Research of the Influence of Road Excitation on Human Body Comfort under the Harvester Working Condition

When the harvester travels in the field, road excitation will cause low-frequency vibration within 3 Hz, which is the most sensitive frequency range of human body. In order to evaluate the influence of road excitation on the comfort feelings of the harvester driver, vibration acceleration data were collected when the combine harvester was travelling at high and low speeds on flat-soft road, flat-solid road, and rough-solid road. The vibration comfort of the harvester was evaluated by root mean square (RMS) of weighted acceleration. The results showed that the speed of harvester, road surface roughness and hardness have great effects on harvester vibration comfort. Soft road has an obvious absorption effect on the vibration at 70 Hz. The increase in the speed of harvester and road surface hardness and roughness elevates the subjective discomfort of the driver.