Abstract:
PROBLEM TO BE SOLVED: To provide environmentally benign fiber-reinforced composite materials in which the production cost is comparatively inexpensive having lower heat conductivities compared to the other fiber-reinforced composite materials produced with the use of existing carbon fibers, and having superior interfacial adhesion capabilities due to the fiber-reinforced composite materials containing lyocell-based carbon fiber.SOLUTION: More concretely, the fiber-reinforced composite materials have lower heat conductivities compared to the existing fiber-reinforced composite materials produced by polyacrylonitrile-based carbon fiber and pitch-based carbon fibers, etc. and superior in interfacial adhesion capabilities and other material properties such as strength due to the inclusion of lyocell-based carbon fiber and polymeric resins. The fiber-reinforced composite materials are more environmentally benign and can reduce the cost of the production compared to the existing fiber-reinforced composite materials produced by rayon-based carbon fibers which utilize a highly toxic carbon disulfide solvent.
Abstract:
PROBLEM TO BE SOLVED: To provide, in the form of a carbon composite material using a lyocell carbon fiber, a carbon composite material having a heat conductivity lower than those of carbon composite materials manufactured by using extant carbon fibers, excellent in terms of interfacial adhesive strength, etc., requiring low production costs, and environmentally friendly.SOLUTION: A lyocell carbon fiber is a carbon fiber manufactured by carbonizing a lyocell fiber, and it is desirable for the lyocell carbon fiber to have been manufactured to bear a fibrous bar morphology of being coupled with a binder resin. The carbon composite material including the lyocell carbon fiber bearing the fibrous bar morphology is capable, since a mechanical load impressed onto the carbon composite material can be supported directly by the lyocell carbon fiber, of transmitting, in an extremely effective manner, the mechanical load impressed onto the carbon composite material and of phenomenally improving the strength and modulus of the carbon composite material in comparison with a case where a carbon fiber woven fabric or carbon fiber is used as it is.
Abstract:
A FOV(field of view) dependent LOS(line of sight) scan method and apparatus for a turret aided camera system with continuous zoom optics is disclosed. According to this invention, the scan width and rate of the LOS are automatically determined as a function of the FOV selected by the user: scan width = f1(FOV, m) and scan rate = f2(FOV, te) where m is the observation range constant and te is the eye integration time. Moreover, the sensitivity to the FOV can be controlled by adjusting the relevant parameter sets (said m and te), allowing the user to select the scan condition proper to himself. This invention is quite useful for all kinds of turret aided camera system (the IR or day light TV cameras) for reconnoitering application.
Abstract:
Provided are shock waveform synthesis methods for a shock response spectrum over a short time interval, which are used for a shock response spectrum test. For the purpose, the shock response spectrum test is performed by including the steps of: obtaining each time τ k ( k = 1,2,···, M ) at which a maximax value is detected in the response history due to a zero delay wavelet input, wherein a natural frequency of the SDOF system with a Q (quality factor) of 10 equals to the wavelet frequency of the zero delay wavelet input; and establishing each delay time δ k as δ k = τ 1 - τ k ( k = 1,2, ···, M ).
Abstract translation:提供了用于在短时间间隔中的冲击响应谱,它们是用于冲击响应谱测试电击波形合成方法。 为目的,冲击响应谱测试执行通过包括以下步骤:获取每个时间A K(K = 1,2,...,M)在其中在响应历史,检测由于零的最大最大值 延迟小波输入,10 worin单自由度系统的固有频率与Q(品质因数)等于零延迟小波输入的小波频率; 建立和各延迟时间'k作为数k = A 1 - A K(K = 1,2,...,M)。
Abstract:
The present invention relates to a power supply device of a small arms fire control system or a similar small arms system. The device includes a first current limit part for limiting a low current when power is supplied from a battery, a second current limit part for limiting a high current when the power is supplied from the battery, a Zener diode and a boost converter connected to the first and second current limit parts, and adapted to charge the supercapacitor up to a final voltage that will be supplied to a load when the supercapacitor is charged to a predetermined voltage, and a microprocessor for checking a power supply state of the system and a voltage of the supercapacitor in real-time and controlling ON/OFF of the first and second current limit parts used in the system. There are advantages in that power of an overall system can be managed stably and efficiently and a use time of a battery can be increased.
Abstract:
Disclosed is an active sonar system capable of estimating a direction and a range of a target by using a sound pulse. A target range error can be estimated by the active sonar system, by comparing a range determined by applying a multipath eigenray model based on underwater environmental data to a range calculated by multiplying a 1-way target detection time by a reference sound velocity.
Abstract:
The present invention relates to a power supply device of a small arms fire control system or a similar small arms system. The device includes a first current limit part for limiting a low current when power is supplied from a battery, a second current limit part for limiting a high current when the power is supplied from the battery, a Zener diode and a boost converter connected to the first and second current limit parts, and adapted to charge the supercapacitor up to a final voltage that will be supplied to a load when the supercapacitor is charged to a predetermined voltage, and a microprocessor for checking a power supply state of the system and a voltage of the supercapacitor in real-time and controlling ON/OFF of the first and second current limit parts used in the system. There are advantages in that power of an overall system can be managed stably and efficiently and a use time of a battery can be increased.
Abstract:
Provided are shock waveform synthesis methods for a shock response spectrum over a short time interval, which are used for a shock response spectrum test. For the purpose, the shock response spectrum test is performed by including the steps of: obtaining each time τ k ( k = 1,2,···, M ) at which a maximax value is detected in the response history due to a zero delay wavelet input, wherein a natural frequency of the SDOF system with a Q (quality factor) of 10 equals to the wavelet frequency of the zero delay wavelet input; and establishing each delay time δ k as δ k = τ 1 - τ k ( k = 1,2, ···, M ).