The Control on Servo Electro-hydraulic System of Double Shank Vibrating Subsoiler by using a Fuzzy - based Frequency Control

Abstract

The aim of this study was to design the servo electro-hydraulic system for double shank vibrating subsoiler by using a Fuzzy - based frequency control as compared to proportional–integral–derivative (PID) frequency control. The steady vibration of subsoiler was controlled to enhance the subsoiler’s performance and convenient to change the frequency level. After inputting a preferred frequency through the controller, a
proportional valve was opened to control a flow rate of hydraulic oil into the hydraulic motor which connected to the vibration system. This process was measured by sensors, transducers and feedback signal processing devices. The experiments were conducted in sandy clay loam soil of 20.60% (db) moisture content, 1.66 g/cm3 dry bulk density and 2.58 MPa cone penetration resistance at a forward speeds of 2.09 km/h, a tillage depths of 30 cm, a constant oscillatory amplitude of 36.5 mm and three oscillatory frequencies
(7, 9 and 11 Hz). The experimental results showed that both controllers efficiently controlled the stable oscillatory frequency for a tillage. However, the fuzzy-based control performed better response than the PID
controller. Fuzzy-based controller had higher speed and more accuracy than PID controller which had high overshoot.