They come from many sources and are not checked. Under these standard conditions, the nominal power of solar panels can be compared with each other. The aeronautical sense of nominal derives from engineering where the nominal value is the specified dimension and the reference point for tolerances. For example, the Free Dictionary gives seven: [Middle English nominalle, of nouns, from Latin nōminālis, of names, from nōmen, nōmin-, name; see nō̆men- in Indo-European roots.]. Thus nominal sizes began to appear. by or as regards name; in name; ostensibly. By 1909, we have the association with performance. Critically they make a point of really understanding the business, its aims and the topic before embarking on … Otherwise this can be seen as just your opinion, and we try to give answers with some kind of authoritative reference. (ˈnɑmənli) adverb. Its use is clearly not in line with its etymologocal roots. English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. Sci-fi film where an EMP device is used to disable an alien ship, and a huge robot rips through a gas station, Removing creases from an oil painting canvas, arXiv article says that code has been made available with the article, but I cannot find it. If it fits then it can be called by that name - it is nominally such a thing. Some things called a given name do not, in some sense, seem to really correspond to what one thinks of as what that name means. I do not have a factual answer to this question but I hope I can direct the search towards an answer. This answer is correct, if a little long-winded. How did “party” come to mean “gathering”? When one purchases lumber from lumber yards or home improvement stores (e.g. a temperature of 25°C at the solar cells; In other words, the Peak Power is a specific feature of your PV system, regardless of the location where it is tested. From an engineering point of view there is no need to consider whether they are within tolerances or not that is agiven part of the engineering. How to use nominal in a sentence. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. > Q: Why do they say "nominal" instead of “normal” when they launch rockets? 124 An example of misuse is our use of the word ‘nominal’, which most of the English-speaking world interprets as meaning small, minimal-and we usually use it in the sense of being average or normal. I am a control systems engineer and, although I am not a sapce engineer, like many engineers I am faced with the use of the word nominal in specifications. Doubts related to speed of sound in different mediums. This is a measure for the relative length of the optical path through the atmosphere. It was a supposition not an answer. It can also be named as systematic and organized brainstorming sessions organized in a company so that the creativity of every member can be used, and every member of the group is given equal and fair chance to present their … I would say it derives from definition 4. In addition, while, The question here is: "How and when did definition #4 arise?". browning meat in Dutch oven--why doesn't it work for me? there is deviation (as there must be from any expected value when measuring real things), but it is small enough to be a deviation in name only. The objective is to linearize the model around this nominal trajectory. You suggest it is because it is a platonic ideal, which is in name only, but that seem kind of oxymoronic in that in this case it is NOT in name only, but also in practice. The point is this: Use of the word nominally in such contexts emphasizes the possibility or actuality of a discrepancy between (a) the meaning of the name as formally or defined or as normally/conventionally understood and (b) the meaning of some individuals or occurrences that are classified under that name. Check out the pronunciation, synonyms and grammar. nominal trajectory Rieko Osu 1 ,* , Ken-ichiMorishi ge 2 ,* , Jun Nakanishi 3 , HiroyukiMiyamoto 4 & MitsuoKawato 1 Humans are capable of achieving complex tasks with redundant degrees of freedom. To learn more, see our tips on writing great answers. Stigma of virginity and chastity loophole. ,��t}n��� I certainly don't mind corrections. The nominal trajectory is the ideal, planned, intended trajectory (which, in keeping with the definition, exists "in name only" like a platonic ideal). The limit is generally stated by giving the amount that the dimension may be larger or smaller than the nominal size. Assigned to or bearing a person's name: nominal shares. Asking for help, clarification, or responding to other answers. Why do we need NMOS transistors for NAND gate? How did “hearties” come to mean “shipmates”? This is a measure for the relative length of the optical path through the atmosphere. The "2-by-4" and other examples cited so far fit this. click for more detailed Chinese translation, definition, pronunciation and example sentences. By 1900, there were a fair number of "nominal sizing" systems out there, covering areas such as plumbing, arms, and tooling. Nominal Trajectory - The nominal trajectory is the trajectory that the vehicle will fly if all vehicle aerodynamic parameters are exactly as expected, if all vehicle internal and external systems perform exactly as planned, and there are no external perturbing influences (e.g. ��(Ca�I������E�����ms�K)w��� �Q���ߕ1mva�4�Қ��!l#�l��0�~�ӏ��`,�AX�Q�!/��y�?d�ٳ�nN!y�|������`�Ɣ� ��o���4�j�u�ڳ���6r��+봥s~�2���#$����Z��}�xv�i6�lA�%J!0?Q�ӧ�m�a�q���pdl�y��X��]_�mh�r1��f��^tmﳲ*������ܭ��t� ��f����$]G�G��M��}�j�F.|�8�i�1s�M�7 ��a�7�Ɛ�Dr�(J�c�d��38�Z&����yQ���8 ��NN^LH��W�`)\����~F�؏� �m����Z�5:�m��Ⱦ����.��Ϡ��]�*��r�En��O�;�YX3І�z���I��WH�m�>�u_��@lF� &3W�"m#ωgr�u2���/� }.��>��\t+M��W�gA0��3�/ �^B The nominal control u ¯ (t) is assumed to yield a satisfactory nominal trajectory x ¯ (t) whose desirable shape should be preserved in nonnominal situations. Is there any reason to use F flat in notating this blues riff (jazz)? Of, resembling, relating to, or consisting of a name or names. trajectory definition: 1. the curved path that an object follows after it has been thrown or shot into the air: 2. the…. The OED references these sources [Hat tip @tchrist]: 1966 Aviation Week & Space Technology 5 Dec. 30/1 The mission is to launch the 800-lb. Unfortunately, it stuck. Is it influenced by the word "normal"? h�bbd``b`Z$�� ��$V��Z�s!�ebM ��@D9�+ Most of the definitions are clearly from the sense of "names" and "nouns" - and from that idea of something being only in name, but not in reality. How to use trajectory in a sentence. 7�@� Define X T = Φ x, y, z, v x, v y, v z to be function of nominal trajectory, with x as argument and v x, v y, v z, y, z as state variables. R�Dx �U V�8c����0d(# ����� �� ? From their point of view the centrists are only nominally Republican, that is, according the definition of being enrolled in the party. Trajectory optimization is the process of designing a trajectory that minimizes (or maximizes) some measure of performance while satisfying a set of constraints. The word "nominal" has a number of definitions. One solution of the satellite equations is a circular orbit, which has values of: 3 2 r r0 , r 0, , T 0, and r0 (this is Kepler's third law). Since UAS present much more operational flexibility than CPA, Ren et al. This usage in engineering long predates the space program. For my thinking, this connotation comes from the distinction between (a) what something is in name, that is, as set forth in a definition or specification and (b) what a given occurrence of that something is in concrete reality. to mean these values were within the acceptable and expected ranges. ��qtb�jD �Ƌ��D��e��HJ�F���`�>���e�x�rXd�b��\�K����wL��Vw�e^,Ӆ� �9���Evw��_X��ie�� ��*�P�X������m9�s��֍ٚ;]���lu�d��U�m��YQV�iQ����a���{ڌ���������l݁���CS���Cjd+�0:bJ��)�o�tt�/�!doFW��;"b_�ľ�Cbܵ?,ܪnB����'��T;��� Wouldn't it come from definition 4? Although nominal performance literally refers to nameplate data, the phrasing suggests a broadening of the concept beyond that. So anywhere in the world, you could find 3lb, 4lb, 6lb, 8lb, 12lb, etc shot. I would say it is most likely that someone whose mother tongue is not English, once said 'nominal' when they meant to say 'normal'. Citing a reference to support your position would make this a much better answer. A measurement corresponding to the nominal value is "according to plan or design." The development of such an approach, however, requires that the h�T�Oo�0��| In the aerospace industry, to say that something is "nominal" is to say it is within accepted parameters. It's important to note that you are asking about the structure "the trajectory is nominal", not "the nominal trajectory". It can be expanded to "the measured trajectory is in agreement with the nominal trajectory". qh�J=�V�{�C! One of the definitions of "nominal" according to Wikipedia: According to the online eytomology dictionary. Insignificantly small; trifling: a nominal sum. Control Engineering Practice 9 (2001) 699–707 Fuzzy logic based attitude control of the spacecraft X-38 along a nominal re-entry trajectory$ S.-F. Wua,*, C.J.H. Engelenb, Q.-P. Chua, R. Babus$ kab, J.A. One possibility overlooked in the other answers is that although nominal eventually came to mean literally "within normal tolerances", the usage could have been introduced in the sense of "nominal deviation from expected value"; i.e. This is because 2x4's (and most other common stud sizes) are actually half an inch less wide and less thick then specified (to conserve lumber, while still providing sufficient sturdiness). Convex lattice polygons with equal area and perimeter. Thus Step 2: Nameplate description data, associating name with performance or capability ratings. problem tractable, we restrict the motion plan to a nominal trajectory stabilized with a linear estimator and controller. nominal trajectory in Chinese : :标称弹道…. By the 1950's nominal performance had taken on a life of its own as concept encompassing the myriad physical and practical limits of a situation. Central banks pay varying amounts of attention to the path of nominal output, and some—among them the Bank of England—put quite a lot of weight on NGDP. performing or achieved within expected, acceptable limits; normal and satisfactory; Example The mission was nominal throughout. How did an egg and cheese dish come to be known as “Woodchuck(s)”? In my opinion, this nominal value will be of little meaning to a CNC person trying … Space 94 Nominal, a favourite word, meaning within prescribed limits; anything from ‘perfect’ to acceptable. So the idea of a sentence "Height is nominal" is that while the height may not be exactly at [the correct height], it's nominally at [the correct height]? 2. countable noun. Nominal definition, being such in name only; so-called; putative: a nominal treaty; the nominal head of the country. Surprisingly, the sense of nominal used in the preceding definition of tolerance is missing from both the Free Dictionary (via AHD4) and OED3. 1970 R. Turnill Lang. Hence not posting it as such. I work in the Space industry and the use of 'nominal' is very common amongst my non-English colleagues; even in the non-space parts of their lives. It is very likely (but not certainly, thus this being a comment rather than an an answer) and extension of its use in describing parts and so forth. %%EOF During a recent rocket launch, the announcer repeated phrases like "Height is nominal. From bin names (8lb cannon) to 'nameplate with performance implications' (US frigates such as the USS Constitution), to 'performance rating as the name' (100hp motor), to 'this is far too complicated a performance map to use as a name, but it is what defines this particular thing.".
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