Latest news with #ActaAeronauticaetAstronauticaSinica
India.com
13-05-2025
- Science
- India.com
This country claims to have built fastest weapon; can destroy any location on earth in 30 minutes, not US, Russia, the weapon is...
This country claims to have built fastest weapon; can destroy any location on earth in 30 minutes, not US, Russia, the weapon is... China has always had the upper hand in terms of technology, whether it is making superfast trains or weapons. The country is also conducting new research and developments in the defence sector every day. Recently, Beijing has claimed to have developed a technology through which it can destroy its enemy anywhere on Earth in just 30 minutes. Britain and the United States are also chasing the technology and need five more years to develop such a technology that will defy this claim of the Dragon. Recently, researchers of People's Liberation Army Rocket Force have claimed that they have developed a hypersonic missile that can travel at a speed of 13,000 miles per hour. It means that the deadly missile can target any location across the world within 30 minutes. The report was published in China's academic journal Acta Aeronautica et Astronautica Sinica.
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Business Standard
22-04-2025
- Science
- Business Standard
Landing stealth J-36 jets on moving carriers? China's new tech may solve it
China is developing an advanced control system aimed at enabling the safe and accurate landing of its sixth-generation stealth fighter, the J-36, on moving aircraft carriers. According to a research paper published in the peer-reviewed Acta Aeronautica et Astronautica Sinica - China's leading aviation journal, the system is being designed by the AVIC Chengdu Aircraft Design and Research Institute in collaboration with the Nanjing University of Aeronautics and Astronautics, the South China Morning Post (SCMP) reported. The J-36, an unconfirmed designation in line with China's military aircraft naming convention, is a tri-engine, tailless flying-wing jet. It was spotted in flight over Chengdu in December, generating significant interest in global defence circles due to its stealth features, large payload capacity, and potential for long-range strikes. Challenges in landing J-36 stealth jet The J-36 has been designed to have a tailless stealth flying design, but in doing so, it creates flight control problems — notably on aircraft carrier landings. Conventional aircraft use their tail sections and horizontal stabilisers to stabilise pitch and in terms of overall aerodynamic stability. However, flying-wing aircraft lack such horizontal stabilisers, so control is provided by other surfaces that include elevons, spoiler-slot deflectors, and pitch flaps. These can get in their own way, causing destabilizing aerodynamic forces. Another major challenge is the 'ship-airwake effect', which refers to the turbulent airflow generated by an aircraft carrier in motion. This can seriously throw off a jet's flight path during the final approach, especially when the sea is rough and the carrier deck is moving. To tackle this, researchers have created a 'direct force control' system. It separates flight path adjustments from the jet's orientation, allowing real-time control of lift without changing the aircraft's pitch. The technology uses Jacobian matrices to calculate how small changes in control surfaces influence aerodynamic forces, bypassing the need for older, less accurate aerodynamic databases. The system also integrates a Fixed-Time Disturbance Observer (FTDO) — a module adapted from robotics—that detects and neutralises cross-coupling effects between control surfaces. The FTDO operates within seconds, even under rough simulated sea conditions with wave heights of up to six metres. How will the system help carrier-based operations? The new control system was tested through multiple simulated landings under extreme conditions, including crosswinds, turbulent airwakes, and dynamic deck movements, SCMP said. In each scenario, the aircraft was able to land with minimal altitude error—just two centimetres in some tests. Across all sea conditions, most touchdown points fell between the second and third arresting wires, showing a high level of consistency and precision. The system also includes 3D thrust vectoring and drag rudders built into the wings—features that help maintain control even when conventional methods fall short. Spoiler-slot deflectors manage airflow over the rear of the aircraft, helping preserve stability in unpredictable situations. How does China's tech differ from the US? Unlike the US Navy's Magic Carpet system, which relies on pre-set gain schedules for standard aircraft, the Chinese approach treats each control surface as a dynamic element. That means the system can adapt on the fly, using fast, efficient algorithms to constantly recalculate inputs—giving pilots much more stability during the final, critical moments of landing. What's next for the Chinese J-36 stealth fighter? The research is still in the developmental phase, but it represents a major step towards enabling China's sixth-generation aircraft to operate from aircraft carriers in deep-sea theatres. The team behind the system has indicated that the next phase will involve improving the robustness of the control architecture, especially under scenarios involving failure or damage to key components, SCMP said. This development aligns with China's broader naval ambitions, which include expanding the People's Liberation Army Navy's ability to project power far from the mainland. By enabling stealth-capable, high-payload aircraft like the J-36 to operate from carriers, China aims to boost its maritime strike capabilities and strategic deterrence.
The Star
22-04-2025
- Science
- The Star
China's J-36 design team unveils aircraft carrier landing system for sixth-gen stealth jet
The designers of China's J-36 stealth fighter are working on a computer system that will help pilots achieve the difficult and dangerous manoeuvre of landing a sixth-generation jet on a moving aircraft carrier, according to a research paper. The tri-engine, tailless flying-wing behemoth sent shock waves through global defence circles when it was spotted in December soaring over the mega city of Chengdu in southwest China. Along with unprecedented stealth capabilities, the fighter – unofficially dubbed the J-36 in line with the naming convention for other Chinese military planes – boasts a blended fuselage design and enough power to potentially carry missiles for long-range strikes. Do you have questions about the biggest topics and trends from around the world? Get the answers with SCMP Knowledge, our new platform of curated content with explainers, FAQs, analyses and infographics brought to you by our award-winning team. A paper published last month in China's top aviation journal, the peer-reviewed Acta Aeronautica et Astronautica Sinica, showed that the J-36 design team is in the early stages of making a naval variant suitable for use with the PLA Navy's growing fleet of aircraft carriers. The flying-wing problem Tao Chenggang, deputy chief designer of the AVIC Chengdu Aircraft Design and Research Institute, said in the paper that the risk to pilots trying to land a sixth-generation plane on a carrier was 'extremely high'. Carrier-based flying-wing aircraft face a critical challenge: their radical design, which eliminates traditional tail sections for stealth and aerodynamic efficiency, makes precise landings difficult. Without horizontal stabilisers, the planes also struggle to maintain pitch control. Redundant control surfaces – such as elevons, pitch flaps, and spoiler-slot deflectors – often interfere with one another, generating destabilising forces. According to the paper, another headache for the design team to overcome was the 'ship-airwake effect' – the disruption caused by the turbulent air that swirls behind an aircraft carrier and can violently disrupt flight paths. Despite the difficulties, China must solve this problem, Tao wrote. 'The deployment of stealth-capable flying-wing aircraft with superior payload capacity aboard carriers holds profound strategic significance, as it could dramatically enhance a navy's operational capabilities.' A radical fix In collaboration with the Nanjing University of Aeronautics and Astronautics, Tao and his team are pioneering a breakthrough technology that involves some critical innovations, the paper said. The researchers have developed a 'direct force control' system that decouples flight path adjustments from the aircraft's posture, allowing pilots to tweak lift directly without destabilising pitch. According to the paper, the system calculates control surface adjustments in real-time through Jacobian matrices – a mathematical model for mapping micro-deflections to changes in force – enabling it to bypass 'imperfect' aerodynamic databases. Tao and his colleagues, who noted that reliance on these databases was a chronic weakness of older systems, turned to a tailor-made module, known as a Fixed-Time Disturbance Observer (FTDO), which is often used in advanced robotic systems. The FTDO detects and neutralises cross-coupling effects between control surfaces in seconds, using algorithms inspired by quantum mechanics. During simulations, it withstood synthetic airwakes mimicking very rough sea conditions with waves of up to six metres (19ft 8.2in), according to the study. The Chinese solution integrates 3D thrust vectoring with novel surfaces like 'drag rudders' embedded in the wings, in contrast to the US Navy's Magic Carpet system, designed for conventional tails, the researchers noted. During landings, spoiler-slot deflectors modulate airflow over the rear flaps, preserving control authority even in some unplanned flight conditions, the paper said. Simulation results The system was tested across a large number of simulated landings under extreme conditions – including strong crosswinds and high deck heaves – and displayed uncanny precision, according to the team. The researchers conducted 30 simulated landings for each of three different sea conditions, featuring varying ship airwakes and deck motions. The tests showed the system could help a pilot to reduce altitude error to just two centimetres during strong turbulence. 'The landing dispersion results indicate that nearly all touchdown points were clustered between the second and third arresting wires across all three sea states,' they wrote. 'This further demonstrates that direct force control effectively suppresses disturbances from both ship airwakes and dynamic deck movements, enabling precise landings for flying-wing configuration aircraft.' Beyond Magic Carpet While drawing parallels to the US Navy's Magic Carpet software – which simplified carrier landings for F/A-18 Super Hornet pilots – the Chinese engineers stressed that there were critical differences between the two systems. Where Magic Carpet used preprogrammed gain schedules for tails and flaps, the Chinese system treated every surface as a dynamic variable. When thrust vectoring interacted with, say, pitch flaps, the Jacobian matrix recalculated optimal deflections at much higher speeds, thanks to its efficient algorithms, they said. Looking forward Much work remains to be done, but the research suggests that China's ambition is for its sixth-generation fighters to be able to operate in blue waters far from the Chinese mainland. 'Following the completion of preliminary exploratory designs, the next phase of work will focus on optimising the control architecture to enhance robustness under control surface failure scenarios,' the paper said. 'These efforts aim to develop a practically viable precision landing methodology, ultimately laying the foundation for deploying such tailless configurations on naval carriers.' More from South China Morning Post: For the latest news from the South China Morning Post download our mobile app. Copyright 2025.
South China Morning Post
22-04-2025
- Science
- South China Morning Post
China's J-36 design team unveils aircraft carrier landing system for sixth-gen stealth jet
The designers of China's J-36 stealth fighter are working on a computer system that will help pilots achieve the difficult and dangerous manoeuvre of landing a sixth-generation jet on a moving aircraft carrier, according to a research paper. Advertisement The tri-engine, tailless flying-wing behemoth sent shock waves through global defence circles when it was spotted in December soaring over the mega city of Chengdu in southwest China. Along with unprecedented stealth capabilities, the fighter – unofficially dubbed the J-36 in line with the naming convention for other Chinese military planes – boasts a blended fuselage design and enough power to potentially carry missiles for long-range strikes. A paper published last month in China's top aviation journal, the peer-reviewed Acta Aeronautica et Astronautica Sinica, showed that the J-36 design team is in the early stages of making a naval variant suitable for use with the PLA Navy's growing fleet of aircraft carriers. The flying-wing problem Tao Chenggang, deputy chief designer of the AVIC Chengdu Aircraft Design and Research Institute, said in the paper that the risk to pilots trying to land a sixth-generation plane on a carrier was 'extremely high'.
Al Bawaba
03-04-2025
- Business
- Al Bawaba
China develops first silent supersonic passenger plane
Published April 3rd, 2025 - 06:47 GMT ALBAWABA – The Commercial Aircraft Corporation of China (COMAC), a Chinese state-owned aerospace manufacturing company, is developing the first silent supersonic passenger plane. Also Read China successfully launches new data transmission satellite New C949 supersonic passenger plane According to Acta Aeronautica et Astronautica Sinica, a Chinese monthly journal, COMAC, a Chinese state-owned company, is currently developing a supersonic passenger aircraft with low noise levels. The company is working on its new C949 supersonic passenger plane, which will be slower than the legendary Concorde, but it will be 20 times quieter, allowing it to fly over populated areas with minimal disturbance. C949 aircraft will be equipped with artificial intelligence (AI) technologies to help maintain stability during flight. (Comac) Other sources revealed that the new C949 aircraft could be launched by 2049. The new supersonic passenger plane will feature an elongated nose and a specially designed midsection to absorb shock waves. As a result, the aircraft will emit less noise when flying at high the C949 aircraft will be equipped with artificial intelligence (AI) technologies to help maintain stability during flight. The aircraft will also feature approximately seven fuel tanks with a total capacity of 42 tons. According to the company, the C949 will be able to fly at speeds of up to Mach 1.7 (1,805 km/h), slower than the Concorde, which previously flew at approximately Mach 2. However, the new aircraft will have a 50% greater range—capable of flying from Shanghai to Los Angeles in just five hours. Also Read China's Manus AI can generate a 'Zelensky-White House Debate' game © 2000 - 2025 Al Bawaba (
