Final answer:
The minimum clearance rearwards of the anti-intrusion plate in occupant safety testing depends on the test requirements, and is designed to allow for deformation and energy absorption. Consult relevant test standards for specific clearance requirements.
Step-by-step explanation:
In occupant safety testing, such as IA testing, the minimum clearance rearward of the anti-intrusion plate to the test fixture is determined by the particular requirements of the test being performed. The anti-intrusion plate is often placed in the path of an impact and used to mimic the rear structure of a car. Usually, the clearance between the plate and the test fixture is made to permit the necessary energy absorption and deformation during the test.
To enable the vehicle to compress and absorb the impact energy, the anti-intrusion plate, for instance, might be positioned a specific distance behind the test fixture in a rear impact test. The specific clearance will vary depending on the test standards and regulations that apply to the particular test.
It is important to consult the relevant test standards and guidelines, such as those provided by organizations like the National Highway Traffic Safety Administration (NHTSA) or the International Organization for Standardization (ISO), to determine the specific minimum clearance requirements for rearward movement of the anti-intrusion plate during testing.