Improved performance of motor-drive systems by SAW shaft torque feedback

摘要

With servo drive systems continually improving in f performance capability, improved control of the electromechanical system dynamics is becoming an increasingly common industrial requirement. However, impulsive transient demands from such systems can excite mechanical torsional resonances in the associated drive-train, ultimately leading to controller instability, as illustrated in Figure 1 showing tortional oscillation in a rotating shaft after the application of a 7 Nm step load change, as measured via an in-line instrument SAW transducer.