Sustainable Agriculture: Stable Robust Control in Presence of Uncertainties for Multi-Functional Indoor Transportation of Farm Products

• Main Authors: Ha Quang Thinh Ngo, Van Ngoc Son Huynh, Thanh Phuong Nguyen, Hung Nguyen
• Format: Article
• Language: English
• Published: MDPI AG 2020-11-01
• Series: Agriculture
• Subjects: agricultural applications; multi-functional platform; nonlinear control; motion control
• Online Access: https://www.mdpi.com/2077-0472/10/11/523

Currently, integrated trends play a key role in every aspect of automation applications. In particular, if the mechanization of agriculture becomes a competitive factor among farmers or nations, then the multi-functional transportation of agricultural products is inevitable in global trade. In sustainable transportation, the challenge of overcoming stable control in harsh environments, such as through imprecise parameters or varying loads, should be addressed. In this paper, a novel controller for a nonholonomic mechanical system able to adapt to uncertainties is proposed. Based on the multi-functional autonomous carrier (MAC), the system configuration of the kinematic and dynamic model is launched in order to identify the unstable problems that arise when tracking the trajectory. To solve these troubles, the decoupled formation of a MAC system has been investigated by considering two second-order components, namely a linear speed-based sub-system and angular speed-based sub-system. To stabilize the whole system using the Lyapunov theory, the advanced control techniques are studied. To validate the proposed approach, a series of test scenarios have been carried out. From the superior performance of numerous trials, it is clear that our approach is effective, feasible, and reasonable for the advanced control of agricultural applications.