For the detailed description of the problem setup, have a look at http://www.engin.umich.edu/group/ctm/examples/cruise/cc.html
You will find there also all the steps of the paper-and-pencil procedure necessary for the equation formulation and transformation
before MATLAB can be used to compute the open-loop response.
Modeling using DYNAST
When using DYNCAD, you need not to
deal with any equations at all. You can easily set up the system model
in graphical form
from a kit of dynamic elements. Open the following system model in DYNCAD and see its Help for more details.
Step response computation
To compute the open-loop step response of the system using DYNCAD
Transfer function computation
DYNAST can also provide linearization and semisymbolic analysis of the system model. To see the following list of poles and zeros of the system transfer function(s)
Analog PID controller design
You can use the transfer function computed above to design a PID controller for the plant following the procedure given on http://www.engin.umich.edu/group/ctm/examples/cruise/ccPID.html
To avoid copying the transfer function data manually it is posibble to export the data in an M-file for MATLAB sent to you by e-mail. To recieve it
Add the designed PID control loop to the plant to form the following model of the controlled system.
To verify the designed system by computing its step response, click Compute analysis in the DYNAST pull-down menu in DYNCAD