Nonlinear output-transition control for nonminimum-phase systems: The VTOL example

• Main Author: Arom Boekfah
• Other Authors: Mahidol University
• Format: Conference or Workshop Item
• Published: 2018
• Subjects: Computer Science; Engineering
• Online Access: https://repository.li.mahidol.ac.th/handle/123456789/42345

© 2017 IEEE. Achieving the optimal output-transition control for nonlinear systems remains challenging and requires complex calculation. This paper investigates the use of a polynomial-based output-transition trajectory together with three different types of inversion-based feedforward for nonminimum-phase vertical take-off and landing (VTOL) aircraft. The necessity of pre-actuation and post-actuation is examined by comparing the input and output of the VTOL system obtained from these three nonlinear output-transition control methods. Based on simulation results, pre-actuation and post-actuation can be omitted but at the expense of the input magnitude and the smoothness of the output transition. This study offers alternative nonlinear output-transition control for nonminimum-phase systems when pre-actuation and/or post-actuation are not available.