A new approach to the design of light manipulator arms with long links is proposed in this paper. In contrast with traditional schemes, a flexible link is provided with a special force unloading system (FUS) having electrohydraulic drives. As a result, the static and dynamic errors caused by link structural deflections are minimized. Strategy of control the unloading actuators with measuring st...

Electrohydraulic expansion joining has great potential for the light weight and high strength thin-walled pipes due to its strain rate. Based on central composite design (CCD) of response surface methodology, multiple experiments electrohydraulic process were performed. The multivariate quadratic nonlinear regression model between parameters (discharge voltage, wire length, diameter) ultimate p...

Fales, Roger, "Robust control design for an electrohydraulic wheel loader system with a human-in-the-loop assessment in a virtual environment " (2004). Retrospective Theses and Dissertations. Paper 937. The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleed-through, subs...

This paper describes the modeling, simulation, and control of an inverted, ceiling-mounted Stewart platform, designed to be a one-person motion simulator. The dynamic equations of the Stewart platform are derived using the virtual work principle. It is shown by simulations that the leg dynamics can be neglected. A model of the electrohydraulic actuator is derived and then veri ed using experime...

This paper develops repetitive and iterative learning control design and analysis for back stepping controlled nonlinear systems. To precisely track periodic or finite duration trajectories for nonlinear systems, back stepping control is first designed to render closed loop stability and, in theory, asymptotic tracking performance. However, due to the sensitivity to the unmodelled dynamics plan...

This paper addresses the control problem of an electrohydraulic velocity servo-system (EHVSS). Two control schemes are proposed for the stabilization of the system. The first scheme is a dynamic sliding mode controller (SMC), and the second scheme is a linear quadratic regulator-like control law which is based on the state-dependent Riccati equation (SDRE) approach. When applying the SMC techni...

In this paper, a complete model of an electro hydraulic driven dry clutch along with its performance evaluation has elucidated. Through precision modeling, a complete nonlinear physical and full order sketch of clutch has drawn. Ultimate nonlinearities existent in the system prohibits it from being controlled by conventional linear control algorithms and to compensate the behavior of the sy...

This paper focuses on the position tracking control issue of electrohydraulic systems (EHS). The dynamical model EHS is introduced in first place, based which a type Variable Structure Disturbance Observer (VSDO) constructed for to estimate parametric uncertainty possesses. Then, backstepping controller designed under VSDO realize high precision purpose. To avoid phenomenon differential explosi...

The main purpose of this article is to present the design, optimal setting and experimental study a multivariable PID controller supposed for electrohydraulic power steering system with load-sensing function. set performed through an optimization procedure based on genetic algorithm. embedded into microcontroller mobile machinery used in laboratory test rig investigation servo system. Results o...