本文研究了跟踪误差最小化的两种模型：二次优化模型和线性优化模型。
This article investigates two models for minimizing tracking error: quadratic tracking error optimization and linear tracking error optimization.
根据模型的结构特点，提出分层次优化的求解策略。
According to the structure character of the model, it's adopted by hierarchic optimization strategy.
建立了两片式铝罐尺寸设计的优化模型，讨论了模型的两种次优解。
The size design of optimal model for two pieces Aluminium Can has been established, two kinds of suboptimal solution about the model has been discussed.
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