This paper presents a nonlinear disturbance observer (NDOB) for active disturbance rejection in the attitude control loop for quadrotors. An optimization framework is developed for tuning the parameter in the NDOB structure, which includes the infinity-norm minimization of the weighted sum of noise-to-output transfer function and load disturbance sensitivity function. Subsequently, the minimization generates an optimal value of the parameter based on the tradeoff between disturbance rejection and noise propagation in the system. The proposed structure is implemented on PIXHAWK, a real-time embedded flight control unit. Simulation tests are carried out on a custom built, high-fidelity simulator providing physically accurate simulations. Furthermore, experimental flight tests are conducted to demonstrate the performance of the proposed approach. The system is injected with step, sinusoidal, and square wave disturbances, and the corresponding system tracking performance is recorded. Experimental results show that the proposed algorithm attenuates the disturbances better compared to just a baseline controller implementation. The proposed algorithm is computationally cheap, an active disturbance rejection technique and robust to exogenous disturbances.
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August 2019
Research-Article
Robust Attitude Control for Quadrotors Based on Parameter Optimization of a Nonlinear Disturbance Observer
Shatadal Mishra,
Shatadal Mishra
Robotics and Intelligent Systems Laboratory,
The Polytechnic School,
Arizona State University,
Mesa, AZ 85212
e-mail: smishr13@asu.edu
The Polytechnic School,
Arizona State University,
Mesa, AZ 85212
e-mail: smishr13@asu.edu
Search for other works by this author on:
Wenlong Zhang
Wenlong Zhang
Robotics and Intelligent Systems Laboratory,
The Polytechnic School,
Arizona State University,
Mesa, AZ 85212
e-mail: wenlong.zhang@asu.edu
The Polytechnic School,
Arizona State University,
Mesa, AZ 85212
e-mail: wenlong.zhang@asu.edu
1Corresponding author.
Search for other works by this author on:
Shatadal Mishra
Robotics and Intelligent Systems Laboratory,
The Polytechnic School,
Arizona State University,
Mesa, AZ 85212
e-mail: smishr13@asu.edu
The Polytechnic School,
Arizona State University,
Mesa, AZ 85212
e-mail: smishr13@asu.edu
Todd Rakstad
Wenlong Zhang
Robotics and Intelligent Systems Laboratory,
The Polytechnic School,
Arizona State University,
Mesa, AZ 85212
e-mail: wenlong.zhang@asu.edu
The Polytechnic School,
Arizona State University,
Mesa, AZ 85212
e-mail: wenlong.zhang@asu.edu
1Corresponding author.
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT,AND CONTROL. Manuscript received December 8, 2017; final manuscript received January 30, 2019; published online March 25, 2019. Assoc. Editor: Yongchun Fang.
J. Dyn. Sys., Meas., Control. Aug 2019, 141(8): 081003 (12 pages)
Published Online: March 25, 2019
Article history
Received:
December 8, 2017
Revised:
January 30, 2019
Citation
Mishra, S., Rakstad, T., and Zhang, W. (March 25, 2019). "Robust Attitude Control for Quadrotors Based on Parameter Optimization of a Nonlinear Disturbance Observer." ASME. J. Dyn. Sys., Meas., Control. August 2019; 141(8): 081003. https://doi.org/10.1115/1.4042741
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