@article{._Mu_Nakashima_Tanaka_2014, title={PID Controller Design of Nonlinear System using a New Modified Particle Swarm Optimization with Time-Varying Constriction Coefficient}, volume={2}, url={https://emitter.pens.ac.id/index.php/emitter/article/view/28}, DOI={10.24003/emitter.v2i2.28}, abstractNote={<p>The proportional integral derivative (PID) controllers have been widely used in most process control systems for a long time. However, it is a very important problem how to choose PID parameters, because these parameters give a great influence on the control performance. Especially, it is difficult to tune these parameters for nonlinear systems. In this paper, a new modified particle swarm optimization (PSO) is presented to search for optimal PID parameters for such system. The proposed algorithm is to modify constriction coefficient which is nonlinearly decreased time-varying for improving the final accuracy and the convergence speed of PSO. To validate the control performance of the proposed method, a typical nonlinear system control, a continuous stirred tank reactor (CSTR) process, is illustrated. The results testify that a new modified PSO algorithm can perform well in the nonlinear PID control system design in term of lesser overshoot, rise-time, settling-time, IAE and ISE.</p><p><span><strong>Keywords</strong><span>: PID controller, Particle Swarm Optimization (PSO),<span>constriction factor, nonlinear system.</span><br /></span></span></p&gt;}, number={2}, journal={EMITTER International Journal of Engineering Technology}, author={., Alrijadjis and Mu, Shenglin and Nakashima, Shota and Tanaka, Kanya}, year={2014}, month={Dec.}, pages={80-90} }