Design of Fractional–PID Controller Based on Grey Wolf Optimization for Robotic Manipulator. Tikrit Journal of Engineering Sciences, [S. l.], v. 32, n. 3, p. 1–8, 2025. DOI: 10.25130/tjes.32.3.9. Disponível em: https://www.tj-es.com/ojs/index.php/tjes/article/view/1963.. Acesso em: 9 sep. 2026.