Implementation of a magnetorheological damper on a no-till seeding assembly for optimising seeding depth

Sharipov, Galibjon M.; Paraforos, Dimitrios S.; Griepentrog, Hans W.

doi:10.1016/j.compag.2018.05.024

Cited by 19 publications

(14 citation statements)

References 14 publications

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“…The device regulated the output current, which was linearly proportional to the input voltage of the MR damper. More detailed information about the performance of the MR damper can be found in previous work by the authors of reference [27].…”

Section: Instrumentation and Implementation Of The Mr Dampermentioning

confidence: 99%

“…To define the field profiles, the geo-referenced coordinates of the active prism were transformed to the ground touching point of the wheel. The detailed formulas on calculating all the forces and transformations, in terms of rotations and translations for the profile determination, are given in reference [27].…”

Section: Evaluation Of the Model Performancementioning

confidence: 99%

“…Two different traveling speeds of 10 km h −1 and 12 km h −1 were set for all performed experiments. The field tests with the current values 0.3 A, 0.5 A, and 0.7 A had the best performance, in terms of coulter dynamics [27], thus they were chosen to be further analyzed in the present work.…”

Section: Evaluation Of the Model Performancementioning

confidence: 99%

“…This was followed by the application of the MR damper on the coulter assembly, where the dynamics of the assembly were also captured by leveraging the information from the attached sensors [25]. Subsequently, the performance of the coulter with its corresponding dynamics was evaluated [26,27]. The evaluation showed the necessity for further validation of the simulation model by utilizing the measured inputs from the real-life vertical forces and surface profiles.…”

Section: Introductionmentioning

confidence: 99%

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Validating the Model of a No-Till Coulter Assembly Equipped with a Magnetorheological Damping System

2019

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Variability in soil conditions has a significant influence on the performance of a no-till seeder in terms of an inconsistency in the depth of seeding. This occurs due to the inappropriate dynamic responses of the coulter to the variable soil conditions. In this work, the dynamics of a coulter assembly, designed with a magnetorheological (MR) damping system, were simulated, in terms of vertical movement and ground impact. The developed model used measured inputs from previously performed experiments, i.e., surface profiles and vertical forces. Subsequently, the actual coulter was reassembled with an MR damping system. Multiple sensors were attached to the developed coulter in order to capture its motion behavior together with the profiles, which were followed by the packer wheel. With the aim to validate the correctness of the simulation model, the simulation outputs, i.e., pitch angles and damper forces, were compared to the measured ones. The comparison was based on the root-mean-squared error (RMSE) in percentage, the root-mean-squared deviation (RMSD), and the correlation coefficient. The average value of the RMSE for the pitch angle, for all currents applied on the MR damper, was below 10% and 8% for the speeds of 10 km h−1 and 12 km h−1, respectively. For the damper force, these figures were 15% and 13%. The RMSD was below 0.5 deg and 1.3 N for the pitch angle and the damper force, respectively. The correlation coefficient for all datasets was above 0.95 and 0.7 for the pitch angle and the damper force, respectively. Since the damper force indicated a comparatively lower correlation in the time domain, its frequency domain and coherence were investigated. The coherence value was above 0.9 for all datasets.

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Section: Instrumentation and Implementation Of The Mr Dampermentioning

confidence: 99%

Section: Evaluation Of the Model Performancementioning

confidence: 99%

Section: Evaluation Of the Model Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Validating the Model of a No-Till Coulter Assembly Equipped with a Magnetorheological Damping System

2019

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“…Variation in seeding depth caused by dynamic excitation can affect the precision of a seeding mechanism significantly. A study of the dynamic performance of a precision agricultural seeding machine operating over stubble showed that variation in seeding depth was distributed with Weibull distribution and a standard deviation of 8.7 mm when sown to a target depth 40 mm (Sharipov et al 2017b;Sharipov et al 2018). In mining environments such as those seen in the Pilbara region of Western Australia, when operating over rough, rocky soils, the amplitude of excitation could exceed that of stubbled soils increasing the variation in sowing depth.…”

Section: Introductionmentioning

confidence: 99%

Improvements to mechanical direct seeder design guided by the optimal sowing depth of soft spinifex (Triodia pungens)

Masarei¹,

Guzzomi²,

Merritt³

et al. 2019

Proceedings of the International Conference on Mine Closure

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The ability to reliably and efficiently restore degraded ecosystems at scale is a major challenge. Restoration on a mine site typically consists of either the planting of cultivated nursery stock or the direct seeding of seed onto site to reinstate native plants and ecosystems. At scale, planting seedlings can be extremely costly and time consuming and therefore, restoration practitioners have moved towards mechanical direct seeding methods. In many circumstances, however, mechanical direct seeding is unreliable and most mechanisms lack the versatility needed to plant a variety of native species in a range of sowing environments. Results of a global survey of restoration practitioners uncovered that seeding depth precision and accuracy is extremely important when distributing many native seeds. In order to guide improvements to the design of native seeders that are used in the Pilbara region of Western Australia, we studied the maximum and optimal emergence depth of a species crucial to restoration in the region, Triodia pungens (soft spinifex). Results showed that the current practice of broadcasting seeds on the soil surface may be inadequate to facilitate germination, and that covering seeds to 5 mm yields optimal emergence. Seedling emergence dropped off considerably at 10 mm with almost no emergence occurring once seeds were sown to 30 mm. Most mechanical seeders currently in operation are unable to control depth to this level of precision, particularly on the rocky and uneven terrain associated with mine waste dumps. Future designs should focus on improving depth control in such conditions.

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Digital Farming and Field Robotics: Internet of Things, Cloud Computing, and Big Data

Paraforos

Griepentrog

2021

Agriculture Automation and Control

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Implementation of a magnetorheological damper on a no-till seeding assembly for optimising seeding depth

Cited by 19 publications

References 14 publications

Validating the Model of a No-Till Coulter Assembly Equipped with a Magnetorheological Damping System

Validating the Model of a No-Till Coulter Assembly Equipped with a Magnetorheological Damping System

Improvements to mechanical direct seeder design guided by the optimal sowing depth of soft spinifex (Triodia pungens)

Digital Farming and Field Robotics: Internet of Things, Cloud Computing, and Big Data

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