Chia, Siew Lang (2020) Design and development of ultrasonic actuating mechanism for harvesting and pruning operations in oil palm plantation. [Project Paper] (Submitted)
![[img]](http://psaspb.upm.edu.my/style/images/fileicons/text.png) |
Text
lp FK 2020 5.pdf Download (2MB) |
Abstract
This project carried out the design and development of ultrasonic actuating mechanism for oil palm trimmer. The focus of this project was selecting the suitable horn design and determining the frequency required for frond trimming. Performance of a horn depends on its physical properties of material and its geometry. Three horns: Stepped horn, Exponential horn, and Catenoidal horn were fabricated for testing. Calculation analysis of the horns was used to determine the performance of each horn. The amplification factor of stepped horn, exponential horn and catenoidal horn was 2, 1.202 and 1.513 respectively. Horn tuning shows that the difference of natural frequency between the horn and transducer was 2.59 (stepped horn), 1.95 (exponential horn) and 1.54 (catenoidal horn). The most suitable horn for amplitude amplification was catenoidal horn due to its combination of good amplifying and stress distribution characteristics. Moreover, horn tuning of catenoidal horn shows that it has nearest resonant frequency to the actuator which indicates that it has the best vibration transmission performance among three horns. The frequency and amplitude of vibration were calculated from the maximum cutting force required for oil palm frond cutting. The result shows that the frequency was inversely proportional to vibration amplitude and the cutting force requirement was inversely proportional to the frequency.
| Item Type: | Project Paper |
|---|---|
| Faculty: | Faculty of Engineering |
| Depositing User: | Ms Siti Mariam Giman |
| Date Deposited: | 21 Nov 2022 07:43 |
| Last Modified: | 21 Nov 2022 07:43 |
| URI: | http://psaspb.upm.edu.my/id/eprint/595 |
Actions (login required)
 |
View Item |