Ibrahim Najm, Mustafa, Alaa Dahham Younis, and Firas Ahmed Majeed. “Mathematical Modelling and PID Controller Implementation to Control Linear and Nonlinear Quarter Car Active Suspension”. Al-Rafidain Engineering Journal (AREJ) 28, no. 2 (September 1, 2023): 113–121. Accessed August 7, 2025. https://ojs.uomosul.edu.iq/index.php/arej/article/view/26714.