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The tests were conducted as affected by wheel load, obstacle height, obstacle geometry, slippage and speed.
Numerical simulations illustrate the performance of the proposed method when the prototype is to surpass an obstacle with different heights with the value of the height obstacle being unknown.
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"This is the first time we show that an electrically powered robot can run and jump over one-foot height obstacles," says Professor Sangbae Kim.
In this mode, robot can move at a relatively high speed and get over low-height obstacle.
The vertical projection detects in-front and head-height obstacles locally while the horizontal projection is used to update obstacle information in a global 2D grid map maintained by the application.
Moreover, the arm can grope environment, so simple but necessary terrain information for locomotion can be estimated, such as the height of obstacle and the terrain tilt angle, like human's groping something in the dark (invisible situation).
Participants judged the height an obstacle before and after stepping over it 50 times.
The weights in the order are: height of obstacles > geometric shape > symmetry = number of obstacles.
Three geometric variables (the ratio of the obstacle height to the height of the duct; the ratio of the transverse pitch to the base length of the obstacle; and the angle of attack) were used as design variables for the optimization.
Perceived obstacle height was calculated for all perceived height trials; toe elevation was calculated for the first and last five obstacle crossing trials.
The 2.5D SBR-Image method is first considered for two-dimensional environment simulated without heights of obstacles by ray tubes.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com