fly/flightgear
1
0
Fork 0
Code Activity
flightgear/src/Instrumentation/inst_vertical_speed_indicator.hxx

86 lines
2.3 KiB
C++
Raw Normal View History

TJ: Annexed an IVSI (instantaneous ertical speed indicator), which bypasses a limitation with Concorde : - the cruise at Mach 2 must be with a slow climb rate of 50/60 ft/min (2h from 50000 ft). - with /velocities/vertical-speed-fpm, the real climb rate (altimeter) varies : One must constantly (every 5-10 minutes) change the vertical speed hold of the autopilot between 10 ft/min and 200 ft/min. This is very annoying because not a constant offset : that could be a lack of sensitivity of /velocities/vertical-speed-fpm (FDM ?). This new IVSI : - Is an emulation with works with environment pressure : a real IVSI works with static pressure (with lag) + accelerometers. It is not forbidden to later upgrade to the real model. - Doesn't require a tuning of the autopilot made with /velocities/vertical-speed-fpm (also tested with 737, 747) : Concorde's autoland works without update.
2005-06-25 08:46:58 +00:00
// inst_vertical_speed_indicator.hxx -- Instantaneous VSI (emulation calibrated to standard atmosphere).
//
// Started September 2004.
//
// Copyright (C) 2004
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
new FSF address
2006-02-21 01:16:04 +00:00
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
TJ: Annexed an IVSI (instantaneous ertical speed indicator), which bypasses a limitation with Concorde : - the cruise at Mach 2 must be with a slow climb rate of 50/60 ft/min (2h from 50000 ft). - with /velocities/vertical-speed-fpm, the real climb rate (altimeter) varies : One must constantly (every 5-10 minutes) change the vertical speed hold of the autopilot between 10 ft/min and 200 ft/min. This is very annoying because not a constant offset : that could be a lack of sensitivity of /velocities/vertical-speed-fpm (FDM ?). This new IVSI : - Is an emulation with works with environment pressure : a real IVSI works with static pressure (with lag) + accelerometers. It is not forbidden to later upgrade to the real model. - Doesn't require a tuning of the autopilot made with /velocities/vertical-speed-fpm (also tested with 737, 747) : Concorde's autoland works without update.
2005-06-25 08:46:58 +00:00
//
#ifndef __INST_VERTICAL_SPEED_INDICATOR_HXX
#define __INST_VERTICAL_SPEED_INDICATOR_HXX 1
#ifndef __cplusplus
# error This library requires C++
#endif
#include <simgear/props/props.hxx>
#include <simgear/structure/subsystem_mgr.hxx>
class SGInterpTable;
/**
* Model an instantaneous VSI tied to the external pressure.
*
* Input properties:
*
* /instrumentation/inst-vertical-speed-indicator/serviceable
* /environment/pressure-inhg
* /environment/pressure-sea-level-inhg
* /sim/speed-up
* /sim/freeze/master
*
* Output properties:
*
* /instrumentation/inst-vertical-speed-indicator/indicated-speed-fps
* /instrumentation/inst-vertical-speed-indicator/indicated-speed-fpm
*/
class InstVerticalSpeedIndicator : public SGSubsystem
{
public:
InstVerticalSpeedIndicator ( SGPropertyNode *node );
virtual ~InstVerticalSpeedIndicator ();
virtual void init ();
virtual void update (double dt);
private:
The Concorde Maintainer: - replace hardcoded name "inst-vertical-speed-indicator" by the one from the instrumentation config mf: some indentation fixes, remove redundant block
2008-02-07 20:41:00 +00:00
string _name;
int _num;
TJ: Annexed an IVSI (instantaneous ertical speed indicator), which bypasses a limitation with Concorde : - the cruise at Mach 2 must be with a slow climb rate of 50/60 ft/min (2h from 50000 ft). - with /velocities/vertical-speed-fpm, the real climb rate (altimeter) varies : One must constantly (every 5-10 minutes) change the vertical speed hold of the autopilot between 10 ft/min and 200 ft/min. This is very annoying because not a constant offset : that could be a lack of sensitivity of /velocities/vertical-speed-fpm (FDM ?). This new IVSI : - Is an emulation with works with environment pressure : a real IVSI works with static pressure (with lag) + accelerometers. It is not forbidden to later upgrade to the real model. - Doesn't require a tuning of the autopilot made with /velocities/vertical-speed-fpm (also tested with 737, 747) : Concorde's autoland works without update.
2005-06-25 08:46:58 +00:00
double _internal_pressure_inhg;
double _internal_sea_inhg;
double _speed_ft_per_s;
SGPropertyNode_ptr _serviceable_node;
SGPropertyNode_ptr _freeze_node;
SGPropertyNode_ptr _pressure_node;
SGPropertyNode_ptr _sea_node;
SGPropertyNode_ptr _speed_up_node;
SGPropertyNode_ptr _speed_node;
SGPropertyNode_ptr _speed_min_node;
SGInterpTable * _pressure_table;
SGInterpTable * _altitude_table;
};
#endif // __INST_VERTICAL_SPEED_INDICATOR_HXX
Copy permalink