Papers › Policy Learning for Active Target Tracking over Continuous SE(3) Trajectories
Policy Learning for Active Target Tracking over Continuous SE(3) Trajectories
Pengzhi Yang, Shumon Koga, Arash Asgharivaskasi, Nikolay Atanasov
This paper proposes a novel model-based policy gradient algorithm for tracking dynamic targets using a mobile robot, equipped with an onboard sensor with limited field of view. The task is to obtain a continuous control policy for the mobile robot to collect sensor measurements that reduce uncertainty in the target states, measured by the target distribution entropy. We design a neural network control policy with the robot SE(3) pose and the mean vector and information matrix of the joint target distribution as inputs and attention layers to handle variable numbers of targets. We also derive the gradient of the target entropy with respect to the network parameters explicitly, allowing efficient model-based policy gradient optimization.
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