Structural Design and Analysis of Lower Limb Exoskeleton Robotics

With the acceleration of the global aging process and the increase of cardiovascular an cerebrovascular diseases, more and more patients are paralyzed due to accidents, so the exoskeleton robot began to appear in people's sight, and the lower limb exoskeleton robot withrehabilitation training is also favored by more and more people. In this paper, the structural designand analysis of the lower limb exoskeleton robot are carried out in view of the patients' expectation ofnormal walking. First, gait analysis and structural design of lower limb exoskeleton robot. Based onthe analysis of the walking gait of normal people, the freedom of the three key joints of the lower limbexoskeleton robot hip joint, knee joint and ankle joint is determined. at the same time, according tothe structural characteristics of each joint, the three key joints are modeled respectively, and theoverall model assembly of the lower limb exoskeleton robot is completed. Secondly, the kinematicsanalysis of the lower limb exoskeleton robot was carried out to obtain the relationship between thelinear displacement, linear speed and acceleration of each joint, so as to ensure the coordination ofthe model with the human lower limb movement. Thirdly, the static analysis of typical gait of hipjoint, knee joint and ankle joint is carried out to verify the safety of the design model under thepremise of ensuring the structural strength requirements. Finally, the parts of the model were 3Dprinted, and the rationality of the design was further verified in the process of assembling the model

Design of Plastic Injection Mold with Support Strip Based on CAD/CAE

The structural characteristics of plastic parts containing support strips were analyzed, and Moldflow software was used to simulate and analyze the pouring position and cooling system of the plastic parts to determine the optimal solution. The UG-Moldwizard module was used to complete the mold base design of the injection mold, which reduced the potential risks in the design of the injection mold, improved the quality of the mold, and reduced the number of mold trials. It fully demonstrated the role of CAE technology in the design of the pouring system and the development process of the injection mold. The outstanding role it plays in the process can provide reference value for the design of injection molds similar to plastic parts

Design of Campus Self-service Express Packaging Recycling Machine

Based on the concept of sustainable design, we are committed to seeking innovative solutions and designing a complete express packaging recycling machine. The device consists of a vibration device, a compression device, a winding device and an electronic control system to promote the recycling of resources and environmental protection. This device can further improve the recycling efficiency and feasibility. It provides new ideas and solutions for the express industry and promotes the development of sustainable design in the field of express packaging recycling and reuse devices

Research on the Motion Characteristics of Suction Valve Plate Based on Fluid Structure Coupling

The air valve is the core component of the cyclic operation of the compressor cylinder, and its structure and performance largely determine whether the reciprocating compressor can operate more efficiently and economically. On the basis of analyzing the basic structure and working principle of the air valve, this article mainly studies the motion characteristics of the suction valve plate. Based on fluid structure coupling mechanics and using ADINA software as a platform, numerical simulation analysis was conducted on the suction valve of a certain compressor model. Studying the stress of the valve plate and the variation of its upper and lower surface pressure with the opening and closing of the valve plate during the suction process of the compressor provides theoretical guidance for the rationality of the design of the air valve and related components, thereby improving the service life of the air valve and the working efficiency of the compressor

Experimental Study on Classification Method of Leakage Signal in Industrial Boiler Pipeline

In this paper, a new acoustic emission detection technology for boiler pipeline leakage using random forest and KNN classifier is proposed. The signal parameter index is processed as feature vector, which overcomes the shortcoming of the traditional method which requires a large number of sample data for training and classification. First, the characteristic parameters of boiler pipeline leakage acoustic emission signal are extracted, and then the extracted characteristic parameters are input into random forest and KNN classifier as feature vectors for classification processing. Eight indexes including amplitude, ringing count, duration, energy, rise count, rise time, RMS voltage and average signal level are selected and input into the classifier as feature vectors. As a diagnostic for pipeline leak classification. The experimental results show that this method is effective and feasible in pipeline leak diagnosis, and the feasibility of applying random forest and KNN algorithm to the classification of acoustic emission signals in pipeline leak detection is verified

Experimental Study of the Characteristics of Solar Cells Affected by the Angle of Incidence of Illumination

As the global energy crisis continues to intensify, the search for alternative energy sources has become increasingly urgent. As an emerging clean energy source, photovoltaic power generation not only effectively reduces carbon dioxide emissions, but also has many advantages such as renewability and distribution. Therefore, photovoltaic solar energy has attracted great attention. This article mainly studies the influence of different incident angles of light on the characteristic parameters of solar panels made of different materials under certain light intensity. Using the control variable method, under a fixed incident angle of light, the intensity of the light source irradiance is adjusted by changing the magnitude of the light source current to obtain the open circuit voltage, short-circuit current, maximum output power, and fill factor under different conditions. Use Origin software to draw characteristic curves and fit the variation pattern of photovoltaic characteristic curves. The basic characteristics of solar photovoltaic cells can be characterized by the relationship curve between their current and voltage. Finally, it is concluded that the basic characteristic parameters of solar cells increase with the increase of light intensity; When the incident angle of light is 75°, the conversion efficiency reaches its maximum

Lightweight Design of Front Axle Structure of a Certain Type of Automobile

In this paper, the front axle of a certain model is taken as the research object, and the stress and deformation of the front axle under three typical working conditions are analyzed by finite element technology.Based on the simulation results, the 3D model of the front axle was optimized, and the finite element analysis of the optimized structure of the front axle under three typical working conditions was carried out to verify the correctness of the model.Finally, the fatigue tool module of ANSYS Workbench was used to analyze the fatigue life of the front axle under the optimized emergency conditions, and the feasibility of the model was verified.The analysis data shows that the design of the front axle components still has a lot of potential for lightweighting, and the weight of the front axle can be reduced by 6.73% through optimization, and the performance of the front axle can also meet the needs of use.The research conclusion has a certain reference value for the lightweight design of automobile front axle

Experimental Study of Thermal Conductivity of Multilayer Cylindrical Walls

Thermal conductivity is an important physical parameter in thermal equipment, in the blast furnace, rotary kiln and other equipment, multi-layer cylindrical wall is extremely important in industrial production of a thermal conductivity model, its thermal conductivity coefficient determines the ability of the cylindrical wall, which results in the existence of a large number of multi-layer cylinder thermal conductivity problems of the pitfalls. This paper focuses on the establishment of a mathematical model of the multi-layer cylinder thermal conductivity problem, by applying different voltages to the multi-layer cylinder wall, study the temperature distribution of the multi-layer cylinder wall under the conditions of natural convection and forced convection, and draw the line graphs under the conditions of natural convection and forced convection by Origin software, and finally conclude that: under the same conditions, the forced convection is significantly stronger than the natural convection; under the conditions of different voltages, the multi-layer cylinder wall under the conditions of steady state convection, the forced convection is much stronger than natural convection. Under different voltage conditions, the temperature of the multilayer cylinder wall under steady state conditions increases with the increase of voltage, which provides a strong support for the related research

Lightweight Design of a Certain Type of Dump Truck Frame

With the rapid growth of China's economic strength, the demand and market share are also constantly increasing. The number of cars is rapidly increasing, and a large amount of fuel is consumed as a result. The massive release of vehicle exhaust seriously damages the natural environment, and the environmental crisis is becoming increasingly serious. This article follows the principles of improving fuel efficiency, reducing emissions, and enhancing vehicle performance. Using NX 12.0 software, a three-dimensional model of a certain type of dump truck frame is constructed based on actual parameters. ANSYS Workbench is used to simplify the geometric model, mesh division, and material definition, and a finite element model is constructed. Obtain the structural performance and natural vibration characteristics of the original chassis under four typical working conditions: bending, torsion, lifting, and unloading, through static analysis and modal analysis. On this basis, the dimensions of the components that bear less load on the original frame were optimized, and the topology of the second crossbeam and rear end corner of the subframe that bear less load on the original frame was optimized to obtain a new frame. The new frame of the dump truck underwent secondary static analysis and modal analysis, and it was found that the weight of the new frame decreased by 41.03 kg, successfully reducing the weight of the frame by 4.38%, improving the vehicle's handling and stability, and extending its service life

Research on the Influence of Different Light Intensities on the Characteristics of Solar Cells

In China, there is a wide range of renewable energy resources, with solar energy resources being the most extensive. Solar cells are devices that directly convert solar energy into electrical energy through the photovoltaic effect. This energy conversion process does not produce any harmful substances that could negatively impact the environment, making solar energy a highly environmentally friendly form of new energy generation. Various external conditions, such as light intensity, light angle, spectral range, temperature, and different materials, can affect the characteristic parameters of solar cells. These parameters include open circuit voltage, short circuit current, maximum output power of solar panels, fill factor, and conversion efficiency. To enhance the longevity and efficiency of solar cells, it is crucial to determine the optimal light intensity for solar cell power generation. This study aims to investigate the patterns of variation in the characteristic parameters of solar cells and their I/V characteristic curves by manipulating light intensity and environmental temperature. The experimental results demonstrate that temperature has an inverse relationship with open circuit voltage, while its impact on fill factor is not significant. Furthermore, the influence of temperature on short circuit current is greatest at 25°C and smallest at 15°C