Performance Improvement of the Horizontal Control System for a Tractor Implement Using Sensor Signal from the Front Axle

Ro, Youngmin; Moon, Jun-Hee; Kim, Kyeong Uk

doi:10.5307/jbe.2016.41.2.067

Cited by 2 publications

(9 citation statements)

References 5 publications

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“…They comprise an electrolyte-type tilt sensor to measure the rolling angle of the vehicle, a cylinder position sensor to detect the current position of the implement, and an on/off flow valve to operate a horizontal cylinder. However, these systems lack precision and speed for controlling the horizontal attitude of implements owing to their inevitable time delays and dead zones, [5][6][7] which presents problems such as uncultivated fields and work-field level fluctuations. 7 Consequently, the customer demand for more precise and accurate implementation of leveling-control systems is growing, but the end-users of these systems are highly dissatisfied owing to the dearth of performance evaluation studies since the development of these systems.…”

Section: Introductionmentioning

confidence: 99%

“…However, these systems lack precision and speed for controlling the horizontal attitude of implements owing to their inevitable time delays and dead zones, [5][6][7] which presents problems such as uncultivated fields and work-field level fluctuations. 7 Consequently, the customer demand for more precise and accurate implementation of leveling-control systems is growing, but the end-users of these systems are highly dissatisfied owing to the dearth of performance evaluation studies since the development of these systems. 7 Generally, electrolyte and acceleration sensor-type tilt sensors are used in the commercial implement leveling-control systems currently available in the South Korean market.…”

Section: Introductionmentioning

confidence: 99%

“…7 Consequently, the customer demand for more precise and accurate implementation of leveling-control systems is growing, but the end-users of these systems are highly dissatisfied owing to the dearth of performance evaluation studies since the development of these systems. 7 Generally, electrolyte and acceleration sensor-type tilt sensors are used in the commercial implement leveling-control systems currently available in the South Korean market. The electrolyte sensor measures the angle with respect to the degree of inclination of the viscous liquid present inside the sensor.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, hunting can frequently occur because the operation speed remains constant under all instances. 3,7,9 In particular, a certain range of dead zone can be set using a simple on/off solenoid to prevent hunting in a hydraulic cylinder operating at a constant speed; consequently, the precise control of implement attitude cannot be easily achieved. To improve these leveling-control systems, the tractor attitude should be accurately and rapidly detected, and precise hydraulic control should be performed based on the detected attitude.…”

Section: Introductionmentioning

confidence: 99%

“…To improve these leveling-control systems, the tractor attitude should be accurately and rapidly detected, and precise hydraulic control should be performed based on the detected attitude. Thus, Ro et al 7 conducted a study to increase the reaction speed by installing a rolling angle sensor on the front axle of the tractor, and they reported that the root-mean-square error (RMSE) reduced by 44.6% in comparison to the conventional system.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Development of a rolling angle estimation algorithm to improve the performance of implement leveling-control systems for agricultural tractors

Yu¹,

Park

Cheon³

et al. 2022

Advances in Mechanical Engineering

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Agricultural tractors are connected with various implements such as plow, baler, rotovator, and loader for performing agricultural work. In particular, the rotovator is used to crush and uniformly spread the soil after plowing operations. However, achieving uniformly spread soil and flattened fields using rotovator can be extremely challenging, because the soil is often pushed to a particular side or remains on a slope owing to the variations in soil composition, plowing depth, and the skill level of workers, which consequently affects the transplantation work. This study aims to analyze the prediction accuracy of the implement and tractor attitudes as a reference standard by (a) developing an algorithm to predict the implement attitude based on the hitch height, support points of the lower link and lift rod, and distance between the lower links, through four-section link mathematical modeling for a three-point hitch system, and (b) using an observer to predict the tractor attitude using a Kalman filter with gyroscopic and acceleration sensors. We developed a control algorithm using the gyroscopic and acceleration information from the sensor to improve the precision and adjustment speed of the conventional tractor–implement leveling-control system. In addition, the performance improvement was verified by comparing the conventional and proposed systems. The results revealed that the error rates in the proposed system were up to 72% less than those of the conventional system, implying that the control performance of the stated system could be improved by reducing the implement attitude estimation error and tractor attitude measurement delay.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development of a rolling angle estimation algorithm to improve the performance of implement leveling-control systems for agricultural tractors

Yu¹,

Park

Cheon³

et al. 2022

Advances in Mechanical Engineering

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Tractor Three-Point Hitch Control for an Independent Lower Arms System

Chukewad,

Chadha,

Jagdale

et al. 2024

AgriEngineering

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The three-point hitch, found on agricultural tractors, facilitates the raising and lowering of an attached implement. Some tractors include a rock shaft that comprises a physical shaft that interconnects and facilitates the raising and lowering of the lower arms of the three-point hitch in a synchronized manner. In this study, we deal with a hitch system with the lower arms actuated by two independent hydraulic cylinders. This innovative tractor hitch system design allows the implement to follow the terrain, instead of the tractor, about the fore–aft (roll) axis of the tractor. However, since the two lower arms are independent, a specialized controller is needed to move these arms in unison. First, we present a position controller for individual arms and a roll controller to move these arms together. Second, we present a unique algorithm to emulate a physical rock shaft while the implement is operating in float mode. The algorithm ensures that the implement does not roll around the fore–aft axis while making sure it moves up and down vertically to follow the terrain. We present experimental results from the step response of the hitch system’s height while tracking a velocity reference. With the roll of the implement defined as the difference between the left arm’s position in percentage and that of the right arm in percentage, we observe that the largest mean roll was 0.23% with a flail mower attached and 0.26% without any implement. We then present results from the implement’s position in the float mode when the software rock shaft was activated and compare them with the case without the software rock shaft. The experiments showed that, when the software rock shaft was turned on, the mean roll reduced from 4.64% to 0.58% with a seed drill implement and from −3.99% to −0.59% with a flail mower implement. The standard deviations in these two implement cases improved from 16.77% to 2.79% and 6.45% to 3.53%, respectively, proving the effectiveness of the software rock shaft and its potential to replace the physical rock shaft found on the traditional tractors.

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Performance Improvement of the Horizontal Control System for a Tractor Implement Using Sensor Signal from the Front Axle

Cited by 2 publications

References 5 publications

Development of a rolling angle estimation algorithm to improve the performance of implement leveling-control systems for agricultural tractors

Development of a rolling angle estimation algorithm to improve the performance of implement leveling-control systems for agricultural tractors

Tractor Three-Point Hitch Control for an Independent Lower Arms System

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