Abstract
Keywords:
hybrid electric brake system (HEBS), eddy current brake (ECB), conventional brake system (CBS), antilock brake system (ABS), traction control system (TCS)
Abstract
A HEBS (Hybrid Electric Brake System) is proposed and designed in this study. It consists of a contact conventional hydraulic brake system (CBS) and a contactless eddy current brake (ECB) system. An ECB generates brake force from the interaction between an eddy current and a magnetic flux. However, it cannot generate sufficient torque at low vehicle speeds. In addition the system heats up as it operates, causing its performance to deteriorate. CBSs also have several problems related to friction, such as heat dissipation, noise, and wear. To overcome these problems, a combined HEBS was designed. With the HEBS, an ABS and TCS controllers are developed, and are controlled with a sliding mode control. In order to evaluate HEBS, a vehicle model is also constructed. The simulation results showed that the HEBS and the designed ABS controller reduced the stopping distance on wet asphalt and snow paved roads. HEBS and TCS controller provide more acceleration performances on a slippery road. The result verifies that ECB systems are effective supplementary retardation equipment, so that an ideal match of the complementary benefits of a CBS and an ECB will increase safety while reducing vehicle operating costs.