Saeed Montazery - Department of Mechanical Engineering, Shahid Rajaee teacher training University, Tehran, Iran
Ali Rahmani Hanzaki - Department of Mechanical Engineering, Shahid Rajaee teacher training University, Tehran, Iran

In this paper, the optimal feedback gain of the controller in the time delay feedback control (TDFC) method is investigated in the presence of noise in order to minimize the control input. In last researches, the feedback gain optimality was investigated to reach optimal stability in both noisy and noiseless systems. In this research, the feedback gain optimality is investigated with approach of minimizing control effort. Then, proportional feedback control (PFC) method is proposed as an appropriate method with lower control effort in the presence of noise. Finally, a gradient- descent method is applied to obtain the optimal feedback gain in PFC method

TDFC, PFC, optimal feedback gain, control effort, gradient-descent