{"id":880,"date":"2026-06-25T01:55:39","date_gmt":"2026-06-25T01:55:39","guid":{"rendered":"https:\/\/oldhamcoupling.net\/understanding-coupling-inertia-how-to-calculate-it-and-why-it-affects-servo-performance\/"},"modified":"2026-06-25T01:55:39","modified_gmt":"2026-06-25T01:55:39","slug":"understanding-coupling-inertia-how-to-calculate-it-and-why-it-affects-servo-performance","status":"publish","type":"post","link":"https:\/\/oldhamcoupling.net\/vi\/understanding-coupling-inertia-how-to-calculate-it-and-why-it-affects-servo-performance\/","title":{"rendered":"Hi\u1ec3u v\u1ec1 qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i: C\u00e1ch t\u00ednh to\u00e1n v\u00e0 l\u00fd do t\u1ea1i sao n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t servo"},"content":{"rendered":"

Qu\u00e1n t\u00ednh quay \u2014 s\u1ee9c c\u1ea3n c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 quay \u0111\u1ed1i v\u1edbi s\u1ef1 thay \u0111\u1ed5i v\u1eadn t\u1ed1c g\u00f3c c\u1ee7a n\u00f3 \u2014 l\u00e0 m\u1ed9t th\u00f4ng s\u1ed1 \u0111\u01b0\u1ee3c ch\u00fa tr\u1ecdng c\u1ea9n th\u1eadn khi t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc \u0111\u1ed9ng c\u01a1 servo v\u00e0 h\u1ed9p s\u1ed1, nh\u01b0ng th\u01b0\u1eddng b\u1ecb b\u1ecf qua khi l\u1ef1a ch\u1ecdn kh\u1edbp n\u1ed1i gi\u1eefa ch\u00fang. S\u1ef1 b\u1ecf s\u00f3t n\u00e0y l\u00e0 \u0111i\u1ec1u d\u1ec5 hi\u1ec3u: kh\u1edbp n\u1ed1i nh\u1ecf, c\u00e1c th\u00f4ng s\u1ed1 trong catalog tr\u00f4ng nh\u1ecf, v\u00e0 b\u1ed9 ph\u1eadn n\u00e0y kh\u00f4ng xu\u1ea5t hi\u1ec7n trong h\u1ea7u h\u1ebft c\u00e1c b\u1ea3ng t\u00ednh t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc b\u1ed9 truy\u1ec1n \u0111\u1ed9ng servo nh\u01b0 m\u1ed9t m\u1ee5c ri\u00eang bi\u1ec7t. Nh\u01b0ng qu\u00e1n t\u00ednh c\u1ee7a kh\u1edbp n\u1ed1i \u0111\u00f3ng g\u00f3p tr\u1ef1c ti\u1ebfp v\u00e0o t\u1ed5ng qu\u00e1n t\u00ednh ph\u1ea3n \u00e1nh t\u1ea1i tr\u1ee5c \u0111\u1ed9ng c\u01a1, v\u00e0 khi n\u00f3 chi\u1ebfm m\u1ed9t ph\u1ea7n \u0111\u00e1ng k\u1ec3 trong qu\u00e1n t\u00ednh r\u00f4to \u0111\u1ed9ng c\u01a1, n\u00f3 s\u1ebd l\u00e0m suy gi\u1ea3m hi\u1ec7u su\u1ea5t \u0111\u1ed9ng h\u1ecdc c\u1ee7a servo theo nh\u1eefng c\u00e1ch kh\u00f4ng th\u1ec3 b\u00f9 \u0111\u1eafp ch\u1ec9 b\u1eb1ng vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh.<\/p>\n

B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch qu\u00e1n t\u00ednh quay l\u00e0 g\u00ec, c\u00e1ch t\u00ednh to\u00e1n n\u00f3 cho kh\u1edbp n\u1ed1i Oldham, t\u1ea1i sao n\u00f3 l\u1ea1i quan tr\u1ecdng \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t servo v\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 gi\u1eef n\u00f3 trong gi\u1edbi h\u1ea1n ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh l\u1ef1a ch\u1ecdn kh\u1edbp n\u1ed1i.<\/p>\n

\n \"T\u00ednh
Qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i c\u1ed9ng tr\u1ef1c ti\u1ebfp v\u00e0o qu\u00e1n t\u00ednh t\u1ea3i ph\u1ea3n x\u1ea1 t\u1ea1i tr\u1ee5c \u0111\u1ed9ng c\u01a1 \u2014 m\u1ed9t gi\u00e1 tr\u1ecb th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n cho \u0111\u1ebfn khi c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111i\u1ec1u ch\u1ec9nh servo l\u00e0m l\u1ed9 ra s\u1ef1 thi\u1ebfu s\u00f3t n\u00e0y.<\/figcaption><\/figure>\n

Qu\u00e1n t\u00ednh quay l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao n\u00f3 l\u1ea1i quan tr\u1ecdng?<\/h2>\n

Qu\u00e1n t\u00ednh quay (c\u00f2n g\u1ecdi l\u00e0 m\u00f4men qu\u00e1n t\u00ednh) l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 kh\u1ed1i l\u01b0\u1ee3ng tuy\u1ebfn t\u00ednh trong chuy\u1ec3n \u0111\u1ed9ng quay. C\u0169ng gi\u1ed1ng nh\u01b0 m\u1ed9t v\u1eadt n\u1eb7ng c\u1ea7n nhi\u1ec1u l\u1ef1c h\u01a1n \u0111\u1ec3 t\u0103ng t\u1ed1c theo \u0111\u01b0\u1eddng th\u1eb3ng, m\u1ed9t v\u1eadt quay c\u00f3 qu\u00e1n t\u00ednh l\u1edbn c\u1ea7n nhi\u1ec1u m\u00f4men xo\u1eafn h\u01a1n \u0111\u1ec3 t\u0103ng t\u1ed1c theo g\u00f3c. M\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang l\u00e0: M\u00f4men xo\u1eafn = Qu\u00e1n t\u00ednh \u00d7 Gia t\u1ed1c g\u00f3c<\/em>, \u0111\u00e2y l\u00e0 \u0111\u1ecbnh lu\u1eadt th\u1ee9 hai c\u1ee7a Newton, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi \u0111\u1ecbnh lu\u1eadt quay.<\/p>\n

\u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng \u0111\u1ed9ng c\u01a1 servo, t\u1ed5ng qu\u00e1n t\u00ednh m\u00e0 \u0111\u1ed9ng c\u01a1 ph\u1ea3i gia t\u1ed1c bao g\u1ed3m:<\/p>\n

    \n
  • Qu\u00e1n t\u00ednh r\u00f4to c\u1ee7a ch\u00ednh \u0111\u1ed9ng c\u01a1 (J_motor) \u2014 c\u1ed1 \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi m\u1ed9t \u0111\u1ed9ng c\u01a1 nh\u1ea5t \u0111\u1ecbnh.<\/li>\n
  • M\u00f4men qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i (J_coupling) \u2014 tr\u1ef1c ti\u1ebfp tr\u00ean tr\u1ee5c \u0111\u1ed9ng c\u01a1<\/li>\n
  • M\u00f4men qu\u00e1n t\u00ednh c\u1ee7a t\u1ea3i ph\u1ea3n \u00e1nh l\u00ean tr\u1ee5c \u0111\u1ed9ng c\u01a1 (J_load_reflected) \u2014 ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ef7 s\u1ed1 truy\u1ec1n c\u1ee7a h\u1ed9p s\u1ed1 v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng\/h\u00ecnh d\u1ea1ng c\u1ee7a t\u1ea3i.<\/li>\n<\/ul>\n

    Kh\u1edbp n\u1ed1i n\u1eb1m tr\u00ean tr\u1ee5c \u0111\u1ed9ng c\u01a1 (ho\u1eb7c r\u1ea5t g\u1ea7n v\u1edbi n\u00f3), do \u0111\u00f3 qu\u00e1n t\u00ednh c\u1ee7a n\u00f3 \u0111\u00f3ng g\u00f3p theo t\u1ef7 l\u1ec7 1:1 m\u00e0 kh\u00f4ng c\u00f3 b\u1ed9 gi\u1ea3m t\u1ed1c h\u1ed9p s\u1ed1 \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh. M\u1ed9t kh\u1edbp n\u1ed1i c\u00f3 qu\u00e1n t\u00ednh 50 g\u00b7cm\u00b2 s\u1ebd \u0111\u00f3ng g\u00f3p to\u00e0n b\u1ed9 50 g\u00b7cm\u00b2 v\u00e0o t\u1ed5ng t\u1ea3i tr\u1ecdng c\u1ee7a \u0111\u1ed9ng c\u01a1. M\u1ed9t t\u1ea3i tr\u1ecdng c\u00f3 c\u00f9ng kh\u1ed1i l\u01b0\u1ee3ng \u1edf ph\u00eda b\u00ean kia c\u1ee7a h\u1ed9p s\u1ed1 5:1 ch\u1ec9 \u0111\u00f3ng g\u00f3p 50\/25 = 2 g\u00b7cm\u00b2 v\u00e0o \u0111\u1ed9ng c\u01a1. M\u1ed1i quan h\u1ec7 h\u00ecnh h\u1ecdc n\u00e0y \u2014 qu\u00e1n t\u00ednh c\u1ee7a kh\u1edbp n\u1ed1i \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ea7y \u0111\u1ee7, qu\u00e1n t\u00ednh c\u1ee7a t\u1ea3i tr\u1ecdng \u0111\u01b0\u1ee3c chia cho b\u00ecnh ph\u01b0\u01a1ng t\u1ef7 s\u1ed1 truy\u1ec1n \u2014 c\u00f3 ngh\u0129a l\u00e0 qu\u00e1n t\u00ednh c\u1ee7a kh\u1edbp n\u1ed1i c\u00f3 th\u1ec3 c\u00f3 \u00fd ngh\u0129a kh\u00f4ng c\u00e2n x\u1ee9ng ngay c\u1ea3 khi kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a kh\u1edbp n\u1ed1i nh\u1ecf so v\u1edbi to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/p>\n

    \u1ea2nh h\u01b0\u1edfng c\u1ee7a t\u1ef7 s\u1ed1 qu\u00e1n t\u00ednh \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a \u0111\u1ed9ng c\u01a1 servo<\/h2>\n

    T\u1ef7 s\u1ed1 qu\u00e1n t\u00ednh \u2014 qu\u00e1n t\u00ednh t\u1ed5ng t\u1ea3i chia cho qu\u00e1n t\u00ednh r\u00f4to \u0111\u1ed9ng c\u01a1 \u2014 l\u00e0 th\u00f4ng s\u1ed1 quan tr\u1ecdng quy\u1ebft \u0111\u1ecbnh hi\u1ec7u su\u1ea5t \u0111\u1ed9ng h\u1ecdc c\u1ee7a h\u1ec7 th\u1ed1ng servo. Khi t\u1ef7 s\u1ed1 qu\u00e1n t\u00ednh g\u1ea7n b\u1eb1ng 1:1 (qu\u00e1n t\u00ednh t\u1ea3i b\u1eb1ng qu\u00e1n t\u00ednh \u0111\u1ed9ng c\u01a1), h\u1ec7 th\u1ed1ng servo \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p t\u1ed1t v\u00e0 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 \u0111\u1ea1t b\u0103ng th\u00f4ng cao v\u1edbi bi\u00ean \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh t\u1ed1t. Khi t\u1ef7 s\u1ed1 qu\u00e1n t\u00ednh t\u0103ng l\u00ean, b\u0103ng th\u00f4ng \u0111\u1ea1t \u0111\u01b0\u1ee3c gi\u1ea3m \u0111i \u0111\u1ed1i v\u1edbi m\u1ed9t bi\u00ean \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nh\u1ea5t \u0111\u1ecbnh, v\u00e0 h\u1ec7 th\u1ed1ng servo b\u1eaft \u0111\u1ea7u th\u1ec3 hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u1eb7c tr\u01b0ng:<\/p>\n

      \n
    • Tr\u00ean 3:1<\/strong> \u2014 Vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh servo tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n \u0111\u00e1ng k\u1ec3; h\u1ec7 s\u1ed1 khu\u1ebfch \u0111\u1ea1i v\u00f2ng l\u1eb7p v\u1ecb tr\u00ed ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1ea3m \u0111\u1ec3 duy tr\u00ec s\u1ef1 \u1ed5n \u0111\u1ecbnh, l\u00e0m gi\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c theo d\u00f5i.<\/li>\n
    • Tr\u00ean 5:1<\/strong> \u2014 Rung \u0111\u1ed9ng v\u00e0 c\u1ed9ng h\u01b0\u1edfng tr\u1edf th\u00e0nh nh\u1eefng v\u1ea5n \u0111\u1ec1 \u0111\u00e1ng lo ng\u1ea1i; \u0111\u1ed9ng c\u01a1 servo c\u00f3 th\u1ec3 dao \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh t\u0103ng t\u1ed1c v\u00e0 gi\u1ea3m t\u1ed1c.<\/li>\n
    • Tr\u00ean 10:1<\/strong> \u2014 B\u1ed9 servo s\u1ebd kh\u00f3 duy tr\u00ec \u0111\u01b0\u1ee3c \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u1edf b\u1ea5t k\u1ef3 b\u0103ng th\u00f4ng h\u1eefu \u00edch n\u00e0o; k\u00edch th\u01b0\u1edbc \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ee7 \u0111\u00e1p \u1ee9ng hi\u1ec7u su\u1ea5t \u0111\u1ed9ng c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n

      N\u1ebfu kh\u1edbp n\u1ed1i \u0111\u00f3ng g\u00f3p 15% qu\u00e1n t\u00ednh r\u00f4to \u0111\u1ed9ng c\u01a1 \u2014 m\u1ed9t t\u00ecnh hu\u1ed1ng kh\u00f4ng hi\u1ebfm g\u1eb7p khi ch\u1ecdn kh\u1edbp n\u1ed1i qu\u00e1 kh\u1ed5 \u2014 v\u00e0 ph\u1ea7n t\u1ea3i ph\u1ea3n x\u1ea1 c\u00f2n l\u1ea1i \u0111\u00e3 \u1edf t\u1ef7 l\u1ec7 3:1, th\u00ec t\u1ef7 l\u1ec7 qu\u00e1n t\u00ednh th\u1ef1c t\u1ebf s\u1ebd tr\u1edf th\u00e0nh 3,15:1. \u0110i\u1ec1u n\u00e0y th\u1ec3 hi\u1ec7n m\u1ee9c t\u0103ng 5%, c\u00f3 v\u1ebb nh\u1ecf nh\u01b0ng c\u00f3 th\u1ec3 l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh \u1ed5n \u0111\u1ecbnh \u1edf b\u0103ng th\u00f4ng y\u00eau c\u1ea7u v\u00e0 s\u1ef1 kh\u00f4ng \u1ed5n \u0111\u1ecbnh k\u00e9o d\u00e0i bu\u1ed9c ph\u1ea3i gi\u1ea3m \u0111\u1ed9 khu\u1ebfch \u0111\u1ea1i v\u00e0 l\u00e0m gi\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n

      C\u00e1ch t\u00ednh qu\u00e1n t\u00ednh gh\u00e9p n\u1ed1i<\/h2>\n

      \u0110\u1ed1i v\u1edbi m\u1ed9t h\u00ecnh tr\u1ee5 \u0111\u1eb7c \u2014 h\u00ecnh d\u1ea1ng \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 m\u00f4 ph\u1ecfng kh\u1edbp n\u1ed1i \u2014 m\u00f4men qu\u00e1n t\u00ednh quanh tr\u1ee5c quay l\u00e0:<\/p>\n

      J = \u00bd \u00d7 m \u00d7 r\u00b2<\/em><\/p>\n

      trong \u0111\u00f3 m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh b\u1eb1ng kg v\u00e0 r l\u00e0 b\u00e1n k\u00ednh ngo\u00e0i t\u00ednh b\u1eb1ng m\u00e9t. \u0110\u1ed1i v\u1edbi c\u1ee5m kh\u1edbp n\u1ed1i Oldham c\u00f3 l\u1ed7 khoan (h\u00ecnh tr\u1ee5 r\u1ed7ng), c\u00f4ng th\u1ee9c tr\u1edf th\u00e0nh:<\/p>\n

      J = \u00bd \u00d7 m \u00d7 (r_outer\u00b2 + r_inner\u00b2)<\/em><\/p>\n

      Tr\u00ean th\u1ef1c t\u1ebf, h\u00ecnh d\u1ea1ng h\u00ecnh h\u1ecdc ch\u00ednh x\u00e1c c\u1ee7a m\u1ed9t kh\u1edbp n\u1ed1i Oldham \u2014 v\u1edbi c\u00e1c r\u00e3nh, l\u1ed7 khoan v\u00e0 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m k\u1eb9p \u2014 khi\u1ebfn vi\u1ec7c t\u00ednh to\u00e1n ph\u00e2n t\u00edch tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p. C\u00e1ch ti\u1ebfp c\u1eadn ch\u00ednh x\u00e1c l\u00e0 s\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb qu\u00e1n t\u00ednh \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 trong b\u1ea3ng d\u1eef li\u1ec7u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t, \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n t\u1eeb h\u00ecnh h\u1ecdc CAD th\u1ef1c t\u1ebf ho\u1eb7c \u0111o tr\u00ean m\u1eabu v\u1eadt l\u00fd. \u0110\u1ed1i v\u1edbi c\u00e1c ph\u00e9p t\u00ednh th\u1ee7 c\u00f4ng ho\u1eb7c \u01b0\u1edbc t\u00ednh s\u01a1 b\u1ed9 khi kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb trong b\u1ea3ng d\u1eef li\u1ec7u, h\u00e3y s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c h\u00ecnh tr\u1ee5 \u0111\u1eb7c l\u00e0m gi\u1edbi h\u1ea1n tr\u00ean \u2014 qu\u00e1n t\u00ednh th\u1ef1c t\u1ebf s\u1ebd th\u1ea5p h\u01a1n m\u1ed9t ch\u00fat do v\u1eadt li\u1ec7u b\u1ecb lo\u1ea1i b\u1ecf cho c\u00e1c l\u1ed7 khoan, r\u00e3nh v\u00e0 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m k\u1eb9p.<\/p>\n

      T\u1ed5ng qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i l\u00e0 t\u1ed5ng c\u1ee7a qu\u00e1n t\u00ednh tr\u1ee5c v\u00e0 qu\u00e1n t\u00ednh \u0111\u0129a. \u0110\u1ed1i v\u1edbi \u0111\u0129a polymer, qu\u00e1n t\u00ednh \u0111\u0129a th\u01b0\u1eddng chi\u1ebfm t\u1eeb 5 \u0111\u1ebfn 15% t\u1ed5ng qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i \u2014 nh\u1ecf nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng b\u1ecf qua \u0111\u01b0\u1ee3c \u1edf \u0111\u1ed9 ch\u00ednh x\u00e1c cao. C\u00e1c gi\u00e1 tr\u1ecb qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i trong b\u1ea3ng d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt c\u1ea7n bao g\u1ed3m c\u1ea3 ba th\u00e0nh ph\u1ea7n.<\/p>\n

      \n \"T\u00ednh
      H\u00ecnh d\u1ea1ng tr\u1ee5c b\u00e1nh xe quy\u1ebft \u0111\u1ecbnh qu\u00e1n t\u00ednh \u2014 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u00f3 \u1ea3nh h\u01b0\u1edfng b\u00ecnh ph\u01b0\u01a1ng, trong khi chi\u1ec1u d\u00e0i tr\u1ee5c ch\u1ec9 c\u00f3 \u1ea3nh h\u01b0\u1edfng tuy\u1ebfn t\u00ednh. Gi\u1ea3m \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i 20% s\u1ebd gi\u1ea3m qu\u00e1n t\u00ednh 36%; gi\u1ea3m chi\u1ec1u d\u00e0i 20% ch\u1ec9 gi\u1ea3m qu\u00e1n t\u00ednh 20%.<\/figcaption><\/figure>\n

      \u1ea2nh h\u01b0\u1edfng c\u1ee7a v\u1eadt li\u1ec7u tr\u1ee5c b\u00e1nh xe \u0111\u1ebfn qu\u00e1n t\u00ednh<\/h2>\n

      V\u00ec qu\u00e1n t\u00ednh t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng (v\u00e0 do \u0111\u00f3 v\u1edbi m\u1eadt \u0111\u1ed9 v\u1eadt li\u1ec7u), vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa tr\u1ee5c nh\u00f4m v\u00e0 tr\u1ee5c th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp v\u00e0 \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i. Th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 m\u1eadt \u0111\u1ed9 g\u1ea5p kho\u1ea3ng 2,9 l\u1ea7n so v\u1edbi nh\u00f4m, v\u00ec v\u1eady tr\u1ee5c th\u00e9p kh\u00f4ng g\u1ec9 c\u00f3 c\u00f9ng h\u00ecnh d\u1ea1ng s\u1ebd t\u1ea1o ra qu\u00e1n t\u00ednh g\u1ea5p kho\u1ea3ng 2,9 l\u1ea7n so v\u1edbi tr\u1ee5c nh\u00f4m t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n

      S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y r\u1ea5t quan tr\u1ecdng khi c\u00e1c kh\u1edbp n\u1ed1i b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh v\u00ec l\u00fd do m\u00f4i tr\u01b0\u1eddng (c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m, d\u01b0\u1ee3c ph\u1ea9m, h\u00e0ng h\u1ea3i, r\u1eeda s\u1ea1ch). K\u1ef9 s\u01b0 ph\u1ea3i x\u00e1c minh r\u1eb1ng qu\u00e1n t\u00ednh cao h\u01a1n c\u1ee7a phi\u00ean b\u1ea3n th\u00e9p kh\u00f4ng g\u1ec9 kh\u00f4ng \u0111\u1ea9y t\u1ef7 l\u1ec7 qu\u00e1n t\u00ednh c\u1ee7a h\u1ec7 th\u1ed1ng servo v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n cho ph\u00e9p. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, kh\u1edbp n\u1ed1i th\u00e9p kh\u00f4ng g\u1ec9 l\u1edbn h\u01a1n c\u00f3 th\u1ec3 c\u1ea7n \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng kh\u1edbp n\u1ed1i nh\u1ecf h\u01a1n \u2014 ch\u1ea5p nh\u1eadn bi\u00ean \u0111\u1ed9 m\u00f4-men xo\u1eafn gi\u1ea3m \u2014 \u0111\u1ec3 gi\u1eef qu\u00e1n t\u00ednh trong gi\u1edbi h\u1ea1n cho ph\u00e9p.<\/p>\n

      \n
      \n\n\n\n\n\n\n\n\n\n
      \u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i kh\u1edbp n\u1ed1i (mm)<\/th>\nKh\u1ed1i l\u01b0\u1ee3ng tr\u1ee5c nh\u00f4m (g\u00b7cm\u00b2)<\/th>\nTr\u1ee5c b\u00e1nh xe b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 (g\u00b7cm\u00b2)<\/th>\nT\u1ef7 l\u1ec7 qu\u00e1n t\u00ednh (SS \/ Al)<\/th>\n<\/tr>\n<\/thead>\n
      20<\/td>\n0.35<\/td>\n1.0<\/td>\n2,9\u00d7<\/td>\n<\/tr>\n
      25<\/td>\n0.85<\/td>\n2.5<\/td>\n2,9\u00d7<\/td>\n<\/tr>\n
      32<\/td>\n2.8<\/td>\n8.1<\/td>\n2,9\u00d7<\/td>\n<\/tr>\n
      40<\/td>\n8.5<\/td>\n24.7<\/td>\n2,9\u00d7<\/td>\n<\/tr>\n
      50<\/td>\n22.0<\/td>\n63.8<\/td>\n2,9\u00d7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

      V\u00ec sao OD c\u00f3 t\u00e1c \u0111\u1ed9ng l\u1edbn h\u01a1n chi\u1ec1u d\u00e0i l\u00ean qu\u00e1n t\u00ednh?<\/h2>\n

      M\u1ed9t quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 kh\u1edbp n\u1ed1i ng\u1eafn h\u01a1n, r\u1ed9ng h\u01a1n v\u00e0 kh\u1edbp n\u1ed1i d\u00e0i h\u01a1n, h\u1eb9p h\u01a1n c\u00f3 c\u00f9ng kh\u1ed1i l\u01b0\u1ee3ng s\u1ebd c\u00f3 c\u00f9ng qu\u00e1n t\u00ednh. Th\u1ef1c t\u1ebf l\u00e0 kh\u00f4ng ph\u1ea3i v\u1eady. V\u00ec qu\u00e1n t\u00ednh t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi b\u00ecnh ph\u01b0\u01a1ng b\u00e1n k\u00ednh, \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1n t\u00ednh l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi chi\u1ec1u d\u00e0i.<\/p>\n

      H\u00e3y xem x\u00e9t hai kh\u1edbp n\u1ed1i c\u00f3 c\u00f9ng kh\u1ed1i l\u01b0\u1ee3ng: m\u1ed9t kh\u1edbp c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) 40 mm v\u00e0 chi\u1ec1u d\u00e0i 30 mm, v\u00e0 m\u1ed9t kh\u1edbp kh\u00e1c c\u00f3 OD 32 mm v\u00e0 chi\u1ec1u d\u00e0i 47 mm. Kh\u1edbp n\u1ed1i 40 mm s\u1ebd c\u00f3 qu\u00e1n t\u00ednh cao h\u01a1n kho\u1ea3ng 56% so v\u1edbi kh\u1edbp n\u1ed1i 32 mm, m\u1eb7c d\u00f9 kh\u1ed1i l\u01b0\u1ee3ng gi\u1ed1ng nhau, b\u1edfi v\u00ec kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 \u1edf b\u00e1n k\u00ednh l\u1edbn h\u01a1n. \u00dd ngh\u0129a th\u1ef1c ti\u1ec5n: khi vi\u1ec7c gi\u1ea3m thi\u1ec3u qu\u00e1n t\u00ednh l\u00e0 quan tr\u1ecdng, h\u00e3y ch\u1ecdn \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i nh\u1ecf nh\u1ea5t \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u m\u00f4-men xo\u1eafn, ngay c\u1ea3 khi \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 ph\u1ea3i ch\u1ea5p nh\u1eadn m\u1ed9t kh\u1edbp n\u1ed1i d\u00e0i h\u01a1n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi chi\u1ec1u d\u00e0i l\u1ed7 c\u1ea7n thi\u1ebft. Gi\u1ea3m qu\u00e1n t\u00ednh th\u00f4ng qua gi\u1ea3m \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i lu\u00f4n hi\u1ec7u qu\u1ea3 h\u01a1n so v\u1edbi gi\u1ea3m chi\u1ec1u d\u00e0i.<\/p>\n

      H\u01b0\u1edbng d\u1eabn l\u1eadp ng\u00e2n s\u00e1ch qu\u00e1n t\u00ednh th\u1ef1c ti\u1ec5n<\/h2>\n

      C\u00e1c h\u01b0\u1edbng d\u1eabn sau \u0111\u00e2y bao g\u1ed3m c\u00e1c t\u00ecnh hu\u1ed1ng ph\u1ed5 bi\u1ebfn nh\u1ea5t trong thi\u1ebft k\u1ebf chuy\u1ec3n \u0111\u1ed9ng ch\u00ednh x\u00e1c v\u00e0 h\u1ec7 th\u1ed1ng truy\u1ec1n \u0111\u1ed9ng servo:<\/p>\n

      Tr\u1ee5c servo b\u0103ng th\u00f4ng cao (CNC, robot, g\u1eafp v\u00e0 \u0111\u1eb7t):<\/strong> Gi\u1eef qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i d\u01b0\u1edbi 5% qu\u00e1n t\u00ednh r\u00f4to \u0111\u1ed9ng c\u01a1. C\u00e1c \u1ee9ng d\u1ee5ng n\u00e0y y\u00eau c\u1ea7u gia t\u1ed1c v\u00e0 gi\u1ea3m t\u1ed1c nhanh v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u1ecbnh v\u1ecb cao. B\u1ea5t k\u1ef3 qu\u00e1n t\u00ednh kh\u00f4ng c\u1ea7n thi\u1ebft n\u00e0o \u0111\u1ec1u tr\u1ef1c ti\u1ebfp h\u1ea1n ch\u1ebf b\u0103ng th\u00f4ng \u0111\u1ea1t \u0111\u01b0\u1ee3c. S\u1eed d\u1ee5ng \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i kh\u1edbp n\u1ed1i nh\u1ecf nh\u1ea5t \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 m\u00f4-men xo\u1eafn v\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7, v\u1edbi c\u00e1c tr\u1ee5c b\u1eb1ng nh\u00f4m.<\/p>\n

      Tr\u1ee5c servo ti\u00eau chu\u1ea9n (t\u1ef1 \u0111\u1ed9ng h\u00f3a chung, \u0111\u00f3ng g\u00f3i, \u0111\u1ecbnh v\u1ecb b\u0103ng t\u1ea3i):<\/strong> Th\u00f4ng th\u01b0\u1eddng, qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i l\u00ean \u0111\u1ebfn 10% qu\u00e1n t\u00ednh r\u00f4to \u0111\u1ed9ng c\u01a1 l\u00e0 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c. B\u0103ng th\u00f4ng servo c\u1ea7n thi\u1ebft cho c\u00e1c \u1ee9ng d\u1ee5ng n\u00e0y \u1edf m\u1ee9c v\u1eeba ph\u1ea3i, v\u00e0 t\u1ef7 l\u1ec7 qu\u00e1n t\u00ednh cao h\u01a1n m\u1ed9t ch\u00fat c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh b\u1eb1ng c\u00e1ch hi\u1ec7u ch\u1ec9nh servo.<\/p>\n

      B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc:<\/strong> Qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i l\u00ean \u0111\u1ebfn 15% qu\u00e1n t\u00ednh r\u00f4to \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn, v\u00ec \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc th\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c m\u00f4-men xo\u1eafn th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi gi\u1edbi h\u1ea1n m\u00f4-men xo\u1eafn \u0111\u1ed9ng v\u00e0 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 qu\u00e1n t\u00ednh cao h\u01a1n so v\u1edbi \u0111\u1ed9ng c\u01a1 servo tr\u01b0\u1edbc khi hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t b\u01b0\u1edbc tr\u1edf th\u00e0nh v\u1ea5n \u0111\u1ec1 \u0111\u00e1ng lo ng\u1ea1i. Tuy nhi\u00ean, h\u00e3y ki\u1ec3m tra xem qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i c\u00f3 l\u00e0m cho t\u1ed5ng qu\u00e1n t\u00ednh ph\u1ea3n x\u1ea1 v\u01b0\u1ee3t qu\u00e1 t\u1ea3i qu\u00e1n t\u00ednh t\u1ed1i \u0111a \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb c\u1ee7a \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc hay kh\u00f4ng.<\/p>\n

      K\u1ebft n\u1ed1i b\u1ed9 m\u00e3 h\u00f3a:<\/strong> Qu\u00e1n t\u00ednh c\u1ee7a kh\u1edbp n\u1ed1i ph\u1ea3i nh\u1ecf h\u01a1n 1% qu\u00e1n t\u00ednh c\u1ee7a tr\u1ee5c v\u00e0 r\u00f4to b\u1ed9 m\u00e3 h\u00f3a. C\u00e1c kh\u1edbp n\u1ed1i Oldham thu nh\u1ecf c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i t\u1eeb 16 \u0111\u1ebfn 20 mm v\u1edbi tr\u1ee5c b\u1eb1ng nh\u00f4m th\u01b0\u1eddng d\u1ec5 d\u00e0ng \u0111\u00e1p \u1ee9ng ti\u00eau ch\u00ed n\u00e0y \u2014 gi\u00e1 tr\u1ecb qu\u00e1n t\u00ednh c\u1ee7a \u0111\u0129a v\u00e0 tr\u1ee5c c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c trong kho\u1ea3ng t\u1eeb 0,1 \u0111\u1ebfn 0,35 g\u00b7cm\u00b2.<\/p>\n

      \n \"Thi\u1ebft
      Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i (OD) nh\u1ecf nh\u1ea5t \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 m\u00f4-men xo\u1eafn v\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 khoan \u2014 thay v\u00ec m\u1eb7c \u0111\u1ecbnh ch\u1ecdn k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n \u2014 l\u00e0 c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 gi\u1ea3m thi\u1ec3u qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i trong h\u1ec7 th\u1ed1ng truy\u1ec1n \u0111\u1ed9ng servo.<\/figcaption><\/figure>\n

      T\u00ednh to\u00e1n qu\u00e1n t\u00ednh th\u1ef1c t\u1ebf<\/h2>\n

      \u0110\u01b0\u1ee3c cho:<\/strong> M\u1ed9t \u0111\u1ed9ng c\u01a1 servo c\u00f3 qu\u00e1n t\u00ednh r\u00f4to J_motor = 150 g\u00b7cm\u00b2 d\u1eabn \u0111\u1ed9ng m\u1ed9t tr\u1ee5c v\u00edt bi th\u00f4ng qua kh\u1edbp n\u1ed1i Oldham b\u1eb1ng nh\u00f4m c\u00f3 \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i 32 mm. T\u00e0i li\u1ec7u trong catalogue ghi qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i J_coupling = 2,8 g\u00b7cm\u00b2. Qu\u00e1n t\u00ednh t\u1ea3i ph\u1ea3n x\u1ea1 t\u1ea1i tr\u1ee5c \u0111\u1ed9ng c\u01a1 (tr\u1ee5c v\u00edt bi + \u0111ai \u1ed1c + gi\u00e1 \u0111\u1ee1) l\u00e0 J_load = 280 g\u00b7cm\u00b2.<\/p>\n

      T\u1ed5ng qu\u00e1n t\u00ednh ph\u1ea3n x\u1ea1:<\/strong> J_total = J_motor + J_coupling + J_load = 150 + 2,8 + 280 = 432,8 g\u00b7cm\u00b2<\/p>\n

      T\u1ef7 l\u1ec7 qu\u00e1n t\u00ednh:<\/strong> J_load_total \/ J_motor = (J_coupling + J_load) \/ J_motor = (2.8 + 280) \/ 150 = 1.89:1<\/p>\n

      \u0110\u00f3ng g\u00f3p v\u00e0o s\u1ef1 gh\u00e9p n\u1ed1i:<\/strong> J_coupling \/ J_motor = 2,8 \/ 150 = 1,87% \u2014 n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p c\u1ee7a 10%. Kh\u1edbp n\u1ed1i n\u00e0y c\u00f3 k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p v\u1edbi qu\u00e1n t\u00ednh trong \u1ee9ng d\u1ee5ng n\u00e0y.<\/p>\n

      N\u1ebfu \u1ee9ng d\u1ee5ng t\u01b0\u01a1ng t\u1ef1 y\u00eau c\u1ea7u c\u00e1c kh\u1edbp n\u1ed1i b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 cho m\u00f4i tr\u01b0\u1eddng r\u1eeda s\u1ea1ch, J_coupling s\u1ebd t\u0103ng l\u00ean kho\u1ea3ng 8,1 g\u00b7cm\u00b2 (g\u1ea5p 2,9 l\u1ea7n gi\u00e1 tr\u1ecb c\u1ee7a nh\u00f4m). \u0110\u00f3ng g\u00f3p c\u1ee7a kh\u1edbp n\u1ed1i t\u0103ng l\u00ean 5,4% v\u00e0o qu\u00e1n t\u00ednh \u0111\u1ed9ng c\u01a1 \u2014 v\u1eabn n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p c\u1ee7a 10%, nh\u01b0ng c\u1ea7n x\u00e1c nh\u1eadn l\u1ea1i tr\u01b0\u1edbc khi ho\u00e0n thi\u1ec7n th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n

      Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n

      Qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i l\u00e0 m\u1ed9t gi\u00e1 tr\u1ecb nh\u1ecf nh\u01b0ng c\u00f3 th\u1ec3 g\u00e2y \u1ea3nh h\u01b0\u1edfng kh\u00f4ng c\u00e2n x\u1ee9ng \u0111\u1ebfn hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng servo n\u1ebfu b\u1ecb b\u1ecf qua. V\u00ec kh\u1edbp n\u1ed1i n\u1eb1m tr\u1ef1c ti\u1ebfp tr\u00ean tr\u1ee5c \u0111\u1ed9ng c\u01a1 m\u00e0 kh\u00f4ng c\u00f3 t\u1ef7 s\u1ed1 truy\u1ec1n \u0111\u1ec3 gi\u1ea3m qu\u00e1n t\u00ednh ph\u1ea3n x\u1ea1 c\u1ee7a n\u00f3, n\u00ean n\u00f3 \u0111\u00f3ng g\u00f3p ho\u00e0n to\u00e0n v\u00e0o t\u1ef7 s\u1ed1 qu\u00e1n t\u00ednh t\u1ed5ng th\u1ec3. Gi\u1eef qu\u00e1n t\u00ednh kh\u1edbp n\u1ed1i d\u01b0\u1edbi 5 \u0111\u1ebfn 10 ph\u1ea7n tr\u0103m qu\u00e1n t\u00ednh r\u00f4to \u0111\u1ed9ng c\u01a1 \u2014 b\u1eb1ng c\u00e1ch ch\u1ecdn \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i nh\u1ecf nh\u1ea5t \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 m\u00f4-men xo\u1eafn v\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7, s\u1eed d\u1ee5ng c\u00e1c tr\u1ee5c b\u1eb1ng nh\u00f4m thay v\u00ec th\u00e9p kh\u00f4ng g\u1ec9 \u1edf nh\u1eefng n\u01a1i m\u00f4i tr\u01b0\u1eddng cho ph\u00e9p, v\u00e0 bao g\u1ed3m thu\u1eadt ng\u1eef kh\u1edbp n\u1ed1i trong m\u1ecdi ph\u00e9p t\u00ednh qu\u00e1n t\u00ednh servo \u2014 s\u1ebd lo\u1ea1i b\u1ecf m\u1ed9t ngu\u1ed3n g\u00e2y suy gi\u1ea3m hi\u1ec7u su\u1ea5t servo m\u00e0 d\u1ec5 d\u00e0ng ng\u0103n ng\u1eeba \u1edf giai \u0111o\u1ea1n thi\u1ebft k\u1ebf v\u00e0 kh\u00f3 ch\u1ea9n \u0111o\u00e1n sau khi v\u1eadn h\u00e0nh.<\/p>\n

      H\u00e3y xem qua trang c\u1ee7a ch\u00fang t\u00f4i. D\u00f2ng s\u1ea3n ph\u1ea9m kh\u1edbp n\u1ed1i Oldham v\u1edbi \u0111\u1ea7y \u0111\u1ee7 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt qu\u00e1n t\u00ednh.<\/a>, ho\u1eb7c Li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i<\/a> \u0110\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 t\u00ednh to\u00e1n qu\u00e1n t\u00ednh c\u1ee5 th\u1ec3 cho h\u1ec7 th\u1ed1ng truy\u1ec1n \u0111\u1ed9ng servo c\u1ee7a b\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"

      Rotational inertia \u2014 the resistance of a rotating body to changes in its angular velocity \u2014 is a parameter that receives careful attention when sizing servo motors and gearboxes, but is frequently overlooked when selecting the coupling that sits between them. This oversight is understandable: the coupling is small, the numbers in the catalogue look […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[722],"tags":[921,924,918,905,920,923,917,919,922],"class_list":["post-880","post","type-post","status-publish","format-standard","hentry","category-blog","tag-aluminium-vs-stainless-inertia","tag-coupling-inertia-budgeting","tag-coupling-inertia-calculation","tag-coupling-inertia-servo","tag-coupling-od-inertia","tag-moment-of-inertia-coupling","tag-rotational-inertia-coupling","tag-servo-inertia-ratio","tag-servo-tuning-coupling"],"_links":{"self":[{"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/posts\/880","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/comments?post=880"}],"version-history":[{"count":0,"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/posts\/880\/revisions"}],"wp:attachment":[{"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/media?parent=880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/categories?post=880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oldhamcoupling.net\/vi\/wp-json\/wp\/v2\/tags?post=880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}