Linear Quadratic Optimal Controller Design for Constant Downstream Water-Level PI Feedback Control of Open-Canal SystemsKe Zhong, Guanghua Guan, Zhonghao Mao, Wenjun Liao, Changcheng Xiao and Haiwang SuMATEC Web Conf., 246 (2018) 01056DOI: https://doi.org/10.1051/matecconf/201824601056