Robust Preview Control for Linear Discrete-Time Systems

A framework for solving the discrete-time robust H∞ preview control algorithm is presented in this paper. The equality of augmented preview information to the state variable and non-augmented one is showed using a Hamiltonian approach

Look-ahead Preview Control with Limited Bandwidth Active Suspension - Application to Tracked Vehicle Systems

The look-ahead preview control with the use of limited bandwidth active suspensions is presented. Both a linearized racked vehicle model and a complex nonlinear model based on a commercial multibody dynamic program are used to verify the performance of preview control. The performance of the preview control system is evaluated on the ride quality which is estimated from the acceleration of the driver position. Due to the practical advantages associated with the use of limited bandwidth active control in comparison with full bandwidth systems, the results are considered important to the future development of active tracked vehicle suspensions

A Study on the Preview Controller Design for Nonlinear Tracked Vehicle Systems

As the tracked vehicle’s running speed is increasing, undesirable vibration could become unbearable particularly in the case of field running. The preview controller is designed to improve the performance of tracked vehicle system. In this paper, a proper preview controller is proposed for nonlinear tracked vehicle systems. The LQ preview control, robust preview control and reference model tracking preview control algorithm are designed for the tracked vehicle system. Commercial program model including track and nonlinear components is used to verify the control algorithm

Preview Control for Tracked Vehicle Systems with Sensor Noise

In this paper, a reference model tracking preview controller is designed for nonlinear tracked vehicle systems. The reference model to be tracked consists of observer-based preview controller and linear tracked vehicle model. The observer based preview controller is an optimal controller at noisy environment such as system and sensor noises. The linear tracked vehicle model is modified to use a rate of vertical road elevation as preview information. Commercial program model is used to verify the control algorithm. The performance of the preview control system is evaluated on the ride quality which is estimated from the acceleration of the driver's position

Cooperative regenerative braking control for maximum regenerative braking energy efficiency and vehicle stability of fuel cell hybrid electric vehicle

One of the most important control problems to improve fuel economy in fuel cell hybrid electric vehicle is cooperative regenerative braking control strategy because the electric motor can convert the kinetic or potential energy into electric energy that can be stored in super-capacitor and reused. In this study, an electric motor for regenerative braking is directly connected to the front drive axle only because front-wheel drive vehicle is common for passenger vehicle. Vehicle stability can be lost in case regenerative braking torque is applied only to front wheels for maximum braking energy recovery, i.e., FCHEV might get into an unstable motion called lock-up and understeer. Therefore, we propose systematic controller guaranteeing the vehicle stability while guaranteeing maximum regenerative braking energy recovery. Upper controller generates the desired yaw moment calculated by using LQR method for following the desired the yaw rate and side slip angle. And lower controller applies optimal regenerative braking torque and mechanical braking torque independently within equality constraints (the required total longitudinal force and yaw moment) and inequality constraints (friction circle) for optimal regenerative braking energy recovery. Carsim™ computer simulation is used to verify the effectiveness of the proposed controller

METHOD AND SYSTEM FOR CONTROLLING POWER OF FUEL CELL VEHICLE

본 발명은 연료전지 차량의 전력 제어 방법에 관한 것이다.본 발명의 실시예에 따른 연료전지 차량의 전력 제어 방법은, 상기 연료전지 차량의 예상 주행 경로를 구배에 따라 복수개의 구간으로 분할하여 설정하는 단계, 상기 분할된 복수개의 구간별로 예측 배터리 충전상태 변화량(ΔSOCPredicted)이 설정된 배터리 충방전 허용범위 내인지 비교하는 단계, 상기 분할된 복수개의 구간별로 예측 동력(PPredicted)을 설정된 최대 허용 동력(Pmax)과 비교하는 단계 및 상기 예측 배터리 충전상태 변화량(ΔSOCPredicted) 및 상기 예측 동력(PPredicted)의 비교 결과에 따라 상기 분할된 복수개의 구간을 배터리 충방전 금지구간(La) 및 배터리 충방전 허용구간(Lb)으로 미리 설정하는 단계를 포함한다