# 问题
转速在14s之后一直掉
![[Pasted image 20250120102349.png]]

## yaw求解过程


1 输入yaw_mom from 控制


multibody_solution 1834-1846行

Elastodyn.f90 8295
FAST_Subs.f90
- 4835
- 4520
- 4865

pmom_bnc_rt  在基板 (point O) 处由机舱、发电机和转子产生的偏力矩 [-] 2方向
Partial moment at the base plate (body B) / yaw bearing (point O) due the nacelle, generator, and rotor [-]
- 2, 10: yaw 差距较小    3-11
- 2, 12: geaz  差距较大  3-13
- 2, 13: drtr 差距较大     3-14


pmom_ngn_rt 就有问题
Partial moment at the nacelle (body N) / selected point on rotor-furl axis (point V) due the structure that furls with the rotor, generator, and rotor [-]

pmom_lprot 有问题 （2，10）



pfrc_prot 有问题
plin_vel_ec 10, 0, 0有问题
Partial linear velocity (and its 1st time derivative) of the hub center of mass (point C) in the inertia frame (body E for earth) [-]