Meter in and meter out circuit pdf
File Name: meter in and meter out circuit .zip
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- Speed controller Line type with push-in fitting
- Lecture 24 HYDRAULIC CIRCUIT DESIGN AND ANALYSIS
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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.
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 . 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.
Speed controller Line type with push-in fitting
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.
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. With a fixed displacement pump delivering a constant flow, excess flow from the pump will be returned to tank by the relief valve at its set pressure. Consequently, the available pressure drop, PSmax-Pp will determine the flow delivered to the actuator for a given restrictor opening. With this system the flow, and hence the actuator velocity, will vary with the load force.
Lecture 24 HYDRAULIC CIRCUIT DESIGN AND ANALYSIS
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.
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. Now, the circuit pressure has to overcome the load resistance and the pressure drop across the flow control valve. However, as the flow control valve is on the right side of the piston, the differential area will cause rise in the pressure.
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