Fault Detection and Identification for Nonlinear Process Based on Inertia-Based KEPCA and a New Combined Monitoring Index

Table 1

Variables of the TE process.

No.	Process variable
1	A feed (stream 1)
2	D feed (stream 2)
3	E feed (stream 3)
4	Total feed (stream 4)
5	Recycle flow (stream 8)
6	Reactor feed rate (stream 6)
7	Reactor pressure
8	Reactor level
9	Reactor temperature
10	Purge rate (stream 9)
11	Product separator temperature
12	Product separator level
13	Product separator pressure
14	Product separator under flow (stream 10)
15	Stripper level
16	Stripper pressure
17	Stripper under flow (stream 11)
18	Stripper temperature
19	Stripper steam flow
20	Compressor work
21	Reactor cooling water outlet temperature
22	Separator cooling water outlet temperature
23–28	Components A, B, C, D, E, and F in stream 6
29–36	Components A, B, C, D, E, F, G, and H in stream 9
37–41	Components D, E, F, G, and H in stream 11
42	MV for D feed flow (stream 2)
43	MV for E feed flow (stream 3)
44.	MV for A feed flow (stream 1)
45	MV for total feed flow (stream 4)
46	MV for compressor recycle valve
47	MV for purge valve (stream 9)
48	MV for separator pot liquid flow (stream 10)
49	MV for stripper liquid prod flow (stream 11)
50	MV for stripper steam valve
51	MV for reactor cooling water flow
52	MV for condenser cooling water flow