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Performance of no-till corn precision planter equipped with row cleaners

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International Journal of Agricultural and Biological Engineering 2015年第5期8卷 15-25页

作者： Yang Li zhang Rui Gao Nana Cui Tao Liu Quanwei zhang dongxing College of Engineering China Agricultural UniversityBeijing 100083China

In the continuous annual wheat-corn cropping area of North China Plain,no-till planting that promotes soil conservation and crop yield while reducing operation cost has been gradually accepted by local ***,previous wheat residue is the main limiting factor affecting the performance of existing planters in placing seeds at uniform spacing and optimum depth in residue covered *** order to solve this problem,a kind of ground-wheel-driven row cleaner was designed,developed and mounted on row units of a four-row pneumatic precision *** planter has two adjacent row units equipped with the newly designed row cleaners and the other two adjacent row units equipped with the commonly used inactive row *** was used for planting at three forward speeds(4 km/h,6 km/h and 8 km/h)into half residue(HR)and whole residue(WR)*** amount of residue removal,seeding depth,emergence rate and indices of uniformity in seed spacing(missing-seeding index,quality of feeding index and precision index)were *** newly designed row cleaner performed better with regard to residue removal,with the average percentage of residue cleared as 63.0%compared to 40.3%for the inactive row *** the HR and WR plots,percentage of residue cleared of the newly designed row cleaner reached 57.1%and 68.9%respectively,suggesting that the newly designed row cleaner can work more effectively at high residue *** contrast,with the percentage of residue cleared of the inactive row cleaner as 43.1%and 37.5%in HR and WR plots,suggesting that the inactive row cleaner just can work effectively under low residue *** of missing-seeding index,QFI,precision index,coefficient of variation of depth and percent emergence for the newly designed row cleaner under whole residue level are comparable to those for the inactive row cleaner under half residue *** result indicates that the effect of using the newly designed row cleaner is equal to that of reducin

关键词： row cleaner corn production no-till planter wheat residue management annual double cropping system

Malfunction Diagnosis of the GTCC System under All Operating Conditions Based on Exergy Analysis

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Energy Engineering 2024年第12期121卷 3875-3898页

作者： Xinwei Wang Ming Li Hankun Bing dongxing zhang Yuanshu zhang Steam Turbine and Gas Turbine Research Center Huadian Electric Power Research Institute Co.Ltd.Hangzhou310030China College of Control Science and Engineering Zhejiang UniversityHangzhou310058China

After long-term operation,the performance of components in the GTCC system deteriorates and requires timely *** to the inability to directly measure the degree of component malfunction,it is necessary to use advanced exergy analysis diagnosis methods to characterize the components’health condition(degree of malfunction)through operation data of the GTCC *** dissipative temperature is used to describe the degree of malfunction of different components in the GTCC system,and an advanced exergy analysis diagnostic method is used to establish a database of overall operating condition component malfunctions in theGTCC *** software is used to simulate the critical parameters of the malfunctions of the GTCC system components and to obtain the changes in the dissipative temperature of different ***,the fuel consumption and economic changes of the GTCC system on a characteristic power supply day under health and malfunction conditions are ***,the effects of maintenance costs,electricity,and gas prices on maintenance expenses and profits are *** results show that the GTCC system maintenance profit is 6.07$/MWh,while the GTCC system maintenance expense is 5.83$/*** with the planned maintenancemode,the malfunction maintenance mode saves 0.24$/***,the maintenance coefficient of GTCC should be adjusted under different malfunctions to obtain a more accurate maintenance period.

关键词： Gas turbine combined cycle malfunction diagnosis exergy analysis maintenance profits

Development of mechatronic driving system for seed meters equipped on conventional precision corn planter

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International Journal of Agricultural and Biological Engineering 2015年第4期8卷 1-9页

作者： Yang Li He Xiantao Cui Tao zhang dongxing Shi Song zhang Rui Wang Mantao College of Engineering China Agricultural UniversityBeijing 100083China

Precision planters are more and more widely used for planting corn in *** meters of conventional precision corn planters are usually driven by ground wheel and chain and sprocket system at *** of the slippage of ground wheels and vibration of chains,planting accuracy cannot be ensured,especially at higher forward *** improve the planting performance of precision planters,a mechatronic driving system was designed and its field working performance was evaluated in this research.A two-row pneumatic precision planter was modified to allow simultaneously using two different driving systems,i.e,with one row unit equipped with the newly designed mechatronic driving system and the other row unit equipped with conventional mechanical driving system,and used for planting at three forward speeds(9,11 and 12 km/h)on no-tillage and rotary-tillage *** distances between adjacent seeds in each plot were measured and the indices of uniformity in seed spacing,quality of feeding index(QFI),missing-seeding index and precision index were *** the average 4.70%increase of QFI and 3.54%decrease of missing-seeding index,the mechatronic driving system performed better than the mechanical driving system both on no-tillage and rotary-tillage lands at each forward *** values of QFI,missing-seeding index and precision index of the mechatronic driving system on rotary-tillage land are comparable to those on no-tillage land,by contrast,these indices of the mechanical driving system on rotary-tillage land are significantly worse than those on no-tillage *** result indicates that the mechatronic driving system can eliminate the effect of ground wheel slippage on planting quality and maintain the uniformity of seed *** the QFI,missing-seeding index and precision index become worse with the increase of forward speed,with the worst values of QFI of 89.93%,missing-seeding index of 5.08%and precision index of 18.92%at the highest forwar

关键词： precision planter seed meter mechatronic driving system control motor wheel slippage

Remnant fertilizer monitoring system for maize fertilizer applicators

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International Journal of Agricultural and Biological Engineering 2023年第5期16卷 173-180页

作者： Yaohui zhang Kailiang zhang Yang Yu dongxing zhang Li Yang Tao Cui Xiantao He College of Engineering China Agricultural UniversityBeijing 100083China The Soil-Machine-Plant key laboratory of the Ministry of Agriculture of China Beijing 100083China

A remnant fertilizer monitoring system utilizing three-dimensional(3D)reconstruction was proposed to detect the amount of remaining fertilizer in the applicator’s *** tests were carried out to compare the performance of four algorithms to estimate the remnant fertilizer amount:fertilizer remnant monitoring biharmonic spline algorithm(V4),natural nearest-neighbor algorithm(Natural),linear algorithm(Linear),cubic algorithm(Cubic).The average relative error for remnant fertilizer monitoring is 7.33%for the Linear algorithm,7.30%for the Natural algorithm,5.18%for the Cubic algorithm,and 4.30%for the V4 *** tests are conducted at three fertilization rates to compare the performances of the V4 and Cubic *** average relative error for discharged fertilizer monitoring is 8.64%for the Cubic algorithm,which is 1.91%lower than that of the V4 *** results show that the Cubic algorithm has the best performance for remnant fertilizer *** average relative error of remnant fertilizer monitoring is 2.42%for the Cubic algorithm,which is 0.43%lower than that of the V4 *** response time of the remnant fertilizer monitoring system is 0.26 *** results demonstrate that the proposed remnant fertilizer monitoring system is highly accurate and suitable for real-time applications.

关键词： maize fertilizer applicator remnant fertilizer monitoring 3D reconstruction solid level detection

Development and performance evaluation of the electric-hydraulic concave clearance control system based on maize feed rate mon

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International Journal of Agricultural and Biological Engineering 2022年第2期15卷 156-164页

作者： Chenlong Fan dongxing zhang Li Yang Tao Cui Xiantao He Huihui Zhao College of Engineering China Agricultural UniversityBeijing 100083China Key Laboratory of Soil-Machine-Plant Systematic Technology Ministry of Agriculture and Rural AffairsBeijing 100083China

Complex field environments,diverse crop conditions,and varying feed rate fluctuations commonly result in a decline in the threshing performance and the clogging of the threshing cylinder for maize *** order to overcome these problems,an electric-hydraulic concave clearance automatic control system for the threshing unit was developed based on the maize feed rate monitoring,which can automatically realize the best match between the concave clearance and diverse feed rates during *** threshing performance of the electric-hydraulic control system was evaluated for varying and uneven maize feed rate fluctuations,such as the feed rate increased(6-8-10 kg/s),the feed rate decreased after an increase(6-10-8 kg/s,8-10-6 kg/s),the feed rate increased after a decrease(8-6-10 kg/s,10-6-8 kg/s),and the feed rate decreased(10-8-6 kg/s).In particular,the threshing rotor shaft peak torque,the range of threshing rotor shaft torque,the rate of broken grains(BGR),and the rate of unthreshed grains(UGR)with and without the electric-hydraulic control system were *** with the electric-hydraulic control system were adjustable concave clearance with the value of 45 mm,50 mm,and 55 *** without the electric-hydraulic control system were constant concave clearance(50 mm).Results demonstrate that the threshing unit with the electric-hydraulic control system outperformed the one without the electric-hydraulic control system,with threshing rotor peak torque,the range of threshing rotor axis torque,the BGR,and the UGR decreasing by 18.38%,38.27%,2.08%,and 0.10%,***,the rate of broken grains was lower than 5.00%,better than the national ***,the feed rate fluctuations and timely adjustment of the concave clearance were able to avoid blocking the rotor and improve the threshing performance compared to the constant concave clearance.

关键词： maize harvester threshing cylinder feed rate concave clearance electro-hydraulic control system

Optimized design and field experiment of a staggered vibrating subsoiler for conservation tillage

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International Journal of Agricultural and Biological Engineering 2019年第1期12卷 59-65页

作者： Yunxia Wang Abdalla N Osman dongxing zhang Li Yang Tao Cui Xiangjun Zhong College of Engineering China Agricultural UniversityBeijing 100083China Department of Agricultural Machinery College of Agricultural StudiesSudan University of Science and TechnologyKhartoumSudan

Soil compaction is a common problem facing conservation fields that restricts crop root growth and causes yield *** techniques have been developed to break up the compaction ***,subsoil implement requires large draft power that hampered the development of subsoil techniques for most of developing countries due to lack of large scale *** 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 *** order to obtain optimum working parameters of the vibration frequency and forward speed,the trajectory of shanks was simulated by using the MATLAB *** forward speed of 2-3 km/h with vibration frequency of 12 Hz was recommended to acquire an effective decrease in draft *** performance of this subsoiler was evaluated in terms of the draft force,power requirement and tractor wheel *** 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,*** is better than the research for the 1SZ-460 vibratory subsoiler that was decreased by 9.09%in draft *** power requirement for SV was not significantly greater than that for *** 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,*** conclusion,the staggered vibrating subsoiler presents preferable working performance and is recommended to be applied in subsoil tillage process for developing countries.

关键词： vibrating subsoiler staggered vibrating mechanism V-shape arrangement field experiment

Design and experimental study of seed precise delivery mechanism for high-speed maize planter

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International Journal of Agricultural and Biological Engineering 2018年第4期11卷 81-87页

作者： Quanwei Liu Tao Cui dongxing zhang Li Yang Yunxia Wang Xiantao He Mantao Wang College of Engineering China Agricultural UniversityBeijing 100083China School of Mechatronics Engineering Zhengzhou University of AeronauticsZhengzhou 450046China

Aiming at improving the seed spacing uniformity of maize planter at high forward speed,a seed precise delivery mechanism driven by electric motor has been developed and evaluated in *** mechanism was designed to deliver single seed from seed meter to ***’s movement from the seed release point in a seed meter to the seed delivery cavity in the belt was analyzed,the mathematical model of seed movement in the seed precise delivery mechanism was established based on seed delivery time analysis.A mechanical prototype was designed and associated control system was *** performance contrast experiment was conducted between a traditional seed tube and newly developed seed precise delivery mechanism,and test results indicated that the qualities of feed index of the seed precise delivery mechanism were higher than those of the traditional seed tube delivery mechanism,and the coefficients of variation of the seed precise delivery mechanism were lower than those of the traditional seed tube delivery mechanism when the forward speed of planter was set at 10 km/h,12 km/h and 14 km/h,*** indicated the seed precise delivery mechanism significantly improved seed spacing uniformity of maize planter compared with the traditional seed tube delivery mechanism.

关键词： seed precise delivery mechanism electric motor seed spacing uniformity delivery time mechanical prototype

Effect of travel speed on seed spacing uniformity of corn seed meter

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International Journal of Agricultural and Biological Engineering 2017年第4期10卷 98-106页

作者： Liu Quanwei He Xiantao Yang Li zhang dongxing Cui Tao Qu Zhe Yan Bingxin Wang Mantao zhang Tianliang College of Engineering China Agricultural UniversityBeijing 100083China Soil-Machine-Plant Key Laboratory of the Ministry of Agriculture Beijing 100083China

Both seeding performance of seed metering unit and travel speed of seed planter have significant effects on seeding quality,thereby affecting crop growth and *** order to determine the effects of different travel speeds on seed spacing uniformity,four different types of seed meters were evaluated at five different travel speeds on seed meter test bench and in *** tested seed meters included a finger pickup seed meter,a scoop-wheel seed meter,an air-pressure type seed meter and an air-blowing type seed *** seeding performance of the horizontal distribution of seeds within a row was described by using the coefficient of variation,the quality of feed index,the multiple index and the miss-seeding *** were performed in laboratory and field,*** indicated that different travel speeds have statistically significant effects on seed spacing *** four types of seed meters performed better on the seed meter test bench than in the *** of variation increases and quality of feed index decreases as the travel speed of seed planter *** best seed spacing uniformity was obtained with the air-pressure type seed meter,followed with the air-blowing type seed meter,the finger pickup seed meter and the scoop-wheel seed *** were considerable differences between the performances of the scoop-wheel seed meter in the bench test and field test;the seeding qualities were much better in the bench test than in the field *** scoop-wheel seed meter is more sensitive to vibration than the other types of seed meters.

关键词： corn seed meter travel speed seed spacing uniformity precision corn planter field test test bench

Design of depth-control planting unit with single-side gauge wheel for no-till maize precision planter

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International Journal of Agricultural and Biological Engineering 2016年第6期9卷 56-64页

作者： zhang Rui Cui Tao Han Dandan zhang dongxing Li Kehong Yin Xiaowei Wang Yunxia He Xiantao Yang Li College of Engineering China Agricultural UniversityBeijing 100083China

No-till planters are very popular for maize seeding in fields covered with residue in annual wheat-maize double cropping system in North China ***,there is no suitable depth control mechanism for existing no-till maize planters,and as a result,it is hard to obtain consistent planting depth,uniform emergence,and good passing ability at the same *** the above reasons,a proper planting unit with a new type of depth-control mechanism was developed in this *** mechanism consists of a single-side gauge wheel,a parallel four-bar linkage,a pair of double-disc opener,a V-shape press wheel and a depth regulator,which can adjust the planting depth from 30 mm to 90 mm to satisfy the agronomic requirement under different field *** on analysis and calculation,the width of gauge wheel was set to 50 mm while the length of parallel four-bar linkage was set to 350 *** experiment was conducted and the results indicated that the newly designed planting unit with single-side gauge wheel performed well with regard to planting depth uniformity and anti-blocking *** planting depth uniformity and seed spacing quality were 95.45%and 91.90%,respectively,when the average height of stubble was 22.5 cm and residue amount was 0.64 kg/m^(2)in the *** can satisfy the requirement of no-till maize planting on the cropland with residue and stubble in North China Plain.

关键词： no-till planter maize precision planter planting unit depth control single-side gauge wheel residue stubble