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Meter In And Meter Out Circuit Pdf

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Bath, United Kingdom. September 10—12, To decrease throttling losses in mobile hydraulic systems a number of new system architectures have been introduced in recent years. The concept of independent metering IM , developed in the seventies, shows a lot of promise [1]. By allowing the meter-in as well as meter-out edges to be controlled separately, additional operating modes are created allowing a more efficient adaptation of system pressure to load pressure [2, 3].

Despite these advantages IM circuits have yet to find their way into industrial applications. This is mainly due to the related increase in component costs and more demanding control strategies. Additionally, the effect of mode switching on actuator motion and operator comfort is still unclear and considered to be a challenge. The STEAM mobile hydraulic system currently being developed in Aachen, Germany uses a number of new features to improve total machine efficiency [4].

Among others is the use of a new independent metering circuit called single edge meter-out control. Unlike other IM configurations, only one proportional valve is used to control cylinder motion.

This paper introduces the new concept and discusses its advantages. Sign In or Create an Account. Sign In. Advanced Search. Skip Nav Destination Proceeding Navigation.

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Author Information. Milos Vukovic. Hubertus Murrenhoff. Published Online: November 20, Volume Subject Area:. You do not currently have access to this content.

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Explain with neat sketch the working of meter out hydraulic circuit...........

Objective: To become more knowledgeable with the hydraulic system. A cylinder is speed is determined by its size and the flow rate of the oil going to or out of it. A large diameter cylinder would hold more oil and take longer to complete its stroke; a smaller the cylinder would move faster. Changing the flow rate from the pump would also change the extension time of the cylinder. Metering out has the advantage of maintaining back pressure on the lower pressure side of the cylinder. This prevents sudden extension or retraction of the cylinder if the load reverses.

Lecture 24 HYDRAULIC CIRCUIT DESIGN AND ANALYSIS

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Bath, United Kingdom. September 10—12, To decrease throttling losses in mobile hydraulic systems a number of new system architectures have been introduced in recent years. The concept of independent metering IM , developed in the seventies, shows a lot of promise [1]. By allowing the meter-in as well as meter-out edges to be controlled separately, additional operating modes are created allowing a more efficient adaptation of system pressure to load pressure [2, 3].

Hydraulic Meter In: Meter-in control refers to the use of a flow control at the inlet to an actuator for used with actuators against which the load in opposition to the direction of movement. For a meter-in-circuit that uses a simple adjustable restrictor valve selection of the DCV to create extension of the actuator will cause flow to pass through the restrictor into the piston end of the actuator. The required piston pressure, Pp, will depend on the opposing force on the actuator rod.

METER IN METER OUT AND BLEED OFF HYDRAULIC CIRCUIT

Log In. RE: Meter In or Meter Out for hydraulic cylinder control Where possible you should always install a flow control valve to control the fluid leaving the cylinder. The reasons for this are E running away. Hydraulic systems generally perform better at higher pressures. There is a phase that is used in the fluid power industry. This could be deadly as in lifting equipment double acting hilo or dump bed for instance.

WP Hydraulic circuits are designed according to their task and their area of application. Designing hydraulic circuits requires knowledge of flow behaviour and pressure losses in valves and fittings, as well as characteristics of the pump. A hydraulic circuit can be compared to an electrical circuit. After filling the system once the experimental unit can be operated independently from the water supply. The flow is adjusted by valves and read off a rotameter.

Here the flow control valve is installed in the return line metering the fluid being discharged. In that way, this circuit also gives the control over the actuating speed. But this way of control offers altogether different characteristics to the circuit.

Due to the demand for energy efficiency in electro-hydraulic systems, the separate meter in and separate meter out SMISMO control system attracts vast attention. In this paper, the SMISMO control system was configured with two servo valves to control the meter in and meter out separately. By designing two of the proposed indirect adaptive robust dynamic surface controllers IARDSC for the working-side and off-side system and setting the coupled items as estimated parameters, the SMISMO control system was decoupled into two subsystems completely. Here, indirect adaptive robust control IARC was employed to address the internal parameter uncertainties and external disturbances. As thus, the proposed IARDSC could simplify the design procedure, decrease the computational cost, and achieve an improved control performance in practical use.

Post a comment. Recent Updates. We were discussing various types of hydraulics valves used in hydraulic system in our previous post e. Servo valve and proportional valve. Today we will be concentrated here with various types of flow control hydraulic circuits usually used in various hydraulic units.

Speed controller Line type with push-in fitting

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Differentiate between Hydraulic Meter in and Meter out circuits.

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Flow Control Valve (Meter-out) Circuit

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5 Comments

Г‰tienne M. 08.06.2021 at 11:52

Meter-out controls restrict fluid leaving the cylinder to retard the cylinder's movement. This type of flow-control circuit works for any type of load -- and works best.

Karla H. 09.06.2021 at 18:50

In meter-out speed control, the effective area of the flow control valve is larger than that of meter-in, and the supply Request Full-text Paper PDF Analysis of Pneumatic Cylinder Responses Driven by Meter-out Circuit.

Ilia C. 10.06.2021 at 02:15

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Etoile B. 14.06.2021 at 06:02

Among others is the use of a new independent metering circuit called single edge meter-out control. Unlike other IM configurations, only one.

Elvia A. 15.06.2021 at 16:00

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