Ariā Pūnaha Hihiri i roto i te Hoahoa Tukanga
I te ao o te hangarau tukanga—ahakoa i roto i ngā ahumahi matū, kai, pūngao, rongoā, hanga rānei—ehara i te mea ko te hoahoa anake te whakarite kia "mahi" te tukanga i ngā āhuatanga pumau. Inaa, kei te huri tonu ngā tukanga: ka rerekē ngā tere rere, ka rerekē te hanganga o ngā rauemi mata, ka rerekē ngā pāmahana taiao, ka puta ngā hapa o ngā taputapu, ka puta rānei ngā raruraru mai i ētahi atu wae. Koinei te wāhi e noho ai te ariā pūnaha hihiri hei tūāpapa nui: ka āwhina i ngā kaihangarau ki te mārama ki te urupare a ngā tukanga ki ngā huringa i roto i te wā, me pēhea te hoahoa i ngā tukanga kia noho haumaru, kia pumau, kia whai hua hoki.
1. He aha te pūnaha hihiri?
I te whakarapopototanga, he pūnaha hihiri te pūnaha e whakawhirinaki ana ki te wā. Mena ka whakatauhia he taurangi tukanga (hei tauira, te pāmahana o te tauhohenga, te taumata o te tāke, te pēhanga o te pou whakatō) ehara i te mea ko te whakaurunga o nāianei anake engari ko ngā āhuatanga o mua, kāti he hihiri te pūnaha. Ko te tikanga ka puta tēnei nā te kohikohinga (te taurite papatipu, te taurite pūngao rānei), pērā i te kohikohinga papatipu i roto i te tāke, te penapena rānei o te pūngao wera i roto i ngā pakitara me te wai o te tauhohenga.
I roto i te horopaki o te hoahoa tukanga, ka whakatauirahia e te ariā pūnaha hihiri te whanaungatanga i waenga i:
– Tāurunga: ngā huringa o ngā takirere, ngā tere rere, ngā whakamahana, ngā whakamatao, ngā tautuhinga whakahaere rānei.
– Āhua (āhua ā-roto): ngā taurangi e penapena ana i te "mahara" o te pūnaha, pērā i te papatipu i roto i te tāke, te pāmahana o te tauhohenga, te hanganga i roto i te pou.
– Putanga: ngā taurangi e inehia ana, e whaia ana rānei hei whāinga kounga, pērā i te hanganga o te hua, te tere whakaputa, te pāmahana whakaputa rānei.
2. He aha te hiranga o ngā hihiri i roto i te hoahoa tukanga?
He maha ngā wā, ka puta he raruraru i tētahi hoahoa e ātaahua ana i roto i ngā tātaitanga āhua pumau ina he hihiri ngā mahi o te ao tūturu. Ko ētahi o ngā take matua me whai whakaaro ki ngā hihiri ko:
1. Te haumaru o te tukanga
Ko ngā pikinga pēhanga nā te puhoi o te urupare, ngā tauhohenga tere nā te roa o te marara o te wera, te whakakī rawa rānei o ngā taumata tāke, he tauira ēnei o ngā raruraru hihiri ka mate pea.
2. Te pumau o te mahi
Tērā pea ka whakaatu te pūnaha i ngā wiriwiri (ngāwariwari), ka ngaro pea te ūnga i tawhiti (ka ngaro rānei te ūnga), ka kore rānei e pumau ina he iti noa te ngangau.
3. Kounga hua
I roto i ngā ahumahi rongoā me te kai, ka taea e ngā huringa iti te whakaputa hua i waho o ngā whakaritenga. Mā ngā hihiri ka whakatau te tere o te hokinga o te pūnaha ki ngā whakaritenga.
4. Te hoahoa whakahaere me ngā taputapu
Ko te kōwhiringa o ngā pūoko, ngā kaiwhakaoho, ngā rautaki whakahaere (PID, cascade, MPC) e whakawhirinaki ana ki ngā āhuatanga hihiri: te pūmau wā, te whakaroa, te hononga i waenga i ngā taurangi.
5. Te arotau i te tīmatanga me te whakaweto
Ka pā te wā tīmatanga ki ngā utu me te hua. Mā te hoahoa e whai whakaaro ana ki ngā āhuatanga auaha ka taea te whakatere i te pikinga me te kore e hipa i ngā rohe haumaru.
3. Pūtake pāngarau: ngā whārite rerekētanga me ngā taurite
Ko te nuinga o ngā tauira pūnaha tukanga hihiri e ahu mai ana i ngā taurite papatipu, ngā taurite pūngao, me ngā taurite nekehanga e whakaputa ana i ngā whārite rerekētanga noa (ODE), i roto rānei i ngā pūnaha uaua ake ka taea te huri hei whārite rerekētanga wāhanga (PDE).
He tauira māmā: he tāke whakaranu (CSTR) me te rōrahi wai e rerekē ana. Ka taea te tuhi i te taurite papatipu katoa:
\[
\frac{dV}{dt} = F_{in} – F_{out}
\]
Mena kei te hiahia tātou ki te kukū o te wāhanga A:
\[
\frac{d(C_A V)}{dt} = F_{in}C_{A,in} – F_{out}C_A + r_A V
\]
I konei, ka kite tātou ehara i te mea he pānga noa iho o te whakaurunga o te iahiko te panonitanga o te kukū, engari he pānga anō hoki nō te kohikohinga i roto i te rōrahi o te tāke me te tere o te tauhohenga. Koinei te mauri o ngā mahi tukanga.
4. Ngā ariā matua: te raupapa pūnaha, te pūmau wā, me te wā mate
I roto i te ariā pūnaha hihiri, he maha ngā tawhā e whakamahia ana e ngā kaihoahoa tukanga i ia rā:
– Te raupapa pūnaha: te maha o ngā āhua motuhake. Ko te tāke taumata-kotahi te tikanga he raupapa 1, ko ngā tāke e rua e raupapa ana ka taea te raupapa 2, ā, pērā tonu.
– Pūmau wā (τ): he ine i te tere o te urupare a te pūnaha ki te huringa. Ka puhoi te pūnaha he nui te τ ki te tae ki tētahi āhua hou.
– Te wā mate / te whakaroa wā (θ): te whakaroa i mua i te tīmatanga o te putanga ki te huri i muri i te whakarerekētanga o te tāuru, hei tauira nā te whakaroa kawe i roto i te paipa roa, te whakaroa pūoko rānei.
Ko te huinga o τ me θ te mea nui e whakatau ana i te uauatanga o te whakahaere. Ko ngā pūnaha he nui ngā wā mate e pā ana ki te pūmau wā he uaua ake, he ngāwari hoki ki te wiri mena kāore i te āta hangaia te kaiwhakahaere.
5. Ngā tauira whakarārangi me te ātea-āhua
He maha ngā tukanga kāore i te rārangi, inā koa ngā tauhohenga me ngā nekehanga tauhohenga tauhohenga me te pāmahana, ngā pou whakatōtō rānei me ngā whanaungatanga thermodynamic uaua. Heoi, mō te tātari tuatahi me te hoahoa whakahaere, he maha ngā wā ka mahia te whakarārangi huri noa i te pūwāhi whakahaere.
Ka taea te tuhi i ngā tauira rārangi ki te āhua ā-āhua:
\[
\dot{x} = Ax + Bu
\]
\[
y = Cx + Du
\]
Anei:
– Ko te \(x\) he whārite āhua (hei tauira, te pāmahana, te hanganga, te pupuri),
– Ko te \(u\) te tāuru (te whakatuwheratanga o te takirere, te mana whakamahana),
– Ko te putanga (taurangi ine, taurangi ūnga rānei) ko \(y\).
Ko te painga o tēnei huarahi he āheinga ki te tātari pumau pūnaha me te hoahoa whakahaere maha-taurangi.
6. Ngā pānga o te pumau me te hoahoa
Ko te pumau te tikanga ka hoki te pūnaha ki te taurite i muri i tētahi raruraru iti. I roto i te hoahoa tukanga, ehara i te mea he take pāngarau anake te pumau, engari he mea e pā ana ki te whakahaere me te haumaru.
I te nuinga o te wā:
– He pumau te pūnaha: ka mutu ngā raruraru, ā, ka hoki te putanga ki te āhua noa.
– Pūnaha taha: kāore ngā raruraru e memeha, ka mau tonu pea hei wiriwiri.
– Pūnaha kore pumau: ka piki ake ngā raruraru, ka taea te arahi i te oma, te whakaweto rānei.
I roto i te hoahoa, ka taea te awe i te pumau e:
– te rahi o te pupuri (te rahinga o te tāke, te kaha wera),
– te kōwhiringa me te mahi whakahaere o te takirere,
– te whakaurunga wera e whakapakari ana i te hononga,
– te hangarua i ngā takahuri ka puta ake ai ngā whanaketanga uaua.
He tauira matarohia te hangarua: ahakoa e whakapiki ana i te whai huatanga , e tāpiri ana i te "urupare ā-roto" ā, ka taea te hanga i ngā wiri mena kāore i te tika te hoahoa.
7. Ngā āhuatanga o te whiriwhiri taputapu: ngā taupatupatu matua
Mā te ariā pūnaha hihiri ka āwhina i te whakautu i ngā pātai hoahoa mahi, hei tauira:
– Kia pēhea te rahi o te tāke ārai e hiahiatia ana?
Ka āraihia e ngā tāke nui ngā piki me ngā heke (he pai mō te pumau), engari he utu nui, ā, ka roa ake te noho (ka kino pea ki te kounga mena he tairongo te hua).
– He pai ake te whakawhiti wera nui, iti rānei?
Ka whakanui ake te nui o te mata i te kaha whakawhiti wera, engari ka whakarerekē anō hoki i te urupare wera. Hei tāpiri, ka puta te poke me ngā panonitanga o te tauwehenga whakawhiti wera whānui (U) i roto i te wā.
– Me pēhea te whiriwhiri i te rahi o te paipa?
Ka pā te whānui me te roa o ngā paipa ki te whakaroa o te kawe, te ngaronga o te pēhanga, me ngā āhuatanga pēhanga me te rere.
I ngā wā maha, kāore i te pai ake te "nui". Mā ngā āhuatanga hihiri ka akiakihia ngā kaihoahoa ki te kimi i te taurite tino pai i waenga i te whakaiti i te raruraru, te utu, me te urupare.
8. Te whakaurunga ki ngā pūnaha whakahaere: mai i te PID ki te MPC
Ko te hoahoa tukanga hou e tata ana ki te whakauru i te hoahoa whakahaere mai i te tīmatanga. Ka whakaratohia e te ariā pūnaha hihiri he anga mō te whiriwhiri i ngā rautaki whakahaere e ai ki ngā āhuatanga o te tukanga:
– He pai te PID mō ngā koropiko takitahi maha, engari me whakarite kia rite ki te τ me te θ.
– He whai hua te whakahaere i te rerenga wai ina he tere te whakararuraru ka taea te whakahaere e te koropiko tuarua.
– Ka whai hua te whāngai whakamua mēnā ka taea te ine i te whakararuraru, ā, he pai hoki te tauira hihiri.
– He tino pai te Mana Matapae Tauira (MPC) i roto i ngā pūnaha maha-taurangi me ngā here (hei tauira, ngā rohe pāmahana, te pēhanga), nā te mea e whakamahi ana i ngā tauira hihiri hei matapae i ngā urupare ā meake nei.
I te wāhanga hoahoa, ka taea e te whakatauira hihiri te whakamātautau i ngā rautaki whakahaere i mua i te hanganga o te tipu, ka whakaiti i te mōrearea o te whakaritenga roa me te utu nui.
9. Te whakatauira hihiri hei taputapu hoahoa
Mena ka whakautua e ngā tataunga āhua-pūmau "he aha te kaha me ngā tikanga whakahaere?", ka whakautua e te whakatauira hihiri "me pēhea te neke o te tukanga mai i tētahi āhua ki tētahi atu." Mā te whakamahi i tētahi whakatauira hihiri, ka taea e ngā kaihoahoa te aromatawai:
– ngā āhuatanga tīmatanga/whakamutu,
– te urupare ki ngā pakaru o te papu, ki ngā pakaru rānei o te pouaka whakamatao,
– te taunekeneke i waenga i ngā waeine (pou-whakarewa-whakapūmau),
– ngā whakaritenga mō te pūnaha raka me te pūnaha tiaki.
Ka āwhina hoki te whakatauira hihiri ki te whakawhanake i ngā tikanga whakahaere me te whakangungu kaiwhakahaere (whakatauira whakangungu kaiwhakahaere/OTS), kua whakaatuhia e tēnei hei whakaiti i ngā hapa tangata.
Whakamutunga
He tūāpapa nui te ariā pūnaha hihiri mō te hoahoa tukanga nā te mea ka mahi ngā ahumahi o te ao tūturu i raro i ngā āhuatanga e huri haere tonu ana. Mā te mārama ki ngā tauira hihiri, ngā pūmau wā, te wā mate, te pumau, me ngā whanaungatanga whakauru-āhua-putanga, ka taea e ngā kaihangarau te hoahoa i ngā tukanga ehara i te mea he pai te āhua pumau anake, engari he haumaru hoki, he pumau, he ngāwari ki te whakahaere, ā, he rite ki te tu atu i ngā raruraru. Mā te whakauru i te hoahoa tukanga me ngā rautaki tātari hihiri me te whakahaere mai i te tīmatanga ka hua ake he tipu pono ake, he wā tono poto ake, me te kounga hua pumau ake.
Ki te hiahia koe, ka taea e au te whakarerekē i tēnei tuhinga ki tētahi horopaki motuhake (hei tauira, ngā ahumahi matū, ngā tukanga koiora, ngā ahumahi pūngao rānei) ka tāpirihia rānei he tauira tātaitanga hihiri māmā (CSTR, tāke taumata, whakawhiti wera rānei) kia pai ake ai te hangarau.
