Application of Model-Based Deep Learning Algorithm in Fault Diagnosis of Coal Mills

Table 1

Nomenclature.

Symbol	Meaning
	Maximum flow of cold air (kg/s)
	Maximum flow of hot air (kg/s)
	Valve position of cold air
	Valve position of hot air
	Temperature of cold air (°C)
	Temperature of hot air (°C)
	Differential pressure of primary air (mbar)
	Specific heat capacity of mixed primary air (kJ/(kg·°C))
	Specific heat capacity of cold air (kJ/(kg·°C))
	Specific heat capacity of hot air (kJ/(kg·°C))
	Inlet primary air temperature of coal mill (°C)
	Inlet primary air flow of coal mill (kg/s)
	Outlet pulverized coal flow of coal mill (kg/s)
	The mass of pulverized coal in coal mill (kg)
	Inlet coal flow of coal mill (kg/s)
	The mass of raw coal in coal mill (kg)
	Outlet temperature of coal mill (°C)
	Evaporation of coal moisture (kg/s)
	Pulverized coal (%)
	Coal moisture (%)
	Current of coal mill (A)
	Delay time of the value position to primary air flow (s)
	Delay time of value position to primary air temperature (s)
	Identified model parameters