Subsoiling is an effective tillage technique for alleviating soil compaction,but the high traction resistance encountered at deeper working depths constrains its widespread application.To address this issue,a self-exc...Subsoiling is an effective tillage technique for alleviating soil compaction,but the high traction resistance encountered at deeper working depths constrains its widespread application.To address this issue,a self-excited and forced intelligent vibrating subsoiler was developed.The subsoiler is equipped with a compound vibration mechanism that can adaptively switch between self-excited vibration and forced vibration modes based on real-time monitoring of soil resistance.Field experiments were conducted to evaluate the performance of the self-excited and forced vibrating subsoiling(SEFV).These experiments compared its performance with conventional subsoiling(CS)and self-excited vibrating subsoiling(SEV)at different working depths(35-45 cm)and forward speeds(2 and 4 km/h).The results showed that at 2 km/h,SEFV operated in self-excited vibration mode and reduced traction resistance by 12.4%-13.1%compared to CS,with no significant difference from SEV.At 4 km/h,the resistance reduction effect of SEFV became more pronounced with increasing depth.At 45 cm depth,SEFV reduced traction resistance by 9.9%and 18.9%compared to SEV and CS,respectively,as it switched to forced vibration mode to overcome the high soil resistance.SEFV also maintained high subsoiling depth stability(>90%)at both speeds and all depths tested,demonstrating its advantage over SEV under high resistance conditions.The intelligent control system based on resistance feedback enabled the SEFV to automatically adapt to variable soil conditions and optimize its vibration behavior for improved subsoiling performance and energy efficiency.This study provides new insights into the design of adaptive vibrating subsoilers for enhanced tillage operations.展开更多
Soil compaction is a common problem facing conservation fields that restricts crop root growth and causes yield decrease.Subsoil techniques have been developed to break up the compaction layer.However,subsoil implemen...Soil compaction is a common problem facing conservation fields that restricts crop root growth and causes yield decrease.Subsoil techniques have been developed to break up the compaction layer.However,subsoil implement requires large draft power that hampered the development of subsoil techniques for most of developing countries due to lack of large scale tractors.Aiming to optimize the penetration resistance of the subsoiler and create a good working environment for the operators,a staggered vibrating subsoiler was developed.A new staggered vibrating mechanism was designed to generate the staggered vibration of the shanks meanwhile the V-shape shanks arrangement was adopted to keep relative balance for the subsoiler.In order to obtain optimum working parameters of the vibration frequency and forward speed,the trajectory of shanks was simulated by using the MATLAB software.The forward speed of 2-3 km/h with vibration frequency of 12 Hz was recommended to acquire an effective decrease in draft force.Field performance of this subsoiler was evaluated in terms of the draft force,power requirement and tractor wheel slippage.By comparing the two operation modes,staggered vibrating(SV)and rigid(NV)of shanks,the decrease ratios of draft force for SV were determined by 16.97%,12.12%and 9.02%at forward speeds of 2.2 km/h,2.6 km/h and 3.1 km/h,respectively.This is better than the research for the 1SZ-460 vibratory subsoiler that was decreased by 9.09%in draft force.The power requirement for SV was not significantly greater than that for NV.The obviously decreased wheel slippage was observed for SV by decrease of 12.47%,17.96%and 21.79%at forward speeds of 2.2 km/h,2.6 km/h and 3.1 km/h,respectively.In conclusion,the staggered vibrating subsoiler presents preferable working performance and is recommended to be applied in subsoil tillage process for developing countries.展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2024YFD2000100)the National Natural Science Foundation of China(Grant No.52105300 and 52075215)the Science and Technology Research Project of Jilin Provincial Education Department(Grant No.JJKH20250136KJ).
文摘Subsoiling is an effective tillage technique for alleviating soil compaction,but the high traction resistance encountered at deeper working depths constrains its widespread application.To address this issue,a self-excited and forced intelligent vibrating subsoiler was developed.The subsoiler is equipped with a compound vibration mechanism that can adaptively switch between self-excited vibration and forced vibration modes based on real-time monitoring of soil resistance.Field experiments were conducted to evaluate the performance of the self-excited and forced vibrating subsoiling(SEFV).These experiments compared its performance with conventional subsoiling(CS)and self-excited vibrating subsoiling(SEV)at different working depths(35-45 cm)and forward speeds(2 and 4 km/h).The results showed that at 2 km/h,SEFV operated in self-excited vibration mode and reduced traction resistance by 12.4%-13.1%compared to CS,with no significant difference from SEV.At 4 km/h,the resistance reduction effect of SEFV became more pronounced with increasing depth.At 45 cm depth,SEFV reduced traction resistance by 9.9%and 18.9%compared to SEV and CS,respectively,as it switched to forced vibration mode to overcome the high soil resistance.SEFV also maintained high subsoiling depth stability(>90%)at both speeds and all depths tested,demonstrating its advantage over SEV under high resistance conditions.The intelligent control system based on resistance feedback enabled the SEFV to automatically adapt to variable soil conditions and optimize its vibration behavior for improved subsoiling performance and energy efficiency.This study provides new insights into the design of adaptive vibrating subsoilers for enhanced tillage operations.
基金This work was supported by China’s Ministry of Agriculture,Agricultural Public Welfare Industry Research(201503117)China’s Ministry of Agriculture,Agricultural Public Welfare Industry Research(201503116-16)the Soil-Machine-Plant Key Laboratory of the Ministry of Agriculture of China.
文摘Soil compaction is a common problem facing conservation fields that restricts crop root growth and causes yield decrease.Subsoil techniques have been developed to break up the compaction layer.However,subsoil implement requires large draft power that hampered the development of subsoil techniques for most of developing countries due to lack of large scale tractors.Aiming to optimize the penetration resistance of the subsoiler and create a good working environment for the operators,a staggered vibrating subsoiler was developed.A new staggered vibrating mechanism was designed to generate the staggered vibration of the shanks meanwhile the V-shape shanks arrangement was adopted to keep relative balance for the subsoiler.In order to obtain optimum working parameters of the vibration frequency and forward speed,the trajectory of shanks was simulated by using the MATLAB software.The forward speed of 2-3 km/h with vibration frequency of 12 Hz was recommended to acquire an effective decrease in draft force.Field performance of this subsoiler was evaluated in terms of the draft force,power requirement and tractor wheel slippage.By comparing the two operation modes,staggered vibrating(SV)and rigid(NV)of shanks,the decrease ratios of draft force for SV were determined by 16.97%,12.12%and 9.02%at forward speeds of 2.2 km/h,2.6 km/h and 3.1 km/h,respectively.This is better than the research for the 1SZ-460 vibratory subsoiler that was decreased by 9.09%in draft force.The power requirement for SV was not significantly greater than that for NV.The obviously decreased wheel slippage was observed for SV by decrease of 12.47%,17.96%and 21.79%at forward speeds of 2.2 km/h,2.6 km/h and 3.1 km/h,respectively.In conclusion,the staggered vibrating subsoiler presents preferable working performance and is recommended to be applied in subsoil tillage process for developing countries.
