摘要
在多目标控制框架下,基于线性矩阵不等式(LMI)优化技术,提出了一种H_∞/广义H_2输出反馈控制策略;利用广义H_2范数描述系统的时域硬约束,同时选择H_∞范数最小化系统的性能输出,最终将系统的控制律归结为求解具有LMI约束的(半)正定规划问题．对四自由度(4DOF)二分之一车主动悬架系统的仿真表明:H_∞/广义H_2输出反馈主动悬架系统能用有限的主动力保证操纵稳定性,并明显改善乘坐舒适性。
In the framework of multi-objective control, this paper presents a mixed H∞/generalized H2 output feedback control strategy via LMI optimization for the active suspension control. The generalized H2 norm is adapted to capture requirements for satisfying time-domain hard constraints and the H∞ norm to minimize the performance outputsl The control problem with hard constraints is converted into a semi-definite programming problem. Simulation results for a 4DOF half-car model indicate that the mixed H∞/generalized H2 active suspension system achieves control stability. The ride comfortableness by a limited active force is improved.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2006年第B07期25-29,共5页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国家自然科学基金(60374027)资助项目
吉林大学"985工程"资助项目
关键词
主动悬架
时域硬约束
H∞/广义H2范数
LMI优化
active suspension
time-domain hard constraints
H∞/generalized Hz norm
LMI optimization
