as a sub-problem involved in the new navigation algorithm, the transformation from earth-centered earth-fixed coordinates to geodetic coordinates is addressed 4.研究了新導(dǎo)航算法中所涉及的一個(gè)子問(wèn)題??從地球坐標(biāo)系到當(dāng)?shù)氐乩碜鴺?biāo)系的坐標(biāo)變換問(wèn)題。
the method of applying frequency analysis theory is proposed to resolve the problem of ship motion . the mathematic models of ship-based missile in launch period are established . these models consist of relative motion in launch-fixed coordinate and absolute motion in earth-fixed coordinate 采用了動(dòng)靜法的描述形式建立了艦載導(dǎo)彈在發(fā)射段的數(shù)學(xué)模型,分別給出了導(dǎo)彈相對(duì)發(fā)射坐標(biāo)系的相對(duì)運(yùn)動(dòng)模型和導(dǎo)彈在地面坐標(biāo)系下的絕對(duì)運(yùn)動(dòng)模型。
the method of applying frequency analysis theory is proposed to resolve the problem of ship motion . the mathematic models of ship-based missile in launch period are established . these models consist of relative motion in launch-fixed coordinate and absolute motion in earth-fixed coordinate 采用了動(dòng)靜法的描述形式建立了艦載導(dǎo)彈在發(fā)射段的數(shù)學(xué)模型,分別給出了導(dǎo)彈相對(duì)發(fā)射坐標(biāo)系的相對(duì)運(yùn)動(dòng)模型和導(dǎo)彈在地面坐標(biāo)系下的絕對(duì)運(yùn)動(dòng)模型。
nowadays, the machining center carries through the precision inspection only following the fixed coordinates " axes, which can not completely reflects the real error of the spacial position of the practical machining outside the axes and leads to having no the directive relation between the inspected precision and the practical machining precision . so, this paper introduces that the error factors of influencing workpiece's outline on machining and carries out the solid inspection of every spot's error inside the workaround on the horizontal machining center 本文針對(duì)當(dāng)前加工中心僅沿固定的坐標(biāo)軸線進(jìn)行精度(含幾何精度和定位精度)檢驗(yàn),并不完全反映軸線外實(shí)際加工的空間位置真實(shí)誤差,導(dǎo)致檢出精度與機(jī)床實(shí)際加工精度無(wú)直接對(duì)應(yīng)關(guān)系的現(xiàn)狀,論述了加工時(shí)影響工件型面輪廓精度之加工中心的誤差因素,對(duì)加工中心實(shí)施其工作區(qū)內(nèi)各點(diǎn)誤差的立體檢測(cè)。