x=3sinwt-4coswt y=4sinwt+3coswt t=0速度快加速度
\u52a0\u901f\u5ea6\u7684\u610f\u4e49\u4ee5\u53ca\u6c42\u52a0\u901f\u5ea6\u7684\u516c\u5f0f\u662f\u901f\u5ea6\u53d8\u5316\u91cf\u4e0e\u53d1\u751f\u8fd9\u4e00\u53d8\u5316\u6240\u7528\u65f6\u95f4\u7684\u6bd4\u503c\u0394v/\u0394t\uff0c\u662f\u63cf\u8ff0\u7269\u4f53\u901f\u5ea6\u53d8\u5316\u5feb\u6162\u7684\u7269\u7406\u91cf
\u52a0\u901f\u5ea6a=\u0394v/\u0394t
\u0394v \u901f\u5ea6\u7684\u53d8\u5316\u91cf
\u0394t \u53d1\u751f\u8fd9\u4e00\u53d8\u5316\u6240\u7528\u65f6\u95f4
A
a=v/t\u3002\u52a0\u901f\u5ea6\u5373\u662f\u53cd\u6620\u901f\u5ea6\u53d8\u5316\u5feb\u6162\u7684\u91cf\u3002\u52a0\u901f\u5ea6\u5927\uff0c\u901f\u5ea6\u53d8\u5316\u5feb\u3002\u901f\u5ea6\u5927\uff0c\u52a0\u901f\u5ea6\u4e0d\u4e00\u5b9a\u5927\uff0c\u4e5f\u8bb8\u662f\u65f6\u95f4\u957f\u7684\u539f\u56e0\u3002\u52a0\u901f\u5ea6\u7684\u65b9\u5411\u4e0e\u901f\u5ea6\u65b9\u5411\u4e0d\u4e00\u5b9a\u76f8\u540c\uff0c\u6709\u66f2\u7ebf\u8fd0\u52a8\u5c31\u77e5\u9053\u4e86\u3002
Vy = Y' = 4w*coswt-3w*sinwt; Vy (t=0) = 4w
V = square root (Vx^2+Vy^2) = 5w
Ax = X'' = -3w^2*sinwt-4w^2*coswt; Ax (t=0) =-4w^2
Ay = Y'' = -4w^2*sinwt-3w^2*coswt; Ay (t=0) =-3w^2
A = square root (Ax^2+Ay^2) = -5w^2
绛旓細鍒╃敤cos鍜宻in鐨勫叧绯诲氨鍙互浜嗐傚浜庣涓涓袱杈瑰悓鏃堕櫎浠ワ紙1+a锛夛紝绗簩涓悓鏃跺垵涓锛1-a锛夛紝鐒跺悗瀵逛簬涓や釜寮忓瓙閮藉钩鏂瑰鐞嗭紝鐒跺悗涓ゅ紡鐩稿姞灏卞彲浠ヤ簡
绛旓細sint-45搴︾殑鎷夋皬鍙樻崲 鐢变簬sin鍑芥暟鏄鍑芥暟锛屽洜姝in锛堚45搴︼級绛変簬鈥攕in45搴︺45搴﹀搴斚/4锛屾墍浠in鈥45搴︽媺姘忓彉鍖栦负鈥旓紙蟺/4锛塣2/锛坰^2+蟺/4^2锛sinwt鍜coswt鐨勬媺姘忓弽鍙樻崲 sinwt鐨勬媺鏅媺鏂彉鎹 鍦 娆ф媺鍏紡: e^iwx=coswx+isinwx e^-iwx=coswx-isinwx i涓鸿櫄鏁板崟浣,涓ゅ紡鐩稿噺,娑堝幓co...
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绛旓細杩欎釜瑕佺湅浜х敓浜ゆ祦鐢电殑绾垮湀杞瓙杞埌鍝釜浣嶇疆寮濮嬭鏃躲傚鏋滀粠涓ч潰寮濮嬭鏃讹紝灏辨槸e=Emsin蠅t 濡傛灉浠庣嚎鍦堜笌纾佸満骞宠鐨勪綅缃紑濮嬭鏃讹紝灏辨槸e=Emcos蠅t銆
绛旓細(1)x=Asinwt,v=dx/dt=wAcoswt a=dv/dt=-w^2*Asinwt (2) v=wAcoswt=0 coswt=0 wt=(k+1/2)蟺 t=(k+1/2)蟺/w---k涓烘暣鏁帮紒
绛旓細sinwt鐨勫倕閲屽彾鍙樻崲鍏紡锛cos蠅0t=[exp(j蠅0t)+exp(-j蠅0t)]/2銆傚倕绔嬪彾鍙樻崲琛ㄧず鑳藉皢婊¤冻涓瀹氭潯浠剁殑鏌愪釜鍑芥暟琛ㄧず鎴愪笁瑙掑嚱鏁帮紙姝ｅ鸡鍜/鎴栦綑寮﹀嚱鏁帮級鎴栬呭畠浠殑绉垎鐨勭嚎鎬х粍鍚堛傚湪涓嶅悓鐨勭爺绌堕鍩燂紝鍌呯珛鍙跺彉鎹㈠叿鏈夊绉嶄笉鍚岀殑鍙樹綋褰㈠紡锛屽杩炵画鍌呯珛鍙跺彉鎹㈠拰绂绘暎鍌呯珛鍙跺彉鎹傛渶鍒濆倕绔嬪彾鍒嗘瀽鏄綔涓虹儹杩囩▼...
绛旓細浠=wt 鐜板湪姹倁'锛屽嵆u瀵箃姹傚 wt瀵箃姹傚 鑰寃鏄父鏁帮紝褰撶劧wt瀵兼暟涓簑 鎵浠'=w
绛旓細1鏉″洖绛 2013-10-07 12:05200912鏄涔濈骇 r=Acoswti+Bsinwtj鍐欎负鐩磋鍧愭爣褰㈠紡x=Acoswt (1)y=Bsinwt (2) 杩愬姩鏂圭▼(1)(2)涓秷鍘籺:灏(1)(2)鍋氬彉鎹/A=coswt y/B=sinwt 涓ゅ紡骞虫柟鍐嶇浉鍔犲緱x^2/A^2+y^2/B^2=1杩欏氨鏄偣M鐨勮建杩规柟绋,鍙杞ㄨ抗鏄き鍦嗐 杩介棶 璋㈣阿浣! 璇勮|閭...
绛旓細瀵X=sin(wt)姹傚寰楋細x'=wcoswt锛屽嵆涓鸿川鐐瑰湪浠讳綍鏃跺埢鐨勯熷害锛涘湪瀵箈'=wcoswt姹傚寰楋細(x')'=-w^2sinwt,鍗充负璐ㄧ偣鍦ㄤ换浣曟椂鍒荤殑鍔犻熷害
