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连续时间系统中的稀疏鲁棒控制难题
稀疏控制的理想很简单:控制器别老动,能少动就少动。但一旦把“少动”放进连续时间、再加上噪声、参数不确定性、状态约束、输入约束、终端约束,问题立刻从“省电”升级成“别翻车”。论文采用的稀疏指标是 L1 代价,即把控制输入在整个时间区间上的绝对值积分最小化。L1 比 L0 更容易算,往往还能把控制推向“长时间为零、少数时刻激活”的稀疏形态。状态方程 ẋ(t)=Ax(t)+Bu(t)+w(t) 是全文的起点。A 是系统矩阵,B 是控制矩阵,w(t) 是扰动。控制 u 和扰动 w 要对整个连续时间区间负责。控制输入被限制在盒约束集合里,每个维度都不能超出给定上下界。论文直接按真实系统的硬限制来建模。扰动同样被限制在有界集合里。鲁棒控制面对一整族可能的世界,普通最优控制往往只面对一个理想世界。
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