Isothermal Liquid
R2026bIsothermal liquid networks do not undergo temperature or viscosity changes due to any processes occurring in or around the network, but can model elevated or reduced temperatures. The fluid properties are a function of pressure. The available blocks include actuator and actuator forces, flow resistances, pumps and pump components with optional pre-parameterization, and a variety of valves with opening and closing dynamics.
If a specific component does not yet exist in a domain library, you can build your own using the Simscape™ language. For more information, see Creating Custom Components.
Categories
- Actuators
Linear and rotary actuators for one- and two-way motion control
- Pipes and Fittings
Components for pipe flows and hydraulic losses
- Pumps and Motors
Fixed- and variable-displacement devices for mechanical-hydraulic energy conversion
- Tanks and Accumulators
Chambers with variable fluid volumes
- Utilities
Isothermal system properties
- Valves and Orifices
Variable-area components for fluid flow control
Related Information
Featured Examples
Hydraulic Axial-Piston Pump with Load-Sensing and Pressure-Limiting Control
A test rig designed to investigate the interaction between an axial-piston pump and a typical control unit simultaneously performing the load-sensing and pressure-limiting functions. To increase the fidelity of the simulation, this example uses a detailed model of the pump that accounts for the interaction between the pistons, swash plate, and valve plate.
Hydraulic Actuator with Dual Counterbalance Valves
An actuator controlled by a 4-way directional valve and loaded with an overriding load, requiring the use of counterbalance valves to prevent the load from creeping when the directional valve is in the neutral position. In the neutral position, the directional valve connects ports A and B to the reservoir while blocking the pressure port P. The counterbalance valves block flow from returning to the reservoir, thus holding the actuator in place.
Front-Loader Actuation System
A simple actuation system that has a lift and tilt cylinder. Each cylinder is controlled by an open center, 6-way, 3-position directional valve. The valves are connected in series through their unloading branch such that the system pump unloads when both spool displacements are in neutral position. If either tilt or lift command applies, the unloading path closes.
Washing Machine Fault Analysis
Model a washing machine and introduce a fault in its operation. The machine water supply faults at a specific time and this example models the system response under this scenario. The electric motor switches off and the machine operation is aborted by discharging the partially filled outer drum.
Cylinder Design Parameter Estimation
Parameterize and test a tandem primary cylinder starting from a manufacturer datasheet. This example uses optimization to determine remaining unknown parameters, given the numerical data extracted from the datasheet. After the model is simulated, it compares the resulting push rod force - brake pressure relationship curve to the curve provided on the manufacturer datasheet. Understanding the behavior of the tandem primary cylinder is important when selecting other braking system components.
Tractor Transmission Energy Flow Chart
Model, parameterize, and test a tractor with a hydrostatic continuously variable transmission (CVT). When you run one of the plot functions, you can view plots of the tractor velocity, engine speed, transmission speed, and pump and motor energy computations.
