VTOL Standard: fix transition pusher motor slew rate

Signed-off-by: Silvan Fuhrer <silvan@auterion.com>

src/modules/vtol_att_control/standard.cpp

@@ -200,8 +200,11 @@ void Standard::update_transition_state()
 
 		} else if (_pusher_throttle <= _param_vt_f_trans_thr.get()) {
 			// ramp up throttle to the target throttle value
+			const float dt = math::min((now - _last_time_pusher_transition_update) / 1e6f, 0.05f);
 			_pusher_throttle = math::min(_pusher_throttle +
-						     _param_vt_psher_slew.get() * _dt, _param_vt_f_trans_thr.get());
+						     _param_vt_psher_slew.get() * dt, _param_vt_f_trans_thr.get());
+
+			_last_time_pusher_transition_update = now;
 		}
 
 		_airspeed_trans_blend_margin = getTransitionAirspeed() - getBlendAirspeed();

src/modules/vtol_att_control/standard.h

@@ -76,6 +76,7 @@ private:
 
 	float _pusher_throttle{0.0f};
 	float _airspeed_trans_blend_margin{0.0f};
+	hrt_abstime _last_time_pusher_transition_update{0};
 
 	void parameters_update() override;