e600cd3d00
- Support interface properties as with JSBSim for easy reuse and parametrization of autopilot components. - Add property-root property to allow changing property root for all relative paths. This allows easy use of multiple instances of the same autopilot component at the same time by specifiying different property root nodes.
69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
// predictor.hxx - predict future values
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//
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// Written by Torsten Dreyer
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// Based heavily on work created by Curtis Olson, started January 2004.
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//
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// Copyright (C) 2004 Curtis L. Olson - http://www.flightgear.org/~curt
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// Copyright (C) 2010 Torsten Dreyer - Torsten (at) t3r (dot) de
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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#ifndef __PREDICTOR_HXX
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#define __PREDICTOR_HXX 1
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "analogcomponent.hxx"
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#include <simgear/props/props.hxx>
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namespace FGXMLAutopilot {
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/**
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* @brief Simple moving average filter converts input value to predicted value "seconds".
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*
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* Smoothing as described by Curt Olson:
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* gain would be valid in the range of 0 - 1.0
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* 1.0 would mean no filtering.
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* 0.0 would mean no input.
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* 0.5 would mean (1 part past value + 1 part current value) / 2
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* 0.1 would mean (9 parts past value + 1 part current value) / 10
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* 0.25 would mean (3 parts past value + 1 part current value) / 4
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*/
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class Predictor : public AnalogComponent {
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private:
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double _last_value;
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double _average;
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InputValueList _seconds;
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InputValueList _filter_gain;
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protected:
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virtual bool configure( SGPropertyNode& cfg_node,
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const std::string& cfg_name,
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SGPropertyNode& prop_root );
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public:
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Predictor();
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~Predictor() {}
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void update( bool firstTime, double dt );
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};
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} // namespace FGXMLAutopilot
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#endif
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