Low‐Latency Wireless Data Transfer for Motion Control

Abstract

This paper discusses a new approach for wireless motion control. Existing wireless techniques suffer from large closed loop delays of several milliseconds, which is unacceptable in precision motion systems. These large delays are mainly caused by the protocol used, since these are optimized for transferring large amounts of data, not to minimize transmission delay. A new protocol and wireless system are proposed that reduce the closed loop transmission delay to less than 300 microseconds. The system has been verified in a real control system, and measurements show the performance, which is more than ten times better than existing techniques.

Emerging wireless applications in aerospace: Benefits, challenges, and existing methods

“…Thus, in many wireless control applications with low transmission delay requirements, these protocols are not the best choice. For instance, in a high precision motion system with closed loop bandwidth requirements up to several hundreds of Hz, transmission delay has to be less than a few milliseconds [25]. …”