Control of hydraulic rotary multi-motor systems based on bilinearization

SCADA System for Controlling the Coilers from a Metal Extrusion Press

“…So very high forces, arround 2500 tons-force, are necessary. But, as is very well known, the controling of hydraulic units is difficult even in the case of machines where the forces are not so big [1]. In our case, more of that, 2 independent hydraulic units must to be controlled in order to obtain a sincronicity of movements.…”

Nonlinear system identification—Application for industrial hydro-static drive-line

“…It was shown in Guo et al (1994) that the general structure of such hydraulic systems is that of a bilinear model (20) …”

“…Being able to change the vehicle speed without shifting gears or varying engine-speed is the main attractive feature of the HST for the industry. Multimotor hydro-static drive-lines (Guo, Schöne, & Ding, 1994) are one particular type of hydraulic systems, which find application mostly in heavy off-road machines like tractors, harvesters, forklifts. While the use of hydro-static energy transducers has been possible for a long time on these systems, improving the energy characteristics of such machines requires detailed models and correspondingly sophisticated control methods, which need to be developed (Rahmfeld & Skirde, 2010;Shaoyan, Fei, Bin, Jiangang, & Yao, 2011).…”

G-load tracking control of a centrifuge driven by servo hydraulic systems

“…The PDT 1 controller is also used to control the pressure of the network and the pressure of the network to be controlled is nearly constant. Guo et al [6] derived the multiple-input multipleoutput (MIMO) bilinear model and proposed the control concept consisting of a proportional integral (PI)type model following the controller and a bilinear disturbance observer for the secondary controlled hydraulic system. Kim and Lee [7] incorporated a load torque observer with PI cascade control structure and achieve robust speed control of a VDHM.…”