Active Suspension

Ride, handling and actuator bandwidth for an active suspension.

🚗 Active/Predictive Suspension Configurator

Design active, semi-active, and predictive suspension systems with control strategy optimization

Vehicle Parameters

Sprung Mass

Unsprung Mass (per wheel)

Wheelbase

Track Width

CG Height

Corner Mass

375.00 kg

Roll Gradient

10.98 °/g

Suspension Properties

Spring Rate

N/m

Tire Stiffness

N/m

Static Damping

Ns/m

Wheel Travel

Body Freq

1.42 Hz

Wheel Hop Freq

12.07 Hz

Damping Ratio

0.37 ζ

Target Damping

2817.45 Ns/m

System Configuration

Suspension Type

Actuator Type

Sensor Configuration

Control Strategy

Performance Targets

Comfort vs Handling Balance

ComfortHandling

70%30%

Vehicle Speed

km/h

Effective Preview: -23 ms
System Latency: 23 ms

Actuator Analysis

Required Force

1725.00 N

Actuator Force

3000.00 N

Force Margin

1.74 ×

BW Margin

2.07 ×

✓ Actuator force adequate

✓ Bandwidth sufficient

Power & Cost Analysis

Avg Power (per corner)

95.83 W

Total System Power

200.00 W

System Weight

17.00 kg

Est. System Cost

8300.00 $

Power budget impact:
At highway speed, ~0.02 L/100km fuel penalty
or ~0.7% EV range reduction

Performance Improvement

Comfort Improvement

50.00 %

Roll Compensation

74.76 °

Passive Trans.

1.38

Active Trans.

0.69

Key Benefits:
• 50% reduction in body acceleration
• Up to 74.8° active roll compensation
• 45% better isolation at resonance

Transmissibility (Frequency Response)

Bump Response (50mm)

Control Effort

Control Strategy: Hybrid Skyhook-Groundhook

Combined comfort and handling

Control Latency

3.00 ms

CPU Load

20.00 %

Control Law (hybrid):
F = 0.7×Csky×ẋbody + 0.3×Cgnd×ẋwheel

📋 System Specification

ACTIVE SUSPENSION SYSTEM SPEC
Type: Semi-Active (MR/ER Damper)
Response Time: 23ms

ACTUATORS (×4):
  Type: Magnetorheological Damper
  Peak Force: 3000 N
  Bandwidth: 50 Hz
  Weight: 3.5 kg each

SENSORS:
  Accelerometers: 8
  Height Sensors: 4
  Preview: No

CONTROL:
  Strategy: Hybrid Skyhook-Groundhook
  Latency: 3ms
  CPU Load: 20%

PERFORMANCE:
  Body Freq: 1.4 Hz
  Comfort Gain: 50%
  Power: 200 W

COST: $8300

Loading…