PropValve33LSTableAx
Library
HydraulicsByFluidon/Components/Valves/DirectionalValves/LSDirectionalValves
Description
The component PropValve33LSTableAx is a model of a 3-way proportional valve where the stroke follows the input signal with a 2nd order delay. In addition to PropValve33PT2TableAx, it has a fourth port (LS) connected to port A or port T, depending on the stroke.
The parameterization of the valve is done by providing the Flow coefficient alphaD and a look-up table of the Cross-sectional area as a function of the input signal. Each of the two meetering edges is parameterised with a separate look-up table and a Flow coefficient alphaD given by the user. Further information regarding the formatting of the look-up table can be found in the documentation of the component ResistorTableAx. Unlike the Resistor component, the look-up table for valve edges is declared for the input range from -1 to 1.
For a positive and negative stroke, the cross-sectional area of the valve's meetering edge is given as a function of the input signal through a look-up table starting from 0 to maximum area (the cross-sectional area of the valve edge when it is completely open). The cross-sectional area must be given in m^2. The flow is then calculated based on Flow coefficient alphaD, Cross-sectional area, density of the fluid and pressure difference between the two edges of the valve, according to the formula given below:
The valve stroke can be shifted by Relative overlap general. In accordance with common valve parameters a negative overlap will open the valve edge. Relative overlap general is applied to all valve edges simultaneously. If at least one of the edge-specific values, e. g. Relative overlap PA or -AT is set to a value different from 0, then the Relative overlap general is ignored and the individual overlaps are used.
Port LS is connected to port A if Stroke > Relative stroke at which the LS port is switched, else port LS is connected to port T. Pressure at port LS follows pressure at A or T with first order delay with Time constant of LS signal.
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_inputMax | inputMax | Input value for 100 % open | Scalar | |
mo_angFreq | angFreq | Angular frequency | Scalar | |
mo_damping | damping | Damping | Scalar | |
mo_vMax | vMax | max. Velocity | Scalar | |
mo_vMin | vMin | min. Velocity | Scalar | |
mo_enableStrokeOut | enableStrokeOut | Enable Stroke Output | Number | 0 |
mo_inputMaxPartial | inputMaxPartial | Scalar | ||
mo_forwardFluidPropertiesBT | forwardFluidPropertiesBT | Scalar | true | |
mo_eps | eps | Scalar | ||
mo_deadVolume | deadVolume | Dead volume at ports | Scalar | |
mo_initType | initType | Type of initialization (1: no init, 2: steady state, 3/4: initial output) | Structure | |
mo_initType/choice1 | No initialization (start values are used as guess values with fixed=false) | Number | 0 | |
mo_initType/choice2 | Steady state initialization (derivatives of states are zero) | Number | 0 | |
mo_initType/choice3 | Initialization with initial states | Number | 0 | |
mo_initType/choice4 | Initialization with initial outputs (and steady state of the states if possible) | Number | 0 |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_Overlap | Overlap | Valve edge general relative overlap | Scalar | |
mo_OverlapPA | OverlapPA | Valve edge PA relative overlap | Scalar | |
mo_OverlapAT | OverlapAT | Valve edge AT relative overlap | Scalar | |
mo_timeConstLS | timeConstLS | Time constant of LS signal | Scalar | |
mo_switchBand | switchBand | Relative stroke at which the LS port is switched | Scalar |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_alphaDPA | alphaDPA | Flow coefficient alphaD | Scalar | |
mo_tableFromFilePA | tableFromFilePA | Table is provided by file | Scalar | true |
mo_fileNamePA | fileNamePA | File where look-up table is stored | String | |
mo_tableNamePA | tableNamePA | Table name on file | String | |
mo_manualTablePA | manualTablePA | Manually provided look-up table | Matrix |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_alphaDAT | alphaDAT | Flow coefficient alphaD | Scalar | |
mo_tableFromFileAT | tableFromFileAT | Table is provided by file | Scalar | true |
mo_fileNameAT | fileNameAT | File where look-up table is stored | String | |
mo_tableNameAT | tableNameAT | Table name on file | String | |
mo_manualTableAT | manualTableAT | Manually provided look-up table | Matrix |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_valveStrokeOut | valveStrokeOut | valveStrokeOut | Structure | |
mo_valveStrokeOut/fixed | fixed | Cell of scalars | true | |
mo_valveStrokeOut/start | start | Cell of scalars | ||
mo_pP | pP | pP | Structure | |
mo_pP/fixed | fixed | Cell of scalars | true | |
mo_pP/start | start | Cell of scalars | ||
mo_pT | pT | pT | Structure | |
mo_pT/fixed | fixed | Cell of scalars | true | |
mo_pT/start | start | Cell of scalars | ||
mo_pA | pA | pA | Structure | |
mo_pA/fixed | fixed | Cell of scalars | true | |
mo_pA/start | start | Cell of scalars | ||
mo_Input | Input | Input | Structure | |
mo_Input/fixed | fixed | Cell of scalars | true | |
mo_Input/start | start | Cell of scalars | ||
mo_Stroke | Stroke | Stroke | Structure | |
mo_Stroke/fixed | fixed | Cell of scalars | true | |
mo_Stroke/start | start | Cell of scalars | ||
mo_Velocity | Velocity | Velocity | Structure | |
mo_Velocity/fixed | fixed | Cell of scalars | true | |
mo_Velocity/start | start | Cell of scalars |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
portLS | implicit | Hydraulic port LS | input | 1 |
portP | implicit | Hydraulic port P | input | 2 |
portT | implicit | Hydraulic port T | input | 3 |
portA | implicit | Hydraulic port A | input | 4 |
Input | implicit | Set value of valve position | input | 5 |
Port 6 | implicit | Valve Stroke | output | mo_enableStrokeOut |