operation upon receiving a command that designates a desired magnitude of electric current to be applied to the electrohydraulic valve that command is modified based on the characterization value to compensate for the magnetic hysteresis the modified command then is employed to apply electric current to the electrohydraulic valve application_number US 42639706 A description with initial reference to fig1 a machine such as an agricultural or construction vehicle has mechanical members that are operated by a hydraulic system the hydraulic system 10 includes a variable displacement pump 12 that is driven by a motor or engine not shown to draw hydraulic fluid from a tank 15 and furnish the hydraulic fluid under pressure into a supply line 14 the supply line 14 is connected to a valve assembly 20 comprising four electrohydraulic proportional ehp valves 21 22 23 and 24 that control the flow of hydraulic fluid to and from a hydraulic actuator such as cylinder 28 in response to electrical signals from a system controller 16 the first ehp valve 21 governs the flow of fluid from the supply line 14 to a first conduit 34 connected to the head chamber 26 of the cylinder 28 the second ehp valve 22 selectively couples the supply line 14 to a second conduit 32 which leads to the rod chamber 25 of the cylinder 28 the third ehp valve 23 is connected between the first conduit 34 and a return line 30 to the system tank 15 the fourth.