### 17.3.7. Transient Blade Row Models Parameters

`ps max coeff loops`
Type | Integer
Default Value | 3
Description | This parameter controls the maximum number of coefficient loops in the initialization and phase shifted startup cycles of the Fourier Transform model. This parameter is applicable to inlet disturbance or flutter cases.
`ps number periodic cycles`
Type | Integer
Default Value | 2
Description | Defines the number of periodic cycles of initialization of the Fourier Transform model. The purpose of the cycles is to initialize the Fourier coefficients before the start of phase shifting. The length of these cycles is the period of the disturbance being modeled. This parameter is applicable to inlet disturbance or flutter cases.
`ps number startup cycles`
Type | Integer
Default Value | 1
Description | This parameter controls the number of phase shifted startup cycles of the Fourier Transform model. The purpose of the cycles is to limit the maximum number of coefficient loops at the start of phase shifting. The length of these cycles is the period of the disturbance being modeled. This parameter is applicable to inlet disturbance or flutter cases.
`ps reconstr mflow from sfc`
Type | Logical
Default Value | f
Description | This is a flag that controls the reconstruction of the mass flow at the pitchwise periodic interfaces from the accumulated Fourier coefficients for the Fourier Transform model. This parameter is applicable to inlet disturbance or flutter cases.
`ps relax sngl fourier coeff value`
Type | Real
Default Value | 0.7
Description | This is a relaxation parameter applied to the accumulation of Fourier coefficients for the Fourier Transform model. This parameter is applicable to inlet disturbance or flutter cases.

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