Dynamic System Simulation

Dynamic system simulation focuses at the level of the entire system as it operates in its intended environment. This type of simulation allows testing of the system in its intended modes of operation as well as under dangerous emergency conditions without risking loss of life or valuable assets. Environmental conditions that may be difficult or impossible to access for system tests (such as icy roads in the middle of summer, or outer space) can be simulated using computers and appropriate software algorithms. Using simulation, intricate test sequences can be performed quickly and repeatably at relatively low cost.

Prototype hardware and software can be tested at the subsystem level with the use of hardware-in-the-loop (HIL) simulations long before a full-up system prototype is available for testing. HIL simulations run at real time speeds and perform I/O with the system or subsystem under test so that the test item "thinks" it is operating as part of a real system in its operational environment. These systems or subsystems can then be tested under nominal conditions as well as at (and beyond) their intended operational boundaries to confirm proper operation under all conditions. The ability to thoroughly test subsystems using simulation early in the development process can greatly reduce the debugging time and project risk compared to the alternative approach of waiting until a prototype is completed before performing integration and testing.