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Path Planning Navigation

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Path planning is the foundation of autonomous systems. Given a start, goal, and obstacles (walls, furniture, other robots), algorithm computes collision-free path. Techniques: A*, Dijkstra, RRT, D*. Mastery takes 8-10 weeks. Only roboticists and autonomous vehicle teams need this. Those who master it command premium roles at Boston Dynamics, Waymo, Tesla. Skill is rare; fewer than 1% of engineers understand path planning.

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Path planning is the algorithmic problem: given a start position, goal position, and obstacles (walls, furniture, other robots), compute a collision-free path. Algorithms explore the environment, building a graph of feasible moves, then finding the shortest or fastest path to goal. Common algorithms:

🔧 ZANA NA MAZINGIRA
ROS (Robot Operating System)Python for algorithm developmentSimulation (Gazebo, CARLA)A*, Dijkstra, RRT implementationsGraph librariesVisualization toolsCollision detection librariesReal robot platforms

💰 Mshahara kwa kanda

KandaMdogoKatiMkuu
🇺🇸USA$100k$170k$270k
🇬🇧UK£62k£105k£165k
🇪🇺EU€68k€115k€180k
🇨🇦CANADAC$105kC$180kC$290k

🎓 Vyeti

ROS Courses (ROSfoundation)→Autonomous Robots Specialization (Coursera)→Motion Planning (MIT OpenCourseWare)→

🎯 Kazi zinazotumia Path Planning Navigation

Autonomous Vehicle Engineer
Drone Systems Engineer
Intelligence Analyst

❓ Maswali Yanayoulizwa Mara Kwa Mara

▶What's the difference between A* and Dijkstra?
Dijkstra = explores all directions equally, slow. A* = uses heuristic (estimated distance to goal) to explore toward goal first, faster. A* is Dijkstra with a smart heuristic. For pathfinding, A* is usually better.
▶When should I use RRT vs. A*?
A* = discrete grids (pixels, roadmap nodes). RRT = high-dimensional spaces (robot arm with 6 joints). A* is simpler, faster for 2D navigation. RRT is powerful for complex movements. Choose based on your environment.
▶How do I handle dynamic obstacles (moving people, other robots)?
Static planners (A*, RRT) plan once, robot executes. Moving obstacles = replan continuously (re-run algorithm every 1-10s as obstacles move). Called dynamic or reactive planning. More expensive computationally.
▶What's a roadmap and why use it?
Roadmap = precomputed graph of collision-free paths in environment (like a map). Query: start → find nearest node on roadmap → traverse to goal node → execute. Much faster than replanning from scratch. Offline computation, online lookup.
▶How do I ensure a path is optimal (shortest)?
A* with good heuristic = finds optimal path (if exists). RRT ≠ optimal; it just finds *a* path. If you need shortest path, use A* or Dijkstra. If you need *any* path fast, use RRT.

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