TAILIEUCHUNG - Feedback.Control.for.a.Path.Following.Robotic.Car Part 10

Tham khảo tài liệu ' part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Patricia Mellodge Chapter 7. Conclusions 80 Finally the lateral controller was implemented in hardware. The vehicle platform was described and the hardware and software architecture detailed. The code for implementing this controller is given in the Appendix. The car described is capable of operating manually and autonomously. In autonomous mode several sensors are utilized including infrared magnetic ultrasound and image based technology. The operation of each sensor type was described and the information received by the processor from each was discussed. The possibility exists to implement many different types of controllers to perform path following or realize other control objectives. The controller performance on the hardware was very good when the correct curvature value was used. It proved to be robust to inherent inaccuracies in the kinematic model. The curvature estimators implemented also performed well. They were able to reliably provide the correct curvature value to the controller under various conditions. The details of the hardware implementation were described as well as differences from the simulation. The image based curvature estimator was not implemented on the car due to hardware limitations with the available processor. Future Work Controller The input scaling controller based on the kinematic model performed very well on the car itself. Major changes to the algorithm are not necessary. However improvements can still be made in the smoothness of operation. Adjusting the algorithm so that driving comfort is the primary objective may result in smoother performance. In addition it is unknown how the controller will perform in conjunction with a longitudinal controller such as adaptive cruise control. The other controller may interfere with the lateral controller and cause instability. It is necessary to integrate the lateral contoller with others so that truely autonomous operation can be achieved. Curvature Estimation While two .

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