Dynamic Model of Hip and Ankle Joints Loading during Working with a Motorized Backpack Sprayer
Journal Title: Journal of Agricultural Machinery - Year 2024, Vol 14, Issue 1
Abstract
The main objective of this paper is to develop a seven-link dynamic model of the operator’s body while working with a motorized backpack sprayer. This model includes the coordinates of the sprayer relative to the body, the rotational inertia of the sprayer, the muscle moments acting on the joints, and a kinematic coupling that keeps the body balanced between the two legs. The constraint functions were determined and the non-linear differential equations of motion were derived using Lagrangian equations. The results show that undesirable fluctuations in the ankle force are noticeable at the beginning and end of a swing phase. Therefore, injuries to the ankle joint are more likely due to vibrations. The effects of engine speed and sprayer mass on the hip and ankle joint forces were then investigated. It is found that the engine speed and sprayer mass have significant effects on the hip and ankle forces and can be used as effective control parameters. The results of the analysis also show that increasing the engine speed increases the frequency of the hip joint force. However, no significant effects on the frequency of the ankle joint force are observed. The results of this study may provide researchers with insight into estimating the allowable working hours with the motorized backpack sprayers, prosthesis design, and load calculations of hip implants in the future.
Authors and Affiliations
S. Karimi Avargani,A. Maleki,Sh. Besharati,R. Ebrahimi,
Keywords
Related Articles
- EP ID EP731760
- DOI https://doi.org/10.22067/jam.2023.82788.1171
- Views 46
- Downloads 0
Viscoelastic modeling of apples under quasi-static loading using finite element method to investigate the causes of bruising
Introduction: Apple is one of the most important horticultural crops of Iran. Its production in the country stands in the second place after citrus. Iran holds the fourth place in the world production of apples and gains...
The Effect of Nozzle Types and Time of Herbicide Incorporation in Soil on Corn (Zea mays L.) Weed Control
This experiment was conducted to study the effect of nozzle types and the time of herbicide incorporation in soil on weed control, using split plot design by randomized block design. The main plots were soil and herbicid...
Analysis of the Exergy of Combustion the Diesel and Biodiesel Fuel in a DI Diesel Engine
IntroductionIn recent years, the exergy analysis method has been widely used in the design, simulation and performance assessment of various thermal systems. In this regard, this method may be applied to various types of...
Optimization of the Mixing in a Gas-lift Anaerobic Digester of Municipal Wastewater Sludge
This research aims to optimize the mixing process in gas-lift anaerobic digesters of municipal sewage sludge since mixing and maintaining uniform contact between methanogenic bacteria and nutrients is essential. Wastewat...
Modeling Grain Losses in Mechanized Harvesting of Oily Sunflower
Introduction Sunflower planting is mostly carried out for two particular purposes; oil production and as nut. Harvesting is one of the biggest problems in both types of sunflower. The difficulty of harvesting and less sc...