关键词: 制动舒适性；俯仰角；建模与控制

Abstract: The main factor that affects the comfort of automobile braking is the pitching vibration of automobile under braking condition, and the pitching of automobile braking is affected by the suspension and braking force. Through the MATLAB software establishes the automobile braking pitch model, simulates the automobile output under the braking input, and simplifies the model reasonably, finds the mathematical relationship between the pitch angle and the braking force, and reduces the braking force to reduce the pitch vibration on the premise of ensuring the braking performance in this paper. According to the analysis of simulation results, the braking pitch is divided into three periods, before and in the middle period of braking, the distribution coefficient of braking force is adjusted to reduce the pitching angle, in the later period of braking, the linear quadratic regulator (LQR) wireless time state adjuster is designed to find a way to adjust the braking force, optimize the pitching angle of the automobile, eliminate the rebound phenomenon of braking, and improve the comfort of the automobile under the braking condition, making this paper has practical engineering significance.

Key words: Braking comfort; Pitch angle; Modeling and control