In this paper, we present a backstepping based fuzzy logic (FL) scheme for the active control of vehicle suspension systems using the two-degrees of freedom or 1/4 car model. The full dynamics of a novel hydraulic strut are considered. The servo-valve dynamics are also included. A fuzzy logic system is used to estimate the nonlinear hydraulic strut dynamics. The backstepping fuzzy logic scheme ...

One of the most promising novel evolutionary algorithms is the Differential Evolution (DE) algorithm for solving global optimization problems with continuous parameters. In this article the Differential Evolution algorithm is proposed for handling nonlinear constraint functions to find the best initial weights of neural networks. The highly non-linear behaviour of servo-hydraulic systems makes ...

MF Rahmat, S Md Rozali, N Abdul Wahab and Zulfatman Faculty of Electrical Engineering, Universiti Teknologi Malaysia, UTM Skudai 81310, Johor,Malaysia; E-mail : [email protected],[email protected], [email protected] Faculty of Electrical Engineering, Universiti Technical Malaysia Melaka, 76109 Durian Tunggal, Melaka,Malaysia; E-mail : [email protected] Abstract Draw-wire sensor is classified a...

The objective of the paper is to develop a novel intelligent pitch control system of a 2MW wind turbine driven by variable-speed hydraulic pump-controlled system. For realizing the intelligent pitch controller, self-organizing fuzzy sliding mode control, which combines fuzzy sliding mode control and self-organizing modifier, is proposed. In order to verify the proposed concept experimentally, a...

Despite the application of advanced control technique to improve the performance of electro-hydraulic position control, Proportional Integral Derivative (PID) control scheme seems able to produce satisfactory result. PID is preferable in industrial applications because it is simple and robust. The main problem in its application is to tune the parameters to its optimum values. This study will l...

The hydraulic human power amplifier is a tool that uses hydraulic actuation to amplify the force that the human exerts on it. Our control objective and framework are to make the system behave like a passive mechanical tool when interacting with the human and with the work environment with a specified power scaling factor. A virtual velocity coordination control approach casts the human power am...

This study investigates the complex load-bearing mechanism of reinforced concrete tower large wind turbines through a structural model test. MTS electro-hydraulic servo loading system was used to load two models for push-out The ultimate bearing capacity found be 8.894 kN. test findings revealed that top is subjected unilateral shear as horizontal increases. As result, strain in compression zon...

PID control algorithm is widely used in servo control system. Because of the non-symmetrical structure of the hydraulic cylinders in the angle position electric-hydraulic servo system of plant converter, the conventional PID control has low control precision and bad flexibility. To solve the problem, an improved digital PID control algorithm with variable sampling periods is proposed. Based on ...