. Using the MATLAB software, the performance indexes of this class of rigid-flexible cooperative hybrid robot mechanism were solved. Through the comparative analysis of each performance index, the numbers and positions of ropes of rigid-flexible cooperative hybrid robot mechanism that could meet the requirements of different polishing and grinding working conditions were obtained. The research result provides a theoretical basis for the number selection and arrangement of ropes of rigid-flexible cooperative hybrid robot mechanism under different working conditions.

For a single component which has distinct precision difference in different part, the existing two algorithms of segmentation isopachous slicing algorithm and adaptive slicing algorithm have their respective advantages in weakening ladder effect and reducing slicing and molding time, compared with the traditional isopachous slicing algorithm in additive manufacturing, but they do not achieve the best in coordinating the molding precision and molding efficiency. Therefore, based on the STL（stereo lithography） model of this kind of parts, a segmentation adaptive slicing algorithm based on features of parts was proposed combined with principles of segmentation slicing and adaptive slicing. The model was segmented along the molding direction according to the accuracy requirements. Each segment was adaptively sliced using the method of adjusting the slicing thickness with the maximum tip height according to different accuracies. The slicing simulation tests of dipper tooth and track link were carried out. The results showed that on the premise of satisfying the requirements of part shape and precision, this algorithm had higher molding efficiency, better stability and flexibility compared with the segmentation isopachous slicing algorithm and adaptive slicing algorithm, and was easy to be implemented. In practical engineering application, it can shorten the molding time of parts and promote the development of additive manufacturing towards high efficiency.

In order to accurately analyse the coupling dynamics characteristics of the tensioner-high pressure riser, considering the effects of platform drift, tensioner and seawater damping, the transverse vibration dynamics simulation model of the tensioner-high pressure riser in deepwater drilling condition was established based on the basic principle of dynamics. Subsequently, the finite difference method in MATLAB was used for discrete solution. The effects of internal high pressure fluid, tensioner coupling, sea current velocity, platform drift and tension ratio of tensioner on the transverse vibration of high pressure riser and conventional riser were analyzed. The simulation results showed that the transverse vibration displacement of high pressure riser decreased and the stress increased under the effect of internal high pressure fluid and tensioner coupling. With the increase of sea current velocity, the transverse vibration displacement of risers increased, the transverse vibration stress of risers near the sea surface increased, and the transverse vibration stress at the bottom of risers was basically not affected by current velocity. With the increase of platform drift, the transverse vibration displacement of riser increased, and the change was more obvious as the riser got closer to the sea surface, but the transverse vibration stress basically remained unchanged. With the increase of tension ratio, the transverse vibration displacement of riser decreased and the stress increased, and stress concentration was easy to occur for conventional riser. The research results can provide theoretical basis for the analysis of coupling vibration characteristics of tensioner-high pressure riser in deepwater drilling condition.

In the operation cost of homestay, labor cost and energy cost account for a large share of total cost. In order to increase revenue while reducing costs and energy consumption, an unattended intelligent management system for homestay is designed. Based on the data mining technology, the crawler program was used to obtain a large amount of homestay operation data to provide reference for assisting homestay merchants to make decisions. Through the wireless RFID (radio frequency identification) technology, the RSSI (received signal strength indicator) values of corresponding tags were read by the reader to detect the change of human body position, which made the check-in management and check-out management more efficient. The STM32 control module was used to control the driving circuits of lamps, curtains and air conditioners to realize the functions of automatic light control and automatic temperature control, or the intelligent touch panel was used to control the intelligent home equipment manually. The experimental results showed that combining with the SVM (support vector machine) algorithm, the RFID detect system could accurately detect the change of human in the room, and the accuracy rate was up to 99.25%, which had high practical application value. The research shows that the intelligent management system can realize the unattended management for homestay and reduce labor costs and energy consumption, which lays the foundation for responding to the national strategy of intelligent electricity service for rural revitalization.

With the widely use of the sensor and the development of network techniques, Intelligent sensor system becomes a growing trend of sensor. According to the IEEE 1451.2 standard, an intelligent sensor system based on STM32F103 was designed, including an intelligent sensor module, a network adapter module, an upper computer and their corresponding running softwares. The intelligent sensor module used IIC to communicate with the network adapter module while the network adapter module used Wi-Fi to communicate with the upper computer and acted as the communication bridge between the intelligent sensor module and the upper computer. Experimental results showed that the intelligent sensor module could store the information of itself and the sensor, and realize the plug-and-play capability of the sensor. Besides, the network adapter module could make the intelligent sensor module achieve its plug-and-play capability. Moreover, the upper computer could realize instruction sending, result receiving and managing, as well as achieve real-time monitoring of the connection status between itself and the network adapter module. The intelligent sensor system realized wireless remote monitoring, getting rid of the shackles of cables, so it could adapt to more monitoring scenarios. It could read the information of the sensor itself, so as to identify the sensor and compatible with different types of sensors. It could also realize the self-calibration function of the sensor, so that the measurement results could be more accurate. The research results can provide reference for the development and application of large intelligent sensor system.