steering_limiter.hpp

// Copyright 2022 Pixel Robotics.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
/*
 * Author: Tony Najjar
 */
 
#ifndef TRICYCLE_CONTROLLER__STEERING_LIMITER_HPP_
#define TRICYCLE_CONTROLLER__STEERING_LIMITER_HPP_
 
#include <cmath>
 
namespace tricycle_controller
{
class SteeringLimiter
{
public:
  SteeringLimiter(
    double min_position = NAN, double max_position = NAN, double min_velocity = NAN,
    double max_velocity = NAN, double min_acceleration = NAN, double max_acceleration = NAN);
 
  double limit(double & p, double p0, double p1, double dt);
 
  double limit_position(double & p);
 
  double limit_velocity(double & p, double p0, double dt);
 
  double limit_acceleration(double & p, double p0, double p1, double dt);
 
private:
  // Position limits:
  double min_position_;
  double max_position_;
 
  // Velocity limits:
  double min_velocity_;
  double max_velocity_;
 
  // Acceleration limits:
  double min_acceleration_;
  double max_acceleration_;
};
 
}  // namespace tricycle_controller
 
#endif  // TRICYCLE_CONTROLLER__STEERING_LIMITER_HPP_