What are the different types of simulation? explain pure-pursuit simulation problem?
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Pure pursuit is a type of pursuit curve used in aerial combat in which an aircraft pursues another aircraft by pointing its nose directly towards it.This is in contrast with lead pursuit, in which the chasing aircraft points ahead of the aircraft it is following (typically used when attempting a gun attack) and lag pursuit, in which the chasing aircraft points behind the aircraft it is following (typically used when attempting a rear-aspect missile attack).Pure Pursuit Problem example
A fighter aircraft sights an enemy bomber and flies directly toward it, in order to catch up and destroy it. We have to determine the attack the attack course of the fighter and how long does the fighter take to catch up with the bomber.
If the target flies along a straight line, the problem can be solved directly with analytic techniques. But if the path of the bomber is curved, the problem can not be solved directly. We can solve such problems using simulation.
We are given following conditions:
Both target and pursuer are flying in the same 2 dimensional plane.
The fighter's speed is constant that is VF.
The target's path is known.
Minimum distance required by the fighter to fire a missile at bomber is 10 units.
If the target is not caught within given time t∘ (here t∘ = 12), the target escapes.
Initial coordinates of the pursuer (fighter) are known.
We will choose our coordinate system such that, initially target will be lying on the X axis and pursuer will be lying on Y axis as shown in the figure below.
The fighter looks at the target at instant t, aligns its velocity vector with line of sight (i.e. points itself towards the target). It continues to fly in that direction for one unit of time (up to t+1). At (t+1) it looks at the target again and realigns itself.
The distance between the 2 (dist[t]) at a given instant of time can be calculated by using distance formula.
A fighter aircraft sights an enemy bomber and flies directly toward it, in order to catch up and destroy it. We have to determine the attack the attack course of the fighter and how long does the fighter take to catch up with the bomber.
If the target flies along a straight line, the problem can be solved directly with analytic techniques. But if the path of the bomber is curved, the problem can not be solved directly. We can solve such problems using simulation.
We are given following conditions:
Both target and pursuer are flying in the same 2 dimensional plane.
The fighter's speed is constant that is VF.
The target's path is known.
Minimum distance required by the fighter to fire a missile at bomber is 10 units.
If the target is not caught within given time t∘ (here t∘ = 12), the target escapes.
Initial coordinates of the pursuer (fighter) are known.
We will choose our coordinate system such that, initially target will be lying on the X axis and pursuer will be lying on Y axis as shown in the figure below.
The fighter looks at the target at instant t, aligns its velocity vector with line of sight (i.e. points itself towards the target). It continues to fly in that direction for one unit of time (up to t+1). At (t+1) it looks at the target again and realigns itself.
The distance between the 2 (dist[t]) at a given instant of time can be calculated by using distance formula.
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The different types of stimulation and the Pure-Pursuit Problem is explained below.
Explanation:
Different types of stimulation are given below:
- Electrical muscle stimulation (EMS)
- Russian electrical stimulation. ( RES)
- Neuromuscular electrical stimulation (NMES)
- Functional electrical stimulation (FES)
- Transcutaneous electrical nerve stimulation (TENS)
Pure-Pursuit Stimulation Problem can be decribed as:
- Pure pursuit is a form of chase curve used in air combat in which an airplane seeks another airplane by specifically pointing its antenna to it.
- This is in contrast to the pursuit of lead.
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