Abstract
While the vehicle equipped with the boom sprayer is operated in the agricultural field, the boom may oscillate due to its flexibility. Although active vibration control by using joint actuators is a method to reduce the vibration, reaction torque may affect attitude of the vehicle. So the objective of this research is to design a control system to suppress the vibration of the boom and keep attitude of the vehicle stable simultaneously. In this paper, flexible booms are modeled as rigid arms and torsional springs connected with the vehicle at joints. In formulation of dynamic model, motion and vibration of the system are limited to 2-dimensional ones. Dynamic properties of ground and wheels of vehicle is considered in lateral and longitudinal directions. Equations of motion of the system are derived by using Lagrange's equation. Optimal type-1 digital servo system is employed to achieve the vibration and stability control of the system. The same dynamic model is configured on numerical simulation software. After examining validity of the simulation model on the software, the performance of the control system is evaluated by using the model on the software. The simulation is performed on various conditions and weighting matrices that characterize the controller.
