A methodology for optimisation design and analysis of stratosphere airship

Abstract

This paper presents a methodology for studying the feasibility of stratosphere airship for high altitude long endurance missions and arriving at the baseline specifications of conventional configuration of stratosphere airship, given the performance and operational requirements. Based on this methodology, the AODAP platform (Airship Optimisation Design and Analysis Platform) was developed. Some innovative concepts used in AODAP that are different from previous methods and codes are presented. The shape optimisation of airship was introduced into the design process, and several optimum objectives can be selected including minimum drag, minimum weight and composite objective based on MDO (Multidisciplinary Design Optimisation). The methodology was validated for other design concepts previously developed for similar missions and also was compared to a low altitude vehicle. The baseline specifications of stratosphere airships designed for various shapes using this methodology are presented. The results of sensitivity analyses for a specified airship are discussed, and the sensitivity of airship length with some critical parameters including area density of envelope fabric, area density of solar cell, efficiency of solar cell and efficiency of fuel cell for the specified shape is also provided.

The numerical simulation research of an Ultra-Light Photovoltaic Cell multilayer composite structure

“…or mesh discretization of the 3D braided composite specimen and rollers. The wall deflects by 3 From which the Young modulus parallel to the X-axis is 111 / σε = E , so Value for δ BD is as follows: So the shear modulus 1 G is given:…”

“…The stratosphere airship with its extensive application prospect in the field of civil and military, become the focus of the current research around the world [1,2]. Solar energy is an ideal choice to provide power for high-altitude and long-endurance airships [3]. At present, the applications of solar battery category mainly have monocrystalline silicon solar cells, polycrystalline silicon and amorphous silicon thin film solar cells.…”

Optimization design of the stratospheric airship’s power system based on the methodology of orthogonal experiment

“…The area of SA is calculated on the condition of the required power p need as shown in Eq. (2) (Colozza, 2003;Wang et al, 2009a;2009b). The required power is determined by the power of all payloads p total , the output efficiency of the discharging unit η discharge , the efficiency of the electrolyzer η electrolyzer , the output efficiency of the fuel cell η FC , and the duration of the night t night .…”

Ceramic engine considerations for future aerospace propulsion

“…A wing/airship arrangement can particularly be found in one of proposed wing/propulsion modules by Liu and Liou (2006), as well as in many envisioned airship concepts for the future (Snodgrass, 2007). Despite the fact that airships are constantly proposed for different missions (Wang et al , 2009; Dorrington, 2005; Newcome, 2006; Folks, 2008; Miller et al , 2005), a basic system engineering perspective reveals that many safety assessment processes associated with airships are more convoluted than airplanes. Different system usage choices at different phases of operation and shared functions between systems are examples of these complexities (Schaefer, 2002).…”