India successfully achieves autonomous landing of Space vehicle
Bengaluru (PTI): The Indian Space Research Organisation on Sunday successfully conducted the Reusable Launch Vehicle Autonomous Landing Mission (RLV LEX).
The test was conducted at the Aeronautical Test Range (ATR), Chitradurga, Karnataka, the national agency headquartered here said.
"With that, ISRO successfully achieved the autonomous landing of a space vehicle", it said in a statement.
"With LEX, the dream of an Indian Reusable Launch Vehicle arrives one step closer to reality", ISRO said.
In a first in the world, a winged body has been carried to an altitude of 4.5 km by a helicopter and released for carrying out an autonomous landing on a runway.
RLV is essentially a space plane with a low lift to drag ratio requiring an approach at high glide angles that necessitated a landing at high velocities of 350 kmph.
The RLV took off at 7:10 am IST by a Chinook Helicopter of the Indian Air Force (IAF) as an underslung load and flew to a height of 4.5 km (above Mean Sea Level).
Once the predetermined pillbox parameters were attained, based on the RLV's Mission Management Computer command, the RLV was released in mid-air, at a down range of 4.6 km.
Release conditions included 10 parameters covering position, velocity, altitude and body rates, etc. The release of RLV was autonomous. RLV then performed approach and landing maneuvers using the Integrated Navigation, Guidance & control system and completed an autonomous landing on the ATR air strip at 7:40 AM IST.
The autonomous landing was carried out under the exact conditions of a Space Re-entry vehicle's landing high speed, unmanned, precise landing from the same return path as if the vehicle arrives from space.
Landing parameters such as Ground relative velocity, the sink rate of Landing Gears, and precise body rates, as might be experienced by an orbital re-entry space vehicle in its return path, were achieved.
The RLV LEX demanded several state-of-the-art technologies including accurate Navigation hardware and software, Pseudolite system, Ka-band Radar Altimeter, NavIC receiver, indigenous Landing Gear, Aerofoil honey-comb fins and brake parachute system.
LEX utilised several indigenous systems. Localized Navigation systems based on pseudolite systems, instrumentation, and sensor systems, etc. were developed by ISRO.
Digital Elevation Model (DEM) of the landing site with a Ka-band Radar Altimeter provided accurate altitude information.
Extensive wind tunnel tests and CFD simulations enabled aerodynamic characterisation of RLV prior to the flight.
"Adaptation of contemporary technologies developed for RLV LEX turns other operational launch vehicles of ISRO more cost-effective", the statement said.
ISRO had demonstrated the re-entry of its winged vehicle RLV-TD in the HEX mission in May 2016. The re-entry of a hypersonic sub-orbital vehicle marked a major accomplishment in developing Reusable Launch Vehicles.
In HEX, the vehicle landed on a hypothetical runway over the Bay of Bengal. Precise landing on a runway was an aspect not included in the HEX mission.
The LEX mission achieved the final approach phase that coincided with the re-entry return flight path exhibiting an autonomous, high speed (350 kmph) landing.
The LEX began with an Integrated Navigation test in 2019 and followed multiple Engineering Model Trials and Captive Phase tests in subsequent years.
Along with ISRO, IAF, Centre for Military Airworthiness and Certification (CEMILAC), Aeronautical Development Establishment (ADE), and Aerial Delivery Research and Development Establishment (ADRDE) contributed to this test.
The IAF team hand in hand with the Project team and multiple sorties were conducted to perfect the achievement of release conditions.
Secretary in the Department of Space and ISRO Chairman S Somanath was among who witnessed the test.
India 🇮🇳 achieved it!
— ISRO (@isro) April 2, 2023
ISRO, joined by @DRDO_India @IAF_MCC, successfully conducted the Reusable Launch Vehicle Autonomous Landing Mission (RLV LEX)
at the Aeronautical Test Range (ATR), Chitradurga, Karnataka in the early hours on April 2, 2023.
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
Will follow Shinde in any direction he goes: MLA Shirsat on allying with Pawar Sr for CM post
Mumbai, Nov 21: Shiv Sena MLA Sanjay Shirsat on Thursday said his party leaders will follow Maharashtra Chief Minister Eknath Shinde in any direction he goes post-assembly poll results and decisions taken by him will be acceptable to them.
He asserted the party will solidly back Shinde, who heads the Shiv Sena, as it trusts his leadership, comments coming two days ahead of the state assembly poll results.
Asked what if Shinde goes with rival NCP (SP) president Sharad Pawar to become the chief minister for a second time, Shirsat said, "We are committed to (follow) whatever Eknath Shinde decides. We will be solidly with him. We trust him and it will always be there."
The MLA from Chhatrapati Sambhajinagar (West) was responding to the question asked on a TV channel.
Shirsat said Shinde, who took over as CM in June 2022 after revolting against the then leadership of the Shiv Sena, only goes in the "right direction" and this has been the experience of party leaders.
Shirsat was one of the Shiv Sena MLAs who sided with Shinde at the time of the revolt.
Asked about the comments of his ally, BJP leader Pravin Darekar said, "Shirsat's remarks do not reflect the official stance of the party. Eknath Shinde's party contested against Uddhav Thackeray-led Shiv Sena (UBT) and Sharad Pawar's NCP (SP). Such an alliance with the MVA was inconceivable."
The BJP, Shinde-led Shiv Sena and NCP headed by deputy CM Ajit Pawar are members of the ruling Mahayuti alliance. On the other hand, the opposition Maha Vikas Aghadi (MVA) consists of the Congress, Shiv Sena (UBT) and NCP (Sharadchandra Pawar).
Asked what if Shinde is not made the CM again if Mahayuti retains power, Shirsat said, "A decision on this will be taken only by Eknath Shinde. It's his right and we cannot even comment on it. Whatever decision Shinde takes will be acceptable to us."
Voting for the 288-member state assembly concluded on November 20 and results will be declared on November 23.
