| Version 1.4 (R2008b) SimHydraulics® Software Release Notes | |
This table summarizes what's new in Version 1.4 (R2008b):
| New Features and Changes | Version Compatibility Considerations | Fixed Bugs and Known Problems | Related Documentation at Web Site |
|---|---|---|---|
| Yes Details below | No | Bug
Reports Includes fixes | Printable Release Notes: PDF Current product documentation |
New features and changes introduced in this version are
Using explicit solvers has been implemented for models that include Simscape™ and SimHydraulics® blocks. For more information, see Working with Solvers in the Simscape documentation.
The Variable-Displacement Hydraulic Machine block, able to work as a pump or a motor, enables modeling variable-efficiency machines based on manufacturer's data sheets. The machine displacement is controlled by the signal provided through the physical signal port C. The machine efficiency is simulated by implementing regime-dependable leakage and friction torque based on the experimentally established correlations between the machine efficiencies and pressure, angular velocity, and displacement.
The 4-Way Directional Valve block dialog box has been reorganized using tabs to improve usability. Use the Initial openings tab to set all the initial orifice openings. The Basic parameters tab contains the model parameterization options and the corresponding parameters. The parameters themselves have not changed.
The following demos have been added in Version 1.4:
Demo Name | Description |
Hydraulic Drill-Ream Actuator | The actuator is intended to drive a machine tool working unit performing a sequence of three technological operations: coarse drilling, fine drilling, and reaming. The actuator speed is controlled by one of three pressure-compensated flow control valves metering out return flow from the cylinder. The selection of an appropriate flow control is performed by directional valves that are activated by a control unit. |
Front-Loader Actuation System | The model shows a simplified version of an actuation system consisting of the lift and tilt cylinders. Each of the cylinders is controlled by an open center, 5-way, 3-position directional valve. The valves are connected in series through their unloading branch in such a way that the system pump is unloaded when both command levers are in neutral position. If either tilt or lift command is applied, the unloading path is closed. |
Pipeline System with Centrifugal
Pump | The demo represents a typical pipeline system with the centrifugal pump. The system is built of three manifolds connected with hoses. The combination of valves installed inside manifolds allows flow rate to be directed through different branches. The manifold models account for local resistances, elbows, and cylindrical channels. |
Also, the Variable Volume Chamber Test Rig (sh_variable_chamber_test_rig) demo has been renamed to Variable Volume Piston Chamber Test Rig, and all the Variable Volume Chamber blocks in it have been replaced with Piston Chamber blocks.
| SimHydraulics Release Notes | Version 1.3 (R2008a) SimHydraulics Software | |
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