DEVELOPMENT OF AN AUTOMATIC FURROW GUIDANCE SYSTEM FOR TRACTOR-MOUNTED IMPLEMENTS: OUTLINE AND BASIC CHARACTERISTIC OF THE HYDRAULIC CONTROL SYSTEM.
Saved in:
| Title: | DEVELOPMENT OF AN AUTOMATIC FURROW GUIDANCE SYSTEM FOR TRACTOR-MOUNTED IMPLEMENTS: OUTLINE AND BASIC CHARACTERISTIC OF THE HYDRAULIC CONTROL SYSTEM. |
|---|---|
| Authors: | Shen, B.1, Satow, T.2,3 fmsatow@obihiro.ac.jp |
| Source: | Transactions of the ASABE. Mar/Apr2012, Vol. 55 Issue 2, p333-339. 7p. |
| Subjects: | Hydraulic control systems, Electrohydraulic effect, Solenoids, Electrical engineering, Furrow irrigation |
| Abstract: | The purpose of this study was to develop a hydraulic control system (HCS) as a control unit around which an automatic furrow guidance system (AFGS) for tractor-mounted implements might be developed. The HCS consisted of a hydraulic cylinder slide device, a hydraulic pump, and an electrohydraulic proportional flow and direction control valve (solenoid valve). The basic specifications for the HCS are a hydraulic pressure of 6.8 MPa and flow capacity of 22 L min-1 for the pump, and the fastest speed of the double-acting cylinder, which is mounted to the lower link of a tractor's three-point hitch, needs to be 150 mm s-1. In order to evaluate the basic pressure control characteristic of the HCS, system responses were measured for a step and a simulated crop row input in the laboratory. In field tests, the implement was attached to the three-point hitch linkage of a tractor, with the tractor traveling speed set at 0.5, 1.0, and 1.5 m s-1, to evaluate the crop row and line marker tracking accuracy of the HCS. In the laboratory experiments, the computer needed 0.22 s to calculate and send the control signal to the solenoid valve, which then initiated the hydraulic cylinder movement in 0.07 s. For the frequency response, the cutoff frequency calculated was 0.25 Hz, and the phase delay was 56°. In other words, this guidance system was able to adjust the implements in 3.8 cm s-1. According to earlier research, the maximum adjustment speed permissible for crop row variation was 3.3 cm s-1. The RMS error of the HCS was less than 2.0 cm in tracking the line marker and less than 2.5 cm for crop rows in the field experiments. However, the implement tines did not actually engage the soil in the field experiments. [ABSTRACT FROM AUTHOR] |
| Copyright of Transactions of the ASABE is the property of American Society of Agricultural & Biological Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 76356020 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: DEVELOPMENT OF AN AUTOMATIC FURROW GUIDANCE SYSTEM FOR TRACTOR-MOUNTED IMPLEMENTS: OUTLINE AND BASIC CHARACTERISTIC OF THE HYDRAULIC CONTROL SYSTEM. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Shen%2C+B%2E%22">Shen, B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Satow%2C+T%2E%22">Satow, T.</searchLink><relatesTo>2,3</relatesTo><i> fmsatow@obihiro.ac.jp</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Transactions+of+the+ASABE%22">Transactions of the ASABE</searchLink>. Mar/Apr2012, Vol. 55 Issue 2, p333-339. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Hydraulic+control+systems%22">Hydraulic control systems</searchLink><br /><searchLink fieldCode="DE" term="%22Electrohydraulic+effect%22">Electrohydraulic effect</searchLink><br /><searchLink fieldCode="DE" term="%22Solenoids%22">Solenoids</searchLink><br /><searchLink fieldCode="DE" term="%22Electrical+engineering%22">Electrical engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Furrow+irrigation%22">Furrow irrigation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The purpose of this study was to develop a hydraulic control system (HCS) as a control unit around which an automatic furrow guidance system (AFGS) for tractor-mounted implements might be developed. The HCS consisted of a hydraulic cylinder slide device, a hydraulic pump, and an electrohydraulic proportional flow and direction control valve (solenoid valve). The basic specifications for the HCS are a hydraulic pressure of 6.8 MPa and flow capacity of 22 L min-1 for the pump, and the fastest speed of the double-acting cylinder, which is mounted to the lower link of a tractor's three-point hitch, needs to be 150 mm s-1. In order to evaluate the basic pressure control characteristic of the HCS, system responses were measured for a step and a simulated crop row input in the laboratory. In field tests, the implement was attached to the three-point hitch linkage of a tractor, with the tractor traveling speed set at 0.5, 1.0, and 1.5 m s-1, to evaluate the crop row and line marker tracking accuracy of the HCS. In the laboratory experiments, the computer needed 0.22 s to calculate and send the control signal to the solenoid valve, which then initiated the hydraulic cylinder movement in 0.07 s. For the frequency response, the cutoff frequency calculated was 0.25 Hz, and the phase delay was 56°. In other words, this guidance system was able to adjust the implements in 3.8 cm s-1. According to earlier research, the maximum adjustment speed permissible for crop row variation was 3.3 cm s-1. The RMS error of the HCS was less than 2.0 cm in tracking the line marker and less than 2.5 cm for crop rows in the field experiments. However, the implement tines did not actually engage the soil in the field experiments. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Transactions of the ASABE is the property of American Society of Agricultural & Biological Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=76356020 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.13031/2013.41371 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 333 Subjects: – SubjectFull: Hydraulic control systems Type: general – SubjectFull: Electrohydraulic effect Type: general – SubjectFull: Solenoids Type: general – SubjectFull: Electrical engineering Type: general – SubjectFull: Furrow irrigation Type: general Titles: – TitleFull: DEVELOPMENT OF AN AUTOMATIC FURROW GUIDANCE SYSTEM FOR TRACTOR-MOUNTED IMPLEMENTS: OUTLINE AND BASIC CHARACTERISTIC OF THE HYDRAULIC CONTROL SYSTEM. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Shen, B. – PersonEntity: Name: NameFull: Satow, T. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar/Apr2012 Type: published Y: 2012 Identifiers: – Type: issn-print Value: 21510032 Numbering: – Type: volume Value: 55 – Type: issue Value: 2 Titles: – TitleFull: Transactions of the ASABE Type: main |
| ResultId | 1 |
