The study researched the orifice flow equation when state of is laminar. Based on novel and expected linear equation, a compensator designed to compensate non-linearity make characteristics linear. characteris-tics experiment result shows that after compensa-tion control close flow, in which pres-sure difference was increased from 0.5MPa 4MPa, error less than 20%. When used as feed forward EHSS...

1 Abstract—Utilizing model reference adaptive control approach and multiple Lyapunov functions method, we propose a switched adaptive controller for uncertain switched linear systems in control canonical form. These systems exist naturally in many practical applications, such as variable capacity hydraulic pump involving discrete changes that are specified by the valve position. We show that th...

The presented work was directed to develop the dynamic performance of an electro-hydraulic proportional system (EHPS). A mathematical model EHPS is using electro- hydraulic valve (EHPV) by Matlab-Simulink, which facilitates simulation behavior inside main control unit. Experimental done and closed loop designed linear variable displacement transducer sensor (LVDT). controller Arduino uno, consi...

An electrical hydraulic control system (electro-hydraulic system) is thought to be a key component in excavator operation systems. Control methods with fixed parameters may not yield optimal performances because has various nonlinear uncertainties due the leakage and compressibility of fluid medium. Hence, novel PID controller based on improved differential evolution (IDE) introduced electro-hy...