International Journal of Electronics and Communication Engineering. ISSN 0974-2166 Volume 5, Number 3 (2012), pp. 363-370 © International Research Publication House http://www.irphouse.com Design of Quadratic Dynamic Matrix Control for Driven Pendulum System S. Srinivasulu Raju*, T.S. Darshan** and B. Nagendra*** E-mail id: srinu85raju@gmail.com*, tsnagadarshan@gmail.com**,bnagendra44@gmail.com*** Abstract This paper proposes a Quadratic Dynamic Matrix Control (QDMC) method to control a driven pendulum system. Driven pendulum is a suspended pendulum, which has a motorized propeller at the end of the stick, so it can be controlled by controlling the voltage given to DC motor. Dynamic Matrix Control (DMC) was the first Model Predictive Control (MPC) algorithm introduced in early 1980s. These are proven methods that give good performance and are able to operate for long periods without almost any significant intervention. Today, DMC is available in almost all commercial industrial distributed control systems and process simulation software packages. The simulation results have proven that this method enhances the stability as well as ease of tuning. Keywords: QDMC; Driven pendulum; step response; model length; control horizon; prediction horizon; MATLAB Introduction A simple pendulum system is a mechanical system that exhibits periodic motion. It consists of particle like bob of mass suspended by a light string of length that is fixed at the upper [1]. A Compound Pendulum is a standard topic in most physics courses because it includes some physical subjects such as the simple harmonic motion, the period of oscillation, the acceleration of gravity, the center of mass, the moment of the inertia, momentum, etc. [2]. Literature Works [3]-[5] adopted types of compound Pendulum. This type of pendulum described in this paper has a motorized propeller at the end of the pendulum so it can lift the pendulum after given voltage. This concept of pendulum system is useful and can be applied in real life. This system has many applications such as measurement, scholar tuning, coupled pendulum, entertainment etc., Kizmaz [6] proposed a sliding mode control for this system and the presented