Industrial robots usually perform structured tasks, which means that their programs, state changes, and communications are cyclical, and hacker attacks can significantly disrupt this periodicity. For example, stopping a robotic arm, or causing it to make a large error, or causing abnormal network traffic, these are easy to detect, why do we need to study this problem in the academic field? It seems like an easy fix. So I don't think industrial robots need intrusion detection. Can someone explain or discuss this for me?