Web Page Layout:
Develop realistic individual control performance requirements of electro-mechanical brake systems for future system level drive-by-wire vehicle control applications,
Develop complete and accurate models of electro-mechanical brake systems for realistic simulations, and system performance oriented control models for controller designs,
Develop effective nonlinear adaptive robust observers for accurate clamping force estimation and low-cost implementation,
Develop performance oriented adaptive robust controllers to meet the stringent individual brake performance requirements while lowering the accuracy demands on individual hardware components to reduce overall manufacturing cost of brake systems, and
Test clamping force observer and control algorithms through realistic simulations and realistic experimental set-up with possible novel hardware re-design
Motivations and Control Issues:
The increasing demand for driving safety makes the drive-by-wire the only option for future vehicles. Drive-by-wire provides the hardware possible of individually controlling each wheel with a response time much shorter than human drivers. Thus, through intelligent and precise coordinated control of four individual brake systems, traditionally unavoidable accidents such as skidding due to the loss of grasping of a particular wheel can be prevented. The project is to investigate the specific control performance requirements that individual brake systems should satisfy (e.g., the minimum response speed) in order to accomplish those desirable vehicle level functionalities as well as feasibility of meeting these control performance requirements using commercially available products (i.e., motors, gears, …) and advanced control strategies.
The laboratory facilities for the electro-mechanical brake systems are located at the Ray W. Herrick Laboratories of the School of Mechanical Engineering.
Experimental Demonstrations and Results: