Terms Of Dimensional Stability Research Articles

Comparison of different 3D printers in terms of dimensional stability by image data of a dry human mandible obtained from CBCT and CT.

To manage the mandibular traumas, for the expression of the complex anatomy or pathology in education of health sciences related branches, a model of the traumatized mandible is indispensable. For these, different 3D-print-technologies can be used. The aim of this study is, to measure how close these 3D-printed-models are to human-mandible (trueness) and the effectiveness of CT and CBCT at this point. One-dry-human-mandible and 10-models manufactured by five different 3D-printers in four different-kinds of additive-manufacturing technology (Fused-Deposition-Modeling (FDM), Stereolithography (SLA), Binder-jetting (BJ), Polyjet (PJ)) were used, five-anatomic-landmarks and eight-distances were measured and evaluated. Mandible's data were constructed based on DICOM-3.0 data from CBCT and CT scans. Images were opened in MIMICS (software-program). Study compared the devices that produced models with the same dry human-mandible. It was seen that the model with the highest margin of error (132.5 mm) was manufactured by Fused-deposition-modeling device using CT-data. In terms of distance to real-data, the model with the lowest error was generated by Binder-Jetting (ZCorp) with CBCT-data. Models produced with CBCT-data are closer to dry-human-mandible than models with CT-data. The current study shows that CBCT generates significantly better data than CT in producing mandibular models. The first choice for manufacturing of human mandible is BJ and the second choice is the technology of SLA.

Fluorinated Sulfonated Poly(ether sulfone)‐Based Poly(3,4‐ethylenedioxythiophene) Dispersion: A Hole Transport Layer Material in Organic Solar Cells

AbstractHere the synthesis of poly(3,4‐ethylenedioxythiophene) (PEDOT) aqueous dispersion using sulfonated poly(ether sulfone) (SPES) with hydrophobic fluorinated groups to improve the weather and water stability of the conductive film is reported. The conductivity and surface morphology of the fabricated PEDOT:SPES conductive thin films are investigated. The PEDOT:SPES film after the N,N‐dimethylformamide (DMF) treatment showed a 200 times increase in the conductivity and the transmittance is over 96.5%. Raman spectroscopy indicates conformational changes in PEDOT chains due to the solvent treatment. The PEDOT:SPES film shows better water and weather stability performance in terms of dimensional stability in comparison to the commercial PEDOT:poly(styrene sulfonic acid) (PSS). Further, the organic solar cells performance is tested using PEDOT:SPES as hole transport layer and poly(3‐hexylthiophene) (P3HT):[6,6]‐phenyl C71‐butyric acid methyl ester (PC71BM) as active material. The PEDOT:SPES achieves a good power conversion efficiency (=3.36%), comparable with the conventional PEDOT:PSS (AI 4083).

Radial variation in anatomical wood characteristics and physical properties of Paulownia elongata x Paulownia fortunei hybrid Cotevisa 2 from fast-growing plantations

The trend of increasing demand for wood raw material is becoming of great global concern. Fast-growing plantations, such as those of Paulownia, are being established in different parts of the world, as a viable alternative to quickly produce quality wood at competitive costs. The presence and proportion of juvenile wood directly influences the capacity and possibilities of industrial transformation for sawn timber, veneer or plywood for furniture, construction or packaging purposes. The objective of the research is to analyze the radial variation of physical and anatomical characteristics of Paulownia elongata x fortune hybrid Cotevisa 2 wood from fast-growing plantations. A sample of 14 trees from a seven-year-old plantation established in Valencia (Spain) with a planting frame of 4 m × 4 m was used. Although there is no data from subsequent rings to the 6th, the obtained results indicate that from the 5th year of growth, the wood of Paulownia elongata x fortunei Cotevisa 2 could stabilize in some key parameters such as the radial growth of the rings, the structure and proportion of the vessels, the structure of the cell wall, the density of the material and the behavior in terms of dimensional stability in the drying process. Thus, for practical purposes, we can indicate that the transition from juvenile wood to mature wood can begin from the 5th year of growth. Enlarging the rotation in few years reduces significantly the presence of juvenile wood and contributes to improve the roundwood quality for added-value solid wood products.

Vitrification of Iron Oxide Rich Sludge Resulted from the Groundwater Treatment as New Glass Ceramic Materials

This paper offers a new solution to vitrify the sludge resulted from washing the filters used for iron removal phase of the groundwater treatment process. The new glass ceramic materials, obtained after heat treatment at three different temperatures: 800, 900 and 1000 oC were characterized in terms of dimensional stability after firing, apparent density and porosity, hydrolytic stability and iron ions immobilization capacity. The effect of the calcined sludge amount upon the mentioned properties was analysed.

Evaluation of radiodensity and dimensional stability of polymeric materials used for oral stents during external beam radiotherapy of head and neck carcinomas

PurposeIntraoral stents protect the healthy tissues from ionizing radiation during external beam radiotherapy reducing mucositis, hyposalivation and osteoradionecrosis.This study investigated the radiodensity and dimensional stability of polymeric materials for suitability in construction of intraoral stents and aimed to provide clinical guidelines. MethodsSpecimens were fabricated using 4 material types namely, resin composite (ProTemp-PRO), polymethylmethacrylate (PMMA) (Enamel Temp Plus-ETP, Palapress-PAL, TAB 2000-TAB), polycaprolactone (Orfit-ORF) and silicone (Adisil-ADI, Lab Putty-LAB, Memosil2-MEM, Optosil-OPT, President Plus-PRE, Siolaplast A-SIA).They were randomly assigned to measuretheir radiodensity inHounsfield Units(HU)(12x12x11mm3) (Nradiodensity = 66; n = 6)using a computer tomograph (CBCT,Toshiba Aquillon LB scanner)at baseline and after 6 weeks. The scanning protocol was applied with and without single energy metal artifact reduction (SEMAR) scans using a slice thickness of 1 and 5 mm.The same materials have been tested for their dimensional stability (µm3)at baseline, 1, 6, 12, 24 h, 3 and 6 weeks(14 × 4 × 2 mm3)(Ndimension = 55; n = 5 per material) using stereolithography (STL) files generated by a lab scanner (L2i, Imetric4D, Courgenay, Switzerland) and analyzed using a matchingsoftware(Geomagic ControlX 2020,3D Systems).Data were analyzed using a paired t-test (alpha = 0.05). ResultsRadiodensity values (HU) were significantly affected by the material classification (p < 0.05).Polycaprolactone(43.6) presented significantly lower HU valuesfollowed by PMMA (91.3–414.9) than those of silicone materials (292.8–874.5). In terms of dimensional stability (µm3), PMMA materials (Δ:1.53–2.68) andresin composite (Δ:2.89)were significantly more dimensionally stable compared to those of silicone materials(Δ:13.64–6.63)andpolycaprolactone (Δ:-0.76) and (p < 0.05). ConclusionFor fabricating intraoral stents, when reducedradiodensity valuesarerequiredpolycaprolactone could be recommended as it fulfils the requirements for reduced radiodensity and dimensional stability. Among all silicone materials,OPT and MEMcan be recommended based on the low HU and dimensional stability.

Investigation of Dimensional and Physical Properties of Eri Silk Bi-Layer Knit Fabrics for Active Wear Applications

The knitwear industry caters to the needs of the modern youth, whose preferences vary according to the trends and tastes of the modern age. This paper endeavors to demonstrate that active wear fabrics made of eri silk have very good physical properties. The main objective of this research is to investigate dimensional and physical properties of plated interlock, mini-flatback rib, and flatback rib structures developed with two different yarn counts (30s and 40s). The dimensional and physical properties of those samples are investigated in terms of dimensional stability, spirality, bursting strength, elongation percentage, fabric areal density, and fabric thickness. Variables such as yarn count and knit structure play a significant role on the dimensional and physical properties of the fabric.

Influence of the amount of calcium sulfate on physical/mineralogical properties and carbonation resistance of CSA-based cements

Binary and ternary binders, Calcium SulfoAluminate (CSA) clinker plus anhydrite (A) and blends of Portland cement, CSA clinker, and A, respectively, are examined in order to understand the effect of the A/CSA clinker ratio (A/CSA) on hydration process, physico-mechanical properties and durability against carbonation. The study revealed that: (i) in binary systems the increase of the A/CSA has a positive influence on the physical performance, but worsens the resistance against carbonation (ii) in ternary systems a non-linear behavior related to the physical aspects is observed, being the system with the intermediate A/CSA the best performer in terms of dimensional stability and carbonation resistance.The effect of carbonation on the hydrate phase assemblage was studied through a multi-technique approach and results were supported by thermodynamic models, indicating that the optimal dosage of sulfates is strictly dependent on the carbonation exposure and the ternary systems are more durable than the binary ones.

High-level hierarchical morphology reinforcing covalent adaptable networks

High-level hierarchical morphology reinforcing covalent adaptable networks

The Characterisation And Water Equivalency Of Rhizophora Spp. Particleboard Bonded With Soy Protein

The objective of this study was to explore the potential of particleboard made from a type of mangrove hardwood, i.e. Rhizophora spp., bonded with soy protein, and evaluate its suitability as a water-equivalent material. First, the bark of the raw hardwood was removed from its trunk prior to the grinding process. Next, three particleboards were fabricated with different percentages of soy protein (0 %, 8 %, and 16 %). The fabricated particleboards were each characterised for their density, mechanical properties, effective atomic number, morphological structure, elemental composition, and probability of photon interaction. The dimensional stability of each fabricated particleboard was evaluated according to the Japanese Industrial Standard (JIS) A 5908, Type-8, while the other properties were compared with that of the standard water phantom. There were improvements shown by the fabricated particleboards with 8 % and 16 % soy protein, in terms of dimensional stability. The morphological images also revealed that the particleboards bonded with 8 % and 16 % soy protein, have better contact between the particles, compared to the one bonded with 0 % soy protein. The elemental analysis, effective atomic number, and probability of photon interaction of the fabricated phantom showed identical results with that of the standard water phantom. Based on the findings of this study, the Rhizophora spp. particleboard bonded with soy protein has opened up possibilities for another potential alternative of solid phantom material as water-equivalent material.&#x0D;

Friction-Induced Recycling Process for User-Specific Semi-Finished Product Production

Modern forming processes often allow today the efficient production of complex parts. In order to increase the sustainability of forming processes it would be favorable if the forming of workpieces becomes possible using production waste. At the Chair of Forming and Machining Technology of the Paderborn University (LUF) research is presently conducted with the overall goal to produce workpieces directly from secondary aluminum (e.g., powder and chips). Therefore, friction-based forming processes like friction spinning (or cognate processes) are used due to their high efficiency. As a pre-step, the production of semi-finished parts was the subject of accorded research work at the LUF. Therefore, a friction-based hot extrusion process was used for the full recycling or rework of aluminum chips into profiles. Investigations of the recycled semi-finished products show that they are comparable to conventionally produced semi-finished products in terms of dimensional stability and shape accuracy. An analysis of the mechanical properties of hardness and tensile strength shows that a final product with good and homogeneously distributed properties can be produced. Furthermore, significant correlations to the friction spinning process could be found that are useful for the above-mentioned direct part production from secondary aluminum.

Comparative analysis of different impression techniques in relation to single tooth impression.

It is of interest to compare the accuracy of three different impression techniques for a single tooth impression. We used 3 groups with 15 samples each in this study. Group 1: Putty and light body in a sectional stock tray; Group 2: Monophase and extra light body in a sectional stock tray; Group 3: Matrix impression technique. 15 impressions were taken of a prepared tooth on a typodont with each technique. The dimensions of the casts poured from these impression techniques were compared with the control typodont tooth. Data analysis shows that the matrix impression technique gave the best results in terms of dimensional study followed by monophase and extra light body impression technique and putty and light body impression technique gave the least accurate results. The results show that there is a statistically significant difference between the three impression techniques in terms of dimensional stability. Data analysis shows that the matrix impression technique gave the best results in terms of dimensional study followed by monophase and extra light body impression technique and putty and light body impression technique gave the least accurate results. The variations between the groups are within acceptable limits. Hence, it can be concluded that all the impression techniques will result in adequate dimensional stability and can be used in clinical scenarios.

Suitability of a lignin-derived mono-phenol mimic to replace phenol in phenol-formaldehyde resin for use in wood treatment

Abstract The goal of this study was to assess the suitability of a single mono-aromatic for substitution of petroleum-based phenol for phenol-formaldehyde (PF) resin synthesis and the usage of a new resin for wood treatment. After proper thermal decomposition of wood-based lignin, pyrolysis oil can be obtained. Due to the heterogeneity of the lignin macromolecule, oil contains large variety of organic-based compounds, mainly mono-aromatics, which are proposed to be used for replacement of phenol during PF resin synthesis. Therefore, for this purpose, nine of the most abundant mono-aromatic compounds in bio-oil were selected: ortho-, meta-, para-cresol, guaiacol, catechol, 4-methylcatechol, resorcinol, syringol, 4-ethylphenol and resol-type resin from each mono-aromatic were synthesized. Relevant features of the resin such as pH, viscosity, average molecular weight and curing behavior of resins using differential scanning calorimetry (DSC) were analyzed. Scots pine (Pinus sylvestris L.) sapwood samples were used to evaluate the suitability of resin for wood treatment in terms of dimensional stability and were compared with the PF resin-treated wood. From all tested resins, those made of guaiacol or ortho-, or meta-, or para-cresol and/or 4-ethylphenol proved to be suitable for wood treatment, whereas resins made of catechol or 4-methylguaiacol and syringol did not. Suitability of mono-aromatics for synthesis of resol-type resin depends on chemical structure, where the reactivity of the mono-aromatic (derivative of hydroxybenzene) is defined by the type, location and number of substituents.

Comparison of Accuracy/Dimensional Stability of High-Rigid Vinyl Polysiloxane, Polyvinyl Siloxane, and Polyether Impression Materials in Full Arch Implant-Supported Prosthesis: In Vitro Study.

The aim of this study was to evaluate the accuracy/dimensional stability of High-rigid vinyl polysiloxane, polyvinyl siloxane, and polyether impression materials in full arch implant-supported prosthesis. Custom acrylic trays were made on a stone replica of the reference die. Two groups were present in this study: splinting and nonsplinting. A total of 30 samples of 15 for each group were made. Impressions were made and poured with type IV dental stone to obtain experimental casts and were evaluated for dimensional stability and accuracy by measuring with a coordinate measuring machine (CMM) in three dimensions (X, Y, and Z), and a verification jig was fabricated to check the accuracy both clinically and radiographically. Differences in measurements were analyzed using independent t-tests, analysis of variance, and chi-square tests. In terms of dimensional stability, the lowest mean deviation was found in casts made from open tray splinting and nonsplinting and within the impression materials (p > 0.05). But, significant differences (p > 0.05) were obtained with splinting over nonsplinting in terms of accurate fit of the verification jig. This study concludes that polyether material showed less deviation from the reference model, followed by High-rigid VPS and PVS. As results were statistically not significant, all the three impression materials can be used for making full-arch implant-supported prostheses. Splinting obtained more accurate casts over nonsplinting.

Finding dimensional stability considering deflection effects in cylindrical plunge grinding

In spite of the existence of several models to effectively design grinding cycles, they are not frequently adopted in production lines, due to the lack of knowledge, difficulties in determining some input parameters and discrepancies observed in the obtained results during the production of a batch of parts. This paper proposes a contribution to the modeling and simulation of cylindrical plunge grinding cycles in terms of dimensional stability of the process, prediction of the workpiece diameter along the grinding cycle and the minimum required spark-out time, incorporating into the model grinding tolerance limits according to the chosen capability scenario. The prediction of the part diameter and the spark-out time in a cylindrical plunge grinding operation is the key parameter to design optimized grinding cycles. The proposed model covers typical fast grinding cycles in industry, in which the spark-in time is not long enough to guarantee that at its end, the real workpiece radius reduction speed is very close to the programmed feed rate. In the proposed model, the remaining radial stock to be removed during the spark-out stage is designed to be equal to or lower than the tolerance limit for the grinding operation, but considering different scenarios of capability index: barely capable process (Cp= 1); capable (Cp= 1.3); and six-sigma quality level (Cp= 2.0). The minimum spark-out time necessary to reduce the total radial stock to the specified capability limit is calculated by the simulation. Experimental plunge cylindrical grinding tests were performed in which the reduction in the workpiece diameter was measured using an in-process diameter gauge, varying the in-feed velocity and the spark-out time. As a result, a reasonable compromise between the proposed theoretical model and the experimental data was achieved. The dependency of the “time constant” and the in-feed speed was demonstrated for fast spark-in cycles. It was also observed that longer spark-out times will be needed to achieve tighter capability indexes for a given in-feed speed and “time constant” value.

Combined Chemical Modification of Bamboo Material Prepared Using Vinyl Acetate and Methyl Methacrylate: Dimensional Stability, Chemical Structure, and Dynamic Mechanical Properties.

Acetylation and in situ polymerization are two typical chemical modifications that are used to improve the dimensional stability of bamboo. In this work, the combination of chemical modification of vinyl acetate (VA) acetylation and methyl methacrylate (MMA) in situ polymerization of bamboo was employed. Performances of the treated bamboo were evaluated in terms of dimensional stability, wettability, thermal stability, chemical structure, and dynamic mechanical properties. Results show that the performances (dimensional stability, thermal stability, and wettability) of bamboo that was prepared via the combined pretreatment of VA and MMA (VA/MMA-B) were better than those of raw bamboo, VA single-treated bamboo (VA-B), and MMA single-treated bamboo (MMA-B). According to scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) analyses, VA and MMA were mainly grafted onto the surface of the cell wall or in the bamboo cell lumen. The antiswelling efficiency and contact angle of VA/MMA-B increased to maximum values of 40.71% and 107.1°, respectively. From thermogravimetric analysis (TG/DTG curves), the highest onset decomposition temperature (277 °C) was observed in VA/MMA-B. From DMA analysis, the storage modulus (E’) of VA/MMA-B increased sharply from 15,057 Pa (untreated bamboo) to 17,909 Pa (single-treated bamboo), and the glass transition temperature was improved from 180 °C (raw bamboo) to 205 °C (single-treated bamboo).

Dimensional Stability of SBR-Modified Cementitious Mixtures for Use in 3D Additive Construction

This study experimentally investigated the dimensional stability of SBR (styrene butadiene rubber)-modified cementitious mixtures in order to determine whether their properties are sustainable as a 3D additive construction material. Dimensional stability refers to resistance to material deformation caused by changes in internal relative humidity and temperature. Hence, drying and thermal shrinkage, which are the primary factors affecting dimensional stability, were tested. The mixing ratio of SBR-modified cementitious mixtures was determined based on a predetermined optimal flow of 70% ± 1% applicable for 3D additive construction applications. The results of this study showed that the elastic modulus, and drying shrinkage strain, excluding the coefficient of thermal expansion, all significantly improved as the SBR/cement ratio increased. In particular, drying shrinkage can be a disadvantage in 3D additive construction because drying in the printed mixtures is rapid due to the large specific exposure area of moldless construction. Consequently, mitigating drying shrinkage is very important. The elastic modulus, drying shrinkage, and coefficient of thermal expansion were all found to be associated with the dimensional stability obtained in this study. It was concluded that using SBR-modified cementitious mixtures was advantageous in terms of dimensional stability.

Optimizing Cold Compression Deformation to Remove Residual Stresses in Die Forged Disc of Al-Mg-Si Alloy

Quenching residual stresses in Al-Mg-Si alloy forged disc were balanced via cold deformation compression method. In this experiment firstly, the forged disc of Φ210x52 mm was prepared from extruded stock material of Φ160x90 mm through close die forging technique. Next, the forged discs were quenched in water and cold compressed immediately. Finally, the discs were artificial aged to finish in T652 temper. Close die forging and cold compression deformation was performed on a 1200 Ton hydraulic forging press. The amount of cold compression deformation was varied from 2.0 to 5.0% to gauge the optimum level of cold compression for the removal of quenching residual stresses. The residual stresses were measured in terms of dimensional stability of the machined component. Results showed that the 3.8% cold compression deformation was the optimized value for the work piece geometry under investigation. Further, the effect of cold (room temperature) and hot water (~60°C) quenching on the residual stresses was also studied and compared with that of cold compression method.

Three -dimensional fabrics based on double weave and their structure rules

The diversity that we are currently witnessing in textile products is only a prelude to a new millennium with all the technological trends and innovations that have been shown, as a result, modern technologies have emerged in the textile industries, which have occupied the top positions in the strategic areas, so that the process of textile development has become an aesthetic engineering construction process that meets the different requirements of modern designs through the modern trends of textile construction in that it is a three dimensional object, it is possible to control the composition of its structures by changing its structural dimensions at one level or more and thus changing its properties, it is possible to produce fabrics of different weight and thickness and can be formed, not only the use of woven to the areas of decoration, but also to produce specialized textiles, and the three-dimensional fabric that the thread is oriented not only in the direction of the surface, but also towards the thickness of the fabric, resulting in an increase in the strength of the thickness and the hardness of the fabric produced. The availability of different design tools with the great diversity of the possibility of producing three dimensional woven allows the possibility of designing new products from a variety of simple installation to complex, three-dimensional fabrics are a type of fabric that is manufactured by modifying the traditional textile mechanisms, it plays an important role in the production of special-purpose fabrics, textile products of increasing use in high performance fields, which are included in various industrial applications such as reinforcement compounds that are used in various fields (construction, automotive, marine applications, space, aviation…and other applications), although there is a wide range of geometric and textile variables, the three-dimensional stereogram gave designers and engineers only the attention they deserve, in the last quarter of last century or more accurately in the past 20 years due to the tremendous progress in modern high performance textile fibers. Therefore, the research aims at studying the three-dimensional technical fabrics and their types and studying the properties of these fabrics and their structural methods, which are based on a double fabric due to its structural form and characteristics, thus allowing the researchers to produce three-dimensional fabrics with high performance efficiency. Research problem: The lack of studies and research that include the three-dimensional fabrics, its methods of construction, its applications and uses, despite the importance of this type of fabrics, as this study opens the field for researchers to produce high-performance three-dimensional fabrics. Research goals: Studying the structural style of the double fabric and developing it up to the production of three-dimensional fabrics. The opportunity to identify the new horizons in the use of three-dimensional fabrics based on the fabric of double provides the opportunity to produce high quality technical fabrics. Knowledge of modern methods of implementation of three-dimensional fabrics. Research methodology: Descriptive and analytical. Research results: The three-dimensional fabrics are fabrics which the thickness of the cloth represents a legal value just as the length or width of the cloth, and the difference between the two and three dimensional structures is to put strings in the third direction which is the direction of the thickness. The three-dimensional solid bonding fabric is made by combining the thread sets in the three directions, the threads are threaded longitudinally in the (X) direction, and width in the (Y) direction and vertical in the (Z) direction which is responsible for the events of strength and hardness as well as the thickness in the structure of the textile is similar to the brick mold. Woven 3D fabrics can be classified based on type of 3D structures into: 3D Solid: there are three types of 3D solid (multi-layer, orthogonal, angel interlocked), these fabrics are the most popular as they not only provide the thickness but provide internal bonding through the thickness, which prevents the separation of layers in the composite materials. 3D Hollow: (flat surface, uneven surface). 3D Shell: (by differential take-up, by weave combination, by moulding, by Origami way to make a square structure). 3D Nodal. Noobing three-dimensional fabrics: are divided into interlocking and non-interlocking "uniaxial and multiaxial" This gives the three-dimensional fabrics more advantages than other two- dimensional fabrics in terms of dimensional stability, light weight, the acquisition of all the characteristics of modern fibers which used in weaving, flexibility and diversity of design, use as a means of strengthening composite materials, bearing damage factors, low manufacturing costs due to low manpower intensity in manufacturing operations.

Milling of Fir-Tree Slots in Allvac 718 plus

For the machining of profiled grooves in turbine discs made out of nickel based alloys, broaching is still state of the art. However, the broaching process entails some disadvantages like high costs and long delivery times for the machine tools and the broaches in combination with inflexibility with regard to the groove geometry and machining task. An alternative to the broaching process is the integration of the profile slotting on a 5-axis milling center. This paper deals with an approach for machining a fir-tree slot via different milling process chains. The two roughing strategies, ceramic side milling and carbide end milling, are depicted with regard to tool wear and the economy. The finished fir-tree slot will be evaluated in terms of dimensional stability. In addition, the possibility of finish broaching on a five-axis machine tool is shown.

Power spectrum optimization in the design of multisine manoeuvre for identification purposes

In this paper, two sets of multisine signals are designed for system identification purposes. The first one is obtained without any information about system dynamics. In the second case, the a priori information is given in terms of dimensional stability and control derivatives. Magnitude Bode plots are obtained to design the multisine power spectrum that is optimized afterwards. A genetic algorithm with linear ranking, uniform crossover and mutation operator has been employed for that purpose. Both designed manoeuvres are used to excite the aircraft model, and then system identification is performed. The estimated parameters are obtained by applying two methods: Equation Error and Output Error. The comparison of both investigated cases in terms of accuracy and manoeuvre time is presented afterwards.