Xiao Lai

Simulation and Experimental Study on Sugarcane Field Excitation to the Cutter

The Sugarcane field excitation has notable influence on the sugarcane cutting quality, but its mechanism has seldom been studied. Based on the dynamic model analysis, this paper measure, analysis and test how the field excitation impacts the vibration of the cutter. After building up 3D model of the vehicle and field system, virtual simulation analysis on it is carried out, deducing that the frequency of field unevenness has notable influence on the vibration of the cutter. In physical experiment, it compares and analyzes the vibration of the cutter and cutting quality under different frequencies of field unevenness. The result shows that, the frequency of field unevenness has magnificent influence on the vibration of the cutter, and the higher the frequency the more deteriorated the sugarcane cutting quality.

Small Sugarcane Harvester Conveying Failure Analysis

The small sugarcane harvester is the main model that it is fitted for hilly areas, but it is vulnerable to conveying failure. To breakthrough the limitation of individual harvester`s structural improvement traditionally, Traditionally structural improvement to the individual harvester is not generally effective to solve it. This paper finds that the relationship between the randomness of the sugarcane growth and the harvester conveying capabilities should be taken into consideration so as to avoid the conveying failure risk of sugarcanes stacking up. Queuing theory is introduced to establish the mathematical model of cane feeding to and conveying through the harvester and the analysis shows that the higher the speed of sugarcane conveying the less possibility there is congestion. Using virtual simulation technology, this paper simulates the process of canes flow feeding into the harvester based on FLEXSIM and finds that increasing conveying speed from 0.8 m/s to 1.6 m/s would lead to the possibility of congestion being reduced from 20.3%to 6.28%.This paper proposes a way to increase the conveying speed of the harvester by minor retrofit without increasing the driving power. Field experiment shows that the congestion rate is getting lower as the conveying speed increases and it is better to keep the conveying speed at least higher than 1.1m/s. Therefore, improving the conveying speed provides a new idea to reduce conveying congestion for the small scale sugarcane harvester. Keywords—small sugarcane harvester; conveying failure; queuing theory; virtual simulation

Dynamical Analysis on Sugarcane Cutter Rigidity Enhancement

Improving the cutting performance, especially the cutting quality of sugarcane harvesters is the most magnificent problem for popularizing the application of the havesters. Much research has been done on most effect factors but rare on the influence of rigidity enhancement of sugarcane cutter. Indeed, the rigidity of sugarcane cutter has notable influence on the quality of sugarcane cutting，as it effects its vibration and the vibration in turn brings great damage to the cutting quality. This paper analyzes how the rigidity of sugarcane cutter effects its working vibration by building up its mathematical model, then further investigates it by making a dynamical simulation analysis to compare two cutter structures with different rigidity based on ANSYS and ADAMS, and validate the actual effect of enhancing the cutter rigidity through a physical experiment. The result shows enhancing the rigidity of the cutter could lead to notable improvement of sugarcane cutting quality.

Simulation Analysis and Experimental Study on Rigidity Enhancement of Sugarcane Harvester Cutter

The rigidity of sugarcane cutter has notable influence on the quality of sugarcane cutting,the most concerned problem of sugarcane harvester developing currently,as it effects its vibration and the vibration in turn brings great damage to the cutting quality on which rare research has been done. This paper took altering a sensitive parameter of the cutter rigidity, the distance between the bears of the shaft as a case to investigate how the enhancement of the cutter rigidity brought the improvement of the cutting quality by applying ADAMS program to perform dynamic simulation of the cutting process after designing their 3D models in Pro/Engineering and making ANSYS analysis of the according effects. Further, a physical experiment following showed that proper design of the distance between the cutter shaft bearings that enhancing 23.67% of its rigidity could lead to 29.20% improvement of the sugarcane cutting quality.

Virtual Simulation Analysis and Experiment Study on a New Peel Scratch Relieving Design of Sugarcane Leaf Cleaning Device

Relieving peel-scratch without raising the remnant leaf rate is the bottleneck in further perfecting the key component of the small-sized sugarcane harvester, the cleaning device. Therefore, to solve this dilemma, a new arrangement design of cleaning elements of sugarcane leaf cleaning device is proposed based on the cleaning mechanism analysis. To obtain the crucial effecting parameters and evaluate the motion and dynamic function of this design quickly and efficiently, virtue prototype technology is applied to build up a three-dimension model and perform a simulation analysis on the automatic dynamic analysis of mechanical system (ADAMS).Thereafter, a comparison experiment study between the new arrangement and the old ones ensued, confirming the previous analysis that the new arrangement design of cleaning elements do significantly relieve sugarcane peel scratch 10%~28% and still maintain satisfying cleaning effect. This provides reference to tackle the design dilemma in such a quick and efficient way.