The performance of longitudinally vibrating earth cutters

Optimising oscillation frequency in oscillatory tillage

“…Trap et al (1974) showed the most important parameter controlling the performance of oscillatory tillage is the velocity ratio. As the velocity ratio increased to more than one, the draft force decreased.…”

The effect of oscillation angle on the performance of oscillatory tillage

“…Based on past research Trap et al (1974) at a velocity ratio of more than 1 the tine goes through three phases of cutting (cutting uncut soil), backing off (going back through loosened soil) and catching up (going forward through loosened soil until reach uncut soil and starts cutting). The following theory was used to calculate the time of three conventional phases during a cycle.…”

“…A study by Trap et al (1974) showed that when the velocity ratio was less than 1, the cutting blade always moves forward relative to the soil. Increasing the velocity ratio to 1 means the Oscillatory tillage Oscillation angle Subsoil loosening Oscillating tine Implement draft A B S T R A C T In established Australian vineyards compacted soil either created naturally or by trafficking prevents root growth to desirable depths and restricts root systems from getting water and nutrients.…”

“…Gunn and Tramontini (1955) theoretically analysed that with a velocity ratio of more than 1, a tool does not do any work during the backing-off phase due to moving through loosened soil, but their experimental results showed this assumption was not correct. Trap et al (1974) found that the friction acting between the cutting blade and soil when not cutting into firm soil is very important.…”

Design and development of vibratory cultivator using optimization algorithms

“…There have been several studies reported on the effect of oscillation angle, frequency, forward speed, amplitude on draft and power requirements by cutting tool and optimum setting are also proposed for efficient operation [24][25][26]. Thus the application of vibration in tillage tool can provide better soil pulverization, soil crumbling efficiency, reduced draft requirements, and soil resistance.…”