H. W. Stone. Mars pathfinder microrover: A low-cost, low-power spacecraft. In Proceedings of the 1996.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....go back to select modes for idle intervals again. Our algorithm applies heuristic ordering by selecting modes from lowest power values. This way we are able to find solutions with less total energy efficiently. 5 Experimental Results We apply our algorithm to an example based on the Mars rover [1]. The rover travels on the surface of Mars to perform scientific experiments and shoot images. Its resources consists of a camera (CAM) scientific devices (SCI) a radio frequency modem (RF) a microprocessor (PPC) a hazard detector (HAZ) driving motors (DRV) and steering motors (STR) CAM ....

H. Stone. Mars pathfinder microrover: A low-cost, low-power spacecraft. In Proc. the 1996.

....up by 49 with a 24 energy reduction. These two alternative designs with different energy performance tradeoffs are discovered by our system level pipelining technique. They cannot be extracted otherwise by the existing techniques. We apply our algorithm to an example based on the Mars rover [46]. The rover travels on the surface of Mars to perform scientific experiments and shoot images. Its resources consists of a camera (CAM) scientific devices (SCI) a radio frequency modem (RF) a microprocessor (PPC) a hazard detector (HAZ) driven motors (DRV) and steering motors (STR) CAM takes ....

H. Stone. Mars pathfinder microrover: A low-cost, low-power spacecraft. In Proc. the 1996.

....the remote cell and the operator s current commands via a Taylor expansion. A typical framework makes use of a Kalman filter (Hirzinger et al. 9] Perhaps the most impressive example of a space teleoperation system where the slave s control loop is closed is with the robot navigator Sojourner [10] during NASA s Pathfinder Mission to Mars in 1997. Operators based on earth used telemetry information sent by the lander to gain a realistic impression of the terrain surrounding the robot. A course was then plotted and was sent to the robot for the robot to complete during that day using its own ....

....0 0.5 1 1.5 2 2.5 0 0.05 0.1 0.15 0.2 0 0.5 1 1.5 2 2.5 0 0.05 0.1 = 0.005 = 0.02 0 0.5 1 1.5 2 2.5 0 0.05 0.1 0.15 0.2 (c) d) Figure 5.11: The MEC trajectories with different weighting # and sensor variance # i . a) position and (b) velocity for # = [10 ] with constant # i = 0.01m. c) position and (d) velocity trajectories for # i = 0.005, 0.01, 0.015, 0.02]m with # = 1000. The command velocity is x e = 0.2m s and the environment located at x i = 0.15m. Impact Control using Vision The impact controller was first calibrated by estimating the ....

H.W. Stone. Mars pathfinder microrover: A low-cost, low-power spacecraft. In Proc. AIAA Forum on Advanced Developments in Space Robotics, Madison, WI., 1996.

....to be informed of all these changes our internal maps update themselves (although confusion can occur when revisiting a city after many years) 1.1 Autonomous Navigation 4 1.1. 3 The Mars Rover Perhaps many people s idea of the state of the art in robot navigation is the rover Sojourner [89] placed on Mars by the NASA Pathfinder Mission on 4th July 1997. As such, it is worth examining its operation to see what capabilities it had and which problems it was able to solve. The capsule descending onto Mars consisted of a lander module containing and cushioning the rover. Once on the ....

H. W. Stone. Mars pathfinder microrover: A low-cost, low-power spacecraft. In Proceedings of the 1996 AIAA Forum on Advanced Developments in Space Robotics, Madison, WI., 1996.

....and actuators, can perform certain assigned tasks without the supervision of an operator. The level of autonomy is the degree to which a robot can respond to environmental changes in a logical fashion as it was being controlled by an operator. Mobile autonomous robots such as the Mars Rover [8] and Autonomous Underwater Vehicles [24] are two examples of robots in this subcategory. There are two major distinct methodologies for controlling a practical autonomous robot: highly structured hierarchical [3] control systems and distributed layered control systems based on the concept of ....

H. W. Stone (1996). Mars Pathfinder Microrover: A Low-Cost, Low-Powered Spacecraft. In: Proceedings of the 1996 AIAA Forum on Advanced Developments in Space Robotics, madison, WI. 88

....the Internet by more than 600 virtual visitors. 1 Introduction A well known application area for robots, and especially tele operated autonomous robots, is the exploration of dangerous environments or of environments whose direct observation is in some way difficult. The mars pathfinder mission [Sto96] is perhaps the most popular example of this type of application. However, we are concerned with a different research direction in autonomous robotics, namely the design of service robot systems. Such are robots capable of carrying out tasks like delivery jobs autonomously in ordinary ....

....and the tourguide interface exist and these will also be explained. 2 Related Work So far, research on tele operated autonomous robots has focused mainly on robots exploring dangerous environments [HHF 95, FPW 95] and on the design of autonomous robot systems for space missions [HBJJ94, Sto96] In contrast to RTL, these systems use leased lines and satellite links for communication. High bandwidth is permanently available and transmission delays are nearly constant. Visualisation is carried out mainly by video transmission and is supported by 3D computer graphics to bridge the very ....

H. W. Stone. Mars pathfinder microrover: A low-cost, low-power spacecraft. In Proceedings of the 1996 AIAA Forum on Advanced Developments in Space Robotics, Madison,WI, August 1996.

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H. W. Stone. Mars pathfinder microrover: A low-cost, low-power spacecraft. In Proceedings of the 1996.

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H. W. Stone. Mars pathfinder microrover: A low-cost, low-power spacecraft. In Proceedings of the 1996.

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