Zero Thrust adjustment:Almost hopeless!

I've talked about the negative effects of thrust angles in passenger cars and the need to eliminate them, but today he talks about the possibilities.

If you operate the steering even a little while going straight, the car will change the direction of driving. The driver should know the direction change very sensitively. Then, is it the same with a forklift with rear wheel steering? The same thing will happen physically.

Let's assume a state where both front wheel steering and rear wheel steering functions are provided. When the rear wheels are fixed at the center position that matches the traveling direction, the front wheels can also be kept straight at the steering center position.

If you steer the rear wheel slightly to either side and shift it from the center, the car will start turning, and if he tries to keep going straight in this state, the front wheel must be in phase and steered at the same angle as the rear wheel.

The direction of the left-right vector sum of the rear wheels and the deviation angle from the center of the car may be called as the thrust angle, or the vector sum corrected by the front wheels.

If you write so far, it is easy to think that you should correct the deviation angle on the rear wheel, but in reality it is not easy because there are many uncertainties.

When the arc drawn by the thrust angle and the radius of the curve match when turning, a dead zone occurs in the steering pressure. At this time, the car turns along the curve even if you take your hand off the steering wheel.

Since the load moves back and forth when starting and stopping, he changes the amount of correction for thrust.

When the forward weighted movement is stopped, it will be over if it starts at the steering position as it is, and it will be undercut and it will be necessary to increase the number of turns. The steering action is complicated due to the action, and it feels uncomfortable. Even if the car is equipped with EPS, the basic geometric and physical deviation cannot be corrected.

It is an unreasonable consultation as if he is trying to correct the roll movement habit that should be corrected by the aileron tab on the airplane from the yaw movement by force on the rudder tab. Unpredictable bad habit appears when the driving situation changes.