Robust speed synchronization control for clutchless automated manual transmission systems in electric vehicles

Abstract

This paper is concerned with the speed synchronization optimal controller design problem for clutchless automated manual transmission systems in electric vehicles. It is well known that speed synchronization is one of the main challenges in a transmission system. In electric vehicles, clutchless automated manual transmission systems are regarded as promising transmission devices and are generally required to have high-precision speed synchronization capabilities. In order to satisfy this requirement, a robust optimal speed synchronization control scheme is proposed in this paper. The control law consists of preview control, integral control, and state-feedback control. Using an augmentation method, the proposed controller design problem is transformed into a state-feedback design problem for the augmented system first. As the external input is involved in the augmented system, the H∞ control scheme is employed to minimize the effect of disturbance on the controlled output. In addition, to ensure tradeoff between the transient response and the maximal control effort, the linear quadratic cost function and the pole placement technique are also adopted in the design. Finally, the controller gains are calculated by solving the linear matrix inequality. Simulation results show the effectiveness of the proposed control approach.

Optimal Speed Regulation Control of the Hybrid Dual Clutch Transmission Shift Process

“…The state variable is chosen to be x k = [∆ω k m , ω k m ] T and the coefficient matrices of the state space equations are given as Equation (9).…”

“…Zhu et al designed a robust speed synchronization control scheme which combined preview control, integral control and state-feedback control together. By employing the H ∞ performance index for investigating and optimizing the controller, the controller design problem is transformed into a linear matrix inequality (LMI) problem [9]. The CLAMT systems in the above study are all applied in electric vehicles, so the transient speed regulation phase is achieved by the electric motor.…”

“…As a result, the motor output torque may be disturbed by oil stirring resistance during gear change [14]. For the problem of unknown disturbance torque in the motor speed synchronization process, the common practice is to integrate robust controller designs, like H ∞ control scheme [9,15,16], sliding mode control (SMC) [12,17,18]. However, H ∞ control needs to make a tradeoff between robustness and transient responses and may be over-conservative.…”

Powertrain dynamics and control of a two speed dual clutch transmission for electric vehicles

“…Electric machine modeling Mathematical models of electric machines are well established, the basic dynamics can be captured using equivalent circuit models, as has been performed in [14]. For a three phase permanent magnet DC motor/generator with surface mounted magnets (referred to as EM in Figure 1) the formulation is used to develop a relationship between electrical input and the mechanical output of the motor.…”

Observer-Based Decentralized Tracking Control with Preview Action for a Class of Nonlinear Interconnected Systems

“…We refer the readers to [21][22][23][24][25] for some recent work in this area. In addition to the theoretical developments, many experimental studies have demonstrated that the preview control has potential applications in the fields of active suspension systems [26,27], intelligent electric vehicles [28,29], robots [30,31], water tank level control systems [32], brushless DC motors [33], etc.…”