TIC 4.0
Stability
- Francisco Blanquer Jaraiz
CONCEPT
Fields | Type | Description | Purpose |
|---|---|---|---|
ID (Concept identifier) | M | stability | GRAMMAR |
Concept name | M | Stability | GRAMMAR |
Concept type | M | activity | GRAMMAR |
Also known as | O | stability; unbalance; tipping stability, instability; firmness, solidness; stableness; steadiness; insecurity | TIC Description |
Definition | M | A subject is said to be in stability if, when displaced from equilibrium (while is idle for static stability and considering the inertia for dynamic stability), it experiences a net force or torque in a direction opposite to the direction of the displacement. | TIC Description |
Further Detail | O | Stability = stable equilibriumhttps://courses.lumenlearning.com/physics/chapter/9-3-stability/ CONCEPT stability = stable equilibrium: A system is said to be in stable equilibrium if, when displaced from equilibrium, it experiences a net force or torque in a direction opposite to the direction of the displacement. A system is in unstable equilibrium if, when displaced, it experiences a net force or torque in the same direction as the displacement from equilibrium. A system in unstable equilibrium accelerates away from its equilibrium position if displaced even slightly. stability torque is the moment (force per distance) you have to apply to move from stable equilibrium to the calculated normative reference value for the specific subject (it depends the type of machine) and a specific scenario (usually actual operation scenario). This value is defined by the manufacturer following the normative if applicable with the safety margin. stability reference: is the stability reference torque for the specific subject and scenario but without any load. stability reference normative: is the normative used to calculate the stability reference value. stability tip is the moment (force per distance) you have to apply to move from stable equilibrium to unstable equilibrium (with no margin). stability type: static or dynamic. It indicates the type of calculation is done for the values. Most of the equipment doesn't have a standard or normative for dynamic stability in case that doesn't exist then the manufacture criteria could be applied. | TIC Description |
Required Information | M | SUBJECT; OBSERVED PROPERTY and VALUE stability_reference_normative; stability_type | TIC Description |
SUBJECT |
| CHE; ; Vessel; |
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POINT OF MEASUREMENT |
| ioutput estimated; actual; performed |
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OBSERVED PROPERTY |
| torque; tip; reference; status; load |
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Value |
| STATUS: We said that stability status is TRUE when the subject is below the reference torque (always in stable equilibrium with the safety margen). We said that stability status is FALSE when the subject is over the stability reference value in a not safety situation (under normative) or unstable equilibrium. VALUEs: stability torque is the moment (force per distance) that must be applied to a subject to change its stability status from TRUE to FALSE. stability torque % is the factor between the stability_torque and stability_reference_torque. stability load is the load weight that the subject can pickup keeping this stability status TRUE.
Value units: stability torque can be measure in any torque unit, example : Nw*m = Newton per meter; T*m = Tons per meter; kg*m = kilograms per meter. Positivies values indicates that is stable equilibrium over the stability reference and negative indicates an unstable equilibrium or between the reference value and the tip value. stability load Ton, Kg, Nw |
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Related standards | O | Crane normative to calculate stability. | TIC Description |
Related TIC 4.0 definition | O | load.weight; load.size; | TIC Description |
Example | M | che.stability.torque.ton_per_meter: 87 = you need to apply a torque of 87 Tons*meter to reach the stability reference value for that specific scenario and CHE. che.stability.tip.ton_per_meter: 400 = you need to apply a torque of 400 Tons*meter to capsize the CHE che.stability.counter: 3 For a period of time defined in the header of the message how many times the stability status has change from False to True. | TIC Description |
Example in the context of the grammar | M | CHE is pickup a load of 10 tons = 60 Tm, in an scenario where it can lift up to 20 tons = 120 Tm with the safety margins or 130Tm without safety margins. che.stability.torque.ton_per_meter: 60 che.stability.tip.value.ton_per_meter: 70 che.stability.reference.ton_per_meter: 120 che.stability.reference.ton_per_meter: 130 che.stability.load.ton: 10 che.stability.reference.ton: 20 che.stability.torque.%: 50
JSON example: {
"msg": {
"id": "",
"sender": "",
"timestamp": "2021-04-23T06:56:37.177Z",
"topic": "",
"destinantion": "",
"creationtimestamp": "2021-04-23T06:56:37.177Z",
"starttimestamp": "2021-04-23T06:56:37.177Z",
"endtimestamp": "2021-04-23T06:56:37.177Z"
},
"che": [
{
"id": "",
"name": "",
"number": 0,
"type": "",
"family": "",
"brand": "",
"model": "",
"stability": {
"status": [
{
"pom": "ioutput",
"pomt": "actual",
"timestamp": "2021-04-23T06:56:37.177Z",
"value": false,
"type": ""
}
],
"duration": [
{
"pom": "ioutput",
"pomt": "actual",
"unit": "seconds",
"timestamp": "2021-04-23T06:56:37.177Z",
"value": 0
}
],
"counter": [
{
"pom": "ioutput",
"pomt": "actual",
"timestamp": "2021-04-23T06:56:37.177Z",
"value": 0,
"type": ""
}
],
"totalcounter": [
{
"pom": "ioutput",
"pomt": "actual",
"timestamp": "2021-04-23T06:56:37.177Z",
"value": 0
}
],
"timer": [
{
"pom": "ioutput",
"pomt": "actual",
"unit": "seconds",
"timestamp": "2021-04-23T06:56:37.177Z",
"value": 0,
"starttimestamp": "2021-04-23T06:56:37.177Z",
"endtimestamp": "2021-04-23T06:56:37.177Z"
}
],
"totaltimer": [
{
"pom": "ioutput",
"pomt": "actual",
"unit": "seconds",
"timestamp": "2021-04-23T06:56:37.178Z",
"value": 0
}
],
"tip": [
{
"pom": "ioutput",
"pomt": "actual",
"unit": "ton_per_meter",
"timestamp": "2021-04-23T06:56:37.178Z",
"value": 0,
"type": ""
}
],
"reference": [
{
"pom": "ioutput",
"pomt": "actual",
"timestamp": "2021-04-23T06:56:37.178Z",
"unit": "ton_per_meter",
"value": 0,
"normative": "",
"type": ""
}
],
"torque": [
{
"pom": "ioutput",
"pomt": "actual",
"unit": "ton_per_meter",
"timestamp": "2021-04-23T06:56:37.178Z",
"value": 0,
"type": ""
},
{
"pom": "ioutput",
"pomt": "actual",
"unit": "%",
"timestamp": "2021-04-23T06:56:37.178Z",
"value": 0,
"type": ""
}
],
"load": [
{
"pom": "ioutput",
"pomt": "actual",
"unit": "ton",
"timestamp": "2021-04-23T06:56:37.178Z",
"value": 0,
"type": ""
}
]
}
}
]
} | TIC Description |
Link to one or more operational processes | M |
| TIC Description |
Search tags | M | #stability; | Technical |
Version / Date | M | 2021.1 - 30/04/2021 | Technical |
Internal TIC Version | M | 20210422 consistency review | Technical |
M = Mandatory
O = Optional
Created by | Edited by | Review / Approve | Published |
@Francisco Blanquer Jaraiz 2020-03-18 |
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| @Francisco Blanquer Jaraiz 2021-04-22 |
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