PX4 parameter group: FW Longitudinal Control

This page lists named parameter set commands in the PX4 FW Longitudinal Control group. All commands use PARAM_SET and are governed by PX4_COMMAND_MODE, operator guard, and PX4_PARAMETER_WRITE_ALLOWLIST.

Metric	Count
Parameters	17
`FLOAT`	17
`INT32`	0
`Standard`	17
`System`	0
`Developer`	0
Reboot required	0
`volatile`	0

Parameters

PX4 Parameter	Command type	Category	Type	Default	Range	Unit	Shape	Reboot	Volatile	PX4 short description
`FW_GND_SPD_MIN`	`px4.parameter.fw_gnd_spd_min.set`	Standard	Float	5.0	0.0..40.0	m/s	-	no	no	Minimum groundspeed
`FW_THR_SLEW_MAX`	`px4.parameter.fw_thr_slew_max.set`	Standard	Float	0.0	0.0..1.0	-	-	no	no	Throttle max slew rate
`FW_T_ALT_TC`	`px4.parameter.fw_t_alt_tc.set`	Standard	Float	5.0	>= 2.0	-	-	no	no	Altitude error time constant
`FW_T_F_ALT_ERR`	`px4.parameter.fw_t_f_alt_err.set`	Standard	Float	-1.0	>= -1.0	-	-	no	no	Fast descend: minimum altitude error
`FW_T_HRATE_FF`	`px4.parameter.fw_t_hrate_ff.set`	Standard	Float	0.5	0.0..1.0	-	-	no	no	Height rate feed forward
`FW_T_I_GAIN_PIT`	`px4.parameter.fw_t_i_gain_pit.set`	Standard	Float	0.1	0.0..2.0	-	-	no	no	Integrator gain pitch
`FW_T_PTCH_DAMP`	`px4.parameter.fw_t_ptch_damp.set`	Standard	Float	0.1	0.0..2.0	-	-	no	no	Pitch damping gain
`FW_T_RLL2THR`	`px4.parameter.fw_t_rll2thr.set`	Standard	Float	15.0	0.0..20.0	-	-	no	no	Roll -> Throttle feedforward
`FW_T_SEB_R_FF`	`px4.parameter.fw_t_seb_r_ff.set`	Standard	Float	1.0	0.5..3.0	-	-	no	no	Specific total energy balance rate feedforward gain
`FW_T_SINK_MAX`	`px4.parameter.fw_t_sink_max.set`	Standard	Float	5.0	1.0..15.0	m/s	-	no	no	Maximum descent rate
`FW_T_STE_R_TC`	`px4.parameter.fw_t_ste_r_tc.set`	Standard	Float	0.4	0.0..2.0	-	-	no	no	Specific total energy rate first order filter time constant
`FW_T_TAS_TC`	`px4.parameter.fw_t_tas_tc.set`	Standard	Float	5.0	>= 2.0	-	-	no	no	True airspeed error time constant
`FW_T_THR_DAMPING`	`px4.parameter.fw_t_thr_damping.set`	Standard	Float	0.05	0.0..1.0	-	-	no	no	Throttle damping factor
`FW_T_THR_INTEG`	`px4.parameter.fw_t_thr_integ.set`	Standard	Float	0.02	0.0..1.0	-	-	no	no	Integrator gain throttle
`FW_T_THR_LOW_HGT`	`px4.parameter.fw_t_thr_low_hgt.set`	Standard	Float	-1.0	>= -1.0	m	-	no	no	Low-height threshold for tighter altitude tracking
`FW_T_VERT_ACC`	`px4.parameter.fw_t_vert_acc.set`	Standard	Float	7.0	1.0..10.0	m/s^2	-	no	no	Maximum vertical acceleration
`FW_WIND_ARSP_SC`	`px4.parameter.fw_wind_arsp_sc.set`	Standard	Float	0.0	>= 0.0	-	-	no	no	Wind-based airspeed scaling factor