| Version 1.3 (R2008a) SimHydraulics® Software Release Notes | |
This table summarizes what's new in Version 1.3 (R2008a):
| 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 | No |
New features and changes introduced in this version are
Finding and managing operating points by trimming has been implemented for models that include Simscape and SimHydraulics blocks. Simulink® Control Design™ product is required for using this functionality. For more information, see Trimming Simscape Models in the Simscape documentation.
Two new blocks facilitate modeling cartridge valves:
Cartridge Valve Insert block in the Directional Valves library represents an insert of a hydraulic cartridge valve consisting of a poppet interacting with the sleeve seat. The poppet position is determined by pressures at ports A, B, and X and force of the spring. This is a structural model based on a Variable Orifice block and a Hydraulic Cartridge Valve Actuator block, described below.
Hydraulic Cartridge Valve Actuator block in the Valve Actuators library represents a double-acting hydraulic valve actuator driven by three pressures. Use this block as a pilot actuator for cartridge valves, as well as pilot-operated pressure and control valves in applications where all the forces, except spring and pressure forces, and flow consumption can be neglected.
The Centrifugal Pump block represents a centrifugal pump of any type as a data-sheet-based model. Depending on data listed in the manufacturer's catalogs or data sheets for your particular pump, you can now choose one of the following model parameterization options:
By approximating polynomial — Provide values for the polynomial coefficients. These values can be determined analytically or experimentally, depending on the data available. This is the default method, equivalent to the implementation available in the previous release.
By two 1D characteristics: P-Q and N-Q — Provide tabulated data of pressure differential and brake power versus pump delivery characteristics. The pressure differential and brake power are determined by one-dimensional table lookup. You have a choice of three interpolation methods and two extrapolation methods.
By two 2D characteristics: P-Q-W and N-Q-W — Provide tabulated data of pressure differential and brake power versus pump delivery characteristics at different angular velocities. The pressure differential and brake power are determined by two-dimensional table lookup. You have a choice of three interpolation methods and two extrapolation methods.
The following predefined fluids have been added to the Hydraulic Fluid block:
ISO VG 22 (ESSO UNIVIS N 22)
ISO VG 46 (ESSO UNIVIS N 46)
Brake fluid DOT3
Brake fluid DOT4
Brake fluid DOT5
Water
See the block reference page for more information. The Examples section shows how you can get information on the fluids and their properties.
| Version 1.4 (R2008b) SimHydraulics Software | Version 1.2.1 (R2007b) SimHydraulics Software | |
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