1. PAN Hong-Bang: An Expert-PID Controller of the Electro-Hydraulic Servo System. In: Techniques of Automation & Applications, Vol. 27, No. 9, pp. 29–32, (2008)
2. Hogan, P. and Burrows C.S: Synchronizing Unevenly-Loaded Hydraulic Cylinders. In: Fluidal Power System and Technology[C]. Proceedings of the ASME International Mechanical Engineering Congress and Exposition Chicago II, Vol. 11, pp. 75–81, (1994)
3. WEI Honk-yun: Application of PID Expert Controller in Temperature Control System. In: O.I Automation, Vol. 23, No. 4, pp. 50–51, (2003)
4. Yuan Zhao-hui: The Applicant Research of Electro-hydraulic Servo System Based on RBF Neural Networks. In: Mechanical & Electrical Integration, Vol. 8, pp. 65–69, (2008)
5. Tang CC and Ho WK: Comparison of Two Design Methods for PID Controllers. In: ISA TRANS, Vol. 2, pp.28–33, (2004)