J = cost function N = number of impulses NLT = number of low-thrust-independent thrusters p = primer-vector magnitude p = primer vector pm = primer-vector absolute maximum r = relative position vector rj = space collocation of the jth impulse tf = final time tint = intermediate time tj = time instant of the jth impulse application tm = midcourse time corresponding to the primer absolute maximum...

Motivated by the requirement for pinpoint landing in futureMarsmissions, we consider the problemofminimumfuel powered terminal descent to a prescribed landing site. The first-order necessary conditions are derived and interpreted for a point-mass model with throttle and thrust angle control and for rigid-bodymodel with throttle and angular velocity control, clarifying the characteristics of the...

Compared to a variety of mechanical vectoring nozzles, fluidic nozzles possess more research value nowadays. The dual throat nozzle is gradually developing into an outstanding technology handle supersonic and hypersonic aircraft deflections. Three-dimensional, steady, compressible, viscous flows in rectangular are numerically investigated by resolving Reynolds-averaged Navier-Stokes equations s...

Achieving short-distance flight helps improve the efficiency of humanoid robots moving in complex environments (e.g., crossing large obstacles or reaching high places) for rapid emergency missions. This study proposes a design flying robot named Jet-HR2. The has 10 joints driven by brushless motors and harmonic drives locomotion. To overcome challenge stable-attitude takeoff small thrust-to-wei...