Adaptive Control of Unavoidable Hazardous Releases

该项目的目的是 开发一个计算程序 用于自适应控制 危险释放，无论是水 或有毒物质。 在 特别地，控制策略是 旨在故意释放 人工储存或加工 被视为 不可避免，因为替代 可能会导致更严重的 灾难性的结果。 的 程序包括组合 二维瞬态模型 来模拟 释放及其随后的命运 环境和适应性 控制方案，监测 被释放人员的现状 物质和环境条件。 实时反馈将发送到 控制机制，反过来， 开发最佳释放 最大限度地减少 预定的性能指标。 模拟模型是 用于直接解决 释放扩散已经被 反复验证他们的 准确性和可靠性， 标准优化技术 已经证明了对水的控制 有毒物质释放是可能的。 建议的新奇 研究在于另一种选择 控制问题的公式化 避免了重复模拟 的直接问题，其中，由于 冗长的计算，阻碍了 实时执行 procedure. 相比之下， 伴随方程的解 解决各种进化问题 通过放大和 变形域，有可能 优化给定性能指标 无需重复模拟。 的 结果是一个有效的， 不可避免的实际程序 危险的释放， 最大限度地减少其环境 冲击

The purpose of this project is to develop a computational procedure for the adaptive control of hazardous releases, either of water or toxic substances. In particular, the control strategy is aimed at deliberate releases from man-made storage or process facilities that are deemed unavoidable because alternative actions may lead to more severe catastrophic results. The procedure consists of combining two-dimensional transient models that simulate the dynamics of the release and its subsequent fate in the environment and an adaptive control scheme, which monitors the current state of the released matter and the ambient conditions. Real-time feedback is sent to the control mechanism, which in turn develops an optimum release strategy that minimizes a predetermined performance index. The simulation models that are employed for the direct solution of the release spreading have been repeatedly verified for their accuracy and reliability and standard optimization techniques have shown that control of water and toxic releases is possible. The novelty of the proposed research lies in an alternative formulation of the control problem that avoids iterative simulations of the direct problem, which, due to lengthy computations, hinder the real-time implementation of the procedure. In contrast, by solution of the adjoint equation for a variety of evolution problems described by an enlarging and deforming domain, it is possible to optimize a given performance index without repeated simulations. The result is an efficient and practical procedure for unavoidable hazardous releases that can minimize their environmental impact.