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In order to reduce the structural vibrations of a mechanical system used in aerospace, a new sketch of eddy current damper (ECD), consisting of one cylindrical permanent magnet, two ring-shape copper plates, one axial transmission shaft and electromagnetic shield, is proposed. Three dimensional (3D) electromagnetic transient analysis on damping performance of the proposed damper is conducted by ANSYS to determine the dimensions of the designed damper. And a series of damping tests for the damper subjected to sinusoid excitations with amplitudes of around 0.1 and 1 mm are respectively carried out under frequencies ranging from 1 to 50 Hz. The experimental results validate that the 3D transient analysis method with ANSYS is effective to guide the design of ECDs. Moreover, it is found that the proposed ECD has high damping, which is significantly superior to the one-plate ECD with the same structure and dimensions.

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China’s Mars rover Zhurong successfully landed on Mars on 15th May 2021, and it is currently conducting an exploration mission on the Red Planet. This paper develops slip estimation models for the Mars rover Zhurong based on the data drive approach. Data were obtained by Zhurong’s validator ground indoor tests, and the test site was equipped with a low-gravity simulation device and simulated Mars soil to simulate the Mars conditions as much as possible. The obtained slip models trained by BP and GA-BP algorithms were applied to estimate Zhurong’s longitudinal (slip_x) and lateral slip (slip_y) on Mars, and the slip estimation values were used to display Zhurong’s actual driving path. The analyzed results prove that the GA-BP slip models perform better than the BP models, and can both be applied for correcting Zhurong’s path. The proposed models have high potential in guiding the path planning and monitoring of the slip for the Mars rover Zhurong.