线控楔形制动系统设计理论与控制方法研究

The idea of electronic wedge brake created by the German Aerospace Center(DLR), the key point is: the kinetic energy of the object will be translated as brake force by the wedge, thereby reducing the power of motor as well as size and weight while improving braking safety. The tests show that the motor power and the energy consumption of braking to reduce by about 80% and shorten the braking distance by around 15%. The electronic wedge brake can be applied to short-distance landing aircraft, high-speed trains and automobiles, has broad application prospects and great research value, is one of the priority brake of the next generation of braking technology. This project focus on electronic wedge brake, firstly the multibody-system-model will be built. Based on the model the buindling of brake force will be analysed. Considering the factors affecting of the braking force, based on the control strategy of wedge position, the wedge angle can be optimised, and the estimation algorithm of braking force can be built. Considering the speed, acceleration and friction coefficient, the control strategy in optimal area of electronic wedge brake can be set up, lastly the estimation algorithms of braking force and the optimal control strategy will be tested by the experiment, and lay the theoretical foundation for the development of electronic wedge brake.

线控楔形制动系统的设计思想起源于德国宇航中心，该制动思想的核心在于：巧妙利用楔形机构，将被制动物体自身的动能转化为制动力，对其本身进行制动，从而降低执行电机的功率以及体积和自重，同时提高制动安全性。测试表明，执行电机的功率和制动能耗降低了80% 左右，制动距离缩短了 15% 左右。线控楔形制动系统可应用于短距离起降飞行器、高速列车和汽车等，具有广阔的应用前景，极具研究价值和意义，是下一代制动技术的优先发展方向之一。本课题以线控楔形制动系统为研究对象，建立线控楔形制动机构的动力学模型，在此基础上仿真分析制动力的形成机理，以及影响制动力大小的因素，并结合现有的楔形块位置控制策略，优化楔形角，并建立一套制动力估算算法，并综合考虑速度、加速度和摩擦系数的影响，制定线控楔形制动系统的最佳工作区域控制策略，并对制动力估算算法和综合控制策略进行实验验证，为研发线控楔形制动系统奠定理论基础。