Hardware in the loop of position tracking control of hydraulic servo mechanism

This paper presents the hardware in the loop of control the position of electro hydraulic servo system based on Data Acquisition Card (NI-6014) and hybrid Model Predictive Controller (MPC). The realization of hybrid MPC depends on using Data Card and Matlab/ Simulink as the core of the control system. In addition, this paper discusses the using of Cuckoo Search Algorithm (CSA) for optimal tuning of the traditional controller parameters as a part of hybrid MPC controller. The experimental implementation of the studied system has been investigated using REXROTH components. The Electro Hydraulic Servo System mechanism (EHSS) plays an important role in industrial applications, especially in flight simulators, aircraft landing gear system, material testing machine and hydraulic press machines. The key reason of applying hydraulic systems on these applications is that it can give a high torque and high force. The theoretical and experimental results demonstrate that the values of performance criteria (settling, rise times and system overshoots) are the minimum in case of realization hybrid MPC position control over using traditional and MPC controllers. It also introduced that the integral time absolute error for various types of test signals (Multistep, sinusoidal and square signals) are a minimum values in case of using the proposed strategy in compared with the traditional and MPC controllers. In addition, hybrid MPC achieved the required physical limits of the actuator. As a general conclusion, one can conclude that the hybrid model predictive control has the priority of applying it in the field of electro hydraulic servo system due to the mentioned advantages.