Haojie, S., Yuanxu, W., Jianbang, L., Xiaxiang, G., Jingyang, W., Hongrui, W. (2026). Cascaded PID-LQR control for trajectory tracking in a 3-DOF robotic arm system: Modeling and simulation. Journal Engineering Research. https://doi.org/10.1016/j.jer.2026.05.025