Development of an Attitude Adjustment Crawler Chassis for Combine Harvester and Experiment of Adaptive Leveling System

Hu, Jinpeng; Pan, Jianji; Dai, Buwang; Chai, Xiaoyu; Sun, Yixin; Xu, Lizhang

doi:10.3390/agronomy12030717

Cited by 11 publications

(3 citation statements)

References 20 publications

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“…The height adjustable, also known as the active levelling system is claimed to have better stability on uneven ground surfaces to improve the working stability of the machine. This system would also help minimise the effect of threshing and separation when on an uneven and rough surface (Hu et al, 2022). This type of machine has not yet been fully tested scientifically and technically in Malaysian paddy fields, hence requires a specific experiment.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Height Adjustable Mini Combine Harvester

Ahmad,

Khadzir

2023

Adv Agric Food Res J

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Mini combine harvesters have been very popular among paddy farmers. The compact size of the machine, in addition to the axial flow threshing mechanism and the effect of low ground pressure on paddy soil, makes it a potential alternative for efficient paddy harvesting of a height-adjustable mini combine harvester used for harvesting paddy fields. This type of harvester was tested in typical paddy field conditions planted with MR297 variety at MARDI Seberang Perai. The performance tests included measuring theoretical and effective field capacity, field efficiency, soil bearing capacity before and after machine disturbance and machine slippage. The fuel consumption was also recorded. The combined harvesting losses were also measured during the experiment. Results showed that in wet and muddy conditions, the mini combine harvester obtained a theoretical field capacity (TFC) of 1.28 ha/hr, effective field capacity (EFC) of 0.94 ha/hr and a field efficiency (FE) of 73.4%. The average fuel consumption of the mini combine harvester was 25 L /ha. The wheel slippage in wet paddy fields was 2.18% and on farm roads was 1.55%. The mini combine harvester also contributed to producing less ground effects, combined with the use of low ground contact pressure tracks, that caused minimal soil disturbance that would affect the soil hardpan layer. This mini combine harvester produced an average harvesting loss of 2.3% with an average harvesting impurity of 10.65%. The mini combine harvester had enough power to move in typical paddy field conditions, with no soft soil problems. The mini combine harvester was able to turn 360 degrees within a small area, which made it suitable for harvesting in paddy fields. Thus, this mini combine harvester has the potential to be used for paddy harvesting with the ability to not only produce minimal harvesting loss, but also produce less ground contact pressure which can help to manage the soil hardpan layer from being easily damaged.

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Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Height Adjustable Mini Combine Harvester

Ahmad,

Khadzir

2023

Adv Agric Food Res J

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“…Hu. et al [15] introduced an adaptive leveling system for combine harvesters, utilizing a novel four-point lift-adjustable tracked chassis. Through an analysis of the adjustment characteristics under various attitude adjustment conditions within the RecurDyn environment, the researchers investigated the working principle of the proposed adjustment mechanism.…”

Section: Introductionmentioning

confidence: 99%

Simulation Analysis and Testing of Tracked Universal Chassis Passability in Hilly Mountainous Orchards

Mou,

Luo,

et al. 2023

Agriculture

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In the process of orchard mechanization, passability serves as a crucial criterion for evaluating the effectiveness of the chassis. To address the adaptability of hilly and mountainous multifunctional work machines to complex terrain, a theoretical analysis was conducted to assess the chassis’ performance under three key working conditions: climbing, crossing obstacles, and crossing trenches. Using kinematics, the theoretical maximum climbing angle, maximum obstacle height, and maximum trench width were calculated to be 35.8°, 170.4 mm, and 427 mm, respectively. Additionally, the passability of the chassis model was simulated under these working conditions in different soil environments using RecurDyn dynamics software. Post-processing techniques were employed to extract time characteristic curves for parameters such as center-of-mass velocity, pitch angle, offset, lateral inclination angle, and longitudinal displacement, providing valuable insights into how these parameters changed during chassis movement. The results revealed that the maximum gradient for slope climbing was 30°, the maximum height for obstacle crossing was 150 mm, and the maximum width for trench crossing was 400 mm. The prototype was then tested under these theoretical and simulated conditions in the field, and its ability to smoothly traverse slopes with a 35° angle in first gear, climb vertical obstacles up to a height of 200 mm, and pass through trenches with a width of 430 mm was demonstrated. The crawler chassis exhibited stable performance within the design parameters, aligning closely with the simulated and theoretical expectations. Overall, this study provides valuable theoretical insights for the structural design of multipurpose chassis suitable for orchards in hilly and mountainous regions.

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“…In addition, the vehicle shifting system based on active suspension requires the installation of additional vehicle shifting devices, and the structure is very complex, for example, the vehicle height adjustment system based on air suspension inflates and deflates the air on the spring through the air pump to change the vehicle body height, and the system requires additional components such as an air pump, an air storage tank, and an air filling and deflating line [ 8 , 9 ]. The vehicle height adjustment based on hydro-pneumatic suspension uses a hydraulic oil pump to charge or discharge oil on the hydraulic cylinder, and the vehicle height is adjusted by the movement of the hydraulic piston, the system requires the installation of a hydraulic oil pump, oil tank, hydraulic piping and other components [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Research and application of a new method for adjusting the vehicle body height

Yao

2022

PLoS ONE

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The use of active suspension for vehicle height adjustment has problems of high cost, high energy consumption, slow response, and complex structure. This paper proposes a new method for adjusting the vehicle body using the damping asymmetric characteristic of semi-active suspensions, which is based on the idea that the dampers with damping asymmetric characteristics will cause a change in the mean position of the vehicle body vibration. To verify the feasibility of this method, a single-wheel vehicle model containing asymmetric damping is established. The system’s responses under the sinusoidal and random roads excitation are obtained by the fourth-order Runge-Kutta method, the influences of key parameters on the vehicle body’s shifting height are analyzed, and the mechanism of vehicle body’s shift is explained from the perspective of energy conservation. Then a vehicle body height controller based on third-order linear active disturbance rejection control (LADRC) is designed. Simulation results show that the proposed method for controlling the vehicle height with asymmetric damping can quickly adjust the vehicle to the expected height whether under the sinusoidal road or random road. In addition, no additional hardware and energy consumption are required, providing a new idea for vehicle height control.

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Development of an Attitude Adjustment Crawler Chassis for Combine Harvester and Experiment of Adaptive Leveling System

Cited by 11 publications

References 20 publications

Performance Evaluation of a Height Adjustable Mini Combine Harvester

Performance Evaluation of a Height Adjustable Mini Combine Harvester

Simulation Analysis and Testing of Tracked Universal Chassis Passability in Hilly Mountainous Orchards

Research and application of a new method for adjusting the vehicle body height

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