In this paper, we present the double Beta spline curved surface which is controlled by double parameters including the algorithm principles, the treatment of boundary conditions, the alternation of projection, the alg...In this paper, we present the double Beta spline curved surface which is controlled by double parameters including the algorithm principles, the treatment of boundary conditions, the alternation of projection, the algorithms of elimination hiddle line, the process to display and the primiples to produce the shaded curved surface. Based on all the above, a freedom surface modeling system (FSMS) is designed and some examples developed on FSMS are verified and analyzed.展开更多
大口径武器站射击时,机枪与摇架滑轨之间的间隙以及非理想的对称刚度缓冲簧均可能对膛口射击扰动量产生影响。为探究配合面之间的间隙以及缓冲簧刚度差异对膛口射击扰动量的影响贡献大小,建立并通过试验验证了各影响因素与膛口射击扰动...大口径武器站射击时,机枪与摇架滑轨之间的间隙以及非理想的对称刚度缓冲簧均可能对膛口射击扰动量产生影响。为探究配合面之间的间隙以及缓冲簧刚度差异对膛口射击扰动量的影响贡献大小,建立并通过试验验证了各影响因素与膛口射击扰动量之间的动力学模型,通过均匀设计安排了10种仿真试验方案,计算得到不同试验方案的膛口射击扰动量。采用基于三次B样条变换的偏最小二乘回归(partial least squares regression,PLSR)拟合得到了各影响因素与射击扰动量的响应方程,在此基础上分析了不同刚度系数以及间隙大小对膛口射击扰动量的影响规律,得到了影响膛口射击扰动量的主要因素,据此提出了减小射击扰动量的优化方向以及实际生产中的控制要素。展开更多
文摘In this paper, we present the double Beta spline curved surface which is controlled by double parameters including the algorithm principles, the treatment of boundary conditions, the alternation of projection, the algorithms of elimination hiddle line, the process to display and the primiples to produce the shaded curved surface. Based on all the above, a freedom surface modeling system (FSMS) is designed and some examples developed on FSMS are verified and analyzed.
文摘大口径武器站射击时,机枪与摇架滑轨之间的间隙以及非理想的对称刚度缓冲簧均可能对膛口射击扰动量产生影响。为探究配合面之间的间隙以及缓冲簧刚度差异对膛口射击扰动量的影响贡献大小,建立并通过试验验证了各影响因素与膛口射击扰动量之间的动力学模型,通过均匀设计安排了10种仿真试验方案,计算得到不同试验方案的膛口射击扰动量。采用基于三次B样条变换的偏最小二乘回归(partial least squares regression,PLSR)拟合得到了各影响因素与射击扰动量的响应方程,在此基础上分析了不同刚度系数以及间隙大小对膛口射击扰动量的影响规律,得到了影响膛口射击扰动量的主要因素,据此提出了减小射击扰动量的优化方向以及实际生产中的控制要素。
