Based on the analysis of opening and closing control manner for ring gate of hydraulic turbine, the electro-hydraulic proportional control system for ring gate of hydraulic turbine was studied. A new control system, which combines mechanics, hydraulics and electrics, was presented. More particularly, the modules of speed control and multi-cylinder synchronous control for the movement of ring gate was designed. The modules include control valve group, flow dividing module consists of flow dividing motors, and oil distributing module. And the ring gate control system principle under different condition was also studied. By the engineering application in Yunnan Honghe Nansha hydropower plant, it was show that all functions and performances of the control system satisfied the designing requirements.

In the present paper, numerical simulation about the emergency shut-down water process of cylindrical valve is performed in order to study hydraulic characteristics of three dimensional unsteady flow during runaway protection of cylindrical valve. The curves of the pressure distribution, the axial force exerting on the valve are given with the time passing under various openings. In addition, the pressure fluctuation caused by the unsteady flow of vortex tape through Francis turbine is provided and analyzed, which provides the reference for the installation and maintenance of hydro-generator unit along with the design of multi-cylinder synchronous motion system.

在分析桥梁支座更换工艺的基础上，对用于支座更换的动力监控系统进行了研究。该动力监控系统采用“工控机+可编程控制器+液压控制系统”组成分布式控制系统，实现执行机构的分散控制、集中操作，既能满足多液压缸载荷不均衡同步升降，又能够对支座更换过程中各顶升点的压力、位移和应力进行实时监控。通过在桥梁支座更换工程中的应用，该动力监控系统的各项性能指标均得到了验证。

结合17000kN×3000mm上辊万能式卷板机数控系统的研制与开发，提出了大型卷板设备数控系统的设计方案以及其中各种技术问题的解决。

为了满足水轮机筒阀在启闭过程中的多缸同步和速度控制的要求，对筒阀电液同步控制系统中的主要液压部件，如电液比例方向阀、同步液压马达、比例节流阀和非对称液压缸进行动态数学建模分析，给出了水轮机筒阀电液同步控制系统非线性数学模型。针对筒阀在启闭过程中对同步性能和速度控制要求高的特点，提出一种双闭环（同步闭环和速度闭环）综合控制方式，该控制方式内环负反馈用于多缸同步控制，外环负反馈用于多缸速度控制。利用Simulink对系统进行仿真研究，并和试验结果进行了对比．结果表明，该系统和控制方式能满足水轮机筒阀在启闭过程中对速度和同步性能的要求。