The current outputted by the PID control system is subjected to operational amplification and driving to obtain the required compensation current magnetic potential I2eWe, and the operation and amplification link is proportional control in the automatic control system. The biggest disadvantage of proportional control is that there is a residual. When there is a higher requirement for control quality, it needs to be based on the proportional control, plus the integral control function that can eliminate the residual. Even if the deviation is small in the differential control system, as long as there is a change trend, it can be controlled immediately, and has the characteristics of advanced control. Therefore, the PID controller is used in the differential current compensation loop. The PID feedback circuit is shown in the figure. It can not only control quickly, but also eliminate the residual and has better control performance.
What is a miniature slip ring? Miniature slip rings are rotary electrical connectors that allow power and data to be transferred between a stationary and rotating structure. They are often used in medical, military, and aerospace applications where size and weight are critical factors.
A miniature slip ring typically consists of two parts: a stationary housing and a rotating contact assembly. The contact assembly contains the brushes that make electrical contact with the rotating structure, as well as the rings that conduct current or data.
The housing can be made from any number of materials, including metals, plastics, and composites. It is typically designed to be as small and lightweight as possible while still providing adequate strength and durability.
The contact assembly is made from precious metals such as gold or silver in order to provide good electrical conductivity.
Technology improves with the continuous development of precision machinery. The more sophisticated the equipment, the smaller the volume will be. And the space that can be accommodated for installing the slip ring is also very small. The key parts of some equipment are quite a district. Especially in the high-end military, aerospace and aviation fields. 360-degree rotation is required to transmit current and signals. And the installation space is greatly reduced. It is to make the equipment work more smoothly. Therefore, it is necessary to design the slip ring to be small and exquisite. Otherwise, it won't meet the needs of the installation.
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The working process of the PID operation circuit is as follows: When the input signal Ii has a step change, the CD, C1 is equivalent to a short circuit, and the input signal suddenly jumps to the differential action maximum value. Then, as the CD is charged, the negative feedback voltage gradually rises, and the output current I0 gradually decays. At the same time, CI is also charged. As the voltage across CI increases, the negative feedback effect gradually decreases, and the output current I0 rises slowly.
At the same time, we have moved with the continuous development of science and technology. Various high-end precision instruments have been developed. It requires the slip ring to transmit the current amount of general power. Also often undertake the transmission of weak electrical signals and various weak signals. The transmission medium is wider, and the number of loops of the slip ring is increasing.
