List of Articles سیستمهای چندمتغیره Open Access Article Abstract Page Full-Text 1 - Optimal PID Controller Tuning for Multivariable Aircraft Longitudinal Autopilot Based on Particle Swarm Optimization Algorithm Mostafa Lotfi Forushani Bahram Karimi Ghazanfar Shahgholian Open Access Article Abstract Page Full-Text 2 - QFT Controller Design for Uncertain Multivariable Linear Systems With Constraint on Bandwidth, With the Aid of an Internal Feedback Bahram Karimi Farid Sheykholeslam Iman Saboori