Figure 2: Flow chart of control instruction release model. 
During system control of the target computer, the 
interaction sequence of various information is shown 
in  the  following  system  control  sequence  diagram. 
(Chu, 2020)
 
 
Figure 3: System control sequence diagram. 
The  system  control  commands  issued  by  the 
control instruction release model are recorded in the 
form of database files. The specific contents of the 
database file include: serial number, program name, 
program  status,  name  of  the  computer  where  the 
program is located, IP address of the computer where 
the program is  located, path of the computer where 
the program is located, remarks, etc. (Gao, 2019) 
(3) Design of listening model of controlled node 
Receive,  execute,  record  and  respond  to  the 
simulation start, pause, continue and end commands 
sent  by  the  control  instruction  release  model.  After 
receiving  the  control  command,  the  controlled  end 
will prompt in the form of text, image, sound, etc. 
(4)  Design  of  response  information  receiving, 
statistics and prompt model 
The received response information is displayed in the 
message window of the software and recorded in the 
form  of  data  file.  The  component  clears  the  last 
recorded data every time it starts. 
3  PROCESS PLAYBACK 
COMPONENT 
1) Composition 
The  process  playback  component  consists  of  three 
models,  including:  simulation  countermeasure 
information  reading  model,  simulation  time  control 
model  and  simulation  countermeasure  information 
release model, as shown in the figure below. 
 
Figure 4: Composition of process playback model. 
2) Design 
Playback in distributed interactive environment. 
(1) Design of simulation countermeasure information 
reading model 
Before playback, read all simulation countermeasure 
information  (including  entity  status  information, 
firing  information,  explosion  information,  damage 
information, etc.) into the computer memory. 
(2) Design of simulation time control model 
Set a time cycle to control the start time of playback, 
playback  speed  (real-time,  proportional  real-time, 
super real-time), and jump (forward and backward). 
(3) Design of simulation countermeasure information 
release model 
Obtain  the  current  simulation  time  t  from  the  time 
cycle,  set  the  simulation  step  as  △T, and query 
whether  there  is  simulation  countermeasure 
information in (t, t + △T) within any simulation step. 
If so, release the information. 
4  DATABASE COMPONENTS 
The  database  component  consists  of  data  record 
model,  data  management  model  and  data  analysis 
model.