The term Hardware-in-the-Loop testing is primarily found in the fields of automation, industry, and Industry 4.0, as well as the Internet of Things. These tests play an important role when new controllers or products are developed that are later intended to operate in real machines or systems.

Hardware-in-the-loop testing involves connecting real hardware, such as a control unit, to a virtual environment. This environment can simulate real-world conditions – for example, the operation of a machine or the behaviour of a car. This allows testing how the control unit reacts in different situations without requiring a complete production facility to be running.

A vivid example: A car manufacturer develops a new brake control system. Before it is tested in real vehicles, the control system is connected to a simulator that „simulates“ various braking situations. This saves time and costs, and increases safety, as errors can be detected early.

Thanks to Hardware-in-the-Loop tests, companies can make the development of new products faster and safer. This reduces the risk of expensive failures or accidents when the product is later used in real-world applications.

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