The success of the second experiment was like a ray of sunshine breaking through the gloom. However, Liu Li and the other two knew that a 60% suppression rate was far from enough; the device's reaction speed and stability still had considerable room for improvement. After a brief celebration, they immediately threw themselves into more refined optimization work.

The laboratory once again became a battleground for tackling key challenges.

Zhou Wei carefully analyzed every detail of the control process using the experimental data. "Look here," he pointed to a vibration curve, "the algorithm judged the vibration to be 'large' and issued a 'medium adjustment' command, and the vibration did indeed decrease. But then the vibration entered the 'medium' range, and the algorithm immediately switched to 'fine adjustment,' and the response couldn't keep up, causing the vibration to rise slightly. Is our rule switching too 'hard'? Can we add a transition zone, or introduce a smoother adjustment mechanism?"

He began working on optimizing the fuzzy rule base and inference mechanism to make the output of control commands smoother and reduce mutations.

Sun Mei continued to work on the signal. She discovered that the frequency components of the vibration signal differed at different rotational speeds, and their self-made probe had varying sensitivities to different frequencies. "This causes the algorithm to 'sense' inaccurately at certain rotational speeds," she explained. "I have to find a way to do simple frequency compensation or optimize the filtering parameters to make the probe 'hear' more accurately."

Liu Li focused on the mechanical aspects. She carefully observed the movement of the electromagnet driving the mass block and discovered a slight impact during startup and shutdown. "It's this impact that might be introducing new, minute vibrations!" She tried adding soft-start and soft-stop mechanisms to the electromagnet control circuit to make the mass block's movement smoother. She also discussed with Zhou Wei optimizing the mass block's mass configuration to find the optimal balance between response speed and compensation effect.

The optimization work was tedious and tedious. Often, Zhou Wei would fix the algorithm, and then Sun Mei would need to adjust the signal processing; Liu Li would improve the mechanics, and then the control parameters would have to be readjusted. They were like three closely meshed gears, constantly cycling through debugging, testing, analysis, and modification.

The test bench started and stopped repeatedly. Vibration data was recorded and compared over and over again. Sometimes a small change could bring about a visible improvement, while other times a lot of effort would yield little result, or even a regression.

"This parameter is no good; the response is too slow, and the vibration is increasing!"

"The filtering has been overdone; it's filtering out useful signals too!"

"The electromagnet's buffering time is too long; it can't keep up with the changes in vibration!"

Failures and setbacks remain commonplace. But this time, the team atmosphere is completely different. Gone is the initial confusion and anxiety; replaced by a clear-cut dedication and a tacit understanding of mutual support. When problems arise, they gather to discuss, share their opinions, and brainstorm ideas.

"I think the problem might be here..."

"How about we try this method?"

"Mr. Zhou, please recalculate this parameter range..."

After countless trials and adjustments, the optimization effects began to accumulate and become apparent. The vibration suppression rate steadily increased from 60% to 65%, 70%, 75%, and so on.

When the latest test data showed that the vibration suppression rate had stably reached over 85%, and the device operated smoothly throughout the entire test speed range, an uncontrollable cheer erupted in the laboratory!

"Eighty-five! It's over eighty-five!" Zhou Wei looked at the screen, his voice trembling with excitement.

Sun Mei clapped her hands vigorously, a bright smile spreading across her face.

Liu Li let out a long, satisfied sigh, feeling that all the fatigue and pressure of the past few months were worth it at this moment.

Through repeated optimizations, they patiently and wisely refined their initial, rough idea into a technological prototype with real practical potential. The path to ultimate success became increasingly clear and solid with each relentless optimization.