olemus
Wiktionary:
noun
4. something constructed with the size and form of a human, to be used in place of a person
To understand the effects of the accident, we dropped a dummy from the rooftop.

piltllikult
https://duckduckgo.com/?q=test+dummy&t=h_&iax=images&ia=images

näide
inimese makett füüsilistel testimistel,
võib olla varustatud anduritega
ja muude andmehõive vahenditega

https://en.wikipedia.org/wiki/Crash_test_dummy