Hsieh, Mong-ying A

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2004 - 200912020 - 20251
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  • Publication
    Constructing Radio Signal Strength Maps with Multiple Robots
    (2004-04-26) Hsieh, Mong-ying A; Kumar, R. Vijay; Taylor, Camillo J
    Communication is essential for coordination in most cooperative control and sensing paradigms. In this paper, we investigate the construction of a map of radio signal strength that can be used to plan multirobot tasks and also serve as useful perceptual information. We show how nominal models of an urban environment, such as those obtained by aerial surveillance, can be used to generate strategies for exploration and present preliminary experimental results with our multi-robot testbed.
  • Publication
    Effect of Jet Coordination on Underwater Propulsion with the Multi-Robot SALP System
    (2025-04) Yang, Zhiyuan; Zhang, Yipeng; Herbert, Matthew; Hsieh, Mong-ying A; Sung, Cynthia
    Salps, marine invertebrates known for their collective swimming through coordinated jet propulsion, offer a unique model for efficient underwater movement. Inspired by this biological system, we develop the SALP (Salp-inspired Approach to Low-energy Propulsion) robot, a soft underwater robot that swims via jet propulsion similarly to a biological salp. The SALPs can be physically connected into SALP chains and coordinate their jets to achieve various propulsion modes. In our experiments, we compare the swimming performance of the individual SALP with the two-SALP system, focusing on power, acceleration, velocity, and energy efficiency. Results indicate that two SALPs swimming synchronously exhibit a 9.0% increase in steady-state velocity and a 16.6% improvement in transient acceleration compared to a single SALP. Additionally, our analysis of swimming efficiency implies that asynchronous swimming is potentially more energy efficient than the synchronous mode, as reflected by a decrease in the cost of transport (COT).