MATLAB中sim函数的用法

Starting with R2009b, the sim command was enhanced to provide greater compatibility with parallel computing. The improved single-output format saves all simulation results to a single object, simplifying the management of output variables.

For backward compatibility with R2009a or earlier releases, use the backward-compatible syntax:

[T,X,Y] = sim('model',Timespan, Options, UT)
[T,X,Y1,...,Yn] = sim('model',Timespan, Options, UT)
If you specify only the model argument, Simulink automatically saves the time, state, and output to the specified output arguments.

If you do not specify any output arguments, Simulink determines what data to log based on the settings for the Configuration Parameters > Data Import/Export pane. Simulink stores the simulation output either in the current workspace or in the variable ans, based on the setting for Save simulation output as a single object parameter.

Backward-Compatible Syntax Input and Output Arguments
Argument    Description

T	The time vector returned.
X	The state returned in matrix or structure format. The state matrix contains continuous states followed by discrete states.
Y	The output returned in matrix or structure format. For block diagram models, this variable contains all root-level blocks.
Y1,...,Yn	The outports, which can only be specified for diagram models. Here, n must be the number of root-level blocks. Each outport will be returned in the Y1,...,Yn variables.
'model'	The name of the model to simulate.
Timespan	The timespan can be TFinal, [TStart TFinal], or [TStart OutputTimes TFinal]. Output times are time points returned in T, but in general, T includes additional time points.
Options	Optional simulation parameters created in a structure by the simset command using name-value pairs.
UT	Optional external inputs. For supported expressions, see Load Data to Root-Level Input Ports.