1. K. Åström, T. Hägglund. PID Controllers: Theory, Design, and Tuning. 2nd ed. by the Research Triangle Park: Instrument Society of America, 1995.
2. D. Xue, Y. Chen, D. P. Atherton. Linear Feedback Control. Philadelphia: Society for Industrial and Applied Mathematics (SIAM), 2007.
3. X. Shao, D. Sun, J. K. Mills. A new motion control hardware architecture with FPGA based IC-design for robotic manipulators. IEEE International Conference on Robotics and Automation (ICRA). New York: IEEE, 2006: 3520–3525.
4. J. S. Kim, H. W. Jeon, S. Jeung. Hardware implementation of nonlinear PID controller with FPGA based on floating point operation for 6-DOF manipulator robot arm. International Conference on Control, Automation and Systems ( ICCAS). Piscataway: IEEE, 2007: 1066–1071.
5. L. Qu, Y. Huang, L. Ling. Design and implementation of intelligent PID controller based on FPGA. Proceedings of the 4th International Conference on Natural Computation (ICNC). Piscataway: IEEE, 2008: 511–515.