PurposeThe purpose of this paper is to optimize the downrange for hypersonic
boost‐glide (HBG) missile under near‐real condition, and to validate the
suitability of proposed wall cooling materials.Design/methodology/approachThe
trajectory optimization problem is characterized by a boost phase followed by a
glide phase. A multi‐phase trajectory optimization tool is adopted to optimize
the downrange... hiện toàn bộ
The mechanism of stress formation in glass under‐going conditions of rapid
cooling, and the factors affecting the properties of the toughened glass
produced are discussed. The application of techniques for measuring the
temperature of glass, to the control and study of the toughening process are
described.
PurposeThe purpose of this paper is to apply a factorization‐based control
system design procedure to design of auto‐pilot
systems.Design/methodology/approachThe design approach is based on a previously
developed factorization‐based control system design procedure. The design
approach requires a stable coprime factorization of the plant, a set of stable
coprime factors that are solutions to the Be... hiện toàn bộ
The horizontal stream 9 of exhaust gases coming from the gas turbine, which
flows out of the lateral openings 3 and 4 for torque compensation, is used for
driving an additional small turbine connected to an airscrew 8 with horizontal
axis by the gearing 5. The deflector vanes 6, 7 are opened by control means when
the aircraft has reached a certain forward velocity.
A design study is carried out for an air cushion vehicle based on a
specification giving it a performance comparable with cars of similar power and
size, and compatible with current road conditions. Preliminary examination of
requirements leads to the adoption of a plenum chamber lift system and ducted
fan propulsion, powered by a single piston engine. Care is taken to provide the
vehicle with the... hiện toàn bộ
ROTOR blades on modern high performance helicopters are no longer entirely made
of metal. New composit blades —made partly from carbon reinforced plastics —
have enabled huge advances in rotor blade design. By freeing designers from the
constraints of metal construction, performance has already been improved by 40
per cent. Composite rotor blades require low maintenance, are fatigue tolerant
and o... hiện toàn bộ