With a brand-new fuzzy control algorithm in hand and a heavy heart, Liu Li and her colleagues stood before the test bench once again. After inspection and maintenance, the mechanical jamming problem of the prototype was eliminated, and Sun Mei further optimized the signal processing circuit of the vibration probe, resulting in a significant improvement in noise suppression.

“Start!” Zhou Wei’s voice was much calmer than before.

The test bench roared to life again. The rotation speed steadily increased.

"500 RPM, that's normal."

"Vibration begins at 1000 revolutions per minute."

“1500 revolutions per minute, the vibration amplitude has entered the set threshold!” Sun Mei stared intently at the oscilloscope.

This time, the control algorithm did not immediately issue a drastic adjustment command. It "observed" the amplitude and trend of the vibration signal, judging it to be of a "moderate" level and "slowly increasing." According to the preset rules, it output a "fine-tuning" command.

The electromagnet inside the device moved slightly, causing a small mass to move a tiny distance.

The test bench did not experience the expected violent shaking! After a brief fluctuation, the vibration amplitude noticeably decreased slightly!

"It works!" Liu Li exclaimed softly, clenching her fists tightly.

As the rotational speed continued to increase, the vibration intensified. The fuzzy control algorithm, like a patient traditional Chinese medicine doctor, continuously "diagnosed" the vibration, adjusting the position of the mass block carefully, sometimes "fine-tuning" and sometimes "moderate-tuning," based on the "pulse" (magnitude and trend) of the vibration.

Although the operating sound of the test bench still fluctuated, there was no longer the uncontrolled, heart-stopping violent shaking like before. The vibration amplitude was controlled at a relatively stable level, much lower than when it was uncontrolled.

When the rotational speed reached 85% of the rated operating point, Sun Mei reported the key data: "The vibration amplitude is stable! Compared with the uncontrolled operation... it has decreased by about 60%!"

Sixty percent!

Although there is still a gap between eliminating vibration completely and achieving it, and the control process is not yet fast or perfect, this result is undoubtedly a huge and milestone achievement! It proves the feasibility of the "online dynamic balancing" technical approach and demonstrates that their fuzzy control approach based on "feel" and "experience" is effective when facing this rough and complex real system!

"We did it! We did it!" Zhou Wei excitedly took off his glasses, rubbed his eyes vigorously, and his face was filled with barely suppressed excitement.

Sun Mei also breathed a long sigh of relief and showed the first truly relaxed smile in days.

Looking at the smoothly operating device on the test bench and listening to the no longer jarring sound, Liu Li felt a huge weight lifted from her heart. She walked to the control panel, looked at the clearly suppressed vibration curve on the screen, and her eyes welled up with tears.

The success of this second experiment, though only a partial one, acted like a shot in the arm, greatly boosting the team's morale. It proved the value of changing perspectives and boldly trying new things in the face of adversity. The thorny path they had forged themselves was finally showing signs of success.

The tasks ahead are now very clear: building upon the solid foundation of our current achievements, we must further explore and refine the crucial control rules, and make every effort to implement effective measures to significantly improve the speed and efficiency of the entire system's response to external stimuli. Simultaneously, we must relentlessly and persistently work to improve and enhance its ability to suppress various vibration phenomena—only by doing so can we truly achieve the ambitious and arduous goal of completely solving the long-standing technical challenge of high-speed spindles that has plagued countless researchers and engineers! Let us muster our energy and forge ahead!