On the basis of analysis of the theory of mechanical-hydraulic power match system,an electro-hydraulic proportional power match system which was suitable for matching TLC900 transporting girder vehicle of the engine was developed according to the driving force-speed curve and parameter,and the control rule and program flow chart about the system were also given.

Since importance of research on wind turbine pitch-controlled technology, the scheme of semi-physical simulation test-bed for wind turbine electro-hydraulic proportional pitch-controlled system was formed.

Introduces a design of electro-hydraulic proportional system of MSC-II experimental platform.

Steer-by-wire system integrated electro-hydraulic proportion control technology,computer technology and automatic control technology etc.

The model of hydraulic cylinder controlled by electro-hydraulic proportion valve was set up after analyzing electro-hydraulic proportion servo control system,and a digital emendation for the system controlled by single chip computer for the construction vehicle special vehicle rescue manipulator was designed.

The electro-hydraulic proportional load-sensitive variable displacement pump control the flow and pressure,and make them accommodate with load automationly.

Model 6BFK12/24 electrohydraulic proportional controller is a new type control unit which can supply electrohydraulic proportional multiple valve with eight proportional signals and four on-off signals.

Since the importance of research on wind turbine power control technology,the electrohydraulic proportional pitch-controlled actuator was designed and combined with BLADED software to set up the semi-physical simulation test- bed.

This theme firstly introduces the development 、 the feature and the component of electrohydraulic proportional control system, then starts to research secondly the pump-controled motor system on the basis of the electrohydraulic proportional pressure and discharge test-bed .

The virtual design of electro-hydraulic proportion control amplifier;

The mathematical models of the proportional solenoids coil current are provided and the control method for electro-hydraulic proportion controller is analyzed on this basis.

The electro-hydraulic proportion valve is used in the new hoist to regulate the rotational speed of the roller whose radius is changing during well logging,and the line speed is also changing continuously.