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AC_WPNav: cope with negative WPNAV_SPEED_DN 

a user set WPNAV_SPEED_DN to a negative value, with odd results. Take
absolute value to cope. Even though the param docs clearly say range
should be positive, it is one where it is easy to think it should be
negative
This commit is contained in:
Andrew Tridgell 2021-09-07 12:41:09 +10:00
parent 747f03c8de
commit a58f61a29c
2 changed files with 4 additions and 4 deletions
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6
libraries/AC_WPNav/AC_WPNav.cpp
View File

@ -113,7 +113,7 @@ AC_WPNav::AC_WPNav(const AP_InertialNav& inav, const AP_AHRS_View& ahrs, AC_PosC
_flags.fast_waypoint = false;
// initialise old WPNAV_SPEED value
_last_wp_speed_cms = _wp_speed_down_cms;
_last_wp_speed_cms = get_default_speed_down();
}
// get expected source of terrain data if alt-above-terrain command is executed (used by Copter's ModeRTL)
@ -167,8 +167,8 @@ void AC_WPNav::wp_and_spline_init(float speed_cms)
// initialise position controller speed and acceleration
_pos_control.set_max_speed_accel_xy(_wp_desired_speed_xy_cms, _wp_accel_cmss);
_pos_control.set_correction_speed_accel_xy(_wp_desired_speed_xy_cms, _wp_accel_cmss);
_pos_control.set_max_speed_accel_z(-_wp_speed_down_cms, _wp_speed_up_cms, _wp_accel_z_cmss);
_pos_control.set_correction_speed_accel_z(-_wp_speed_down_cms, _wp_speed_up_cms, _wp_accel_z_cmss);
_pos_control.set_max_speed_accel_z(-get_default_speed_down(), _wp_speed_up_cms, _wp_accel_z_cmss);
_pos_control.set_correction_speed_accel_z(-get_default_speed_down(), _wp_speed_up_cms, _wp_accel_z_cmss);
// calculate scurve jerk and jerk time
if (!is_positive(_wp_jerk)) {

2
libraries/AC_WPNav/AC_WPNav.h
View File

@ -71,7 +71,7 @@ public:
float get_default_speed_up() const { return _wp_speed_up_cms; }
/// get default target descent rate in cm/s during missions. Note: always positive
float get_default_speed_down() const { return _wp_speed_down_cms; }
float get_default_speed_down() const { return fabsf(_wp_speed_down_cms); }
/// get_speed_z - returns target descent speed in cm/s during missions. Note: always positive
float get_accel_z() const { return _wp_accel_z_cmss; }