forked from Archive/PX4-Autopilot
68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/****************************************************************************
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*
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* Copyright (c) 2019 Estimation and Control Library (ECL). All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name ECL nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* Downsamples IMU data to a lower rate such that EKF predicition can happen less frequent
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* @author Kamil Ritz <ka.ritz@hotmail.com>
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*/
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#pragma once
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#include <mathlib/mathlib.h>
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#include <matrix/math.hpp>
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#include "common.h"
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using namespace estimator;
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class ImuDownSampler {
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public:
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explicit ImuDownSampler(float target_dt_sec);
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~ImuDownSampler() = default;
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bool update(const imuSample &imu_sample_new);
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imuSample getDownSampledImuAndTriggerReset() {
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_do_reset = true;
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return _imu_down_sampled;
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}
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private:
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void reset();
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imuSample _imu_down_sampled{};
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Quatf _delta_angle_accumulated{};
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const float _target_dt; // [sec]
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float _imu_collection_time_adj{0.f};
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bool _do_reset{true};
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};
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