東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

Design and Development of an Automatic Steering System for Agricultural Towed Implements.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Design and Development of an Automatic Steering System for Agricultural Towed Implements./
作者:	Delavarpour, Nadia.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
面頁冊數:	136 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-11, Section: B.
Contained By:	Dissertations Abstracts International83-11B.
標題:	Agricultural engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29069405
ISBN:	9798438799009

Design and Development of an Automatic Steering System for Agricultural Towed Implements.
Delavarpour, Nadia.

Design and Development of an Automatic Steering System for Agricultural Towed Implements. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 136 p.

Source: Dissertations Abstracts International, Volume: 83-11, Section: B.

Thesis (Ph.D.)--North Dakota State University, 2022.

This item must not be sold to any third party vendors.

While an auto steered tractor can improve the overall accuracy and efficiency of an operation, for operations that involve towing an implement, a significant portion of the efficiency reduction comes from uncontrolled motions of the towed implement. Therefore, there is a crucial need to study auto steering system for towed implement as well. In this study different requirements of an auto steering system for a towed implement were developed and studied. In this study the guiding performance of two local positioning sensors (Tactile and Ultrasonic sensors) under similar conditions were studied for reading different trajectories at different traveling speed. Furthermore, a fuzzy logic control algorithm was developed to continually generate correction steering signals and keep the tractor and towed implement within a certain boundary of the reference trajectory. Finally, the designed controller was implemented in a hardware-in-loop (HIL) system to analyze the performance of the controller in real world conditions. The result of this study showed that although the local guidance sensors could locate the tractor or towed implement positions with respect to plant rows accurately, limitations to the performance of sensors were also observed in certain conditions. Sensors were prone to various noises and digital filters were required to apply to collected data. Data analysis showed that at lower speeds (less than 1.79 m/s) the accuracy of sensors was ±2 cm or better. The fuzzy logic controller improved the trajectory tracking accuracy at slow speeds (1-5 m/s) for following non-complex trajectories while no major improvements were achieved for complex trajectories at these speeds. Therefore, the controller had an acceptable accuracy following straight trajectory with negligible deviations at slow speeds. Moreover, experimental results showed that the hydraulic cylinder followed the controller signals with sufficient accuracy. During the experiment the angular displacements remained in the range of ±10˚ and never hit the constraint of maximum achievable angle, which was ±30˚. The satisfactory results showed that the designed automatic steering control system has a good tracking performance with a fast response, thus meeting the navigation control requirement of agricultural equipment to a certain extent.

ISBN: 9798438799009Subjects--Topical Terms:

3168406
Agricultural engineering.
Subjects--Index Terms:

Automatic steering system

Design and Development of an Automatic Steering System for Agricultural Towed Implements.
LDR:03449nmm a2200349 4500 001 2351466
005 20221107085652.5
008 241004s2022 ||||||||||||||||| ||eng d
020 $a 9798438799009
035 $a (MiAaPQ)AAI29069405
035 $a AAI29069405
040 $a MiAaPQ $c MiAaPQ
100 1 $a Delavarpour, Nadia. $0 (orcid)0000-0002-7141-7415 $3 3691038
245 1 0 $a Design and Development of an Automatic Steering System for Agricultural Towed Implements.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2022
300 $a 136 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-11, Section: B.
500 $a Advisor: Bajwa, Sreekala G.
502 $a Thesis (Ph.D.)--North Dakota State University, 2022.
506 $a This item must not be sold to any third party vendors.
520 $a While an auto steered tractor can improve the overall accuracy and efficiency of an operation, for operations that involve towing an implement, a significant portion of the efficiency reduction comes from uncontrolled motions of the towed implement. Therefore, there is a crucial need to study auto steering system for towed implement as well. In this study different requirements of an auto steering system for a towed implement were developed and studied. In this study the guiding performance of two local positioning sensors (Tactile and Ultrasonic sensors) under similar conditions were studied for reading different trajectories at different traveling speed. Furthermore, a fuzzy logic control algorithm was developed to continually generate correction steering signals and keep the tractor and towed implement within a certain boundary of the reference trajectory. Finally, the designed controller was implemented in a hardware-in-loop (HIL) system to analyze the performance of the controller in real world conditions. The result of this study showed that although the local guidance sensors could locate the tractor or towed implement positions with respect to plant rows accurately, limitations to the performance of sensors were also observed in certain conditions. Sensors were prone to various noises and digital filters were required to apply to collected data. Data analysis showed that at lower speeds (less than 1.79 m/s) the accuracy of sensors was ±2 cm or better. The fuzzy logic controller improved the trajectory tracking accuracy at slow speeds (1-5 m/s) for following non-complex trajectories while no major improvements were achieved for complex trajectories at these speeds. Therefore, the controller had an acceptable accuracy following straight trajectory with negligible deviations at slow speeds. Moreover, experimental results showed that the hydraulic cylinder followed the controller signals with sufficient accuracy. During the experiment the angular displacements remained in the range of ±10˚ and never hit the constraint of maximum achievable angle, which was ±30˚. The satisfactory results showed that the designed automatic steering control system has a good tracking performance with a fast response, thus meeting the navigation control requirement of agricultural equipment to a certain extent.
590 $a School code: 0157.
650 4 $a Agricultural engineering. $3 3168406
650 4 $a Remote sensing. $3 535394
650 4 $a Automotive engineering. $3 2181195
653 $a Automatic steering system
653 $a Tractor
653 $a Towing
690 $a 0539
690 $a 0799
690 $a 0540
710 2 $a North Dakota State University. $b Agricultural and Biosystems Engineering. $3 3435705
773 0 $t Dissertations Abstracts International $g 83-11B.
790 $a 0157
791 $a Ph.D.
792 $a 2022
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29069405