83results about How to "Monitor and evaluate health status" patented technology

The invention relates to a health monitoring method used for a cable system in a cable structure which carries out a plurality of mechanical calculations based on the mechanical calculation benchmark model of a structure; the calculation times are equal to the quantities of the cables. In each calculation, one cable is supposed to have unit damage; the result for each calculation forms vector for calculating a current cable force; a cable force change vector is obtained by using the vector for calculating the current cable force to subtract an initial cable force vector; all the cable force change vectors form a cable force change identity matrix. The noninferior solution of the current damage vector of the cable can be fast calculated by utilizing proper arithmetic such as multi-target optimizing arithmetic according to the approximating linear relation of the current cable force vector (formed by all the current cable forces that are actually detected), the cable force change identity matrix, a unit damage scalar and the current cable damage vector (formed by all the current damage quantities), thus being capable of more accurately confirming the position and the damage degree of the damaged cable.

The invention provides a progressive health monitoring method for a cable system based on hybrid monitoring during generalized displacement of a support. Whether a mechanics calculation benchmark model of the structure requires to be updated against is decided by monitoring of a generalized coordinates of the structural support; considering the similar linear relationship among the current data vector of the monitored quantity and the initial value vector of the monitored quantity, the unit damage monitored quantity change matrix and the current nominal damage vector, in order to overcome the defects, a method using the linear relationship to approach the nonlinear relationship by section is adopted so that a large section is divided into a plurality of continuous small sections; the linear relationship in each small section is sufficiently accurate; and suitable algorithms such as a multi-objective optimization algorithm and the like can be utilized in each small section so as to calculate the non-inferior solution of the damage vector of the current cable, thus exactly determining the position and the damage degree of a damaged cable.

The invention relates to an incremental health monitoring method in a cable system of a cable structure based on hybrid monitoring, which takes that linear relation between current value vectors of values to be monitored and initial value vectors of the values to be monitored, and the linear relation between unit damage value change arrays of the values to be monitored and current nominal damage vectors are similar into consideration on the premise of taking various parameters as values to be monitored, in particular when damaged cables are more or damage extent is larger, the linear relation characteristic is more obvious. In order to overcome the defect, the invention provides a method for using the linear relations to perform piecewise approximation on nonlinear relations based on the hybrid monitoring, divides a large interval into a plurality of continuous small intervals; in the small intervals, the linear relations are accurate enough and proper algorithms such as multiobjective optimization algorithm are utilized to calculate noninferior solutions of current cable damage vectors, and then positions of the damaged cables and the damage extent of the cables are determined accurately.

The invention discloses a health monitoring system of a cable system in a cable structure on the basis of strain monitoring; a plurality of times of mechanical calculation is carried out on the basis of the reference model of the mechanical calculation of a structure, the times of the calculation is equal to the number of cables. Supposing that only one cable has unit damage during each calculation, the calculation result of each time constitutes a current strain calculation vector; a strain change vector is obtained by that each current strain calculation vector minus an initial strain vector; all the strain change vectors constitute a unit damage strain change matrix. According to the similar linear relation between the current strain vector (constituted by the current measured strain of all the given points) and the initial strain vector, the unit damage strain change matrix, an unit damage scalar and a current cable damage vector (constituted by current damage amount of all cables), the noninferior solution of the current cable damage vector can be figured out fast by utilizing the suitable algorithms of multi-objective optimization algorithm, etc., therefore, the position and the degree of damage of the damaged cable can be determined accurately.

The invention relates to a health monitoring method for the cable system of cable structure, based on hybrid monitor, comprising that: based on the mechanical calculation reference model of the structure, the method processes a plurality of mechanical calculations while the calculation number equals to the cable number, wherein each calculation assumes that only one cable has units damaged and each calculation attains a calculation present digit vector of the monitored value (the following texts omits the description of the monitored value); each calculation present digit value is subtracted with an initial digit vector to obtain a digit variable vector; all digit variable vectors form an unit damage monitored value digit variable matrix. By calculating the similar linear relationship among the present digit vector with the initial digit vector, the unit damage monitored value variable matrix, the unit damage scalar and the present cable damage vector (formed by all cable present damage quantity), the non-inferior solution of the present cable damage vector can be calculated by a suitable algorism as multi-object optimization algorism and the like, thereby accurately finding the position of a damaged cable and the damage degrees thereof.

The invention relates to an incremental health monitoring method in a cable system of a cable structure based on angular coordinate monitoring, which takes that linear relation between current value vectors of values to be monitored and initial value vectors of the values to be monitored, and the linear relation between unit damage value change arrays of the values to be monitored and current nominal damage vectors are similar into consideration on the premise of taking angular coordinates as values to be monitored, in particular when damaged cables are more or damage extent is larger, the linear relation characteristic is more obvious. In order to overcome the defect, the invention provides a method for using the linear relations to perform piecewise approximation on nonlinear relations based on the angular coordinate monitoring, divides a large interval into a plurality of continuous small intervals; in the small intervals, the linear relations are accurate enough and proper algorithms such as multiobjective optimization algorithm are utilized to calculate noninferior solutions of current cable damage vectors, and then positions of the damaged cables and the damage extent of the cables are determined accurately.

The invention discloses a progressive method for identifying loose support cable based on strain monitoring during support settlement, which is based on strain monitoring, and identifies the loose support cable through monitoring a structure support coordinate, taking into account the approximate linear relationship between the current value vector of the monitored-volume and the initial value vector of the monitored-volume, the virtual unit damage monitored-volume value change matrix and the current nominal damage vector. For overcoming the diadvantage, the invention provides the method which means that the linear relationship is segmented to be close to the non-linear relationship, therefore, the virtual damaged cable can be identified; after the real damaged-cable is identified through a non-damaged test method, the remained virtual damaged-cable is the loose support cable, and the cable length needing adjusting can be determined according to the relationship between the loose degree and the virtual damaged degree.

The invention relates to a progressive health monitoring method for a cable system in a cable structure on the basis of cable tension monitoring. On the premise of taking cable tension as the monitored value, the progressive health monitoring method considers that linear relations among a current value vector of a monitored value, an initial value vector of the monitored value, a value change matrix of the unit damage monitored value and a current nominal damage vector are approximate, and particularly nonlinear relation characteristics between the vectors are more obvious when the number of damaged cables is numerous or the damage degree is larger. The invention provides the method for piecewise approximation of nonlinear relations by the linear relations on the basis of cable tension monitoring in order to overcome the defects. The method splits a large section into a plurality of continuous subsections; the linear relations in each subsection is accurate enough; and a non-inferior solution of a current cable damage vector can be calculated in each subsection by a proper algorithm such as a multiobjective optimization algorithm, so that the position and the damage degree of a damaged cable can be accurately determined.

The invention relates to a method for identifying loose supporting ropes based on space coordinate monitoring during support settlement, which is based on the space coordinate monitoring and determines whether a mechanical calculation reference model of a structure needs to be updated or not by monitoring the coordinates of a support of the structure. Only when the coordinates of the support of the structure are changed, the mechanical calculation reference model of the structure is updated, thereby obtaining a novel mechanical calculation reference model of the structure, which is reckoned in the support settlement of the structure. On the basis of the model, a change matrix of the unit damage quantity to be monitored is obtained by calculation. According to an approximately linear relationship among the current vector of the strain, the initial vector of the strain, a change matrix of the virtual unit damage strain and the current virtual damage vector, virtual damaged ropes can be calculated and identified, and the residual virtual damaged ropes are just loose ropes, i.e. ropes the rope force of which needs to be regulated after a true damaged rope is distinguished by using a nondestructive examination method, so that the rope length which needs to be regulated can be determined according to a relationship between the looseness degree and the virtual damage degree.

The invention provides a progressive health monitoring method of cable system based on mixed monitoring in the presence of support seat settlement. Whether a mechanical calculation standard model with a re-updated structure is needed or not is determined on the basis of the mixed monitoring through monitoring the coordinates of a structure support seat, the fact that the current monitored value vectors have the approximate linear relationship with the monitored initial vector, the unit damage monitored quantity change matrices and the current nominal damage vector is taken into consideration. In order to overcome the defect, the invention provides a method for piecewise approximation to the non-linear relationship by using the linear relationship, a large interval is divided into small continuous intervals, the linear relationship in the small intervals is accurate enough, proper algorithms of the multi-objective optimization algorithm and the like can be utilized in each small interval for calculating the noninferior solution of the current cable damage vector, and thereby, the position and the damage degree of the damaged cable can be accurately determined.

The invention relates to a progressive type method for identifying loose supporting ropes based on space coordinate monitoring during support settlement, which is based on strain monitoring and is used for identifying the loose supporting ropes by monitoring the coordinates of a support of a structure. In consideration of the condition that a linear relationship among the vector of the current numerical value of the quantity to be monitored, the vector of the initial numerical value of the quantity to be monitored, a change matrix of the numerical value of the virtual unit damage quantity to be monitored and a current nominal virtual damage vector is approximate, the invention provides a method using the linear relationship to sectionally approach to a nonlinear relationship in order to overcome the defect, virtual damaged ropes can be identified, and the residual virtual damaged ropes are just the loose supporting ropes after a true damaged rope is distinguished from the virtual damaged ropes by using the methods of nondestructive examination and the like, so that the rope length which needs to be regulated can be determined according to a relationship between the looseness degree and the virtual damage degree.

The invention relates to a progressive method for distinguishing a slack supporting cable based on cable force monitoring during support settlement; when the method is used for distinguishing the slack supporting cable based on the cable force monitoring by the coordinates of the support of a monitoring structure, the method considers that the linear relationship between the current numerical value vector of the monitored quantity and the initial numerical value vector of the monitored quantity, the numerical value changing matrix of the virtual unit damage monitored quantity and the current nominal damage vector is approximated; in order to overcome the defect, the invention provides a method which piecewise approximates to the non-linear relationship by using the linear relationship and can distinguish the virtual damage cable; after the true damage cable is distinguished by using methods such as a nondestructive testing method and the like, the remaining virtual damage cable is the slack supporting cable; and the length of the cable needing to be regulated can be determined according to the relationship between the slack degree and the virtual damage degree.

The invention discloses a method for identifying a loose supporting cable based on angle monitoring during support settlement, which is based on angle monitoring, and determines whether to update a mechanical calculation baseline model of the structure through monitoring a structure support coordinate; the mechanical calculation baseline model of the structure is updated only when the structure support coordinate changes, thereby a new mechanical calculation baseline model which is included in the structure of the structure support settlement is obtained, and a unit damage monitored-volume change matrix is calculated and obtained on the basis of the model. According to the approximate linear relationship between the strain current vector and the strain initial vector, the virtual unit damage strain change matrix, and the current virtual damage vector, the virtual damaged cable can be calculated and identified, after the real damaged-cable is identified through a non-damaged test method, the remained virtual damaged cable is the loose cable, the cable force of which needs adjusting, and the cable length needing adjusting can be determined according to the relationship between the loose degree and the virtual damaged degree.

The invention relates to a healthy monitoring method of a rope system based on angle monitoring during support settlement, which is based on the angle monitoring and determines whether a mechanical calculation reference model of a structure needs to be updated or not by monitoring the coordinates of a support of the structure. Only when the coordinates of the support of the structure are changed, the mechanical calculation reference model of the structure is updated, thereby obtaining a novel mechanical calculation reference model of the structure, which is reckoned in the support settlement of the structure. On the basis of the model, a change matrix of the unit damage quantity to be monitored is obtained by calculation. According to an approximately linear relationship existing among the vector of the current numerical value of the quantity to be monitored, the initial vector of the quantity to be monitored, the change matrix of the unit damage quantity to be monitored, a unit damage scalar and the current damage vector to be resolved of the rope system, the non-inferior solution of the current rope damage vector can be quickly calculated by utilizing the proper algorithms of a multi-objective optimization algorithm and the like, so that the position of a damaged rope and the damage degree thereof can be more accurately determined during the support settlement.

The invention discloses a hybrid monitoring based cable system health method applied in supporting seat generalized displacement. The need of updating a mechanical calculation reference model of a structure is decided by monitoring the supporting seat generalized coordinates of the structure, based on hybrid monitoring, and the mechanical calculation reference model of the structure is updated only when the supporting seat generalized coordinates of the structure vary, so that a new mechanical calculation reference model of the structure included in the supporting seat generalized coordinates of the structure is obtained, and a unit damage monitored quantity variance matrix is obtained by calculating on the basis of the model. A noninferior solution of a current cable damage vector can be calculated quickly with appropriate algorithms such as a multi-target optimization algorithm and the like according to approximate linear relations between a current numeric vector of a monitored quantity and an initial vector of the monitored quantity, the unit damage monitored quantity variance matrix, a unit damage scalar quantity and a cable system current damage vector to be resolved, so that the position and damage degree of the damaged cable can be determined accurately relatively when supporting seat generalized displacement occurs.

The invention relates to a progressive type healthy monitoring method of a rope system based on space coordinate monitoring during support settlement, which is based on the space coordinate monitoring and determines whether a mechanical calculation reference model of a structure needs to be updated again or not by monitoring the coordinates of a support of the structure. In consideration of the condition that a linear relationship among the vector of the current numerical value of the quantity to be monitored, the vector of the initial numerical value of the quantity to be monitored, a change matrix of the unit damage quantity to be monitored and a current nominal damage vector is approximate, the invention provides a method using the linear relationship to sectionally approach to a nonlinear relationship in order to overcome the defect, a big interval is divided into a plurality of continuous small intervals, the linear relationship is accurate enough in each small interval, and the non-inferior solution of the current rope damage vector can be calculated in each small interval by utilizing the proper algorithms of a multi-objective optimization algorithm and the like, so that the position of a damaged rope and the damage degree thereof can be more accurately determined.

The invention discloses a space coordinate monitoring based cable system health monitoring method applied in supporting seat generalized displacement. The need of updating a mechanical calculation reference model of a structure is decided by monitoring the supporting seat generalized coordinates of the structure, based on space coordinate monitoring, and the mechanical calculation reference model of the structure is updated only when the supporting seat generalized coordinates of the structure vary, so that a new mechanical calculation reference model of the structure included in the supporting seat generalized coordinates of the structure is obtained, and a unit damage monitored quantity variance matrix is obtained by calculating on the basis of the model. A noninferior solution of a current cable damage vector can be calculated quickly with appropriate algorithms such as a multi-target optimization algorithm and the like according to approximate linear relations between a current numeric vector of a monitored quantity and an initial vector of the monitored quantity, the unit damage monitored quantity variance matrix, a unit damage scalar quantity and a cable system current damage vector to be resolved, so that the position and damage degree of the damaged cable can be determined accurately relatively when supporting seat generalized displacement occurs.

The invention discloses a progressive health monitoring method of a cable system based on strain monitoring during support settlement, which is based on strain monitoring, determines whether to re-update a mechanical calculation baseline model of the structure through monitoring a structure support coordinate, taking into account the approximate linear relationship between the current value vector of the monitored-volume and the initial value vector of the monitored-volume, the unit damage monitored-volume change matrix and the current nominal damage vector. For overcoming the disadvantage, the invention provides the method which means that the linear relationship is segmented to be close to the non-linear relationship; in the method, a large interval is divided into consecutive small intervals, the linear relationship in each of the small intervals is accurate enough, the non-inferior solution of the current cable damage vector can be calculated in the small intervals through the multi-objective optimization algorithm and other appropriate algorithms, accordingly, the location and the damage degree of the damaged-cable can be determined accurately.

The invention discloses a cable force monitoring based damaged cable recognizing method applied in the supporting seat generalized displacement. The need of updating a mechanical calculation reference model of a structure is decided by monitoring the supporting seat generalized coordinates of the structure, based on cable force monitoring, and the mechanical calculation reference model of the structure is updated only when the supporting seat generalized coordinates of the structure vary, so that a new mechanical calculation reference model of the structure included in the supporting seat generalized coordinates of the structure is obtained, and a unit damage monitored quantity variance matrix is obtained by calculating on the basis of the model. A noninferior solution of a current cable damage vector can be calculated quickly with appropriate algorithms such as a multi-target optimization algorithm and the like according to approximate linear relations between a current numeric vector of a monitored quantity and an initial vector of the monitored quantity, the unit damage monitored quantity variance matrix, a unit damage scalar quantity and a cable system current damage vector to be resolved, so that the position and damage degree of the damaged cable can be determined accurately relatively when supporting seat generalized displacement occurs.

Based on the step-by-step type health monitoring method for the cable system in the cable structure of spatial coordinate monitoring, while using the spatial coordinate as monitored quantity, considering the approximation of the linear relation between the current numerical vector of the monitored quantity and the initial numerical vector of the monitored quantity and the linear relation between the unit damaged monitored quantity numerical value change matrix and the current nominal damaged vector, where, while more cable is damaged and / or the damaged degree is larger, the non-linear relation characteristics of the above qualities are more obvious, the invention provides a method for approaching the non-linear relation using linear relation based on spatial coordinate monitoring, which comprises: dividing the large interval into continuous small intervals ensuring the above linear relation in each small interval is accurate enough, calculating out the noninferior solution of the current cable damage vector in each small interval by a proper algorithm such as multiple-objective optimization, and accordingly, the position and damage degree of the damaged cable can be determined accurately.

The invention relates to a method for identifying untensioned support cables based on mixed monitoring in the presence of support seat settlement. Whether a mechanical calculation standard model with an updated structure is needed or not is determined on the basis of the mixed monitoring of various kinds of parameters through monitoring the coordinates of a structural support seat, and the structure of the mechanical calculation standard model needs to be updated only when the coordinates of the structure support seat are changed, so a novel mechanical calculation standard model with the structure metered into the settlement of the structure support seat is obtained, and the unit damage monitored quantity change matrices are obtained through the calculation on the basis of the model. According to the approximate linear relationship of the strain current vector and the strain initial vector, virtual unit damage strain change matrices and current virtual damage vector, virtual damaged cables are calculated and identified. The reset virtual damaged cables are untensioned cables, i.e. cables needing cable force regulation after actual damaged cables are identified by a nondestructive detection method, and the cable length needing to be regulated can be determined according to the relationship between the untensioned degree and the virtual damage degree.

The invention provides a progressive health detecting method for a cable system in a cable structure based on straining detection, which considers that the linear relations among a current numerical vector of a detected vector, an initial numerical vector of the detected vector, a numerical variation matrix of a unit damaged detected vector and a current nominal damaged vector are similar on the premise that straining is the detected vector, particularly when damaged cables are more and have large damage extent, the non-linear relations among the vectors have more obvious characteristics. In order to overcome the defect, the invention provides the method for piecewise approximating the non-linear relations by the linear relations based on straining detection, divides a large section into a plurality of continuous small sections, makes the linear relationsenough accurate in each small section, and can calculate a noninferior solution of the current cable damaged vector by a multiobjective optimization algorithm and other proper algorithms in each small section, thereby accurately determining the position of a damaged cable and damage extent thereof.

The invention discloses a method for identifying a loose supporting cable based on strain monitoring during support settlement, which is based on strain monitoring, and determines whether to update a mechanical calculation baseline model of the structure through monitoring a structure support coordinate; the mechanical calculation baseline model of the structure is updated only when the structure support coordinate changes, thereby a new mechanical calculation baseline model which is included in the structure of the structure support settlement is obtained, and a unit damage monitored-volume change matrix is calculated and obtained on the basis of the model. According to the approximate linear relationship between the strain current vector and the strain initial vector, the virtual unit damage strain change matrix and the current virtual damage vector, the virtual damaged cable can be calculated and identified, after the real damaged-cable is identified through a non-damaged test method, the remained virtual damaged cable is the loose cable, the cable force of which needs adjusting, and the cable length needing adjusting can be determined according to the relationship between the loose degree and the virtual damaged degree.

The invention relates to a progressive type healthy monitoring method of a rope system based on angle monitoring during support settlement, which is based on the angle monitoring and determines whether a mechanical calculation reference model of a structure needs to be updated again or not by monitoring the coordinates of a support of the structure. In consideration of the condition that a linear relationship among the vector of the current numerical value of the quantity to be monitored, the vector of the initial numerical value of the quantity to be monitored, a change matrix of the unit damage quantity to be monitored and a current nominal damage vector is approximate, the invention provides a method using the linear relationship to sectionally approach to a nonlinear relationship in order to overcome the defect, a big interval is divided into a plurality of continuous small intervals, the linear relationship is accurate enough in each small interval, and the non-inferior solution of the current rope damage vector can be calculated in each small interval by utilizing the proper algorithms of a multi-objective optimization algorithm and the like, so that the position of a damaged rope and the damage degree thereof can be more accurately determined.

The invention discloses a health monitoring method of a cable system based on strain monitoring in the angular displacement of a supporting seat. Based on the strain monitoring, a mechanical calculation reference model of a structure is determined whether to be updated or not necessarily again through monitoring an angular coordinate of the supporting seat of the structure; only when the angular coordinate of the supporting seat of the structure changes, can the mechanical calculation reference model of the structure be updated, so as to obtain a new mechanical calculation reference model of the structure reckoning in the angular displacement of the supporting seat of the structure; and on the basis of the model, a unit damage change matrix of a monitored quantity is calculated and obtained. According to the approximate linear relations existing among a current numerical vector of the monitored quantity, an initial vector of the monitored quantity, the unit damage change matrix of the monitored quantity, a unit damage scalar quantity and a current damage vector of the cable system to be solved, the non-inferior solution of the damage vector of a current cable can be calculated quickly by utilizing proper algorithms such as a multi-objective optimization algorithm and the like, and therefore, the position of a damaged cable and the damage degree of the damaged cable can be determined more accurately when the angular displacement of the supporting seat exists.

The invention provides a progressive method for identifying a slack cable on the basis of angle monitoring during support generalized displacement. According to angle monitoring, taking into consideration the fact that linear relationships between the current value vector of the monitored amount and an initial value vector of the monitored amount, a virtual unit damage monitored amount variation matrix and the current nominal virtual damage vector are approximate with each other through monitoring the support generalized coordinate of the structure during identifying the loose supporting cable, the invention provides a method for approaching nonlinear relation in a sectional way by using the linear relationships in order to overcome the defects. By using the method, the virtual damaged cable can be identified; after the real damaged cable is distinguished by using a nondestructive testing method and other methods, the rest virtual damaged cables are loose supporting cables; and then the cable length needing to be adjusted can be determined according to the relationship between the looseness degree and the virtual damage degree.

The method of identifying slack cables based on hybrid monitoring during the angular displacement of the support is based on the hybrid monitoring of multiple types of parameters. By monitoring the angular coordinates of the structural supports, it is determined whether it is necessary to update the mechanical calculation benchmark model of the structure. Only when the angular coordinates of the structural supports occur The mechanical calculation benchmark model of the structure is updated only when it changes, so as to obtain a new mechanical calculation benchmark model of the structure that takes into account the angular displacement of the structural support. Based on this model, the unit damage monitored quantity change matrix is ​​calculated and obtained. According to the approximate linear relationship between the current strain vector and the initial strain vector, the virtual unit damage strain change matrix and the current virtual damage vector, the virtual damaged cable is calculated and identified. After the real damaged cable is identified by the non-destructive testing method, the remaining The virtual damaged cable is the slack cable, that is, the cable whose tension needs to be adjusted, and the cable length to be adjusted can be determined according to the relationship between the degree of relaxation and the degree of virtual damage.

The invention relates to a progressive method for distinguishing a slack supporting cable based on multi-class parameter mixed monitoring during support settlement; when being used for distinguishing the slack supporting cable, the method considers that the linear relationship between the current numerical value vector of the monitored quantity and the initial numerical value vector of the monitored quantity, the numerical value changing matrix of the virtual unit damage monitored quantity and the current nominal virtual damage vector is approximated by the coordinates of the support of a monitoring structure; in order to overcome the defect, a method for piecewise approximating the non-linear relationship by using the linear relationship can distinguish the virtual damage cable; after the true damaged cable is distinguished by using the nondestructive testing method and the like, the left virtual damaged cable is the slack supporting cable; and the length of the cable needing to be regulated can be determined according to the relationship between the slack degree and the virtual damage degree.

The invention discloses a method for the health monitoring of a cable system in a cable structure on the basis of space coordinate monitoring, which carries out a plurality of times of mechanical calculation on the basis of a mechanical calculation benchmark model of a structure, and the calculation time is equal to the number of the cables. In each calculation, supposing that only one cable has unit damage, the results of all the calculation form a vector for calculating the current coordinate; a coordinate change vector is obtained by that each vector for calculating the current coordinate subtracts an initial coordinate vector; all the coordinate change vectors form the coordinate change matrix of the unit damage. According to the approximate linear relationship existing between the current coordinate vector (formed by the current actual measurement coordinates of all specified points) and the initial coordinate vector, the coordinate change matrix of the unit damage, unit damage scalar and the current cable damage vector (formed by all the current cable damage quantity), and by utilizing proper algorithms such as the multi-objective optimization algorithm, etc., the non-inferior solution of the current cable damage vector can be quickly calculated, therefore, the position and the damage degree of the damaged cable can be more accurately determined.

The invention discloses a progressive method for identifying loose support cable based on angle monitoring during support settlement, which is based on angle monitoring, and identifies the loose support cable through monitoring a structure support coordinate, taking into account the approximate linear relationship between the current value vector of the monitored-volume and the initial value vector of the monitored-volume, the virtual unit damage monitored-volume value change matrix and the current nominal damage vector. For overcoming the disadvantage, the invention provides the method which means that the linear relationship is segmented to be close to the non-linear relationship, therefore, the virtual damaged cable can be identified; after the real damaged cable is identified through a non-damaged test method, the remained virtual damaged cable is the loose support cable, and the cable length needing adjusting can be determined according to the relationship between the loose degree and the virtual damaged degree.