The Perseverance rover has six wheels, each with its own individual motor.When driving over the uneven Martian terrain, the suspension system maintains a relatively constant weight on each of the rover's wheels. Curiosity’s large size is an advantage on Mars because it allows the rover to roll over obstacles up to 25-inches (65 cm) high. The new and improved tire treads, or grousers, were designed by NASA-JPL engineers to be a series of slightly S-curved lines. This steering capability allows the vehicle to turn in place, a full 360 degrees. Enable the rover to drive over knee-high rocks as tall as 40-centimeters (15.75-inches).
The suspension system is how the wheels are connected to and interact with the rover body.The term "bogie" comes from old railroad systems. The Mars 2020 Perseverance Rover Wheels and Legs. The Mars Curiosity Rover Wheels and Legs. The four-wheel steering also allows the rover to swerve and curve, making arching turns. The slow pace is energy efficient consuming less than 200-watts. Of most importance when creating a suspension system is how to prevent the rover from suddenly and dramatically changing positions while cruising over rocky terrain.
The four-wheel steering also allows the rover to swerve and curve, making arching turns.The design of the suspension system for the wheels is based on heritage from the "rocker-bogie" system on the Pathfinder and Mars Exploration Rover missions.
A bogie is a train undercarriage with six wheels that can swivel to curve along a track.The term "rocker" comes from the design of the differential, which keeps the rover body balanced, enabling it to "rock" up or down depending on the various positions of the multiple wheels. The Mars Science Laboratory has six wheels, each with its own individual motor.The two front and two rear wheels also have individual steering motors (one each). One full turn of the wheels with no slippage drives the rover 1.65 meters (65-inches). When one side of the rover goes up, the differential or rocker in the rover suspension system automatically makes the other side go down to even out the weight load on the six wheels.
For added protection and safe driving, the rover drivers avoid terrains that would cause a tilt of more than 30 degrees.In the case of exploring Mars, however, speed isn't the most relevant quality. It's about the journey and the destinations along the way.
This steering capability allows the vehicle to turn in place, a full 360 degrees.
The two front and two rear wheels also have individual steering motors. The suspension also minimizes rover tilt as it drives, keeping it more stable.The rover's rocker-bogie suspension enables the rover to drive over obstacles (such as rocks) or through depressions that are as large as the rover's wheel (52.5-centimeters, 20.7-inches).
Compare that to a 200-horsepower car engine, consuming nearly 150,000-watts!Made of titanium tubing formed with the same process used to make high-end mountain bike frames. The four-wheel steering also allows the rover to swerve and curve, making arcing turns.
NASA’s Perseverance rover has six wheels made of aluminum designed to drive across sandy, rocky, and hilly Martian terrain. The Mars Science Laboratory has six wheels, each with its own individual motor. Each wheel also has cleats, providing grip for climbing in soft sand and scrambling over rocks.The rover has a top speed on flat hard ground of 4 centimeters per second (a little over 1.5 inches per second).Managed by the Mars Exploration Program and the Jet Propulsion Laboratory for NASA’s Science Mission DirectorateMade of aluminum, with cleats for traction and curved titanium springs for springy supportOne full turn of a wheel with no slippage is about 62 inches (157 centimeters) of drivingCapable of rolling over rocks the size of one of its wheels This steering capability allows the vehicle to turn in place, a full 360 degrees. However, the rover is programmed through its "fault protection limits" in its hazard avoidance software to avoid exceeding tilts of 30 degrees during its traverses.The rover rocker-bogie design allows the rover to go over obstacles (such as rocks) or through holes that are more than a wheel diameter (50 centimeters or about 20 inches) in size.
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