Optimized Design of Touching Parts of Soil Disinfection Machine Based on Strain Sensing and Discrete Element Simulation

Gao, Jianmin; Shen, Yue; Ma, Benben

doi:10.3390/s23146369

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…The soil fragmentation, swelling, and loosening of the cutter in this process are basically the same as that of the cutter in this paper. But because the blade of this cutter is short, its auxiliary cutting effect is relatively small [37]. And the vertical spiral ditching device has a structure similar to that of the cutter in this article, so its soil lifting and throwing movement process is similar to that of the cutter in this article.…”

Section: Working Mechanism Of Spiral Cuttersmentioning

confidence: 91%

Numerical Simulation of Spiral Cutter–Soil Interaction in Deep Vertical Rotary Tillage

Yang,

Xiao,

Pan

et al. 2023

Agriculture

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Deep vertical rotary tillage (DVRT) is a new tillage method which combines the advantages of deep tillage and rotary tillage. However, limited research has been conducted on a critical component of the deep vertical rotary tiller, namely the spiral cutter. In clay loam, there are a lot of large clods in the topsoil layer after tillage, and the cutting resistance and vibration of the cutter are substantial. To reveal the reasons behind this, a simulation model of a spiral cutter–soil system was developed using Smoothed Particle Hydrodynamics (SPH). Using this model, the working process and force of a spiral cutter were thoroughly investigated. The results show that soil fragmentation, swelling, and loosening primarily result from the combined effects of the separation cutting, velocity difference cutting, auxiliary cutting, and the spiral blade’s lifting effect on soil. The reasons for the larger clods are that topsoil furrow slices are larger and the velocity difference cutting is insufficient. The substantial resistance of the cutter is mainly due to the greater resistance of the blade and the bottom edge, and too many blades cutting the soil simultaneously. Furthermore, due to the asymmetry of the cutter’s structure, the resistance’s amplitude reaches 1963.5 N, which causes the cutter’s large vibration. These findings would be an important basis for optimal cutter design.

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Section: Working Mechanism Of Spiral Cuttersmentioning

confidence: 91%

Numerical Simulation of Spiral Cutter–Soil Interaction in Deep Vertical Rotary Tillage

Yang,

Xiao,

Pan

et al. 2023

Agriculture

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“…The particle parameters that are similar to those obtained from the soil accumulation angle test were selected in the GMEE material library of EDEM2020.2, and a virtual simulation model was established to simulate the falling process for soil in its natural state as an approximate representation of the particle interaction parameters. After several rounds of simulation tests, the interaction parameters for each material were finally determined, as shown in Table 2 [26]. According to the above tests, the soil shows a loam texture in the test area, and the soil moisture content in this area is high.…”

Section: Edem Simulation Model Preprocessingmentioning

confidence: 99%

The Optimized Design of Soil-Touching Parts of a Greenhouse Humanoid Weeding Shovel Based on Strain Sensing and DEM-ADAMS Coupling Simulation

Gao,

Jin,

2024

Sensors

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To overcome the shortcomings of plowing and rotary tillage, a human-like weeding shoveling machine was designed. The machine’s various moving rods were analyzed using Matlab R2019b(9.7.0.1190202) software to determine the appropriate entry and cutting conditions, as well as non-cutting conditions. It was concluded that a θ2 of 90° was optimal for cutting the soil and that the shoveling depth was suitable for greenhouse weeding. The Adams and DEM coupled discrete element simulation system was developed for this machine and was used to analyze the rotating shaft torque and shovel bending moment. A strain measurement system based on strain gauges was designed to measure the rotating shaft torque and shovel bar bending moment. A bending moment and torque measurement system was designed to perform field measurement tests for comparison with simulation results. The simulation system’s rotating shaft had an average torque error of 6.26%, while the shovel rod’s bending moment had an average error of 5.43%. The simulation accuracy was within the acceptable error range. Table U8 (81 × 44) of the Uniform Design of the Mixing Factor Level for the Homogeneous Virtual Simulation Test includes eight levels of forward machine speed ranging from 0.1 to 0.45 m/s and four levels of output shaft speed ranging from 90 to 165 r/min. Crank lengths were set at four levels ranging from 155 to 185 mm, while shovel lengths were set at four levels ranging from 185 to 230 mm. Four types of shovel shapes were proposed, including pointed curved shovels, pointed straight shovels, straight-edged curved shovels, and straight-edged straight shovels. A mathematical model was created via a regression analysis of the results of coupled simulation tests to establish the relationship between shaft torque and shovel rod bending moment, tool advance speed, shaft speed, crank length, tool length, and tool shape. The model was used to determine the optimum working parameters.

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“…Others have investigated the cutting and scattering processes of blades to uncover underlying patterns of particle motion [16][17][18][19][20]. Additionally, computer simulation techniques have been employed by some scholars to establish numerical models simulating blade operation processes [21][22][23][24][25][26][27]. However, it should be noted that mud spreader blades possess structural characteristics that differ from commonly used agricultural machinery blades; thus, their operational characteristics when interacting with mud exhibit distinctions from ordinary blades.…”

Section: Introductionmentioning

confidence: 99%

Simulation Analysis and Optimization Design of Paddy Field Mud Spreader Blades for Uniform Dispersion

Ren,

Chen,

Bao

et al. 2024

Agriculture

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To improve the distribution of mud particles collected in the tray during the operation of paddy field mud spreader blades, the optimal combination of parameters for the blades that results in the best uniformity of mud dispersion needs to be identified. In this study, a thorough force analysis was conducted on the spreading process, and computational equations were formulated to describe the motion of mud particles. By utilizing the discrete element simulation technique, a simulation model was developed to accurately represent the intricate interaction between the blades and mud particles. Through the single-factor simulation experiments, the ranges of key parameters such as the rotation radius, bending angle, sub-blade tilt angle, forward velocity, and rotational speed of the blade were determined. A secondary orthogonal rotational combination design was employed to establish a regression prediction model between the non-uniformity of mud dispersion and the key blade parameters. Subsequently, a multivariate single-objective optimization method was used to develop an optimization model for the non-uniformity of mud dispersion. The results indicate that the hierarchical order of factors influencing the non-uniformity of mud dispersion is as follows: rotation radius > rotation speed > bending angle > forward velocity > sub-blade tilt angle. To achieve a minimum spreading non-uniformity of 29.63%, a specific configuration is required, which includes a blade rotation radius of 188 mm, a bending angle of 121°, a sub-blade tilt angle of 30°, a forward velocity of 400 mm/s, and a rotation speed of 191 r/min. Finally, the accuracy of the optimization results was verified by means of bench tests. The research results provide a crucial reference for enhancing the uniformity of mud dispersion in paddy field mud spreader blades.

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Optimized Design of Touching Parts of Soil Disinfection Machine Based on Strain Sensing and Discrete Element Simulation

Cited by 5 publications

References 19 publications

Numerical Simulation of Spiral Cutter–Soil Interaction in Deep Vertical Rotary Tillage

Numerical Simulation of Spiral Cutter–Soil Interaction in Deep Vertical Rotary Tillage

The Optimized Design of Soil-Touching Parts of a Greenhouse Humanoid Weeding Shovel Based on Strain Sensing and DEM-ADAMS Coupling Simulation

Simulation Analysis and Optimization Design of Paddy Field Mud Spreader Blades for Uniform Dispersion

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