*************************** Frequency response analysis *************************** Qualitative measure of a system or device in response to a stimulus used to characterize the dynamics of a system. Dynamic characterization of the transfer function response of the composition in frequency domain. ============== Axis positions ============== Define the position of the axis. Default is (0,0,0). ===== Loads ===== Open the load case container, where load cases can be defined (CTRL+K on load case to configure). ----------------------- Configure selected load ----------------------- Define and configure the load case here. ^^^^ Link ^^^^ Define at which link the load is applied. ^^^^^^^^^^^^ Force/Moment ^^^^^^^^^^^^ Define the direction of the force/moment. By entering 1 in a corresponding direction means that a force/moment is applied in this direction scaled by 1. ========= =================================== Direction Force/Moment ========= =================================== u Force in axial direction v Force in transversal direction w Force in normal direction ru Torque around axial direction rv Moment around transversal direction rw Moment around normal direction ========= =================================== ------------- Add link load ------------- Add a new link load which then can be configured. --------------- Add link spacer --------------- Add a displacement between the master and slave interface in the link. -------------------------- Add component acceleration -------------------------- Add a component acceleration load case. For example, an acceleration of -9,81 m/s\ :sup:`2` \ in w-direction defines the gravitational force to the selected component. ---------------------------- Add composition acceleration ---------------------------- Add a composition acceleration. The acceleration is used for the whole composition and not for a component only, as in add component acceleration. For example, an acceleration of -9,81 m/s\ :sup:`2` \ in w-direction defines the gravitational force to the composition. --------------------- Add ontroller command --------------------- Add a controller command load. Either a position or a velocity command value can be defined acting on the selected controller. ---------------- Add rail profile ---------------- Add a rail profile to a moving interface. This load adds a displacement between master and slave interface depending on the position off the carriage along the rail. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Selected component and rail interface ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Select the component and the rail where the profile should be added. ^^^^^^^^^^^^^^^^^^ Profile normal dir ^^^^^^^^^^^^^^^^^^ Define the normal direction of the rail profile. ^^^^^^^^^^^^^^ Link selection ^^^^^^^^^^^^^^ Select the link between rail and carriage to which the displacement should be added. ^^^^^^^^^^ Edit table ^^^^^^^^^^ Define rail profile using excel or the table directly. ========= =============================================================== Step Action ========= =============================================================== 1 Click on *Table* 2 Right-click into newely opened table and click on *Copy header* 3 Open Excel and paste the header in a new sheet 4 Define the time steps in the *Time* column 5 Define the values at every time step in the *Value* column 6 Copy the whole table including the header *Time* and *Value* 7 Right-click into the MORe-Table and click on *Paste* 8 Click on *Plot* to check if table was copied correctly ========= =============================================================== Additionally, the number in *Number of rows* can be changed. This allows to directly define the transient load data in the table. Important: The headers of the table imported from Excel have to match the ones given in the MORe-Table. Furthermore, tables that have more than 1000 rows can not be copied into MORe. ^^^^^^^^^^^ Import data ^^^^^^^^^^^ Import the rail profile from a .mat file. ========= =============================================================== Step Action ========= =============================================================== 1 Open matlab and define a vector of name or *var* which stores the time steps 2 Define a vector that stores the load data for every time step 3 Select both vectors and save them in a .mat file 4 Right-click on *load_case_data* and click on *Import data* 5 Select the .mat file 6 Click on *Plot* to check if table was copied correctly ========= =============================================================== Important: In the .mat file there has to be a vector called *var*, otherwise the import will not work. ---- Hint ---- By right-clicking on the number in the first column, the load can be deleted. =============== Frequency range =============== Define the frequency range for the frequency response analysis. ================ Number of points ================ The number of points defines how many steps between the minimal and maximal frequency are taken. ================= Start calculation ================= Start the calculation of the frequency response analysis.