Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic PID loop control   The Horizontal Test Stand (HTS) SRF Cavity and Cryomodule 1 (CM1) of eight
9-cell, 1.3GHz SRF cavities are operating at Fermilab. For the cryogenic
control system, how to hold liquid level constant in the cryostat by regulation
of its Joule-Thompson JT-valve is very important after cryostat cool down to
2.0 K. The 72-cell cryostat liquid level response generally takes a long time
delay after regulating its JT-valve; therefore, typical PID control loop should
result in some cryostat parameter oscillations. This paper presents a type of
PID parameter self-optimal and Time-Delay control method used to reduce
cryogenic system parameters' oscillation.

16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph