And?
I'm doing quit the same as you did so far.
Henri K.
You have done
NOTHING as I have done so far. Not even 1/10th close.
Let us look at one of your source...
In the abstract:
The proportional navigation was adopted as the terminal guidance law.
What exactly are these: 'proportional navigation' and 'terminal guidance law'?
Most people when they see the word 'law' they think of things associated with criminality such as murder and jaywalking or of civil law like buying a house or a car. But what is this 'terminal guidance law'?
I see nothing --
NOTHING -- in your post that you explained to the readers what is this 'terminal guidance law'.
I see nothing --
NOTHING -- remotely close to an example, close to home and person, that a reader can say to himself: 'Ah...Now I get it.'
So who would take you seriously as a 'source' for things technical and relating to the subject under discussion? The Chinese members here.
Intelligent readers would not.
Now you will learn something from me...
If I have a meter long stick, that meter long stick is a law. A physical law. I cannot reach more than one meter. Likewise, your arm's length is a law. You cannot reach beyond your arm's length. If your car's steering wheel have 2.5 turns lock-to-lock, that is a law created by the auto maker. If your care have four tires/wheels, that is a law created by the auto maker. If the iPhone have a battery of 1440 mAh (milliamp hour), that is a law created by Apple applicable to the iPhone and to a specific iteration. Not applicable to Motorola or Samsung or HTC.
Contract law says you pay X/month for your mortgage. If you violate that law by not paying, you will pay more in some ways. On the other hand, if you pay X+/month, you are also violating the law but in this case nothing will happen to you. If you leap off a building, you will fall. Gravity is a law of nature that cannot be defied. Believe it or not, flying is not disobeying the law of gravity. It is countering the law of gravity with a more powerful force.
In other words, a law is a set of rules that either cannot be violated or cannot be violated at all.
So what exactly is this navigation law as in 'proportional navigation'?
In order to understand, you must first understand the concept of 'navigation' in the first place.
Verb
Plan and direct the route or course of a ship, aircraft, or other form of transportation, esp. by using instruments or maps.
Travel on a desired course after planning a route: "he taught them how to navigate across the oceans".
Navigation is not steerage.
Navigation is conceptual. Steerage is physical.
Navigation is about looking (Sensor) ahead when entering a roundabout, watching (Sensor) for other cars already in the roundabout and seeking to enter the roundabout and how to avoid colliding with them.
Steerage is about the mechanical contraptions that will allow you to avoid those other cars.
Sensor + Navigation = Guidance => Steerage
Here is the proper definition of 'guidance'...
Noun
Advice or information aimed at resolving a problem or difficulty, esp. as given by someone in authority.
The directing of the motion or position of something, esp. a missile.
Notice the highlighted. Advice, data, or instructions are conceptual.
We take a 'sensor', a method that is aware of the external environment and provide feedback, we coupled the information to a planning committee (navigation), then we transmit the advice to a control method that is capable of reorienting the body (steerage).
Sensor have its own laws. Your eyes operate in the visual spectrum and that is an inviolable law. Navigation have its own laws, partially created by Sensor inputs, partially created by physical construction, such as a resistor with a maximum ohm rating, for example. Steerage have its own laws such as one meter length push-pull rod, or aerodynamic deflectors, or gas reaction thrusters.
So what happens when we put them all together? We have something like this that is human readable...
Airbus Flight Control Laws
Everything I said is applicable to the DF-21D. The word 'applicable' does not mean the DF-21D have those things, but only if the DF-21D have the necessary hardware in order to exploit flight control laws.
So:
-
IF the DF-21D have reaction gas thrusters or aerodynamic vanes, then it does have steerage.
-
IF the DF-21D have a sensor then logically it must have navigation.
All together, the DF-21D have 'guidance'. But only
IF the DF-21D have those things I presented.
You provided not even 1/10th the explanation of the foundational principles in the abstract of
YOUR source. How pathetic is it for your credibility that your debating opponent have a superior understanding of your source than you do?
I do not expect the readers to understand the complexity of navigation and flight control laws, but I have faith that intelligent readers will take what I explained, do their own research, and come to the conclusion that you and your Chinese friends are clueless about the subject they are blabbering about.