A Ph.D from MIT analyses the unmanned drone spying over Cambodia

From : aerospace engineering Ph.D (MIT)

Re: Hun Sen called unmanned drone spying an act of terrorism while calling for U.S and Australian assistance in investigation

Unmanned aerial vehicles (UAVs) represent the fastest growing and the most dynamic growth segment within the aerospace industry. Although now unmanned aerial vehicles are used mostly in military applications (intelligence, surveillance, and reconnaissance missions; and combat operations—strike missions, suppression and/or destruction of the enemy and its facilities).

Autonomy is replacing the human operator in many applications. Examples involve military systems where there is some element of danger to the human operator, civilian systems when handling hazardous materials, as well as monotonous operations such as surveillance, reconnaissance and dull, dirty and dangerous missions, such as operations in chemical and biological environments and in environmental monitoring. The replacement of the human operator in such systems necessitates the development of autonomous systems techniques. Such autonomous systems operate in many environments, such as in the air, in and under water, in space or on the land.

Path planning is a complex problem, which involves meeting the physical constraints of the unmanned aerial vehicles (UAVs), constraints from the operating environment and other operational requirements. The foremost constraint to be met is that the paths must be flyable. Flyable paths are those that meet the kinematic constraints of the UAV. Satisfying this constraint ensures that the motion of the UAV stays within the maximum bounds on manoeuvre curvature. The safety of the path is measured by the ability of the path to avoid threats, obstacles and other UAVs. The path must maintain collision avoidance with other friendly UAVs and also must be flexible enough to avoid environmental obstacles and threats. Also, additional constraints – such as generating shortest paths, and minimum fuel and energy consumption paths – can be included for better performance and efficiency of the mission.
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Anonymous said...

From spy dog to human spy now Thailand went a little bit High tech but not so well designed, Thailand still behind from the rest of the world in technology. From the picture of the wreckage Thailand wanted to design and copy of stealth technology (B2) but don’t know how .

To avoid detection from radar by using stealth technology,Thailand should first understand how radar work, once the principles of radar return are understood, the next step is to determine the overall effect of signature reduction, and how it delivers benefits for tactical mission planning. Radar cross section varies with aspect and with the frequency of the radar attempting to track it.

Both concepts have important implications for netting the tactical benefits of stealth. making a good stealth airplane is a little bit like making a bad transmitting antenna. The sender would receive so much less radiated power that the aircraft’s return signal would fall below the radar’s detection threshold until the aircraft was very close to the radar.

However,lowering radar cross section requires a trade-off between ideal low observable features and aerodynamic performance needed for a aircraft. The goal of low observable aircraft in a tactical environment is to deny timely flow of information about the aircraft’s position, elevation and heading to the enemy’s integrated air defense system. The basic goal of this process is to reduce the range at which different radars in the air defense system detect and track the aircraft.

Radar-absorbing materials and geometry of the airplane play vital roles in stealth technology (Radar-absorbing materials (RAM) are used to attenuate radar waves), it is a good comedy when Thailand try to make or say something that Thailand merely know how and understood the meaning and the fundamental of it.