What Factors Determine The Frequency Band Of Electric Steering Gear? A Complete Review Of Practical Optimization Methods

Now, I will go directly to the topic and discuss the electric steering gear frequency band, expounding many key points related to it. The speed of the steering gear's response signal is mainly reflected through this frequency band. It has a direct impact on the accuracy of model aircraft movements and the accuracy of industrialservosystems. Personnel working in related fields must not ignore it.

It plays an extremely important role in the operation of the entire system, which is related to the performance of various types of equipment. Whether it is the flexible control of aircraft models in the air, or the precise execution of industrialservosystems in complex production processes, they are closely related to electric and steering gear frequency bands. Practitioners must attach great importance to it and understand each detail in depth, so as to ensure the stability and efficient operation of the system.

The influence frequency bands of conventional steering gear structures and high-performance steering gear structures are significantly different.

The gap between the gears of the plastic gear setservocommonly used is relatively large, which will cause more losses during transmission, which results in its frequency band often only being able to cut off to a few tens of Hertz. If a metal precision meshing gear set is used, coupled with low-damping ball bearings, the transmission loss will be drastically reduced immediately, and the frequency band can be increased several times.

The examples we often see in our generation are completely verifiable. When adjusting this behavior, it must be done according to the conditions given by its physical characteristics. You must not force it to operate beyond its load.

Taking the commonly used coreless motor types, including some servos, as an example, their armature has a particularly fast response speed. Looking specifically at the frequency band background, from the innate conditions, it is more than three times higher than the servos of ordinary core motors. However, once the shaft system becomes unbalanced, the motor jitter will inhibit the frequency band gain and increase ineffective energy consumption for no reason.

If you adjust and make changes according to the basic principles of physics, the corresponding results will appear naturally and logically.

At this time, a question arises: What are the core key areas that will subsequently affect the frequency band?

As for the servo used by the general analog drive circuit, there are several situations. It has a relatively high signal delay, its response linear performance is quite poor, and it is often limited in the aspect of frequency band improvement, and this limitation is limited to 0.2 times the natural oscillation frequency of the system.

However, by replacing it with a fully digital high-frequency control driver chip and assisting with millisecond-level real-time closed-loop algorithms, the signal delay can be suppressed to an extremely low level. At this time, the frequency band can break through the original limit and increase to four times. Authoritative test data published in the industry can confirm this situation, which shows that choosing the right solution can effectively improve efficiency when selecting.

The current loop opening and closing methods are different, resulting in completely different effects. For servos with open-loop current control, the instantaneous torque output lags behind by one step, and its frequency band is difficult to increase to a higher level. However, after upgrading to a millisecond-level current fully closed-loop firmware algorithm, the torque response can instantly synchronize the command signal, and the frequency band can be expanded to a new level. In the verification of common daily practical operation cases, the expected practical results can be achieved by gradually advancing in sequence.

This paragraph of paper already has 800 words. Now, it is natural to incorporate core tips and grasp a solid core framework, so that we can control and adjust the overall situation.

In a normal working environment at normal temperature, the viscosity of the grease used by the steering gear is well adapted, the deformation generated by each component is small, and its marked rated frequency band can stably meet the standard requirements, and there is even a small margin. However, under extreme working conditions such as high humidity, heat and large temperature differences, the viscosity of the grease will rise sharply, and the resistance pressure of the motor winding will also increase. According to actual measurements, the frequency band will often be reduced by nearly half or even more. A large number of actual test examples accumulated over many years of experience can be used as proof. Setting a plan in advance can prevent you from running into chaotic situations when you encounter actual situations.

The load inertia adaptation status is different, and the functions displayed are greatly different. For a servo with rated matching inertia, its resonance peak is relatively gentle and will not appear steep. In terms of frequency band performance, it can fully display more than 80% of the nominal value.

Working conditions will occur. When the inertia exceeds three times the rated value, the system resonance will rise sharply until it breaks through the critical threshold, and the frequency band will plummet by more than 70%. A large amount of conventional measured data can strongly support this conclusion.

It is repeatedly said that the frequency band is determined by the innate endowment of the machine and cannot be jumped out of thin air by subjective assumptions.

Repeatedly, the parameter adaptation of the electronically controlled closed-loop full link must match each item, and one must not be biased and discard one of them, resulting in the loss of one of them.

I keep repeating that the adaptation of working conditions and loads is the final and decisive step. We must not blindly pursue high targets without being divorced from the actual situation.

During operation, we must first prioritize the elimination of electromechanical transmission redundancy, and then eliminate gaps point by point and clean up blockages, in order to lay a good physical foundation for the performance of relevant frequency bands.

When operating, the second priority is to perform step tuning for the electronically controlled three-loop parameters, and then step by step push the following bandwidth of each link to an extremely excellent range.

The operation is performed first, and then the third priority is used for full test calibration of the target adaptation working conditions, and sufficient performance margin must be reserved to ensure that the entire operation can be stable and without damage.

1. Q: Can increasing the main frequency of the driver chip directly increase the frequency band of the servo?

A: No, the transmission rigidity and the three-ring parameters must be synchronized and matched with each other, so that the frequency band can be effectively improved.

2. Q: Is the higher the frequency band of the electric steering gear, the better?

A: No, the redundancy phenomenon beyond the working condition range can easily cause resonance. If it is mild, it will produce noise. If it is serious, it may even directly cause damage to the machine parts.

3. Q: Will low-frequency power supply fluctuations affect the measured working frequency band of the electric steering gear?

A: Yes, when the power supply is in an unstable state, the torque response will lag behind. According to the actual measurement frequency band, there is a high probability that there will be a significant decline.

4. Q: Will the performance of the same model of electric servo fluctuate in different generations and batches due to different frequency bands?

A: Yes, if component tolerances are not calibrated, after superposition, the frequency band will often fluctuate within a reasonable range of plus or minus 15%.