I. Analysis of the movement trajectory of the front and rear wheels when the car is turning at right angles As we all know, when the front and rear wheels of a car move in the same direction, the car makes a linear movement; when the front and rear wheels of the car move in different directions, a centripetal force is generated to force the car to make curved movements; when the front and rear wheels of the car move in different directions and the direction deviation is maintained Without change, the resulting centripetal force will remain unchanged. At this time, the car will make a circular motion. At this time, what is the radius of the circle? Is it the same circle before or after the rotation? Set the angle of the front wheel of the car to remain unchanged. The distance between the front and rear wheels is BC = L. The car turns along the direction of the corner when the car turns and the rear wheel follows The direction of the car body turns. The trajectories of the front and rear wheels are shown as concentric circles. Through simple analysis, it can be concluded that: 1 When the car is making a circular motion, the front and rear trajectories are not the same circle, but are concentric circles with different radii. The trajectory radius (r) of the rear wheel is smaller than the trajectory radius (R) of the front wheel. 2 The radius of motion of the car is determined by the steering angle of the front wheel and the distance L between the two wheels of the front and rear wheels. When L is constant, the smaller the corner, the greater the radius. 3 When the car makes a right-angle turn, as long as the distance between the right-angle vertex (D) and the center of circle (A) is smaller than the radius of motion of the rear wheel, that is, AD 2, the above conclusion is applied in driving a car. Now the car front and rear wheel axle distance is generally 2 5m (driver position from the front axle distance is generally 1 2m, distance from the rear axle is generally 1 3m), the front wheel shaft from the front of the car is 0. 8m, rear wheel shaft from the rear 1 2m. The maximum front-wheel steering angle is 30 degrees. When the car is turning at a maximum angle of 30 degrees, the radius of front wheel rotation is R=25/SIN30=5M, and the radius of rotation of the rear wheel is r=25 ctn30=4 4m1. When the car is turning right angle, the reference volume There are mainly two: (1) The distance from the car to the curb is set to K; (2) The distance from the front vertex to the vertex is set to N, then the distance from the center of rotation A to the vertex D is AD = (4 4- k ) 2 + ( 2 5 + N) 2. To make the car not hit the right-angled side when turning, AD (2) should be used when the distance from the car to the roadside K = 1m, N (3) when the car to the side of the road When K = 1 5m, N 2 is the distance between the car and the curb when the car is moving to a right-angled corner. The reference distance is also set as K, (2) The distance between the rear wheel and the vertices is set to N. Then, rotate the distance A from the center A to the corner vertex D to AD=( 4 4- k )2 + N 2 . To make the car not hit the right angle when turning, AD (2) must be used when the distance from the car to the roadside is K = 1m. , N (3) When the distance from the car to the roadside K = 1 5m, N Nickel Fluoride 2836999000,45 Alkaline Nickel Carbonate,Nickel Fluoride 98,Fine Chemicals Nickel Shaoxing Yingke Metal Extracting Co., Ltd , https://www.nickelsalt.com