Notes on Underactuated Robotics
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Chapter 2: Robot Dynamics

2 Robot Dynamics

In the field of controlling and training of autonomous stuff, there are three popular ways

  1. reinforcement learning (in quadrupeds)
  2. imitation learning (in manipulation robots)
  3. mechanics optimization (as in ATLAS)

Definition 2.1.1 (Underactuated and Fully-Actuated).

The equation in (†) is said to be fully actuated iff 𝐟2 is of full row rank, or if the rank𝐟=dim𝐪 (since dim𝐪 is the number of rows of 𝐟2). If instead rank𝐟2<dim𝐪, the system is then said to be underactuated.

Definition 2.1.

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Part 2Part 2Part 2 (2.1)(2.1)(2.1)