The Effect of Design Parameters on the Force and Energy Requirement for Cutting Oil Palm Fronds Using Magnetic Force

Ahmad, Mohd Rizal; Jamaludin, Nordin; Jelani, Abdul Razak; Bakri, Azwan; Shuib, Abd Rahim

doi:10.11113/jt.v82.14236

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Two assumptions were made in this study. The rst assumption is that the exerted harvesting force of 303.5N is the sum of the pulling force produced by the harvesters (300N [23]) and the weight of the harvesting tool (3.5N [24]). The second assumption is that the harvesting force was equally distributed to the left and right hands.…”

Section: Musculoskeletal Model and Simulationmentioning

confidence: 99%

Musculoskeletal Modelling And Simulation Of Oil Palm Fresh Fruit Bunch Harvesting

Chan

Teo

Gouwanda

et al. 2022

Preprint

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This study aims to create and evaluate an upper extremity musculoskeletal model of the oil palm harvesting motion and assess the Musculoskeletal Disorder (MSD) risk of this activity. Tests were conducted on six harvesters at a Malaysia oil palm plantation. Six Inertial Measurement Units (IMU) and Surface Electromyography (sEMG) were used to collect kinematics of the back, shoulder and elbow joints and measure the muscle activations of longissimus, multifidus, biceps and triceps. A musculoskeletal model was constructed and simulated using the IMU data. The results were benchmarked against the commercial motion capture tool and sEMG. It was found that joint angle had the maximum coefficient of correlation (R) of 0.99 and minimum Root Mean Square Error of 1.84°, whereas muscle activation had the maximum R of 0.87 and minimum Mean Absolute Error of 0.10. This study showed that the longissimus was more actively used than multifidus, and the biceps was another primary muscle relied on during harvesting. The harvesters faced a higher risk of MSD while performing back flexion, back rotation, shoulder flexion and elbow flexion. Lastly, it demonstrated the feasibility of the musculoskeletal modelling and simulation to further investigate the upper extremity joints and muscles during harvesting.

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Section: Musculoskeletal Model and Simulationmentioning

confidence: 99%

Musculoskeletal Modelling And Simulation Of Oil Palm Fresh Fruit Bunch Harvesting

Chan

Teo

Gouwanda

et al. 2022

Preprint

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“…In palm oil plantations, harvesting fresh fruit bunch (FFB) from palm trees is still a major challenge that needs to be solved. Therefore, a motorised oil palm cutter named CANTAS has been developed to address this issue (Figure 1) (Ahmad et al, 2020). By using CANTAS, the productivity of an oil palm plantation can be increased; therefore, reducing the number of labours required for the plantation's operation.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Design Analysis and Improvement of Aluminium Alloy Cantas Sickle Blade Using Finite Element Method Simulation

Ramli¹

2022

JOPR

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This article explores the possibility of improving the design of CANTAS, by focusing on the failure analysis and the design optimisation of its sickle blade. The sickle blade material was replaced with 6262-T8 aluminium alloy. An analysis to inspect the sickle's mechanical strength against 300 N of cutting force was simulated using the finite element method (FEM) software. The total stress experienced by the new design (i.e., 1204 MPa) exceeded the material's ultimate tensile strength of 390 MPa; therefore, would break due to mechanical failure. The dimension of the weak point on the sickle was then increased to 25%. The improved sickle design only experienced 314 MPa of stress and did not exceed its ultimate tensile strength. The design was further optimised to reduce its weight. A reduction of 14% was achieved compared to the previous improved design and 69.7% compared to the original spring steel sickle with only 352 MPa of stress experienced. It also can withstand any directional impact force in drop test simulation. The aluminium alloy sickle is also 48% cheaper than spring steel sickle. However, a cost per tonne of productivity calculation shows that the performance of both sickle materials is very much the same.

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Simulation of passive exotendon assistive device for agricultural harvesting task

et al. 2023

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This study proposes and investigates the feasibility of the passive assistive device to assist agricultural harvesting task and reduce the Musculoskeletal Disorder (MSD) risk of harvesters using computational musculoskeletal modelling and simulations. Several passive assistive devices comprised of elastic exotendon, which acts in parallel with different back muscles (rectus abdominis, longissimus, and iliocostalis), were designed and modelled. These passive assistive devices were integrated individually into the musculoskeletal model to provide passive support for the harvesting task. The muscle activation, muscle force, and joint moment were computed with biomechanical simulations for unassisted and assisted motions. The simulation results demonstrated that passive assistive devices reduced muscle activation, muscle force, and joint moment, particularly when the devices were attached to the iliocostalis and rectus abdominis. It was also discovered that assisting the longissimus muscle can alleviate the workload by distributing a portion of it to the rectus abdominis. The findings in this study support the feasibility of adopting passive assistive devices to reduce the MSD risk of the harvesters during agricultural harvesting. These findings can provide valuable insights to the engineers and designers of physical assistive devices on which muscle(s) to assist during agricultural harvesting.

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The Effect of Design Parameters on the Force and Energy Requirement for Cutting Oil Palm Fronds Using Magnetic Force

Cited by 4 publications

References 4 publications

Musculoskeletal Modelling And Simulation Of Oil Palm Fresh Fruit Bunch Harvesting

Musculoskeletal Modelling And Simulation Of Oil Palm Fresh Fruit Bunch Harvesting

Mechanical Design Analysis and Improvement of Aluminium Alloy Cantas Sickle Blade Using Finite Element Method Simulation

Simulation of passive exotendon assistive device for agricultural harvesting task

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