In Hardware-in-the-Loop testing (HiL testing), electronic controls or mechatronic components (devices under test, DUTs) are evaluated by a realistic real-time simulation model.
The Hardware-in-the-Loop simulator imitates a variety of application scenarios, also taking the particularities of the future operating environment into account. For instance, this includes maintaining response times of the real system or applying realistic noise levels to the signals. All in all, the HiL simulator tricks the DUT into “thinking” that it is integrated in the fully assembled product during test runtime.
With the help of Hardware-in-the-Loop simulations, DUTs can be tested for correct functionality quickly, cost-efficient and realistically. The repeatability of HiL simulations under exactly the same conditions allows for an objective comparison of the DUT with other prototypes or so-called “golden samples” (devices that are considered good) in the development phase.