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• W4224251177 abstract "In this paper, a novel deep reinforcement learning algorithm based on Proximal Policy Optimization (PPO) is proposed to achieve the fixed point flight control of a quadrotor. The attitude and position information of the quadrotor is directly mapped to the PWM signals of the four rotors through neural network control. To constrain the size of policy updates, a PPO algorithm based on Monte Carlo approximations is proposed to achieve the optimal penalty coefficient. A policy optimization method with a penalized point probability distance can provide the diversity of policy by performing each policy update. The new proxy objective function is introduced into the actor–critic network, which solves the problem of PPO falling into local optimization. Moreover, a compound reward function is presented to accelerate the gradient algorithm along the policy update direction by analyzing various states that the quadrotor may encounter in the flight, which improves the learning efficiency of the network. The simulation tests the generalization ability of the offline policy by changing the wing length and payload of the quadrotor. Compared with the PPO method, the proposed method has higher learning efficiency and better robustness." @default.
• W4224251177 created "2022-04-26" @default.
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• W4224251177 date "2022-04-06" @default.
• W4224251177 modified "2023-09-27" @default.
• W4224251177 title "An Improved Proximal Policy Optimization Method for Low-Level Control of a Quadrotor" @default.
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• W4224251177 doi "https://doi.org/10.3390/act11040105" @default.
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