| Author | Chanoknun Sookkumnerd |
| Call Number | AIT Thesis no. AE-00-02 |
| Subject(s) | Tractors--Vibration
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AE-00-02 |
| Abstract | Walking tractor is one of the most important machine in Thai agriculture, especially in small-scale farming. However, using walking tractor in farm is hard work and high level of vibration also contributes toward it. This research was conducted to investigate the characteristics of walking tractor vibrations in different operating conditions. The characteristics of vibration lead to identify the causes of vibrations. Analysis on frequency-domain mode (spectrum analysis) was employed in study of walking tractor vibration characteristics. The vibration signals from engine excitation showed that the dominant frequencies were engine frequency and their harmonics. The signals of excitation from cage-wheel showed that the dominant frequency shifted to relatively low frequency range compared to the case of engine excitation. Engine was the major source of excitation for almost all testing conditions, except in transporting mode on asphalt road, in which excitation from cage-wheel became major excitation. To reduce walking tractor vibration, vibration isolators were used. Rubber spring was selected as a vibration isolator. Rubber spring was inserted between engine and walking tractor frame or it acted as engine base. It was found that nns acceleration was reduced due to rubber spring isolator. Spring constant of rubber spring was varied to investigate the effect of isolator elastic property on isolation effect. It showed that in operating speed range, lowering spring constant give higher isolation effect. Rms acceleration at the tip of handle was reduced with decrease of isolator spring constant. With vibration isolator, the vibration level in plowing condition on wet soil surface became less than 2.5-hour fatigue-decreased proficiency limit |
| Year | 2000 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AE-00-02 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Salokhe, Vilas M.; |
| Examination Committee(s) | Singh, Gajendra.;Chaiyaphol Kaewprakaisaengkul; |
| Scholarship Donor(s) | Khon Kaen University; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2000 |