NASA just parked its Insight Lander on Mars. Yes, Mars. This is a big deal because few missions missions do not make it. It is no wonder that I am very excited about the mission of Mars.
For this special mission, the lender, protected by a heat shield, uses the mars to slow down the atmosphere. After that, deploying a high-speed parachute to further reduce the speed. After all, the lender separated from the parachute and traveled to the last part of the journey to control its origin using a rocket.
Now for the real question, however: are you charged for insight landing? If you did a manual landing, would the robot survive? Let's find out.
Before entering the game, let's go to the basic physics. To keep this manageable, I focus on the rocket-powered landing part of this mission. During the lineage of spacecraft, basically two forces work on it. The gravitational force and the power above are below the spacecraft rockets. Gravity force is only based on a local gravity field and a set of spacecraft. On Mars, this gravitational field is slightly lower than Earth, with a price of 3.71 liters per new (compared to 9.8 n / kg on earth). As long as you are close to the surface of Mars, this gravitational field remains constant in strength.
Although the gravitational field is constant, there is no mass of spacecraft. Because he uses his rockets, he loses the mass (because the rocket engine works by firing fuel). This means that the gravitational force also makes a slight difference – but of course the entire spacecraft is not fueled. The total amount of fuel is only about 16 percent of the total quantity.
The speed of the changing mass of the spacecraft also affects its speed. According to the theory of speed, the total force (gravitational plus rocket) is the same as the rate of change in speed. However, acceleration is defined as mass and speed production. Therefore, the continuous net force on the spacecraft means that the momentum changes on the non-continuous rate after which the mass is changing. Yes, it becomes difficult, it becomes difficult
Well, let's come into the game. Here's how it works.
- Start the entire fuel from the spacecraft and 50 meters above the ground.
- You adjust the rocket thrust.
- The rocket depends on the amount of change in the momentum.
- Changes in fuel sets are also based on the quantity of rockets.
- You want the rocket to reach the ground while traveling less than 1 meter (it must also be slow).
Just this Click "Run" to get started, and then adjust the slider at the bottom for rocket thrust. The program also shows vertical momentum and the number of fuel you left. This is essentially a one-dimensional version of the classic video game-Lunar Lander.
It seems that it is more difficult. The problem is that we often think of a direct connection between force and motion that big power moves it faster. Here! Not so fast Indeed, more force brings more change in speed. Just as the landlord goes down, it needs to increase the force to prevent it from happening. But if you give it a lot of emphasis, the lander gradually progresses slowly and slowly. It's not landing – it's going to stop.
Now for some homework. See if you can get the lender at least in the ground (safely). Now try an algorithm for thrust intensity (no user-controlled), which makes short-term landing. It will be fun
More great wire stories