Study on the Development of the Optimum Design System for the Principal Particulars and the Control System of the Hydrofoil Craft Considering the Motion Controllability.

1. 水翼艇运动固有稳定性的研究(1)全淹没水翼艇在运动中不太稳定，但通过对主要细节的适当设计，发现水翼艇本身是可以稳定的。并分别找到了有助于提高纵向运动和横向运动固有稳定性的主要特性。(2)用非线性规划方法同时改变几个主要特性时，可以有效地保证系统的固有稳定性。水翼艇运动控制系统实用设计方法的研究(1)研究发现，ILQ方法可以明确瞬态响应特性，消除被控变量之间的干扰，是最优伺服系统设计的实用方法。(2)采用上述方法设计的控制系统具有鲁棒性，如对艇速的变化、艇叶的下沉等。考虑运动可控性的水运艇优化设计系统的建立(1)可以建立考虑运动可控性的确定主要参数的优化设计系统。(2)系统是用面向对象的语言编写的，因此人们认识到该系统对于设计者来说非常容易使用，并且易于对程序进行添加或改进。

1. Study on the inherent stability of the hydrofoil craft motion(1) The fully submerged hydrofoil craft is not so stable in motion, but it was found that the craft itself can be stabilized withe the suitable design of the principal particulars. And we could found the principal particulars which contribute to the improvement of the inherent stabelity for the longitudinal and the lateral motion respectively.(2) It may be possible to secure the inherent stablity effectively when the several principal particulars are varied simultaneously with non-linear programming.2. Study on the prctical design method of the hydrofoil craft motion control system(1) It was found that the ILQ method for the design of optimal servo systems was very prctical because it could specify the transient response characteristics and remove the interference among the controlled variables.(2) The control system designed with the method above mentioned has robustness for instance to the change of the craft speed or the foil submergence.3. Development of the optimum design system for the hydrofil craft considering the motion controllability(1) The optimum design system could be constructed which decide the principal particulars considering the motion controllability.(2) The system was programd with the object-oriented language and so it was recognized that the system was very easy both to use for the designer and to add or improve the program.