TY JOUR TI INTELLIGENT CONTROL METHODS FOR ROBOT MANIPULATOR TRAJECTORY PLANNING WITH SINGULARITY AVOIDANCE KW manipulator KW singularity avoidance KW trajectory optimization KW intelligent control KW PID control KW fuzzy logic control KW hybrid FLC-PID JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Alwardat, M.. AU Alwan, H.M. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov