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Ever wondered how engineers model ride comfort? This 2‑DOF quarter‑car simulation compares passive vs active suspension under road excitation — a classic problem in vehicle dynamics and control. From theory → simulation → insight 💡 🔗

MATLAB

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65,205 次观看 • 3 个月前 •via X (Twitter)

教育科学技术汽车交通

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System identification (sysid) is the process of finding the physical parameters that make a simulation match reality. If you're training an RL locomotion policy in simulation, the accuracy of your motor model directly affects how well the policy transfers to the real robot. A recent git commit by Kevin Zakka added a sysid toolbox to MuJoCo which automates this process: you provide recorded motor data and a MuJoCo model, and it optimizes the model parameters to minimize the difference between simulated and real trajectories. For my RobStride Dynamics RS02 QDD motors (17 Nm peak, 7.75:1 gear), I built a Rust tool that sends multi-sine torque excitation at 1 kHz and records position/velocity feedback. I then feed this data into MuJoCo's sysid optimizer.

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Axis Robotics

27,858 次观看 • 7 个月前

THE TESLA MODEL S: THE CAR THAT MADE ELECTRIC VEHICLES SERIOUS When the Model S launched in 2012, the entire world still saw EVs as slow, boring, short-range toys for tree-huggers. The Model S changed that narrative overnight. It wasn’t just an electric car — it was a statement. Here’s why the Model S was so important for EV adoption: • It proved EVs could be faster and better than gas cars 0–60 mph in under 4 seconds (later Plaid versions under 2 seconds) while being completely silent and smooth. It beat most supercars off the line and made “electric” synonymous with performance. • It delivered real long-range capability Over 300 miles of range when most EVs at the time struggled to reach 100 miles. Suddenly, road trips became possible and “range anxiety” started to feel outdated. • It introduced over-the-air updates The first production car that could get major performance upgrades, new features, and safety improvements wirelessly — like a smartphone on wheels. This changed how people think about car ownership forever. • It forced the entire auto industry to respond Legacy manufacturers who had been dragging their feet on EVs suddenly rushed to catch up. The Model S basically lit the fuse for the modern EV revolution. • It made luxury electric desirable Premium interior, massive touchscreen, ridiculous acceleration, and futuristic design turned EVs from “compromise” into “aspiration.” Without the Model S proving that electric cars could outperform and out-luxury gasoline vehicles, we wouldn’t have the Model 3/Y explosion, the Cybertruck, or the flood of competitors now racing to go electric. The Model S didn’t just sell cars. It changed the future of transportation. It took EVs from niche to mainstream and showed the world what was possible.

THE TESLA MODEL S: THE CAR THAT MADE ELECTRIC VEHICLES SERIOUS When the Model S launched in 2012, the entire world still saw EVs as slow, boring, short-range toys for tree-huggers. The Model S changed that narrative overnight. It wasn’t just an electric car — it was a statement. Here’s why the Model S was so important for EV adoption: • It proved EVs could be faster and better than gas cars 0–60 mph in under 4 seconds (later Plaid versions under 2 seconds) while being completely silent and smooth. It beat most supercars off the line and made “electric” synonymous with performance. • It delivered real long-range capability Over 300 miles of range when most EVs at the time struggled to reach 100 miles. Suddenly, road trips became possible and “range anxiety” started to feel outdated. • It introduced over-the-air updates The first production car that could get major performance upgrades, new features, and safety improvements wirelessly — like a smartphone on wheels. This changed how people think about car ownership forever. • It forced the entire auto industry to respond Legacy manufacturers who had been dragging their feet on EVs suddenly rushed to catch up. The Model S basically lit the fuse for the modern EV revolution. • It made luxury electric desirable Premium interior, massive touchscreen, ridiculous acceleration, and futuristic design turned EVs from “compromise” into “aspiration.” Without the Model S proving that electric cars could outperform and out-luxury gasoline vehicles, we wouldn’t have the Model 3/Y explosion, the Cybertruck, or the flood of competitors now racing to go electric. The Model S didn’t just sell cars. It changed the future of transportation. It took EVs from niche to mainstream and showed the world what was possible.

Tesla Owners Silicon Valley

11,056 次观看 • 4 个月前

Breaking news 🗞️ 🚨 Tesla just quietly solved a problem in Australia. The Model X is gone from our market. But the new Model Y L Premium AWD might actually be the closest thing we have to a replacement. And honestly… it makes a lot of sense. ⚡ Tesla Model Y L – Key Specs • 0–100 km/h: ~5.0 sec • Range: ~681 km WLTP • Top speed: 201 km/h • Seating: 6 adults • Supercharging: 250 kW • ~288 km added in 15 min 💰 Australian pricing (before on-road costs) Model Y Long Range AWD → $68,900 Model Y L Premium AWD → ~$74,900 So for roughly $6k more, you get: ✔ 3 rows ✔ 6 seats ✔ Much larger cabin ✔ ~400L extra cargo capacity ✔ Longer wheelbase ✔ Even more range 📊 Quick comparison Model Y Long Range AWD • 5 seats • ~600 km range • 0–100 km/h: 4.8 sec • $68,900 Model Y L Premium AWD • 6 seats • ~681 km range • 0–100 km/h: 5.0 sec • ~$74,900 So performance drops slightly, but practicality goes way up. 🇦🇺 Why this matters in Australia Since Tesla stopped selling the Model X locally, there has been a real gap in the lineup for larger families. The Model Y L doesn’t completely replace the X. You lose things like: ❌ Adaptive air suspension ❌ Driver instrument cluster ❌ Falcon Wing doors ❌ Some luxury interior touches But you still get: ✔ Tesla software ecosystem ✔ Supercharger network ✔ Massive range ✔ Practical 3-row seating And at a much lower price than a Model X ever was. 👨‍👩‍👧‍👦 Who this is perfect for • Growing families • Current Model Y owners needing more space • Former Model X buyers • Anyone considering EV9 / EX90 but wanting Tesla’s ecosystem Personally, as a Model X owner, this is the first Tesla sold in Australia that actually feels like a realistic successor. I’m seriously considering replacing my Model X with the Model Y L, possibly around the end of Q2 or mid-Q3 this year. Not a perfect Model X replacement. But for Australia right now? This might be Tesla’s smartest family vehicle yet. ⚡🇦🇺 ORDER NOW : Tesla Australia & New Zealand Tesla AI

Breaking news 🗞️ 🚨 Tesla just quietly solved a problem in Australia. The Model X is gone from our market. But the new Model Y L Premium AWD might actually be the closest thing we have to a replacement. And honestly… it makes a lot of sense. ⚡ Tesla Model Y L – Key Specs • 0–100 km/h: ~5.0 sec • Range: ~681 km WLTP • Top speed: 201 km/h • Seating: 6 adults • Supercharging: 250 kW • ~288 km added in 15 min 💰 Australian pricing (before on-road costs) Model Y Long Range AWD → $68,900 Model Y L Premium AWD → ~$74,900 So for roughly $6k more, you get: ✔ 3 rows ✔ 6 seats ✔ Much larger cabin ✔ ~400L extra cargo capacity ✔ Longer wheelbase ✔ Even more range 📊 Quick comparison Model Y Long Range AWD • 5 seats • ~600 km range • 0–100 km/h: 4.8 sec • $68,900 Model Y L Premium AWD • 6 seats • ~681 km range • 0–100 km/h: 5.0 sec • ~$74,900 So performance drops slightly, but practicality goes way up. 🇦🇺 Why this matters in Australia Since Tesla stopped selling the Model X locally, there has been a real gap in the lineup for larger families. The Model Y L doesn’t completely replace the X. You lose things like: ❌ Adaptive air suspension ❌ Driver instrument cluster ❌ Falcon Wing doors ❌ Some luxury interior touches But you still get: ✔ Tesla software ecosystem ✔ Supercharger network ✔ Massive range ✔ Practical 3-row seating And at a much lower price than a Model X ever was. 👨‍👩‍👧‍👦 Who this is perfect for • Growing families • Current Model Y owners needing more space • Former Model X buyers • Anyone considering EV9 / EX90 but wanting Tesla’s ecosystem Personally, as a Model X owner, this is the first Tesla sold in Australia that actually feels like a realistic successor. I’m seriously considering replacing my Model X with the Model Y L, possibly around the end of Q2 or mid-Q3 this year. Not a perfect Model X replacement. But for Australia right now? This might be Tesla’s smartest family vehicle yet. ⚡🇦🇺 ORDER NOW : Tesla Australia & New Zealand Tesla AI

Tesla in the Gong 🇦🇺🦘🤖🚕

21,519 次观看 • 5 个月前

The three-body problem is a classic and notoriously difficult question in physics and mathematics. It asks: How do three objects, such as stars, planets, or moons, move under the influence of each other’s gravity? Unlike the simpler two-body problem, which has precise and predictable analytical solutions (like the Earth orbiting the Sun in an ellipse), the three-body problem quickly becomes chaotic and unpredictable. This complexity arises because each object's motion constantly affects, and is affected by, the other two. These gravitational interactions form a tangled and unstable system. In fact, there's no general formula that can solve all three-body scenarios exactly. This was first demonstrated in the 19th century by Henri Poincaré, whose work laid the foundations for chaos theory. While exact solutions remain elusive, scientists have discovered certain special cases where the motion is stable or periodic. One well-known example is the Lagrange points, where three bodies can maintain a stable triangular configuration. However, such neat solutions are rare. Today, thanks to powerful computers, researchers can simulate three-body systems with remarkable accuracy, helping us study triple-star systems, exoplanets, and asteroid dynamics. Yet even small changes in the starting conditions can lead to dramatically different outcomes, highlighting the sensitive dependence on initial conditions that defines chaotic systems. The three-body problem is actually a specific case of the broader n-body problem, where n can be any number of interacting bodies. As n increases, the complexity and unpredictability rise even further. The three-body problem serves as a vivid example of how simple laws of nature, like Newton’s law of gravity, can produce behavior that is intricate, unexpected, and profoundly difficult to predict.

The three-body problem is a classic and notoriously difficult question in physics and mathematics. It asks: How do three objects, such as stars, planets, or moons, move under the influence of each other’s gravity? Unlike the simpler two-body problem, which has precise and predictable analytical solutions (like the Earth orbiting the Sun in an ellipse), the three-body problem quickly becomes chaotic and unpredictable. This complexity arises because each object's motion constantly affects, and is affected by, the other two. These gravitational interactions form a tangled and unstable system. In fact, there's no general formula that can solve all three-body scenarios exactly. This was first demonstrated in the 19th century by Henri Poincaré, whose work laid the foundations for chaos theory. While exact solutions remain elusive, scientists have discovered certain special cases where the motion is stable or periodic. One well-known example is the Lagrange points, where three bodies can maintain a stable triangular configuration. However, such neat solutions are rare. Today, thanks to powerful computers, researchers can simulate three-body systems with remarkable accuracy, helping us study triple-star systems, exoplanets, and asteroid dynamics. Yet even small changes in the starting conditions can lead to dramatically different outcomes, highlighting the sensitive dependence on initial conditions that defines chaotic systems. The three-body problem is actually a specific case of the broader n-body problem, where n can be any number of interacting bodies. As n increases, the complexity and unpredictability rise even further. The three-body problem serves as a vivid example of how simple laws of nature, like Newton’s law of gravity, can produce behavior that is intricate, unexpected, and profoundly difficult to predict.

Erika 

215,611 次观看 • 1 年前

Ever wish you could focus on just the interesting parts of your 2D plots? Caleb Thomas, a talented member of the MATLAB user community, has made it possible with his open-source Zoomed Axes contribution. Check it out 👉

Ever wish you could focus on just the interesting parts of your 2D plots? Caleb Thomas, a talented member of the MATLAB user community, has made it possible with his open-source Zoomed Axes contribution. Check it out 👉

MATLAB

53,809 次观看 • 7 个月前

May this young man's Soul Rest in Peace. The carnage continues due to unprecedented levels of greed, dereliction of duty, and lack of accountability. The funds are actually there and have been provided over the past decade. The Ministry of Finance Ministry of Finance has released about UGX 100 Billion since 2019 for a Department of Government whose main responsibility and objective should be prevention of road crashes. These funds have been spent on activities with very minimal impact on road safety. This information has been shared with IGG, Office of the Auditor General Uganda, Criminal Investigations Directorate-UPF. How do you explained the death of a young man in a fatal road crash that caused the incineration of the vehicle which he was driving? He must have been driving in one of the best motor vehicles in this country given the wealth of his family. He was driving a motor vehicle which probably had good safety features on a smooth road without pot holes. It is easy to draw conclusions like he was speeding, he was fatigued, he lost control of his motor vehicle, he made errors, e.t.c. Whereas all that may be true, did he deserve to die in such a gruesome way for those errors in judgement? The answer is a BIG NO. The truth is government failed him in so many ways. At the center of modern day road safety management is recognition that errors made by road users (drivers, motorcyclists, cyclist and pedestrians) MUST NOT lead to their demise. Here is a situation he found himself in: Concrete Barriers on a road that encourages high speed. Who has the onus to remove this hazard? Government. I could have perished in the same circumstances a few years back before the completion of the KEE on the way to the Airport. It was a rainy early morning at about 5:00am and I drove through barriers which were made of plastic. So why were these not made of plastic? Was there a provision for lighting on that section? If not, it should have been there. This is what we mean when we say roads should be forgiving. Apart from their design, road sides are the major reference here. The road should have forgiven him for this error if it had plastic reflective barriers. These kind of barriers would have caught his attention and he would have stopped his car instead of killing him. Were the traffic lights functional? Why was there no hazard signage or warning of any sort since there were barriers in middle of the road? This section of the road is built as an expressway and as such encourages speeding especially at any time beyond midnight. There are no traffic calming measures in place yet it is freely used by pedestrians and Boda-Bodaz like any other city road. Roads are supposed to be designed and constructed bearing in mind the activities that take place around them (Land Use). Interventions to control speed must be implemented if there is a high volume of different road users. They would have got his attention and he would not have died. A glaring example of contractors that do not care about road safety is on the section of Kampala-Masaka in the swampy section of Lwera. The Concrete Barriers are there and in places where they are not, there is nothing preventing a motor vehicle falling off into the swamp. Not even a rope. UNTIL THE DAY WHEN THE LEADERSHIP OF THIS COUNTRY ACCEPTS THAT ROAD CRASHES ARE PREVENTABLE AND PARLIAMENT STARTS DEMANDING ACCOUNTABILTY ON ROAD SAFETY, THIS CARNAGE WILL CONTINUE. ACCEPTING THERE IS A PROBLEM IS THE FIRST STEP TO SOLVING IT OR MANAGING IT. TOMORROW IT MIGHT BE ME OR YOU. LETS STOP PAYING LIP SERVICE TO UGANDANS ESPECIALLY ALL THOSE FAMILIES THAT LOSE LOVED ONES IN THIS MESS OF GREED AND LACK OF ACCOUNTABILITY. Uganda Police Force Parliament of Uganda Parliamentary Forum on Road And Water Safety Road Safety Advocacy Coalition Uganda 🇺🇬 Road Sense Kenya - RSK Brian 4RoadSafety roadsafetypros Road Safety Awareness Initiative (Kenya) Road Safety Alliance UN Road Safety Anita Annet Among Safe Transport and Survivors Support Uganda Legacy Road Safety Initiative (LRSI) Uganda Professional Drivers' Network Percy B Mulamba Munwankyo CISCOT Civil Society Coalition On Transport UG Kampala Capital City Authority (KCCA) Greater Kampala Metropolitan Area - UDP Office of the Prime Minister - Uganda

May this young man's Soul Rest in Peace. The carnage continues due to unprecedented levels of greed, dereliction of duty, and lack of accountability. The funds are actually there and have been provided over the past decade. The Ministry of Finance Ministry of Finance has released about UGX 100 Billion since 2019 for a Department of Government whose main responsibility and objective should be prevention of road crashes. These funds have been spent on activities with very minimal impact on road safety. This information has been shared with IGG, Office of the Auditor General Uganda, Criminal Investigations Directorate-UPF. How do you explained the death of a young man in a fatal road crash that caused the incineration of the vehicle which he was driving? He must have been driving in one of the best motor vehicles in this country given the wealth of his family. He was driving a motor vehicle which probably had good safety features on a smooth road without pot holes. It is easy to draw conclusions like he was speeding, he was fatigued, he lost control of his motor vehicle, he made errors, e.t.c. Whereas all that may be true, did he deserve to die in such a gruesome way for those errors in judgement? The answer is a BIG NO. The truth is government failed him in so many ways. At the center of modern day road safety management is recognition that errors made by road users (drivers, motorcyclists, cyclist and pedestrians) MUST NOT lead to their demise. Here is a situation he found himself in: Concrete Barriers on a road that encourages high speed. Who has the onus to remove this hazard? Government. I could have perished in the same circumstances a few years back before the completion of the KEE on the way to the Airport. It was a rainy early morning at about 5:00am and I drove through barriers which were made of plastic. So why were these not made of plastic? Was there a provision for lighting on that section? If not, it should have been there. This is what we mean when we say roads should be forgiving. Apart from their design, road sides are the major reference here. The road should have forgiven him for this error if it had plastic reflective barriers. These kind of barriers would have caught his attention and he would have stopped his car instead of killing him. Were the traffic lights functional? Why was there no hazard signage or warning of any sort since there were barriers in middle of the road? This section of the road is built as an expressway and as such encourages speeding especially at any time beyond midnight. There are no traffic calming measures in place yet it is freely used by pedestrians and Boda-Bodaz like any other city road. Roads are supposed to be designed and constructed bearing in mind the activities that take place around them (Land Use). Interventions to control speed must be implemented if there is a high volume of different road users. They would have got his attention and he would not have died. A glaring example of contractors that do not care about road safety is on the section of Kampala-Masaka in the swampy section of Lwera. The Concrete Barriers are there and in places where they are not, there is nothing preventing a motor vehicle falling off into the swamp. Not even a rope. UNTIL THE DAY WHEN THE LEADERSHIP OF THIS COUNTRY ACCEPTS THAT ROAD CRASHES ARE PREVENTABLE AND PARLIAMENT STARTS DEMANDING ACCOUNTABILTY ON ROAD SAFETY, THIS CARNAGE WILL CONTINUE. ACCEPTING THERE IS A PROBLEM IS THE FIRST STEP TO SOLVING IT OR MANAGING IT. TOMORROW IT MIGHT BE ME OR YOU. LETS STOP PAYING LIP SERVICE TO UGANDANS ESPECIALLY ALL THOSE FAMILIES THAT LOSE LOVED ONES IN THIS MESS OF GREED AND LACK OF ACCOUNTABILITY. Uganda Police Force Parliament of Uganda Parliamentary Forum on Road And Water Safety Road Safety Advocacy Coalition Uganda 🇺🇬 Road Sense Kenya - RSK Brian 4RoadSafety roadsafetypros Road Safety Awareness Initiative (Kenya) Road Safety Alliance UN Road Safety Anita Annet Among Safe Transport and Survivors Support Uganda Legacy Road Safety Initiative (LRSI) Uganda Professional Drivers' Network Percy B Mulamba Munwankyo CISCOT Civil Society Coalition On Transport UG Kampala Capital City Authority (KCCA) Greater Kampala Metropolitan Area - UDP Office of the Prime Minister - Uganda

Ronald Amanyire

41,895 次观看 • 1 年前

What’s New in R2026a? Mike Croucher breaks down some R2026a highlights, covering Simulink Copilot, MATLAB Course Designer, stronger MATLAB↔Python workflows, and major performance improvements ▶️

What’s New in R2026a? Mike Croucher breaks down some R2026a highlights, covering Simulink Copilot, MATLAB Course Designer, stronger MATLAB↔Python workflows, and major performance improvements ▶️

MATLAB

10,147 次观看 • 3 个月前