The process of
building the simulation for a machine tool
application can be similarly applied to a power train drive system for a
passenger electric vehicle. Here the design can start with a 3-phase AC
induction motor model that provides the necessary horsepower and speed to
drive the vehicle. Based on the vehicle mass and wheel size, a rotational load
model can be configured. Losses due to wheel bearing friction can also be
included as a combination of stiction, Coulomb, and viscous friction within the
Rotational Load parameters.
Using the wheel size, output angular velocity for this model can be converted to
vehicle linear speed.
Additional static blocks can be configured to
model drag forces on the vehicle that can be fed back into the load disturbance
of the Rotational Load block.
Selecting a linkage ratio of 1, and using additional blocks to connect between
the motor and load displacement connections can simulate a clutch and automatic
transmission. Gravity induced loading can be simulated as a function of road
angle and superimposed with other load disturbance inputs. The purpose of such a
simulation could possibly focus on optimization of motor parameters or the
development of a new method for automatic gear shifting.
•The process of building the simulation for a tracking system can similarly be applied to a tape drive speed and tension control system. Here the design could start with a permanent magnet DC synchronous motor model providing necessary torque to rapidly accelerate a tape spindle to a desired speed. A model could be developed that provides simulated track positioning information for indexing tape position and controlling start and stop profiling.